Background: In patients with primary degenerative MR, MVR is curative, with the transcatheter approach being safer than surgical repair. However, it is unknown whether patients with secondary MR from left ventricular dilatation would confer the same benefit of MVR.

Limitations include that investigators were not blinded because the device was visible on imaging. Longer follow-up in the device group may have contributed to the observed decreased mortality. It is unknown whether less-symptomatic patients would attain the same benefit.

Bottom line: In patients with symptomatic, moderate to severe, and severe secondary MR, MVR lowers rates of hospitalization, decreases mortality, and improves quality of life.

Citation: Stone GW et al. Trans­catheter mitral-valve repair in patients with heart failure. N Engl J Med. 2018 Sep 23. doi: 10.1056/NEJMoa1806640.
 

Dr. Kochar is an assistant professor of medicine in the division of hospital medicine at Mount Sinai Hospital, New York.

Background: In patients with primary degenerative MR, MVR is curative, with the transcatheter approach being safer than surgical repair. However, it is unknown whether patients with secondary MR from left ventricular dilatation would confer the same benefit of MVR.

Limitations include that investigators were not blinded because the device was visible on imaging. Longer follow-up in the device group may have contributed to the observed decreased mortality. It is unknown whether less-symptomatic patients would attain the same benefit.

Bottom line: In patients with symptomatic, moderate to severe, and severe secondary MR, MVR lowers rates of hospitalization, decreases mortality, and improves quality of life.

Citation: Stone GW et al. Trans­catheter mitral-valve repair in patients with heart failure. N Engl J Med. 2018 Sep 23. doi: 10.1056/NEJMoa1806640.
 

Dr. Kochar is an assistant professor of medicine in the division of hospital medicine at Mount Sinai Hospital, New York.

Background: In patients with primary degenerative MR, MVR is curative, with the transcatheter approach being safer than surgical repair. However, it is unknown whether patients with secondary MR from left ventricular dilatation would confer the same benefit of MVR.

Limitations include that investigators were not blinded because the device was visible on imaging. Longer follow-up in the device group may have contributed to the observed decreased mortality. It is unknown whether less-symptomatic patients would attain the same benefit.

Bottom line: In patients with symptomatic, moderate to severe, and severe secondary MR, MVR lowers rates of hospitalization, decreases mortality, and improves quality of life.

Citation: Stone GW et al. Trans­catheter mitral-valve repair in patients with heart failure. N Engl J Med. 2018 Sep 23. doi: 10.1056/NEJMoa1806640.
 

Dr. Kochar is an assistant professor of medicine in the division of hospital medicine at Mount Sinai Hospital, New York.

For patients with nonalcoholic fatty liver disease (NAFLD), formal weight loss programs lead to statistically and clinically significant improvements in biomarkers of liver disease, based on a recent meta-analysis.

The findings support changing NAFLD guidelines to recommend weight loss interventions, according to lead author Dimitrios A. Koutoukidis, PhD, of the University of Oxford, UK, and colleagues.

“Clinical guidelines around the world recommend physicians offer advice on lifestyle modification, which mostly includes weight loss through hypoenergetic diets and increased physical activity,” the investigators wrote in JAMA Internal Medicine.“However, whether clinicians provide advice and the type of advice they give vary greatly, and guidelines rarely specifically recommend treatment programs to support weight loss,” they added.

To investigate associations between methods of weight loss and improvements in NAFLD, the investigators screened for studies involving behavioral weight loss programs, pharmacotherapy, or bariatric surgery, alone or in combination. To limit confounding, studies combining weight loss with other potential treatments, such as medications, were excluded. Weight loss interventions were compared to liver disease outcomes associated with lower-intensity weight loss intervention or none or minimal weight loss support, using at least 1 reported biomarker of liver disease.

The literature search returned 22 eligible studies involving 2,588 patients. The investigators found that more intensive weight loss programs were associated with greater weight loss than lower intensity methods (-3.61 kg; I² = 95%). Multiple biomarkers of liver disease showed significant improvements in association with formal weight loss programs, including histologically or radiologically measured liver steatosis (standardized mean difference: -1.48; I² = 94%), histologic NAFLD activity score (-0.92; I²= 95%), presence of nonalcoholic steatohepatitis (OR, 0.14; I² =0%), alanine aminotransferase (-9.81 U/L; I²= 97%), aspartate transaminase (-4.84 U/L; I² = 96%), alkaline phosphatase (-5.53 U/L; I² = 96%), and gamma-glutamyl transferase (-4.35 U/L; I² = 92%). Weight loss interventions were not significantly associated with histologic liver fibrosis or inflammation, the investigators noted.

“The advantages [of weight loss interventions] seem to be greater in people who are overweight and with NAFLD, but our exploratory results suggest that weight loss interventions might still be beneficial in the minority of people with healthy weight and NAFLD,” the investigators wrote. “Clinicians may use these findings to counsel people with NAFLD on the expected clinically significant improvements in liver biomarkers after weight loss and direct the patients toward valuable interventions.”

“The accumulated evidence supports changing the clinical guidelines and routine practice to recommend formal weight loss programs to treat people with NAFLD,” the investigators concluded.

The study was funded by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre and the Oxford NIHR Collaboration and Leadership in Applied Health Research. The investigators reported grants for other research from Cambridge Weight Plan.

SOURCE: Koutoukidis et al. JAMA Int Med. 2019 Jul 1. doi: 10.1001/jamainternmed.2019.2248.

The AGA Practice guide on Obesity and Weight management, Education and Resources (POWER) paper provides physicians with a comprehensive, multi-disciplinary process to guide and personalize innovative obesity care for safe and effective weight management. Learn more at https://www.gastro.org/practice-guidance/practice-updates/obesity-practice-guide

For patients with nonalcoholic fatty liver disease (NAFLD), formal weight loss programs lead to statistically and clinically significant improvements in biomarkers of liver disease, based on a recent meta-analysis.

The findings support changing NAFLD guidelines to recommend weight loss interventions, according to lead author Dimitrios A. Koutoukidis, PhD, of the University of Oxford, UK, and colleagues.

“Clinical guidelines around the world recommend physicians offer advice on lifestyle modification, which mostly includes weight loss through hypoenergetic diets and increased physical activity,” the investigators wrote in JAMA Internal Medicine.“However, whether clinicians provide advice and the type of advice they give vary greatly, and guidelines rarely specifically recommend treatment programs to support weight loss,” they added.

To investigate associations between methods of weight loss and improvements in NAFLD, the investigators screened for studies involving behavioral weight loss programs, pharmacotherapy, or bariatric surgery, alone or in combination. To limit confounding, studies combining weight loss with other potential treatments, such as medications, were excluded. Weight loss interventions were compared to liver disease outcomes associated with lower-intensity weight loss intervention or none or minimal weight loss support, using at least 1 reported biomarker of liver disease.

The literature search returned 22 eligible studies involving 2,588 patients. The investigators found that more intensive weight loss programs were associated with greater weight loss than lower intensity methods (-3.61 kg; I² = 95%). Multiple biomarkers of liver disease showed significant improvements in association with formal weight loss programs, including histologically or radiologically measured liver steatosis (standardized mean difference: -1.48; I² = 94%), histologic NAFLD activity score (-0.92; I²= 95%), presence of nonalcoholic steatohepatitis (OR, 0.14; I² =0%), alanine aminotransferase (-9.81 U/L; I²= 97%), aspartate transaminase (-4.84 U/L; I² = 96%), alkaline phosphatase (-5.53 U/L; I² = 96%), and gamma-glutamyl transferase (-4.35 U/L; I² = 92%). Weight loss interventions were not significantly associated with histologic liver fibrosis or inflammation, the investigators noted.

“The advantages [of weight loss interventions] seem to be greater in people who are overweight and with NAFLD, but our exploratory results suggest that weight loss interventions might still be beneficial in the minority of people with healthy weight and NAFLD,” the investigators wrote. “Clinicians may use these findings to counsel people with NAFLD on the expected clinically significant improvements in liver biomarkers after weight loss and direct the patients toward valuable interventions.”

“The accumulated evidence supports changing the clinical guidelines and routine practice to recommend formal weight loss programs to treat people with NAFLD,” the investigators concluded.

The study was funded by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre and the Oxford NIHR Collaboration and Leadership in Applied Health Research. The investigators reported grants for other research from Cambridge Weight Plan.

SOURCE: Koutoukidis et al. JAMA Int Med. 2019 Jul 1. doi: 10.1001/jamainternmed.2019.2248.

The AGA Practice guide on Obesity and Weight management, Education and Resources (POWER) paper provides physicians with a comprehensive, multi-disciplinary process to guide and personalize innovative obesity care for safe and effective weight management. Learn more at https://www.gastro.org/practice-guidance/practice-updates/obesity-practice-guide

For patients with nonalcoholic fatty liver disease (NAFLD), formal weight loss programs lead to statistically and clinically significant improvements in biomarkers of liver disease, based on a recent meta-analysis.

The findings support changing NAFLD guidelines to recommend weight loss interventions, according to lead author Dimitrios A. Koutoukidis, PhD, of the University of Oxford, UK, and colleagues.

“Clinical guidelines around the world recommend physicians offer advice on lifestyle modification, which mostly includes weight loss through hypoenergetic diets and increased physical activity,” the investigators wrote in JAMA Internal Medicine.“However, whether clinicians provide advice and the type of advice they give vary greatly, and guidelines rarely specifically recommend treatment programs to support weight loss,” they added.

To investigate associations between methods of weight loss and improvements in NAFLD, the investigators screened for studies involving behavioral weight loss programs, pharmacotherapy, or bariatric surgery, alone or in combination. To limit confounding, studies combining weight loss with other potential treatments, such as medications, were excluded. Weight loss interventions were compared to liver disease outcomes associated with lower-intensity weight loss intervention or none or minimal weight loss support, using at least 1 reported biomarker of liver disease.

The literature search returned 22 eligible studies involving 2,588 patients. The investigators found that more intensive weight loss programs were associated with greater weight loss than lower intensity methods (-3.61 kg; I² = 95%). Multiple biomarkers of liver disease showed significant improvements in association with formal weight loss programs, including histologically or radiologically measured liver steatosis (standardized mean difference: -1.48; I² = 94%), histologic NAFLD activity score (-0.92; I²= 95%), presence of nonalcoholic steatohepatitis (OR, 0.14; I² =0%), alanine aminotransferase (-9.81 U/L; I²= 97%), aspartate transaminase (-4.84 U/L; I² = 96%), alkaline phosphatase (-5.53 U/L; I² = 96%), and gamma-glutamyl transferase (-4.35 U/L; I² = 92%). Weight loss interventions were not significantly associated with histologic liver fibrosis or inflammation, the investigators noted.

“The advantages [of weight loss interventions] seem to be greater in people who are overweight and with NAFLD, but our exploratory results suggest that weight loss interventions might still be beneficial in the minority of people with healthy weight and NAFLD,” the investigators wrote. “Clinicians may use these findings to counsel people with NAFLD on the expected clinically significant improvements in liver biomarkers after weight loss and direct the patients toward valuable interventions.”

“The accumulated evidence supports changing the clinical guidelines and routine practice to recommend formal weight loss programs to treat people with NAFLD,” the investigators concluded.

The study was funded by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre and the Oxford NIHR Collaboration and Leadership in Applied Health Research. The investigators reported grants for other research from Cambridge Weight Plan.

SOURCE: Koutoukidis et al. JAMA Int Med. 2019 Jul 1. doi: 10.1001/jamainternmed.2019.2248.

The AGA Practice guide on Obesity and Weight management, Education and Resources (POWER) paper provides physicians with a comprehensive, multi-disciplinary process to guide and personalize innovative obesity care for safe and effective weight management. Learn more at https://www.gastro.org/practice-guidance/practice-updates/obesity-practice-guide

For patients with nonalcoholic fatty liver disease (NAFLD), formal weight loss programs lead to statistically and clinically significant improvements in biomarkers of liver disease, based on a recent meta-analysis.

Eraxion/Thinkstock

The findings support changing NAFLD guidelines to recommend weight loss interventions, according to lead author Dimitrios A. Koutoukidis, PhD, of the University of Oxford, UK, and colleagues. “Clinical guidelines around the world recommend physicians offer advice on lifestyle modification, which mostly includes weight loss through hypoenergetic diets and increased physical activity,” the investigators wrote in JAMA Internal Medicine. “However, whether clinicians provide advice and the type of advice they give vary greatly, and guidelines rarely specifically recommend treatment programs to support weight loss,” they added.

To investigate associations between methods of weight loss and improvements in NAFLD, the investigators screened for studies involving behavioral weight loss programs, pharmacotherapy, or bariatric surgery, alone or in combination. To limit confounding, studies combining weight loss with other potential treatments, such as medications, were excluded. Weight loss interventions were compared to liver disease outcomes associated with lower-intensity weight loss intervention or none or minimal weight loss support, using at least 1 reported biomarker of liver disease. The literature search returned 22 eligible studies involving 2,588 patients.

The investigators found that more intensive weight loss programs were associated with greater weight loss than lower intensity methods (-3.61 kg; I² = 95%). Multiple biomarkers of liver disease showed significant improvements in association with formal weight loss programs, including histologically or radiologically measured liver steatosis (standardized mean difference: -1.48; I² = 94%), histologic NAFLD activity score (-0.92; I²= 95%), presence of nonalcoholic steatohepatitis (OR, 0.14; I² =0%), alanine aminotransferase (-9.81 U/L; I²= 97%), aspartate transaminase (-4.84 U/L; I² = 96%), alkaline phosphatase (-5.53 U/L; I² = 96%), and gamma-glutamyl transferase (-4.35 U/L; I² = 92%). Weight loss interventions were not significantly associated with histologic liver fibrosis or inflammation, the investigators noted.

“The advantages [of weight loss interventions] seem to be greater in people who are overweight and with NAFLD, but our exploratory results suggest that weight loss interventions might still be beneficial in the minority of people with healthy weight and NAFLD,” the investigators wrote. “Clinicians may use these findings to counsel people with NAFLD on the expected clinically significant improvements in liver biomarkers after weight loss and direct the patients toward valuable interventions.”

“The accumulated evidence supports changing the clinical guidelines and routine practice to recommend formal weight loss programs to treat people with NAFLD,” the investigators concluded.

The study was funded by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre and the Oxford NIHR Collaboration and Leadership in Applied Health Research. The investigators reported grants for other research from Cambridge Weight Plan.

SOURCE: Koutoukidis et al. JAMA Int Med. 2019 Jul 1. doi: 10.1001/jamainternmed.2019.2248.

For patients with nonalcoholic fatty liver disease (NAFLD), formal weight loss programs lead to statistically and clinically significant improvements in biomarkers of liver disease, based on a recent meta-analysis.

Eraxion/Thinkstock

The findings support changing NAFLD guidelines to recommend weight loss interventions, according to lead author Dimitrios A. Koutoukidis, PhD, of the University of Oxford, UK, and colleagues. “Clinical guidelines around the world recommend physicians offer advice on lifestyle modification, which mostly includes weight loss through hypoenergetic diets and increased physical activity,” the investigators wrote in JAMA Internal Medicine. “However, whether clinicians provide advice and the type of advice they give vary greatly, and guidelines rarely specifically recommend treatment programs to support weight loss,” they added.

To investigate associations between methods of weight loss and improvements in NAFLD, the investigators screened for studies involving behavioral weight loss programs, pharmacotherapy, or bariatric surgery, alone or in combination. To limit confounding, studies combining weight loss with other potential treatments, such as medications, were excluded. Weight loss interventions were compared to liver disease outcomes associated with lower-intensity weight loss intervention or none or minimal weight loss support, using at least 1 reported biomarker of liver disease. The literature search returned 22 eligible studies involving 2,588 patients.

The investigators found that more intensive weight loss programs were associated with greater weight loss than lower intensity methods (-3.61 kg; I² = 95%). Multiple biomarkers of liver disease showed significant improvements in association with formal weight loss programs, including histologically or radiologically measured liver steatosis (standardized mean difference: -1.48; I² = 94%), histologic NAFLD activity score (-0.92; I²= 95%), presence of nonalcoholic steatohepatitis (OR, 0.14; I² =0%), alanine aminotransferase (-9.81 U/L; I²= 97%), aspartate transaminase (-4.84 U/L; I² = 96%), alkaline phosphatase (-5.53 U/L; I² = 96%), and gamma-glutamyl transferase (-4.35 U/L; I² = 92%). Weight loss interventions were not significantly associated with histologic liver fibrosis or inflammation, the investigators noted.

“The advantages [of weight loss interventions] seem to be greater in people who are overweight and with NAFLD, but our exploratory results suggest that weight loss interventions might still be beneficial in the minority of people with healthy weight and NAFLD,” the investigators wrote. “Clinicians may use these findings to counsel people with NAFLD on the expected clinically significant improvements in liver biomarkers after weight loss and direct the patients toward valuable interventions.”

“The accumulated evidence supports changing the clinical guidelines and routine practice to recommend formal weight loss programs to treat people with NAFLD,” the investigators concluded.

The study was funded by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre and the Oxford NIHR Collaboration and Leadership in Applied Health Research. The investigators reported grants for other research from Cambridge Weight Plan.

SOURCE: Koutoukidis et al. JAMA Int Med. 2019 Jul 1. doi: 10.1001/jamainternmed.2019.2248.

For patients with nonalcoholic fatty liver disease (NAFLD), formal weight loss programs lead to statistically and clinically significant improvements in biomarkers of liver disease, based on a recent meta-analysis.

Eraxion/Thinkstock

The findings support changing NAFLD guidelines to recommend weight loss interventions, according to lead author Dimitrios A. Koutoukidis, PhD, of the University of Oxford, UK, and colleagues. “Clinical guidelines around the world recommend physicians offer advice on lifestyle modification, which mostly includes weight loss through hypoenergetic diets and increased physical activity,” the investigators wrote in JAMA Internal Medicine. “However, whether clinicians provide advice and the type of advice they give vary greatly, and guidelines rarely specifically recommend treatment programs to support weight loss,” they added.

To investigate associations between methods of weight loss and improvements in NAFLD, the investigators screened for studies involving behavioral weight loss programs, pharmacotherapy, or bariatric surgery, alone or in combination. To limit confounding, studies combining weight loss with other potential treatments, such as medications, were excluded. Weight loss interventions were compared to liver disease outcomes associated with lower-intensity weight loss intervention or none or minimal weight loss support, using at least 1 reported biomarker of liver disease. The literature search returned 22 eligible studies involving 2,588 patients.

The investigators found that more intensive weight loss programs were associated with greater weight loss than lower intensity methods (-3.61 kg; I² = 95%). Multiple biomarkers of liver disease showed significant improvements in association with formal weight loss programs, including histologically or radiologically measured liver steatosis (standardized mean difference: -1.48; I² = 94%), histologic NAFLD activity score (-0.92; I²= 95%), presence of nonalcoholic steatohepatitis (OR, 0.14; I² =0%), alanine aminotransferase (-9.81 U/L; I²= 97%), aspartate transaminase (-4.84 U/L; I² = 96%), alkaline phosphatase (-5.53 U/L; I² = 96%), and gamma-glutamyl transferase (-4.35 U/L; I² = 92%). Weight loss interventions were not significantly associated with histologic liver fibrosis or inflammation, the investigators noted.

“The advantages [of weight loss interventions] seem to be greater in people who are overweight and with NAFLD, but our exploratory results suggest that weight loss interventions might still be beneficial in the minority of people with healthy weight and NAFLD,” the investigators wrote. “Clinicians may use these findings to counsel people with NAFLD on the expected clinically significant improvements in liver biomarkers after weight loss and direct the patients toward valuable interventions.”

“The accumulated evidence supports changing the clinical guidelines and routine practice to recommend formal weight loss programs to treat people with NAFLD,” the investigators concluded.

The study was funded by the National Institute for Health Research (NIHR) Oxford Biomedical Research Centre and the Oxford NIHR Collaboration and Leadership in Applied Health Research. The investigators reported grants for other research from Cambridge Weight Plan.

SOURCE: Koutoukidis et al. JAMA Int Med. 2019 Jul 1. doi: 10.1001/jamainternmed.2019.2248.

Radioactive iodine therapy for hyperthyroidism may be associated with an increased risk of death from cancer, according to a longitudinal cohort study published in the July 1 issue of JAMA Internal Medicine.

Sebastian Kaulitzki/Fotolia

The study followed 18,805 individuals whose hyperthyroidism was treated with radioactive iodine in the United States and United Kingdom between 1946 and 1964.

Researchers found positive dose-response relationships between radioactive iodine therapy and most of the solid cancers that were evaluated. However these only attained statistical significance in the case of female breast cancer – where there was a 12% increase in the risk of death from breast cancer from a 100-mGy tissue- or organ-absorbed dose – or for all solid cancers combined, where a 100-mGy dose to the stomach was associated with a 6% increase in death from all solid cancers.

Based on this, the authors estimated that 8% of solid cancer deaths, including 14% of breast cancer deaths, could be attributed to the radiation. When combined with current US mortality rates, that translated to around 13 excess solid cancer deaths, including three deaths from breast cancer, for every 1000 patients receiving a 100 mGy absorbed dose to the stomach or breast at age 40 years.

However they noted that patients with Graves disease are now recommended to receive higher doses, and calculated that for 150-mGy, 200-mGy and 250-mGy dosages there would be 19-32 excess solid cancer deaths per 1000 patients treated at age 40 years.

“To our knowledge, this is the first study to characterize the dose-response relationship between RAI treatment and site-specific cancer mortality in patients with hyperthyroidism using reliable estimates of absorbed dose to exposed organs or tissues,” wrote Cari M. Kitahara, PhD, from the Division of Cancer Epidemiology and Genetics at the National Cancer Institute, and co-authors.

Radioactive iodine therapy did not appear to be associated with an increased risk of death from leukemia, non-Hodgkin lymphoma or multiple myeloma.

The authors noted that this was unexpected given previous findings of an elevated risk of leukemia in patients with thyroid cancer who received higher levels of radiation. They suggested that the greater uncertainty in calculation of red bone marrow exposure compared to that of other organs and tissue, as well as the relatively small number of leukemia deaths, may have limited their ability to detect a dose-response relationship.

The study was funded by the National Cancer Institute. One author declared membership of a consortium supported by the pharmaceutical sector.
 

SOURCE: Kitahara C et al. JAMA Internal Medicine 2019, July 1. DOI:10.1001/jamainternmed.2019.0981.

Radioactive iodine therapy for hyperthyroidism may be associated with an increased risk of death from cancer, according to a longitudinal cohort study published in the July 1 issue of JAMA Internal Medicine.

Sebastian Kaulitzki/Fotolia

The study followed 18,805 individuals whose hyperthyroidism was treated with radioactive iodine in the United States and United Kingdom between 1946 and 1964.

Researchers found positive dose-response relationships between radioactive iodine therapy and most of the solid cancers that were evaluated. However these only attained statistical significance in the case of female breast cancer – where there was a 12% increase in the risk of death from breast cancer from a 100-mGy tissue- or organ-absorbed dose – or for all solid cancers combined, where a 100-mGy dose to the stomach was associated with a 6% increase in death from all solid cancers.

Based on this, the authors estimated that 8% of solid cancer deaths, including 14% of breast cancer deaths, could be attributed to the radiation. When combined with current US mortality rates, that translated to around 13 excess solid cancer deaths, including three deaths from breast cancer, for every 1000 patients receiving a 100 mGy absorbed dose to the stomach or breast at age 40 years.

However they noted that patients with Graves disease are now recommended to receive higher doses, and calculated that for 150-mGy, 200-mGy and 250-mGy dosages there would be 19-32 excess solid cancer deaths per 1000 patients treated at age 40 years.

“To our knowledge, this is the first study to characterize the dose-response relationship between RAI treatment and site-specific cancer mortality in patients with hyperthyroidism using reliable estimates of absorbed dose to exposed organs or tissues,” wrote Cari M. Kitahara, PhD, from the Division of Cancer Epidemiology and Genetics at the National Cancer Institute, and co-authors.

Radioactive iodine therapy did not appear to be associated with an increased risk of death from leukemia, non-Hodgkin lymphoma or multiple myeloma.

The authors noted that this was unexpected given previous findings of an elevated risk of leukemia in patients with thyroid cancer who received higher levels of radiation. They suggested that the greater uncertainty in calculation of red bone marrow exposure compared to that of other organs and tissue, as well as the relatively small number of leukemia deaths, may have limited their ability to detect a dose-response relationship.

The study was funded by the National Cancer Institute. One author declared membership of a consortium supported by the pharmaceutical sector.
 

SOURCE: Kitahara C et al. JAMA Internal Medicine 2019, July 1. DOI:10.1001/jamainternmed.2019.0981.

Radioactive iodine therapy for hyperthyroidism may be associated with an increased risk of death from cancer, according to a longitudinal cohort study published in the July 1 issue of JAMA Internal Medicine.

Sebastian Kaulitzki/Fotolia

The study followed 18,805 individuals whose hyperthyroidism was treated with radioactive iodine in the United States and United Kingdom between 1946 and 1964.

Researchers found positive dose-response relationships between radioactive iodine therapy and most of the solid cancers that were evaluated. However these only attained statistical significance in the case of female breast cancer – where there was a 12% increase in the risk of death from breast cancer from a 100-mGy tissue- or organ-absorbed dose – or for all solid cancers combined, where a 100-mGy dose to the stomach was associated with a 6% increase in death from all solid cancers.

Based on this, the authors estimated that 8% of solid cancer deaths, including 14% of breast cancer deaths, could be attributed to the radiation. When combined with current US mortality rates, that translated to around 13 excess solid cancer deaths, including three deaths from breast cancer, for every 1000 patients receiving a 100 mGy absorbed dose to the stomach or breast at age 40 years.

However they noted that patients with Graves disease are now recommended to receive higher doses, and calculated that for 150-mGy, 200-mGy and 250-mGy dosages there would be 19-32 excess solid cancer deaths per 1000 patients treated at age 40 years.

“To our knowledge, this is the first study to characterize the dose-response relationship between RAI treatment and site-specific cancer mortality in patients with hyperthyroidism using reliable estimates of absorbed dose to exposed organs or tissues,” wrote Cari M. Kitahara, PhD, from the Division of Cancer Epidemiology and Genetics at the National Cancer Institute, and co-authors.

Radioactive iodine therapy did not appear to be associated with an increased risk of death from leukemia, non-Hodgkin lymphoma or multiple myeloma.

The authors noted that this was unexpected given previous findings of an elevated risk of leukemia in patients with thyroid cancer who received higher levels of radiation. They suggested that the greater uncertainty in calculation of red bone marrow exposure compared to that of other organs and tissue, as well as the relatively small number of leukemia deaths, may have limited their ability to detect a dose-response relationship.

The study was funded by the National Cancer Institute. One author declared membership of a consortium supported by the pharmaceutical sector.
 

SOURCE: Kitahara C et al. JAMA Internal Medicine 2019, July 1. DOI:10.1001/jamainternmed.2019.0981.

Breast density should be a factor in assessing breast cancer risk and recommending supplemental imaging, but not the primary factor, according to a study of women who were screened for the disease.

Dr. Cecil Fox/National Cancer Institute

“Counseling strategies that identified women for supplemental imaging based on breast density and BCSC 5-year risk were more efficient compared with strategies based on age and density or density alone,” wrote Karla Kerlikowske, MD, of the Department of Veterans Affairs, and her coauthors. The study was published in JAMA Internal Medicine.

To assess breast cancer risk and strategies for recommending supplemental screening, the researchers assembled a cohort of 638,856 women aged 40 to 74 years who received mammograms at Breast Cancer Surveillance Consortium (BCSC) facilities from Jan. 3, 2005, to Dec. 31, 2014. Participants were identified as high risk via combinations of Breast Imaging Reporting and Data System (BI-RADS) breast density, BCSC 5-year breast cancer risk, and age.

Women with dense breasts made up 47% of those screened, and 60% of those with advanced cancers. Low advanced cancer rates (less than .61 per 1,000 mammograms) occurred in 34.5% of women with dense breasts, while high advanced cancer rates (greater than or equal to .61 cases per 1,000 mammograms) occurred in women with heterogeneously dense breasts and a 5-year risk of 2.5% or higher (6.0% of screened women) and those with extremely dense breasts and a 5-year risk of 1.0% or higher (6.5% of screened women).

In a hypothetical cohort of 100,000 women, supplemental imaging for all 47,012 women with dense breasts would mean a ratio of 1,866 supplemental imaging discussions per potential advanced breast cancer prevented. If imaging was considered based on a combination of density plus BCSC 5-year risk, the number of women screened would be reduced to 12,506 and the ratio would become 1,097 supplemental imaging discussions per potential advanced cancer prevented.

The coauthors acknowledged their study’s limitations, including their lack of ability to determine if women at high risk of advanced cancer would benefit from supplemental screening. In addition, they were unable to evaluate digital breast tomosynthesis outcomes, though they noted that, to their knowledge, “no published evidence indicates that advanced cancer rates differ for digital mammography vs. tomosynthesis according to breast density.”

The study was funded by the Patient-Centered Outcomes Research Institute, the Breast Cancer Surveillance Consortium, the National Cancer Institute, the Agency for Health Research and Quality, and the Lake Champlain Cancer Research Organization. The authors reported several potential conflicts of interest, including being members of various working groups, advisory boards, committees, task forces, and panels.

SOURCE: Kerlikowske K et al. JAMA Intern Med. 2019 Jul 1. doi:10.1001/jamainternmed.2019.1758 .

Breast density should be a factor in assessing breast cancer risk and recommending supplemental imaging, but not the primary factor, according to a study of women who were screened for the disease.

Dr. Cecil Fox/National Cancer Institute

“Counseling strategies that identified women for supplemental imaging based on breast density and BCSC 5-year risk were more efficient compared with strategies based on age and density or density alone,” wrote Karla Kerlikowske, MD, of the Department of Veterans Affairs, and her coauthors. The study was published in JAMA Internal Medicine.

To assess breast cancer risk and strategies for recommending supplemental screening, the researchers assembled a cohort of 638,856 women aged 40 to 74 years who received mammograms at Breast Cancer Surveillance Consortium (BCSC) facilities from Jan. 3, 2005, to Dec. 31, 2014. Participants were identified as high risk via combinations of Breast Imaging Reporting and Data System (BI-RADS) breast density, BCSC 5-year breast cancer risk, and age.

Women with dense breasts made up 47% of those screened, and 60% of those with advanced cancers. Low advanced cancer rates (less than .61 per 1,000 mammograms) occurred in 34.5% of women with dense breasts, while high advanced cancer rates (greater than or equal to .61 cases per 1,000 mammograms) occurred in women with heterogeneously dense breasts and a 5-year risk of 2.5% or higher (6.0% of screened women) and those with extremely dense breasts and a 5-year risk of 1.0% or higher (6.5% of screened women).

In a hypothetical cohort of 100,000 women, supplemental imaging for all 47,012 women with dense breasts would mean a ratio of 1,866 supplemental imaging discussions per potential advanced breast cancer prevented. If imaging was considered based on a combination of density plus BCSC 5-year risk, the number of women screened would be reduced to 12,506 and the ratio would become 1,097 supplemental imaging discussions per potential advanced cancer prevented.

The coauthors acknowledged their study’s limitations, including their lack of ability to determine if women at high risk of advanced cancer would benefit from supplemental screening. In addition, they were unable to evaluate digital breast tomosynthesis outcomes, though they noted that, to their knowledge, “no published evidence indicates that advanced cancer rates differ for digital mammography vs. tomosynthesis according to breast density.”

The study was funded by the Patient-Centered Outcomes Research Institute, the Breast Cancer Surveillance Consortium, the National Cancer Institute, the Agency for Health Research and Quality, and the Lake Champlain Cancer Research Organization. The authors reported several potential conflicts of interest, including being members of various working groups, advisory boards, committees, task forces, and panels.

SOURCE: Kerlikowske K et al. JAMA Intern Med. 2019 Jul 1. doi:10.1001/jamainternmed.2019.1758 .

Breast density should be a factor in assessing breast cancer risk and recommending supplemental imaging, but not the primary factor, according to a study of women who were screened for the disease.

Dr. Cecil Fox/National Cancer Institute

“Counseling strategies that identified women for supplemental imaging based on breast density and BCSC 5-year risk were more efficient compared with strategies based on age and density or density alone,” wrote Karla Kerlikowske, MD, of the Department of Veterans Affairs, and her coauthors. The study was published in JAMA Internal Medicine.

To assess breast cancer risk and strategies for recommending supplemental screening, the researchers assembled a cohort of 638,856 women aged 40 to 74 years who received mammograms at Breast Cancer Surveillance Consortium (BCSC) facilities from Jan. 3, 2005, to Dec. 31, 2014. Participants were identified as high risk via combinations of Breast Imaging Reporting and Data System (BI-RADS) breast density, BCSC 5-year breast cancer risk, and age.

Women with dense breasts made up 47% of those screened, and 60% of those with advanced cancers. Low advanced cancer rates (less than .61 per 1,000 mammograms) occurred in 34.5% of women with dense breasts, while high advanced cancer rates (greater than or equal to .61 cases per 1,000 mammograms) occurred in women with heterogeneously dense breasts and a 5-year risk of 2.5% or higher (6.0% of screened women) and those with extremely dense breasts and a 5-year risk of 1.0% or higher (6.5% of screened women).

In a hypothetical cohort of 100,000 women, supplemental imaging for all 47,012 women with dense breasts would mean a ratio of 1,866 supplemental imaging discussions per potential advanced breast cancer prevented. If imaging was considered based on a combination of density plus BCSC 5-year risk, the number of women screened would be reduced to 12,506 and the ratio would become 1,097 supplemental imaging discussions per potential advanced cancer prevented.

The coauthors acknowledged their study’s limitations, including their lack of ability to determine if women at high risk of advanced cancer would benefit from supplemental screening. In addition, they were unable to evaluate digital breast tomosynthesis outcomes, though they noted that, to their knowledge, “no published evidence indicates that advanced cancer rates differ for digital mammography vs. tomosynthesis according to breast density.”

The study was funded by the Patient-Centered Outcomes Research Institute, the Breast Cancer Surveillance Consortium, the National Cancer Institute, the Agency for Health Research and Quality, and the Lake Champlain Cancer Research Organization. The authors reported several potential conflicts of interest, including being members of various working groups, advisory boards, committees, task forces, and panels.

SOURCE: Kerlikowske K et al. JAMA Intern Med. 2019 Jul 1. doi:10.1001/jamainternmed.2019.1758 .

SAN FRANCISCO – Are you having trouble helping patients take their diabetes medications as directed? Try installing 32-inch screens in the examination rooms for a lab result show-and-tell. Keep pharmaceutical marketers out of your hair (and office). Talk about smartphone alarms, promote auto-fill services, and understand why patients don’t adhere to their regimens.

Those are among the suggestions offered by two physicians during a symposium on drug adherence at the annual scientific sessions of the American Diabetes Association.

“Nonadherence is not a case of patients being bad,” said internist and researcher Niteesh K. Choudhry, MD, PhD, of Harvard Medical School and Brigham and Women’s Hospital, Boston. “When half of your patients are nonadherent, I can guarantee you [they] aren’t trying to hurt themselves.”

According to Dr. Choudhry’s own research published in 2011 and based on 2008 data, about 25% of patients do not fill prescriptions after leaving their doctors’ offices. That level for diabetes medications – 42% of patients – is especially high (Am J Med. 2011;124[11]:1081.e9-22).

Other findings, he said, have suggested that half of patients fail to adhere to evidence-based prescribed regimens over the long term. And three groups have especially low levels of adherence: people of color, women, and patients who are caregivers (possibly because they are too busy caring for others to care for themselves).

Various factors affect adherence, including forgetfulness, drug interactions or side effects, and the different colors and shapes of pills. The latter can confuse patients because colors and shapes may be different from prescription to prescription even for the same medication, he said.

Dr. Choudhry added that there’s another factor: multiple prescriptions from multiple physicians that require multiple pharmacy visits. His findings suggest that adherence improves when prescriptions are consolidated to limit the need to visit the drugstore. “The chaos of our health care system leads to nonadherence,” he said (Arch Intern Med. 2011;171[9]:814-22).

Internist Lawrence Garber, MD, of Reliant Medical Group in Worcester, Mass., offered these tips about boosting drug adherence:

• Develop trust with patients. “They need to trust that I’m their advocate, and that they’re my No. 1 reason for prescribing the medication, and not making myself more money,” he said.
• Provide educational resources. “We give them resources online. If their EHR [electronic health record] identifies that they’re diabetic, then they get information about diabetes printed out.”
• Use technology to promote messages about diabetes. Dr. Garber said his clinic has installed screens in the examination rooms so that he can show patients their data. “It [makes it] very clear for them to see why what they’re doing now is not working,’’ and why there is a need to change to a different regimen. In addition, screens in the waiting room can display educational slides about diabetes.
• Set up clinic-wide medication protocols. “We’ve set up protocols and pathways for diabetes, hypertension, and high cholesterol to make it easy to prescribe medications that are lower cost and to make sure we’re following the same path,” Dr. Garber said.
• Stay independent. “I haven’t seen a drug rep in decades. It’s an organizational policy that we don’t see them, so we’re less likely to be biased.”
• Make it easier for patients to take medications. Dr. Garber urged colleagues to talk to their patients about using strategies such as printed pill schedules, weekly pill organizers, auto refills, and smartphone alarm reminders to facilitate adherence.

And, he said, you may wish to make it clear that you will check on whether prescriptions are filled. That way, “the patients know that you’re looking,” and it can actually lead to improved adherence.

Dr. Choudhry reported that his research has been funded by unrestricted grants to his institution from insurers, government funders, nonprofit foundations, pharmaceutical companies (including Merck, Sanofi, and Astra Zeneca), and device makers (including Medisafe). Dr. Garber reported no relevant disclosures.

SAN FRANCISCO – Are you having trouble helping patients take their diabetes medications as directed? Try installing 32-inch screens in the examination rooms for a lab result show-and-tell. Keep pharmaceutical marketers out of your hair (and office). Talk about smartphone alarms, promote auto-fill services, and understand why patients don’t adhere to their regimens.

Those are among the suggestions offered by two physicians during a symposium on drug adherence at the annual scientific sessions of the American Diabetes Association.

“Nonadherence is not a case of patients being bad,” said internist and researcher Niteesh K. Choudhry, MD, PhD, of Harvard Medical School and Brigham and Women’s Hospital, Boston. “When half of your patients are nonadherent, I can guarantee you [they] aren’t trying to hurt themselves.”

According to Dr. Choudhry’s own research published in 2011 and based on 2008 data, about 25% of patients do not fill prescriptions after leaving their doctors’ offices. That level for diabetes medications – 42% of patients – is especially high (Am J Med. 2011;124[11]:1081.e9-22).

Other findings, he said, have suggested that half of patients fail to adhere to evidence-based prescribed regimens over the long term. And three groups have especially low levels of adherence: people of color, women, and patients who are caregivers (possibly because they are too busy caring for others to care for themselves).

Various factors affect adherence, including forgetfulness, drug interactions or side effects, and the different colors and shapes of pills. The latter can confuse patients because colors and shapes may be different from prescription to prescription even for the same medication, he said.

Dr. Choudhry added that there’s another factor: multiple prescriptions from multiple physicians that require multiple pharmacy visits. His findings suggest that adherence improves when prescriptions are consolidated to limit the need to visit the drugstore. “The chaos of our health care system leads to nonadherence,” he said (Arch Intern Med. 2011;171[9]:814-22).

Internist Lawrence Garber, MD, of Reliant Medical Group in Worcester, Mass., offered these tips about boosting drug adherence:

• Develop trust with patients. “They need to trust that I’m their advocate, and that they’re my No. 1 reason for prescribing the medication, and not making myself more money,” he said.
• Provide educational resources. “We give them resources online. If their EHR [electronic health record] identifies that they’re diabetic, then they get information about diabetes printed out.”
• Use technology to promote messages about diabetes. Dr. Garber said his clinic has installed screens in the examination rooms so that he can show patients their data. “It [makes it] very clear for them to see why what they’re doing now is not working,’’ and why there is a need to change to a different regimen. In addition, screens in the waiting room can display educational slides about diabetes.
• Set up clinic-wide medication protocols. “We’ve set up protocols and pathways for diabetes, hypertension, and high cholesterol to make it easy to prescribe medications that are lower cost and to make sure we’re following the same path,” Dr. Garber said.
• Stay independent. “I haven’t seen a drug rep in decades. It’s an organizational policy that we don’t see them, so we’re less likely to be biased.”
• Make it easier for patients to take medications. Dr. Garber urged colleagues to talk to their patients about using strategies such as printed pill schedules, weekly pill organizers, auto refills, and smartphone alarm reminders to facilitate adherence.

And, he said, you may wish to make it clear that you will check on whether prescriptions are filled. That way, “the patients know that you’re looking,” and it can actually lead to improved adherence.

Dr. Choudhry reported that his research has been funded by unrestricted grants to his institution from insurers, government funders, nonprofit foundations, pharmaceutical companies (including Merck, Sanofi, and Astra Zeneca), and device makers (including Medisafe). Dr. Garber reported no relevant disclosures.

SAN FRANCISCO – Are you having trouble helping patients take their diabetes medications as directed? Try installing 32-inch screens in the examination rooms for a lab result show-and-tell. Keep pharmaceutical marketers out of your hair (and office). Talk about smartphone alarms, promote auto-fill services, and understand why patients don’t adhere to their regimens.

Those are among the suggestions offered by two physicians during a symposium on drug adherence at the annual scientific sessions of the American Diabetes Association.

“Nonadherence is not a case of patients being bad,” said internist and researcher Niteesh K. Choudhry, MD, PhD, of Harvard Medical School and Brigham and Women’s Hospital, Boston. “When half of your patients are nonadherent, I can guarantee you [they] aren’t trying to hurt themselves.”

According to Dr. Choudhry’s own research published in 2011 and based on 2008 data, about 25% of patients do not fill prescriptions after leaving their doctors’ offices. That level for diabetes medications – 42% of patients – is especially high (Am J Med. 2011;124[11]:1081.e9-22).

Other findings, he said, have suggested that half of patients fail to adhere to evidence-based prescribed regimens over the long term. And three groups have especially low levels of adherence: people of color, women, and patients who are caregivers (possibly because they are too busy caring for others to care for themselves).

Various factors affect adherence, including forgetfulness, drug interactions or side effects, and the different colors and shapes of pills. The latter can confuse patients because colors and shapes may be different from prescription to prescription even for the same medication, he said.

Dr. Choudhry added that there’s another factor: multiple prescriptions from multiple physicians that require multiple pharmacy visits. His findings suggest that adherence improves when prescriptions are consolidated to limit the need to visit the drugstore. “The chaos of our health care system leads to nonadherence,” he said (Arch Intern Med. 2011;171[9]:814-22).

Internist Lawrence Garber, MD, of Reliant Medical Group in Worcester, Mass., offered these tips about boosting drug adherence:

• Develop trust with patients. “They need to trust that I’m their advocate, and that they’re my No. 1 reason for prescribing the medication, and not making myself more money,” he said.
• Provide educational resources. “We give them resources online. If their EHR [electronic health record] identifies that they’re diabetic, then they get information about diabetes printed out.”
• Use technology to promote messages about diabetes. Dr. Garber said his clinic has installed screens in the examination rooms so that he can show patients their data. “It [makes it] very clear for them to see why what they’re doing now is not working,’’ and why there is a need to change to a different regimen. In addition, screens in the waiting room can display educational slides about diabetes.
• Set up clinic-wide medication protocols. “We’ve set up protocols and pathways for diabetes, hypertension, and high cholesterol to make it easy to prescribe medications that are lower cost and to make sure we’re following the same path,” Dr. Garber said.
• Stay independent. “I haven’t seen a drug rep in decades. It’s an organizational policy that we don’t see them, so we’re less likely to be biased.”
• Make it easier for patients to take medications. Dr. Garber urged colleagues to talk to their patients about using strategies such as printed pill schedules, weekly pill organizers, auto refills, and smartphone alarm reminders to facilitate adherence.

And, he said, you may wish to make it clear that you will check on whether prescriptions are filled. That way, “the patients know that you’re looking,” and it can actually lead to improved adherence.

Dr. Choudhry reported that his research has been funded by unrestricted grants to his institution from insurers, government funders, nonprofit foundations, pharmaceutical companies (including Merck, Sanofi, and Astra Zeneca), and device makers (including Medisafe). Dr. Garber reported no relevant disclosures.

Testing for targetable alterations in a panel of genes is moderately more cost-effective than testing for single genetic markers in patients with advanced non–small cell lung cancer (NSCLC), finds a retrospective cohort study.

“Targeted therapies are now a therapeutic cornerstone for patients with [advanced NSCLC], but the best diagnostic approach for identifying those who are eligible for treatment remains uncertain,” noted the investigators, led by Lotte Steuten, PhD, Hutchinson Institute for Cancer Outcomes Research, Fred Hutchinson Cancer Research Center, Seattle.

Using the Flatiron Health database, the investigators identified 5,688 patients with stage IIIB or IV NSCLC who were tested for targetable genetic alterations. Overall, 15.4% of the patients had multigene panel sequencing (MGPS) entailing evaluation of at least 30 genes, while the rest had single-marker genetic testing (SMGT) entailing evaluation of markers for epidermal growth factor receptor (EGFR) and anaplastic lymphoma kinase (ALK) or a smaller panel of variants.

Study results, reported in JCO Clinical Cancer Informatics, showed that 22% of the entire study cohort tested positive for EGFR mutations (18.5% with MGPS, 17.3% with SMGT) or ALK mutations (3.59% with MGPS, 3.78% with SMGT). In addition, 8% of those in the MGPS-tested group were found to have BRAF, RET, ROS1, HER2, or MET mutations.

The proportion of patients receiving treatments targeted to the specific mutations was 21% in the MGPS-tested group and 19% in the SMGT-tested group. The patients tested with MGPS had an expected survival that was 0.06 life-years longer (1.20 vs. 1.14) with lifetime total costs that were $8,814 higher per patient ($67,110 vs. $58,297).

Compared with SMGT, MGPS had an incremental cost-effectiveness ratio of $148,478 per life-year gained. This value can be characterized as moderate, given commonly cited threshold values in the United States that range from $50,000 to $200,000 per life-year gained, according to the investigators.

In sensitivity analyses, the expected incremental cost-effectiveness fell (improved) to $110,000 per life-year gained in a scenario in which all patients with an actionable mutation received a targeted treatment.

“Our cost-effectiveness analysis of MGPS versus SMGT provides evidence for health insurers who must consider both value and budget impact when weighing coverage policies for MGPS,” Dr. Steuten and colleagues wrote, noting that such evaluations are limited at present by reliance on retrospective data.

“To reduce decision uncertainty regarding insurance coverage of MGPS, our study highlights the need for prospective studies directly comparing the management of [advanced NSCLC] with MGPS versus SMGT that include both clinical and economic end points,” they concluded. “As this analysis represents a snapshot in time, the model developed should be updated as new clinical or cost information becomes available.”

Dr. Steuten disclosed having a consulting or advisory role with Agendia and Roche (immediate family member), and receiving research funding from Thermo Fisher Scientific, EMD Serono (institutional), Nohla Therapeutics (institutional), and the Personalized Medicine Coalition (institutional), which funded the study.

SOURCE: Steuten L et al. JCO Clin Cancer Inform. 2019 June 3. doi: 10.1200/CCI.19.00002.

Testing for targetable alterations in a panel of genes is moderately more cost-effective than testing for single genetic markers in patients with advanced non–small cell lung cancer (NSCLC), finds a retrospective cohort study.

“Targeted therapies are now a therapeutic cornerstone for patients with [advanced NSCLC], but the best diagnostic approach for identifying those who are eligible for treatment remains uncertain,” noted the investigators, led by Lotte Steuten, PhD, Hutchinson Institute for Cancer Outcomes Research, Fred Hutchinson Cancer Research Center, Seattle.

Using the Flatiron Health database, the investigators identified 5,688 patients with stage IIIB or IV NSCLC who were tested for targetable genetic alterations. Overall, 15.4% of the patients had multigene panel sequencing (MGPS) entailing evaluation of at least 30 genes, while the rest had single-marker genetic testing (SMGT) entailing evaluation of markers for epidermal growth factor receptor (EGFR) and anaplastic lymphoma kinase (ALK) or a smaller panel of variants.

Study results, reported in JCO Clinical Cancer Informatics, showed that 22% of the entire study cohort tested positive for EGFR mutations (18.5% with MGPS, 17.3% with SMGT) or ALK mutations (3.59% with MGPS, 3.78% with SMGT). In addition, 8% of those in the MGPS-tested group were found to have BRAF, RET, ROS1, HER2, or MET mutations.

The proportion of patients receiving treatments targeted to the specific mutations was 21% in the MGPS-tested group and 19% in the SMGT-tested group. The patients tested with MGPS had an expected survival that was 0.06 life-years longer (1.20 vs. 1.14) with lifetime total costs that were $8,814 higher per patient ($67,110 vs. $58,297).

Compared with SMGT, MGPS had an incremental cost-effectiveness ratio of $148,478 per life-year gained. This value can be characterized as moderate, given commonly cited threshold values in the United States that range from $50,000 to $200,000 per life-year gained, according to the investigators.

In sensitivity analyses, the expected incremental cost-effectiveness fell (improved) to $110,000 per life-year gained in a scenario in which all patients with an actionable mutation received a targeted treatment.

“Our cost-effectiveness analysis of MGPS versus SMGT provides evidence for health insurers who must consider both value and budget impact when weighing coverage policies for MGPS,” Dr. Steuten and colleagues wrote, noting that such evaluations are limited at present by reliance on retrospective data.

“To reduce decision uncertainty regarding insurance coverage of MGPS, our study highlights the need for prospective studies directly comparing the management of [advanced NSCLC] with MGPS versus SMGT that include both clinical and economic end points,” they concluded. “As this analysis represents a snapshot in time, the model developed should be updated as new clinical or cost information becomes available.”

Dr. Steuten disclosed having a consulting or advisory role with Agendia and Roche (immediate family member), and receiving research funding from Thermo Fisher Scientific, EMD Serono (institutional), Nohla Therapeutics (institutional), and the Personalized Medicine Coalition (institutional), which funded the study.

SOURCE: Steuten L et al. JCO Clin Cancer Inform. 2019 June 3. doi: 10.1200/CCI.19.00002.

Testing for targetable alterations in a panel of genes is moderately more cost-effective than testing for single genetic markers in patients with advanced non–small cell lung cancer (NSCLC), finds a retrospective cohort study.

“Targeted therapies are now a therapeutic cornerstone for patients with [advanced NSCLC], but the best diagnostic approach for identifying those who are eligible for treatment remains uncertain,” noted the investigators, led by Lotte Steuten, PhD, Hutchinson Institute for Cancer Outcomes Research, Fred Hutchinson Cancer Research Center, Seattle.

Using the Flatiron Health database, the investigators identified 5,688 patients with stage IIIB or IV NSCLC who were tested for targetable genetic alterations. Overall, 15.4% of the patients had multigene panel sequencing (MGPS) entailing evaluation of at least 30 genes, while the rest had single-marker genetic testing (SMGT) entailing evaluation of markers for epidermal growth factor receptor (EGFR) and anaplastic lymphoma kinase (ALK) or a smaller panel of variants.

Study results, reported in JCO Clinical Cancer Informatics, showed that 22% of the entire study cohort tested positive for EGFR mutations (18.5% with MGPS, 17.3% with SMGT) or ALK mutations (3.59% with MGPS, 3.78% with SMGT). In addition, 8% of those in the MGPS-tested group were found to have BRAF, RET, ROS1, HER2, or MET mutations.

The proportion of patients receiving treatments targeted to the specific mutations was 21% in the MGPS-tested group and 19% in the SMGT-tested group. The patients tested with MGPS had an expected survival that was 0.06 life-years longer (1.20 vs. 1.14) with lifetime total costs that were $8,814 higher per patient ($67,110 vs. $58,297).

Compared with SMGT, MGPS had an incremental cost-effectiveness ratio of $148,478 per life-year gained. This value can be characterized as moderate, given commonly cited threshold values in the United States that range from $50,000 to $200,000 per life-year gained, according to the investigators.

In sensitivity analyses, the expected incremental cost-effectiveness fell (improved) to $110,000 per life-year gained in a scenario in which all patients with an actionable mutation received a targeted treatment.

“Our cost-effectiveness analysis of MGPS versus SMGT provides evidence for health insurers who must consider both value and budget impact when weighing coverage policies for MGPS,” Dr. Steuten and colleagues wrote, noting that such evaluations are limited at present by reliance on retrospective data.

“To reduce decision uncertainty regarding insurance coverage of MGPS, our study highlights the need for prospective studies directly comparing the management of [advanced NSCLC] with MGPS versus SMGT that include both clinical and economic end points,” they concluded. “As this analysis represents a snapshot in time, the model developed should be updated as new clinical or cost information becomes available.”

Dr. Steuten disclosed having a consulting or advisory role with Agendia and Roche (immediate family member), and receiving research funding from Thermo Fisher Scientific, EMD Serono (institutional), Nohla Therapeutics (institutional), and the Personalized Medicine Coalition (institutional), which funded the study.

SOURCE: Steuten L et al. JCO Clin Cancer Inform. 2019 June 3. doi: 10.1200/CCI.19.00002.

Thanks to advances in medical science and our understanding of inherited and acquired liver disease, many more children with acquired or congenital liver disease survive into adulthood than they did 2 decades ago. Improvements in immunosuppression and surgery have increased the chances of pediatric liver transplant recipients reaching adulthood, with a survival rate of 75% at 15 to 20 years.¹

With the growing number of adult patients with pediatric-onset liver disease, internists and adult hepatologists need to be aware of these liver diseases and develop expertise to manage this challenging group of patients. Moreover, young adults with pediatric-onset chronic liver disease pose distinct challenges such as pregnancy, adherence to medical regimens, and psychosocial changes in life.

These patients need a “transition of care” rather than a “transfer of care.” Transition of care is a multifaceted process that takes the medical, educational, and psychosocial needs of the patient into consideration before switching their care to adult care physicians, whereas transfer of care is simply an administrative process of change to adult care without previous knowledge of the patients.²

BILIARY ATRESIA

Biliary atresia is a progressive inflammatory fibrosclerosing cholangiopathy of unknown cause. Its prevalence varies with geographic location, ranging from 1 in 6,000 to 1 in 19,000, with the highest prevalence in Taiwan.³

Biliary atresia usually presents within the first few weeks of life, with progressive cholestasis leading to failure to thrive and to fat-soluble vitamin deficiency. Approximately 20% of patients have congenital splenic, gastrointestinal, genitourinary, cardiac, and venous malformations.^4,5 Untreated, biliary atresia progresses to end-stage liver disease and death within 2 years.

The first-line treatment for biliary atresia is to establish biliary outflow with the Kasai procedure (hepatic portoenterostomy), in which a jejunal limb is anastomosed in a Roux-en-Y with the liver. The outcomes of the Kasai procedure depend on the timing of surgery, so timely diagnosis of biliary atresia is crucial. When the Kasai procedure is performed within 60 days of birth, biliary flow is achieved in up to 70% of patients; but if performed after 90 days, biliary flow is achieved in fewer than 25%.⁶

Long-term outcomes of biliary atresia in patients with their native liver have been reported in a few studies.

In a French study,⁷ 743 patients with biliary atresia underwent the Kasai procedure at a median age of 60 days. Survival rates were 57.1% at 2 years, 37.9% at 5 years, 32.4% at 10 years, and 28.5% at 15 years. In other studies,^4–9 the 20-year transplant-free survival rate ranged from 23% to 46%. Therefore, at least one-third of children with biliary atresia survive to adulthood with their native liver.

Implications of biliary atresia in adulthood

Although the Kasai procedure improves biliary outflow, up to 70% of patients develop complications of biliary atresia such as progressive fibrosis, cirrhosis, portal hypertension, cholangitis, and hepatocellular carcinoma, even after a successful Kasai procedure.¹⁰

Portal hypertension with evidence of splenomegaly, thrombocytopenia, or ascites is found in two-thirds of long-term survivors of biliary atresia with a native liver, with variceal hemorrhage occurring in 30%.¹¹ Therefore, patients with biliary atresia who have evidence of portal hypertension should be screened for varices with upper endoscopy on an annual basis. Management of variceal hemorrhage in these patients includes the use of octreotide, antibiotics, variceal ligation, and sclerotherapy; primary prophylaxis can be achieved with beta-blockers and endoscopic variceal ligation.¹²

Cholangitis is frequent, occurring in 40% to 60% of biliary atresia patients after the Kasai procedure, and about one-fourth of these patients have multiple episodes.¹³ The number of episodes of cholangitis negatively affects transplant-free survival.¹⁴ Patients with cholangitis should be adequately treated with oral or intravenous antibiotics depending on the severity of presentation. The role of prophylaxis with antibiotics remains unclear.¹⁵

Pulmonary complications such as hepato­pulmonary syndrome and portopulmonary hypertension can also occur in biliary atresia patients with a native liver. It is important for physicians to be aware of these complications and to screen for them, for example, with agitated saline echocardiography for hepatopulmonary syndrome and with echocardiography for portopulmonary hypertension. Timely screening is crucial, as the outcome of liver transplant depends on the severity at the time of transplant in these conditions, especially portopulmonary hypertension.

Hepatocellular carcinoma has been rarely reported in children with biliary atresia,¹⁶ so well-defined guidelines for screening in young adults with biliary atresia are lacking. Most centers recommend screening with ultrasonography of the abdomen and alpha-fetoprotein measurement every 6 months or annually starting soon after the Kasai procedure, since hepatocellular carcinoma has been reported in children as young as age 2.¹⁶

Transplant. Adult hepatologists are faced with the challenging task of deciding when it is time for transplant, balancing the long-term complications of biliary atresia with the risk of long-term immunosuppression after transplant. In addition, young adults with these complications may have preserved synthetic function, resulting in low Model for End-Stage Liver Disease (MELD) scores, which may complicate the process of listing for transplant.

Neurocognitive deficits are reported in children with biliary atresia,¹⁷ but young adults with biliary atresia generally have reasonable cognitive function and prospects for education and employment.

Pregnancy with successful outcomes has been reported.⁸

Alagille syndrome is an autosomal-dominant multisystemic disease caused by mutations in the JAG1 gene (accounting for > 95% of cases) and the NOTCH2 gene, with highly variable expression.¹⁸

Extrahepatic manifestations include butterfly vertebral defects, facial dysmorphism (eg, deep-set and low-set eyes, with characteristic “triangular” facies), posterior embryotoxon (a congenital defect of the eye characterized by an opaque ring around the margin of the cornea), peripheral pulmonary stenosis, renal abnormalities, and vascular malformations.

Hepatic manifestations vary from asymptomatic laboratory abnormalities to progressive cholestasis starting in early infancy with intractable pruritus, xanthomas, failure to thrive, and end-stage liver disease requiring liver transplant in childhood in 15% to 20% of patients.¹⁹

Implications of Alagille syndrome in adulthood

Transplant. Interestingly, the phenotype of hepatic disease is already established in childhood, with minimal or no progression in adulthood. Most children with minimal liver disease experience spontaneous resolution, whereas those with significant cholestasis might ultimately develop progressive liver fibrosis or cirrhosis requiring liver transplant in childhood. Only a small subset of children with minimal cholestasis progress to end-stage liver disease in late childhood or early adulthood.²⁰ Therefore, liver transplant for progressive liver disease from significant cholestasis almost always occurs in childhood, usually between ages 1 and 4.²¹

In a retrospective study comparing posttransplant outcomes in children with Alagille syndrome and biliary atresia, 1-year patient survival was excellent overall in children with Alagille syndrome, although slightly lower than in children with biliary atresia, most likely owing to extrahepatic morbidities of Alagille syndrome and especially the use of immunosuppression in those with renal disease.²¹ Similarly, 1- and 5-year patient and graft survival outcomes of liver transplant in adults with Alagille syndrome were also excellent compared with those who received a liver transplant in childhood for Alagille syndrome or in adulthood for biliary atresia.²²

Hepatocellular carcinoma has occurred in these patients in the absence of cirrhosis, which makes implementation of prognostic and surveillance strategies almost impossible to design for them. Annual ultrasonography with alpha-fetoprotein testing might be applicable in Alagille syndrome patients. However, deciding which patients should undergo this testing and when it should start will be challenging, given the paucity of data.

Cardiovascular disease. Cardiac phenotype is also mostly established in childhood, with the pulmonary vasculature being most commonly involved.¹⁹ In contrast, renal and other vascular abnormalities can manifest in adulthood. Renal manifestations vary and include structural anomalies such as hyperechoic kidneys or renal cysts, which can manifest in childhood, and some abnormalities such as hypertension and renal artery stenosis that can manifest in adulthood.^23,24

Vasculopathy is reported to involve the intracranial, renal, and intra-abdominal blood vessels.²⁵ Neurovascular accidents such as stroke and intracranial hemorrhage can occur at any age, with significant rates of morbidity and death.²⁶ Therefore, some experts recommend magnetic resonance angiography every 5 years and before any major intervention to prevent these devastating complications.²⁰

Pregnancy. Successful pregnancies have been reported. Preexisting cardiac and hepatic disease can complicate pregnancy depending on the severity of the disease. Because of the autosomal-dominant pattern of inheritance, infants have a 50% risk of the disease, so genetic counseling should be seriously considered before conception.²⁷ Prenatal diagnosis is possible, but the lack of genotype-phenotype correlation precludes its use in clinical practice.

PROGRESSIVE FAMILIAL INTRAHEPATIC CHOLESTASIS

Progressive familial intrahepatic cholestasis (PFIC) is a heterogeneous group of autosomal-recessive conditions associated with disruption of bile formation causing cholestatic liver disease in infants and young children. Three types have been described, depending on the genetic mutation in the hepatobiliary transport pathway:

• PFIC 1 (Byler disease) is caused by impaired bile salt secretion due to mutations in the ATP8B1 gene encoding for the familial intrahepatic cholestasis 1 (FIC 1) protein
• PFIC 2 is caused by impaired bile salt secretion due to mutations in the ABCB11 gene encoding for the bile salt export pump (BSEP) protein
• PFIC 3 is caused by impaired biliary phospholipid secretion due to a defect in ABCB4 encoding for multidrug resistance 3 (MDR3) protein.²⁸

PFIC 1 and 2 manifest with low gamma-glutamyl transferase (GGT) cholestasis, whereas PFIC 3 presents with high GGT cholestasis.

PFIC 1 and PFIC 2 usually cause cholestasis in early infancy, but PFIC 3 can cause cholestasis in late infancy, childhood, and even adulthood.

Because ATP8B1 is expressed in other tissues, PFIC 1 is characterized by extrahepatic manifestations such as sensorineural hearing loss, growth failure, severe diarrhea, and pancreatic insufficiency.

PFIC 1 and 2 (low-GGT cholestasis) are usually progressive and often lead to end-stage liver disease and cirrhosis before adulthood. Therefore, almost all patients with PFIC 1 and 2 undergo liver transplant or at least a biliary diversion procedure before reaching adulthood. Intractable pruritus is one of the most challenging clinical manifestations in patients with PFIC.

First-line management is pharmacologic and includes ursodeoxycholic acid, antihistamines (eg, hydroxyzine), bile acid sequestrants (eg, cholestyramine, colestipol), naltrexone, and rifampin, but these have limited efficacy.¹⁰

Most patients, especially those with PFIC 1 and 2, undergo a biliary diversion procedure such as partial external biliary diversion (cholecystojejunocutaneostomy), ileal exclusion, or partial internal biliary diversion (cholecystojejunocolic anastomosis) to decrease enterohepatic circulation of bile salts. The efficacy of these procedures is very limited in patients with established cirrhosis. Excessive losses of bile can occur through the biliary stoma, leading to dehydration in patients with external biliary diversion. In patients who are not candidates for biliary diversion, endoscopic nasobiliary drainage of pancreatobiliary secretions could be achieved by placing a catheter in the common bile duct; this has been reported to be effective in relieving cholestasis in a few cases.²⁹

Liver transplant is needed in patients with progressive liver disease and intractable pruritus despite medical management and biliary diversion. Unlike in biliary atresia, liver transplant is not curative in PFIC 1, due to extrahepatic manifestations: patients with PFIC 1 can still have intractable diarrhea and pancreatitis after liver transplant. More importantly, allograft steatohepatitis with further progression to cirrhosis can occur after liver transplant in patients with PFIC 1. Interestingly, biliary diversion has been reported to improve graft steatosis and diarrhea after liver transplant.³⁰

Although graft survival after transplant is good in patients with PFIC 2, recurrence of low-GGT cholestasis has been reported and is believed to be due to the formation of anti-bile salt export pump (anti-BSEP) antibodies by the host immune system in response to exposure to new proteins from the transplant graft.³¹

Cancer. The risk of malignancy, especially hepatocellular carcinoma, is also increased in PFIC 2, affecting nearly 15% of patients. Therefore, standard hepatocellular carcinoma surveillance with ultrasonography or alpha-fetoprotein testing or both is recommended in patients with PFIC 2. Cholangiocarcinoma and pancreatic adenocarcinoma have also been reported in patients with PFIC 2.²⁰

Incomplete penetrance of mutations in ATP8B1 and ABCB11 can cause recurrent episodes of cholestasis and pruritus with asymptomatic periods between episodes, referred to as benign recurrent intrahepatic cholestasis. Prognosis is usually good, with no progression to cirrhosis.³²

Pregnancy. In contrast to FIC 1 and BSEP deficiency, MDR3 defects lead to a wide phenotypic spectrum depending on the type of mutation. Heterozygous mutation is associated with increased risk of development of cholestasis during pregnancy, which typically presents with generalized pruritus in the third trimester and is associated with adverse fetal outcomes. Intrahepatic cholestasis of pregnancy is usually treated with ursodeoxycholic acid, with reported improvement in pruritus, liver function, and pregnancy outcomes.³³

In adults, drug-induced liver injury and idiopathic cirrhosis have also been described with MDR3 defects. Intrahepatic lithiasis and cholesterol gallstones can also occur with MDR3 defects as a result of impaired secretion of biliary phospholipid.³² Despite intrahepatic cholestasis of pregnancy, successful outcomes have been reported in women with PFIC.²⁰

OTHER CHILDHOOD-ONSET INHERITED CHOLESTATIC DISEASES

Cystic fibrosis-associated liver disease

Nearly 40% of patients with cystic fibrosis develop liver disease.³⁴ Cystic fibrosis-associated liver disease encompasses a broad clinical spectrum including asymptomatic elevation of aminotransferases, neonatal cholestasis, hepatic steatosis, focal biliary cirrhosis, and multilobar cirrhosis. Cirrhosis and portal hypertension can occur in 5% to 10% of patients and is the third-leading cause of death in patients with cystic fibrosis.³⁵

Risk factors for cystic fibrosis-associated liver disease include male sex, meconium ileus, and severe CFTR gene mutation (class I–III) with pancreatic insufficiency. Cystic fibrosis-related cirrhosis is more frequent in children and adolescents, whereas noncirrhotic portal hypertension and intrahepatic cholangiopathies are more common in adults.³⁶

Limited available studies support treatment with ursodeoxycholic acid in patients with cholestasis to delay the progression of liver disease, but the impact of this drug on long-term outcome is unknown.²⁹

Most patients remain in compensated cirrhosis for many years before progressing to decompensated cirrhosis requiring liver transplant. Other indications for liver transplant include recurrent intractable variceal bleeding, hepatopulmonary syndrome, and portopulmonary hypertension. Combined liver and lung transplant may be considered in patients with advanced liver and lung disease. Outcomes after isolated liver or liver-lung transplant in cystic fibrosis patients have been comparable to those in patients with other liver diseases.³⁷

Defects in bile acid synthesis

Inherited defects of enzymes required for the synthesis of primary bile acids from cholesterol can cause cholestasis from impaired bile flow and production of hepatotoxic aberrant bile acids. The clinical presentation varies depending on the enzymatic defect and can range from liver disease of varying severity to neurologic manifestations. Idiopathic late-onset cholestasis and cirrhosis of unknown etiology have been reported in adults with bile acid synthesis defects.^38,39 Therefore, this diagnosis should be considered in cases of cryptogenic cirrhosis and other cholestatic features.

Treatment with primary bile acids (cholic acid) has been effective in most patients with defective bile acid synthesis.

Primary sclerosing cholangitis

Primary sclerosing cholangitis is characterized by progressive obliteration of intrahepatic and extrahepatic bile ducts and is most commonly seen in patients with inflammatory bowel disease. Sclerosing cholangitis can also be secondary to other diseases in children such as immunodeficiency syndromes, Langerhans cell histiocytosis, cystic fibrosis, or sickle cell anemia.⁴⁰ Neonatal sclerosing cholangitis is a rare autosomal-recessive disease characterized by a severe form of cholangiopathy in neonates and young infants requiring transplant. It can be associated with Kabuki syndrome and neonatal ichthyosis-sclerosing cholangitis syndrome.

Treatment options are limited. Ursodeoxycholic acid and oral vancomycin have variable efficacy. Liver transplant is needed in patients with decompensated cirrhosis. Patients with primary sclerosing cholangitis, especially adults, are at higher risk of developing cholangiocarcinoma, and therefore screening with ultrasonography or magnetic resonance imaging every 6 to 12 months is recommended.

The risk of preterm and cesarean deliveries may be elevated in women with primary sclerosing cholangitis, though data are limited.³³

Adolescent rebellion poses risks

Outcomes of liver transplant in children and adolescents have improved tremendously in the past 2 decades with advances in surgical techniques, pre- and postoperative management, organ preservation, and immunosuppression. Now, most pediatric liver transplant recipients survive into adulthood, creating a unique challenge for internists and adult  care hepatologists.⁴¹

In rebellious adolescents and young adults, risk-taking behavior, nonadherence to immunosuppressive medications, alcohol intake, and substance abuse increase the risk of graft rejection and loss. Current immunosuppressive drugs such as calcineurin inhibitors (tacrolimus, cyclosporine), mycophenolate mofetil, sirolimus, and corticosteroids have drastically decreased rejection rates in compliant patients.⁴¹ Educating patients on the importance of taking their medications and avoiding alcohol and drug abuse is especially important for adolescents and young adults, as rates of nonadherence are high in these age groups.

Although pregnancy is usually successful after liver transplant, it should be considered high-risk due to reported complications such as graft rejection, diabetes, preeclampsia, sepsis, prematurity, and low birth weight. Conception should be avoided for at least 1 year after transplant.⁴² Appropriate counseling with regard to pregnancy and contraception is important.

There is no consensus on breastfeeding, but it is considered safe in women on low-dose calcineurin inhibitors.⁴³

Life is better with a new liver, but patients have special needs

Liver transplant is life-saving and improves quality of life. However, long-term pediatric liver transplant recipients face challenges such as strict adherence to medications and follow-up visits, avoiding exposure to infections, and fear of graft rejection.

Chronic liver disease in children leads to failure to thrive, growth failure, and even delayed puberty, which resolve in most patients after liver transplant before adulthood in the absence of other comorbidities.⁴⁴ However, these patients are reported to have lower psychosocial functioning and more psychiatric disorders such as anxiety or posttraumatic disorder.^41,44

Therefore, a psychologist or other mental health professional should be part of the management team from the time of pretransplant assessment to identify mental health problems and the need for adjustments before liver transplant. Ongoing psychosocial assessment after liver transplant is equally important to identify risks such as drug or alcohol abuse, depression, posttraumatic stress disorder, and medication nonadherence, all of which can negatively affect posttransplant outcome.⁴⁵

In addition, assessment of family functioning and structure is important for good long-term outcomes posttransplant; therefore, a social worker should also be a part of the transplant team. Psyschosocial assessment tools can identify high-risk candidates who would benefit from earlier intervention to avoid any negative impact posttransplant.

Neurocognitive development can be delayed in children with chronic liver disease, and the delay may persist even after liver transplant, with reported impairments in intellectual ability, language, verbal, and visuospatial functioning skills.⁴¹ In spite of this, a recent study found that more than half the study patients were employed at a median follow-up of 24 years from liver transplant and a median age of 27.⁴⁶

Remarkably, pediatric liver transplant recipients have reported quality of life comparable to that in the general population,⁴⁷ and even better than in patients with other chronic illnesses.⁴⁸

Long-term medical comorbidities in pediatric liver transplant recipients

Favorable outcomes such as long-term survival and good quality of life in pediatric liver transplant recipients are lessened by late complications such as portal vein thrombosis or biliary strictures needing interventions, chronic graft rejection, adverse effects of immunosuppression, and recurrence of the disease.

Split-liver transplant—splitting a deceased-donor allograft to provide grafts for 2 recipients—has revolutionized liver transplant by increasing the donor pool and thereby decreasing waitlist mortality rates, especially in pediatric candidates. Despite this advantage, split-liver transplant is technically challenging and associated with increased perioperative complications compared with whole-liver transplant, especially in adult recipients. Recently, experienced centers have reported favorable outcomes with split-liver transplant comparable to those with whole-liver transplant; therefore, split-liver transplant should be considered after careful evaluation of donor organ and recipient clinical status.⁴⁹

Old age in the recipient can also adversely affect liver transplant outcomes.⁵⁰

Interestingly, even in patients whose clinical course is unremarkable and biochemical values are normal, graft hepatitis or fibrosis of unknown cause with progression to cirrhosis has been described in the decade after transplant.⁴¹

Chronic rejection with eventual graft loss may be related to nonadherence in adolescents and can be reduced with use of an additional immunosuppressant such as sirolimus or mycophenolate. Chronic kidney disease can occur in about one-third of liver transplant recipients secondary to renal disease associated with primary disease (like Alagille syndrome), hepatorenal syndrome, and most importantly, use of calcineurin inhibitors.⁴⁵

Components of the metabolic syndrome such as type 2 diabetes, obesity, nonalcoholic fatty liver disease, hypertension, and dyslipidemia are also seen in long-term pediatric liver transplant survivors. Internists are advised to screen for these comorbidities so that interventions can be applied early to improve long-term health outcomes and graft survival.

Of importance, multiple studies have shown a 2-fold increase in the rates of de novo malignancy in liver transplant recipients, including solid-organ and lymphoproliferative cancers, probably due to long-term immunosuppression. Posttransplant lymphoproliferative disorder occurs at lower rates than with other solid-organ transplants; its incidence is greatest in pediatric patients and in the first 12 to 18 months after transplant.⁵¹

While the number of patients with childhood-onset liver disease and pediatric liver transplant recipients who survive into adulthood is increasing, there are no established guidelines or formal models for transitioning these patients into adult care. Consequently, studies on transitional process have examined various issues such as patient and parent frustration, poor medical knowledge among patients during transition, lack of parental facilitation, and inadequate knowledge on disease process among adult-care hepatologists.^52–54

A prolonged period of transition up to age 25 is preferred in complicated cases. Distinctive consideration for transition should include those with neurocognitive developmental delay from underlying disease or hepatic encephalopathy before transplant. These patients need additional support and time to achieve independence in health management before transition.⁵⁷ Validated questionnaires are available to assess readiness to transition into adult care,⁵⁸ implying that the decision to transition should not be based solely on age. 

Thanks to advances in medical science and our understanding of inherited and acquired liver disease, many more children with acquired or congenital liver disease survive into adulthood than they did 2 decades ago. Improvements in immunosuppression and surgery have increased the chances of pediatric liver transplant recipients reaching adulthood, with a survival rate of 75% at 15 to 20 years.¹

With the growing number of adult patients with pediatric-onset liver disease, internists and adult hepatologists need to be aware of these liver diseases and develop expertise to manage this challenging group of patients. Moreover, young adults with pediatric-onset chronic liver disease pose distinct challenges such as pregnancy, adherence to medical regimens, and psychosocial changes in life.

These patients need a “transition of care” rather than a “transfer of care.” Transition of care is a multifaceted process that takes the medical, educational, and psychosocial needs of the patient into consideration before switching their care to adult care physicians, whereas transfer of care is simply an administrative process of change to adult care without previous knowledge of the patients.²

BILIARY ATRESIA

Biliary atresia is a progressive inflammatory fibrosclerosing cholangiopathy of unknown cause. Its prevalence varies with geographic location, ranging from 1 in 6,000 to 1 in 19,000, with the highest prevalence in Taiwan.³

Biliary atresia usually presents within the first few weeks of life, with progressive cholestasis leading to failure to thrive and to fat-soluble vitamin deficiency. Approximately 20% of patients have congenital splenic, gastrointestinal, genitourinary, cardiac, and venous malformations.^4,5 Untreated, biliary atresia progresses to end-stage liver disease and death within 2 years.

The first-line treatment for biliary atresia is to establish biliary outflow with the Kasai procedure (hepatic portoenterostomy), in which a jejunal limb is anastomosed in a Roux-en-Y with the liver. The outcomes of the Kasai procedure depend on the timing of surgery, so timely diagnosis of biliary atresia is crucial. When the Kasai procedure is performed within 60 days of birth, biliary flow is achieved in up to 70% of patients; but if performed after 90 days, biliary flow is achieved in fewer than 25%.⁶

Long-term outcomes of biliary atresia in patients with their native liver have been reported in a few studies.

In a French study,⁷ 743 patients with biliary atresia underwent the Kasai procedure at a median age of 60 days. Survival rates were 57.1% at 2 years, 37.9% at 5 years, 32.4% at 10 years, and 28.5% at 15 years. In other studies,^4–9 the 20-year transplant-free survival rate ranged from 23% to 46%. Therefore, at least one-third of children with biliary atresia survive to adulthood with their native liver.

Implications of biliary atresia in adulthood

Although the Kasai procedure improves biliary outflow, up to 70% of patients develop complications of biliary atresia such as progressive fibrosis, cirrhosis, portal hypertension, cholangitis, and hepatocellular carcinoma, even after a successful Kasai procedure.¹⁰

Portal hypertension with evidence of splenomegaly, thrombocytopenia, or ascites is found in two-thirds of long-term survivors of biliary atresia with a native liver, with variceal hemorrhage occurring in 30%.¹¹ Therefore, patients with biliary atresia who have evidence of portal hypertension should be screened for varices with upper endoscopy on an annual basis. Management of variceal hemorrhage in these patients includes the use of octreotide, antibiotics, variceal ligation, and sclerotherapy; primary prophylaxis can be achieved with beta-blockers and endoscopic variceal ligation.¹²

Cholangitis is frequent, occurring in 40% to 60% of biliary atresia patients after the Kasai procedure, and about one-fourth of these patients have multiple episodes.¹³ The number of episodes of cholangitis negatively affects transplant-free survival.¹⁴ Patients with cholangitis should be adequately treated with oral or intravenous antibiotics depending on the severity of presentation. The role of prophylaxis with antibiotics remains unclear.¹⁵

Pulmonary complications such as hepato­pulmonary syndrome and portopulmonary hypertension can also occur in biliary atresia patients with a native liver. It is important for physicians to be aware of these complications and to screen for them, for example, with agitated saline echocardiography for hepatopulmonary syndrome and with echocardiography for portopulmonary hypertension. Timely screening is crucial, as the outcome of liver transplant depends on the severity at the time of transplant in these conditions, especially portopulmonary hypertension.

Hepatocellular carcinoma has been rarely reported in children with biliary atresia,¹⁶ so well-defined guidelines for screening in young adults with biliary atresia are lacking. Most centers recommend screening with ultrasonography of the abdomen and alpha-fetoprotein measurement every 6 months or annually starting soon after the Kasai procedure, since hepatocellular carcinoma has been reported in children as young as age 2.¹⁶

Transplant. Adult hepatologists are faced with the challenging task of deciding when it is time for transplant, balancing the long-term complications of biliary atresia with the risk of long-term immunosuppression after transplant. In addition, young adults with these complications may have preserved synthetic function, resulting in low Model for End-Stage Liver Disease (MELD) scores, which may complicate the process of listing for transplant.

Neurocognitive deficits are reported in children with biliary atresia,¹⁷ but young adults with biliary atresia generally have reasonable cognitive function and prospects for education and employment.

Pregnancy with successful outcomes has been reported.⁸

Alagille syndrome is an autosomal-dominant multisystemic disease caused by mutations in the JAG1 gene (accounting for > 95% of cases) and the NOTCH2 gene, with highly variable expression.¹⁸

Extrahepatic manifestations include butterfly vertebral defects, facial dysmorphism (eg, deep-set and low-set eyes, with characteristic “triangular” facies), posterior embryotoxon (a congenital defect of the eye characterized by an opaque ring around the margin of the cornea), peripheral pulmonary stenosis, renal abnormalities, and vascular malformations.

Hepatic manifestations vary from asymptomatic laboratory abnormalities to progressive cholestasis starting in early infancy with intractable pruritus, xanthomas, failure to thrive, and end-stage liver disease requiring liver transplant in childhood in 15% to 20% of patients.¹⁹

Implications of Alagille syndrome in adulthood

Transplant. Interestingly, the phenotype of hepatic disease is already established in childhood, with minimal or no progression in adulthood. Most children with minimal liver disease experience spontaneous resolution, whereas those with significant cholestasis might ultimately develop progressive liver fibrosis or cirrhosis requiring liver transplant in childhood. Only a small subset of children with minimal cholestasis progress to end-stage liver disease in late childhood or early adulthood.²⁰ Therefore, liver transplant for progressive liver disease from significant cholestasis almost always occurs in childhood, usually between ages 1 and 4.²¹

In a retrospective study comparing posttransplant outcomes in children with Alagille syndrome and biliary atresia, 1-year patient survival was excellent overall in children with Alagille syndrome, although slightly lower than in children with biliary atresia, most likely owing to extrahepatic morbidities of Alagille syndrome and especially the use of immunosuppression in those with renal disease.²¹ Similarly, 1- and 5-year patient and graft survival outcomes of liver transplant in adults with Alagille syndrome were also excellent compared with those who received a liver transplant in childhood for Alagille syndrome or in adulthood for biliary atresia.²²

Hepatocellular carcinoma has occurred in these patients in the absence of cirrhosis, which makes implementation of prognostic and surveillance strategies almost impossible to design for them. Annual ultrasonography with alpha-fetoprotein testing might be applicable in Alagille syndrome patients. However, deciding which patients should undergo this testing and when it should start will be challenging, given the paucity of data.

Cardiovascular disease. Cardiac phenotype is also mostly established in childhood, with the pulmonary vasculature being most commonly involved.¹⁹ In contrast, renal and other vascular abnormalities can manifest in adulthood. Renal manifestations vary and include structural anomalies such as hyperechoic kidneys or renal cysts, which can manifest in childhood, and some abnormalities such as hypertension and renal artery stenosis that can manifest in adulthood.^23,24

Vasculopathy is reported to involve the intracranial, renal, and intra-abdominal blood vessels.²⁵ Neurovascular accidents such as stroke and intracranial hemorrhage can occur at any age, with significant rates of morbidity and death.²⁶ Therefore, some experts recommend magnetic resonance angiography every 5 years and before any major intervention to prevent these devastating complications.²⁰

Pregnancy. Successful pregnancies have been reported. Preexisting cardiac and hepatic disease can complicate pregnancy depending on the severity of the disease. Because of the autosomal-dominant pattern of inheritance, infants have a 50% risk of the disease, so genetic counseling should be seriously considered before conception.²⁷ Prenatal diagnosis is possible, but the lack of genotype-phenotype correlation precludes its use in clinical practice.

PROGRESSIVE FAMILIAL INTRAHEPATIC CHOLESTASIS

Progressive familial intrahepatic cholestasis (PFIC) is a heterogeneous group of autosomal-recessive conditions associated with disruption of bile formation causing cholestatic liver disease in infants and young children. Three types have been described, depending on the genetic mutation in the hepatobiliary transport pathway:

• PFIC 1 (Byler disease) is caused by impaired bile salt secretion due to mutations in the ATP8B1 gene encoding for the familial intrahepatic cholestasis 1 (FIC 1) protein
• PFIC 2 is caused by impaired bile salt secretion due to mutations in the ABCB11 gene encoding for the bile salt export pump (BSEP) protein
• PFIC 3 is caused by impaired biliary phospholipid secretion due to a defect in ABCB4 encoding for multidrug resistance 3 (MDR3) protein.²⁸

PFIC 1 and 2 manifest with low gamma-glutamyl transferase (GGT) cholestasis, whereas PFIC 3 presents with high GGT cholestasis.

PFIC 1 and PFIC 2 usually cause cholestasis in early infancy, but PFIC 3 can cause cholestasis in late infancy, childhood, and even adulthood.

Because ATP8B1 is expressed in other tissues, PFIC 1 is characterized by extrahepatic manifestations such as sensorineural hearing loss, growth failure, severe diarrhea, and pancreatic insufficiency.

PFIC 1 and 2 (low-GGT cholestasis) are usually progressive and often lead to end-stage liver disease and cirrhosis before adulthood. Therefore, almost all patients with PFIC 1 and 2 undergo liver transplant or at least a biliary diversion procedure before reaching adulthood. Intractable pruritus is one of the most challenging clinical manifestations in patients with PFIC.

First-line management is pharmacologic and includes ursodeoxycholic acid, antihistamines (eg, hydroxyzine), bile acid sequestrants (eg, cholestyramine, colestipol), naltrexone, and rifampin, but these have limited efficacy.¹⁰

Most patients, especially those with PFIC 1 and 2, undergo a biliary diversion procedure such as partial external biliary diversion (cholecystojejunocutaneostomy), ileal exclusion, or partial internal biliary diversion (cholecystojejunocolic anastomosis) to decrease enterohepatic circulation of bile salts. The efficacy of these procedures is very limited in patients with established cirrhosis. Excessive losses of bile can occur through the biliary stoma, leading to dehydration in patients with external biliary diversion. In patients who are not candidates for biliary diversion, endoscopic nasobiliary drainage of pancreatobiliary secretions could be achieved by placing a catheter in the common bile duct; this has been reported to be effective in relieving cholestasis in a few cases.²⁹

Liver transplant is needed in patients with progressive liver disease and intractable pruritus despite medical management and biliary diversion. Unlike in biliary atresia, liver transplant is not curative in PFIC 1, due to extrahepatic manifestations: patients with PFIC 1 can still have intractable diarrhea and pancreatitis after liver transplant. More importantly, allograft steatohepatitis with further progression to cirrhosis can occur after liver transplant in patients with PFIC 1. Interestingly, biliary diversion has been reported to improve graft steatosis and diarrhea after liver transplant.³⁰

Although graft survival after transplant is good in patients with PFIC 2, recurrence of low-GGT cholestasis has been reported and is believed to be due to the formation of anti-bile salt export pump (anti-BSEP) antibodies by the host immune system in response to exposure to new proteins from the transplant graft.³¹

Cancer. The risk of malignancy, especially hepatocellular carcinoma, is also increased in PFIC 2, affecting nearly 15% of patients. Therefore, standard hepatocellular carcinoma surveillance with ultrasonography or alpha-fetoprotein testing or both is recommended in patients with PFIC 2. Cholangiocarcinoma and pancreatic adenocarcinoma have also been reported in patients with PFIC 2.²⁰

Incomplete penetrance of mutations in ATP8B1 and ABCB11 can cause recurrent episodes of cholestasis and pruritus with asymptomatic periods between episodes, referred to as benign recurrent intrahepatic cholestasis. Prognosis is usually good, with no progression to cirrhosis.³²

Pregnancy. In contrast to FIC 1 and BSEP deficiency, MDR3 defects lead to a wide phenotypic spectrum depending on the type of mutation. Heterozygous mutation is associated with increased risk of development of cholestasis during pregnancy, which typically presents with generalized pruritus in the third trimester and is associated with adverse fetal outcomes. Intrahepatic cholestasis of pregnancy is usually treated with ursodeoxycholic acid, with reported improvement in pruritus, liver function, and pregnancy outcomes.³³

In adults, drug-induced liver injury and idiopathic cirrhosis have also been described with MDR3 defects. Intrahepatic lithiasis and cholesterol gallstones can also occur with MDR3 defects as a result of impaired secretion of biliary phospholipid.³² Despite intrahepatic cholestasis of pregnancy, successful outcomes have been reported in women with PFIC.²⁰

OTHER CHILDHOOD-ONSET INHERITED CHOLESTATIC DISEASES

Cystic fibrosis-associated liver disease

Nearly 40% of patients with cystic fibrosis develop liver disease.³⁴ Cystic fibrosis-associated liver disease encompasses a broad clinical spectrum including asymptomatic elevation of aminotransferases, neonatal cholestasis, hepatic steatosis, focal biliary cirrhosis, and multilobar cirrhosis. Cirrhosis and portal hypertension can occur in 5% to 10% of patients and is the third-leading cause of death in patients with cystic fibrosis.³⁵

Risk factors for cystic fibrosis-associated liver disease include male sex, meconium ileus, and severe CFTR gene mutation (class I–III) with pancreatic insufficiency. Cystic fibrosis-related cirrhosis is more frequent in children and adolescents, whereas noncirrhotic portal hypertension and intrahepatic cholangiopathies are more common in adults.³⁶

Limited available studies support treatment with ursodeoxycholic acid in patients with cholestasis to delay the progression of liver disease, but the impact of this drug on long-term outcome is unknown.²⁹

Most patients remain in compensated cirrhosis for many years before progressing to decompensated cirrhosis requiring liver transplant. Other indications for liver transplant include recurrent intractable variceal bleeding, hepatopulmonary syndrome, and portopulmonary hypertension. Combined liver and lung transplant may be considered in patients with advanced liver and lung disease. Outcomes after isolated liver or liver-lung transplant in cystic fibrosis patients have been comparable to those in patients with other liver diseases.³⁷

Defects in bile acid synthesis

Inherited defects of enzymes required for the synthesis of primary bile acids from cholesterol can cause cholestasis from impaired bile flow and production of hepatotoxic aberrant bile acids. The clinical presentation varies depending on the enzymatic defect and can range from liver disease of varying severity to neurologic manifestations. Idiopathic late-onset cholestasis and cirrhosis of unknown etiology have been reported in adults with bile acid synthesis defects.^38,39 Therefore, this diagnosis should be considered in cases of cryptogenic cirrhosis and other cholestatic features.

Treatment with primary bile acids (cholic acid) has been effective in most patients with defective bile acid synthesis.

Primary sclerosing cholangitis

Primary sclerosing cholangitis is characterized by progressive obliteration of intrahepatic and extrahepatic bile ducts and is most commonly seen in patients with inflammatory bowel disease. Sclerosing cholangitis can also be secondary to other diseases in children such as immunodeficiency syndromes, Langerhans cell histiocytosis, cystic fibrosis, or sickle cell anemia.⁴⁰ Neonatal sclerosing cholangitis is a rare autosomal-recessive disease characterized by a severe form of cholangiopathy in neonates and young infants requiring transplant. It can be associated with Kabuki syndrome and neonatal ichthyosis-sclerosing cholangitis syndrome.

Treatment options are limited. Ursodeoxycholic acid and oral vancomycin have variable efficacy. Liver transplant is needed in patients with decompensated cirrhosis. Patients with primary sclerosing cholangitis, especially adults, are at higher risk of developing cholangiocarcinoma, and therefore screening with ultrasonography or magnetic resonance imaging every 6 to 12 months is recommended.

The risk of preterm and cesarean deliveries may be elevated in women with primary sclerosing cholangitis, though data are limited.³³

Adolescent rebellion poses risks

Outcomes of liver transplant in children and adolescents have improved tremendously in the past 2 decades with advances in surgical techniques, pre- and postoperative management, organ preservation, and immunosuppression. Now, most pediatric liver transplant recipients survive into adulthood, creating a unique challenge for internists and adult  care hepatologists.⁴¹

In rebellious adolescents and young adults, risk-taking behavior, nonadherence to immunosuppressive medications, alcohol intake, and substance abuse increase the risk of graft rejection and loss. Current immunosuppressive drugs such as calcineurin inhibitors (tacrolimus, cyclosporine), mycophenolate mofetil, sirolimus, and corticosteroids have drastically decreased rejection rates in compliant patients.⁴¹ Educating patients on the importance of taking their medications and avoiding alcohol and drug abuse is especially important for adolescents and young adults, as rates of nonadherence are high in these age groups.

Although pregnancy is usually successful after liver transplant, it should be considered high-risk due to reported complications such as graft rejection, diabetes, preeclampsia, sepsis, prematurity, and low birth weight. Conception should be avoided for at least 1 year after transplant.⁴² Appropriate counseling with regard to pregnancy and contraception is important.

There is no consensus on breastfeeding, but it is considered safe in women on low-dose calcineurin inhibitors.⁴³

Life is better with a new liver, but patients have special needs

Liver transplant is life-saving and improves quality of life. However, long-term pediatric liver transplant recipients face challenges such as strict adherence to medications and follow-up visits, avoiding exposure to infections, and fear of graft rejection.

Chronic liver disease in children leads to failure to thrive, growth failure, and even delayed puberty, which resolve in most patients after liver transplant before adulthood in the absence of other comorbidities.⁴⁴ However, these patients are reported to have lower psychosocial functioning and more psychiatric disorders such as anxiety or posttraumatic disorder.^41,44

Therefore, a psychologist or other mental health professional should be part of the management team from the time of pretransplant assessment to identify mental health problems and the need for adjustments before liver transplant. Ongoing psychosocial assessment after liver transplant is equally important to identify risks such as drug or alcohol abuse, depression, posttraumatic stress disorder, and medication nonadherence, all of which can negatively affect posttransplant outcome.⁴⁵

In addition, assessment of family functioning and structure is important for good long-term outcomes posttransplant; therefore, a social worker should also be a part of the transplant team. Psyschosocial assessment tools can identify high-risk candidates who would benefit from earlier intervention to avoid any negative impact posttransplant.

Neurocognitive development can be delayed in children with chronic liver disease, and the delay may persist even after liver transplant, with reported impairments in intellectual ability, language, verbal, and visuospatial functioning skills.⁴¹ In spite of this, a recent study found that more than half the study patients were employed at a median follow-up of 24 years from liver transplant and a median age of 27.⁴⁶

Remarkably, pediatric liver transplant recipients have reported quality of life comparable to that in the general population,⁴⁷ and even better than in patients with other chronic illnesses.⁴⁸

Long-term medical comorbidities in pediatric liver transplant recipients

Favorable outcomes such as long-term survival and good quality of life in pediatric liver transplant recipients are lessened by late complications such as portal vein thrombosis or biliary strictures needing interventions, chronic graft rejection, adverse effects of immunosuppression, and recurrence of the disease.

Split-liver transplant—splitting a deceased-donor allograft to provide grafts for 2 recipients—has revolutionized liver transplant by increasing the donor pool and thereby decreasing waitlist mortality rates, especially in pediatric candidates. Despite this advantage, split-liver transplant is technically challenging and associated with increased perioperative complications compared with whole-liver transplant, especially in adult recipients. Recently, experienced centers have reported favorable outcomes with split-liver transplant comparable to those with whole-liver transplant; therefore, split-liver transplant should be considered after careful evaluation of donor organ and recipient clinical status.⁴⁹

Old age in the recipient can also adversely affect liver transplant outcomes.⁵⁰

Interestingly, even in patients whose clinical course is unremarkable and biochemical values are normal, graft hepatitis or fibrosis of unknown cause with progression to cirrhosis has been described in the decade after transplant.⁴¹

Chronic rejection with eventual graft loss may be related to nonadherence in adolescents and can be reduced with use of an additional immunosuppressant such as sirolimus or mycophenolate. Chronic kidney disease can occur in about one-third of liver transplant recipients secondary to renal disease associated with primary disease (like Alagille syndrome), hepatorenal syndrome, and most importantly, use of calcineurin inhibitors.⁴⁵

Components of the metabolic syndrome such as type 2 diabetes, obesity, nonalcoholic fatty liver disease, hypertension, and dyslipidemia are also seen in long-term pediatric liver transplant survivors. Internists are advised to screen for these comorbidities so that interventions can be applied early to improve long-term health outcomes and graft survival.

Of importance, multiple studies have shown a 2-fold increase in the rates of de novo malignancy in liver transplant recipients, including solid-organ and lymphoproliferative cancers, probably due to long-term immunosuppression. Posttransplant lymphoproliferative disorder occurs at lower rates than with other solid-organ transplants; its incidence is greatest in pediatric patients and in the first 12 to 18 months after transplant.⁵¹

While the number of patients with childhood-onset liver disease and pediatric liver transplant recipients who survive into adulthood is increasing, there are no established guidelines or formal models for transitioning these patients into adult care. Consequently, studies on transitional process have examined various issues such as patient and parent frustration, poor medical knowledge among patients during transition, lack of parental facilitation, and inadequate knowledge on disease process among adult-care hepatologists.^52–54

A prolonged period of transition up to age 25 is preferred in complicated cases. Distinctive consideration for transition should include those with neurocognitive developmental delay from underlying disease or hepatic encephalopathy before transplant. These patients need additional support and time to achieve independence in health management before transition.⁵⁷ Validated questionnaires are available to assess readiness to transition into adult care,⁵⁸ implying that the decision to transition should not be based solely on age. 

Thanks to advances in medical science and our understanding of inherited and acquired liver disease, many more children with acquired or congenital liver disease survive into adulthood than they did 2 decades ago. Improvements in immunosuppression and surgery have increased the chances of pediatric liver transplant recipients reaching adulthood, with a survival rate of 75% at 15 to 20 years.¹

With the growing number of adult patients with pediatric-onset liver disease, internists and adult hepatologists need to be aware of these liver diseases and develop expertise to manage this challenging group of patients. Moreover, young adults with pediatric-onset chronic liver disease pose distinct challenges such as pregnancy, adherence to medical regimens, and psychosocial changes in life.

These patients need a “transition of care” rather than a “transfer of care.” Transition of care is a multifaceted process that takes the medical, educational, and psychosocial needs of the patient into consideration before switching their care to adult care physicians, whereas transfer of care is simply an administrative process of change to adult care without previous knowledge of the patients.²

BILIARY ATRESIA

Biliary atresia is a progressive inflammatory fibrosclerosing cholangiopathy of unknown cause. Its prevalence varies with geographic location, ranging from 1 in 6,000 to 1 in 19,000, with the highest prevalence in Taiwan.³

Biliary atresia usually presents within the first few weeks of life, with progressive cholestasis leading to failure to thrive and to fat-soluble vitamin deficiency. Approximately 20% of patients have congenital splenic, gastrointestinal, genitourinary, cardiac, and venous malformations.^4,5 Untreated, biliary atresia progresses to end-stage liver disease and death within 2 years.

The first-line treatment for biliary atresia is to establish biliary outflow with the Kasai procedure (hepatic portoenterostomy), in which a jejunal limb is anastomosed in a Roux-en-Y with the liver. The outcomes of the Kasai procedure depend on the timing of surgery, so timely diagnosis of biliary atresia is crucial. When the Kasai procedure is performed within 60 days of birth, biliary flow is achieved in up to 70% of patients; but if performed after 90 days, biliary flow is achieved in fewer than 25%.⁶

Long-term outcomes of biliary atresia in patients with their native liver have been reported in a few studies.

In a French study,⁷ 743 patients with biliary atresia underwent the Kasai procedure at a median age of 60 days. Survival rates were 57.1% at 2 years, 37.9% at 5 years, 32.4% at 10 years, and 28.5% at 15 years. In other studies,^4–9 the 20-year transplant-free survival rate ranged from 23% to 46%. Therefore, at least one-third of children with biliary atresia survive to adulthood with their native liver.

Implications of biliary atresia in adulthood

Although the Kasai procedure improves biliary outflow, up to 70% of patients develop complications of biliary atresia such as progressive fibrosis, cirrhosis, portal hypertension, cholangitis, and hepatocellular carcinoma, even after a successful Kasai procedure.¹⁰

Portal hypertension with evidence of splenomegaly, thrombocytopenia, or ascites is found in two-thirds of long-term survivors of biliary atresia with a native liver, with variceal hemorrhage occurring in 30%.¹¹ Therefore, patients with biliary atresia who have evidence of portal hypertension should be screened for varices with upper endoscopy on an annual basis. Management of variceal hemorrhage in these patients includes the use of octreotide, antibiotics, variceal ligation, and sclerotherapy; primary prophylaxis can be achieved with beta-blockers and endoscopic variceal ligation.¹²

Cholangitis is frequent, occurring in 40% to 60% of biliary atresia patients after the Kasai procedure, and about one-fourth of these patients have multiple episodes.¹³ The number of episodes of cholangitis negatively affects transplant-free survival.¹⁴ Patients with cholangitis should be adequately treated with oral or intravenous antibiotics depending on the severity of presentation. The role of prophylaxis with antibiotics remains unclear.¹⁵

Pulmonary complications such as hepato­pulmonary syndrome and portopulmonary hypertension can also occur in biliary atresia patients with a native liver. It is important for physicians to be aware of these complications and to screen for them, for example, with agitated saline echocardiography for hepatopulmonary syndrome and with echocardiography for portopulmonary hypertension. Timely screening is crucial, as the outcome of liver transplant depends on the severity at the time of transplant in these conditions, especially portopulmonary hypertension.

Hepatocellular carcinoma has been rarely reported in children with biliary atresia,¹⁶ so well-defined guidelines for screening in young adults with biliary atresia are lacking. Most centers recommend screening with ultrasonography of the abdomen and alpha-fetoprotein measurement every 6 months or annually starting soon after the Kasai procedure, since hepatocellular carcinoma has been reported in children as young as age 2.¹⁶

Transplant. Adult hepatologists are faced with the challenging task of deciding when it is time for transplant, balancing the long-term complications of biliary atresia with the risk of long-term immunosuppression after transplant. In addition, young adults with these complications may have preserved synthetic function, resulting in low Model for End-Stage Liver Disease (MELD) scores, which may complicate the process of listing for transplant.

Neurocognitive deficits are reported in children with biliary atresia,¹⁷ but young adults with biliary atresia generally have reasonable cognitive function and prospects for education and employment.

Pregnancy with successful outcomes has been reported.⁸

Alagille syndrome is an autosomal-dominant multisystemic disease caused by mutations in the JAG1 gene (accounting for > 95% of cases) and the NOTCH2 gene, with highly variable expression.¹⁸

Extrahepatic manifestations include butterfly vertebral defects, facial dysmorphism (eg, deep-set and low-set eyes, with characteristic “triangular” facies), posterior embryotoxon (a congenital defect of the eye characterized by an opaque ring around the margin of the cornea), peripheral pulmonary stenosis, renal abnormalities, and vascular malformations.

Hepatic manifestations vary from asymptomatic laboratory abnormalities to progressive cholestasis starting in early infancy with intractable pruritus, xanthomas, failure to thrive, and end-stage liver disease requiring liver transplant in childhood in 15% to 20% of patients.¹⁹

Implications of Alagille syndrome in adulthood

Transplant. Interestingly, the phenotype of hepatic disease is already established in childhood, with minimal or no progression in adulthood. Most children with minimal liver disease experience spontaneous resolution, whereas those with significant cholestasis might ultimately develop progressive liver fibrosis or cirrhosis requiring liver transplant in childhood. Only a small subset of children with minimal cholestasis progress to end-stage liver disease in late childhood or early adulthood.²⁰ Therefore, liver transplant for progressive liver disease from significant cholestasis almost always occurs in childhood, usually between ages 1 and 4.²¹

In a retrospective study comparing posttransplant outcomes in children with Alagille syndrome and biliary atresia, 1-year patient survival was excellent overall in children with Alagille syndrome, although slightly lower than in children with biliary atresia, most likely owing to extrahepatic morbidities of Alagille syndrome and especially the use of immunosuppression in those with renal disease.²¹ Similarly, 1- and 5-year patient and graft survival outcomes of liver transplant in adults with Alagille syndrome were also excellent compared with those who received a liver transplant in childhood for Alagille syndrome or in adulthood for biliary atresia.²²

Hepatocellular carcinoma has occurred in these patients in the absence of cirrhosis, which makes implementation of prognostic and surveillance strategies almost impossible to design for them. Annual ultrasonography with alpha-fetoprotein testing might be applicable in Alagille syndrome patients. However, deciding which patients should undergo this testing and when it should start will be challenging, given the paucity of data.

Cardiovascular disease. Cardiac phenotype is also mostly established in childhood, with the pulmonary vasculature being most commonly involved.¹⁹ In contrast, renal and other vascular abnormalities can manifest in adulthood. Renal manifestations vary and include structural anomalies such as hyperechoic kidneys or renal cysts, which can manifest in childhood, and some abnormalities such as hypertension and renal artery stenosis that can manifest in adulthood.^23,24

Vasculopathy is reported to involve the intracranial, renal, and intra-abdominal blood vessels.²⁵ Neurovascular accidents such as stroke and intracranial hemorrhage can occur at any age, with significant rates of morbidity and death.²⁶ Therefore, some experts recommend magnetic resonance angiography every 5 years and before any major intervention to prevent these devastating complications.²⁰

Pregnancy. Successful pregnancies have been reported. Preexisting cardiac and hepatic disease can complicate pregnancy depending on the severity of the disease. Because of the autosomal-dominant pattern of inheritance, infants have a 50% risk of the disease, so genetic counseling should be seriously considered before conception.²⁷ Prenatal diagnosis is possible, but the lack of genotype-phenotype correlation precludes its use in clinical practice.

PROGRESSIVE FAMILIAL INTRAHEPATIC CHOLESTASIS

Progressive familial intrahepatic cholestasis (PFIC) is a heterogeneous group of autosomal-recessive conditions associated with disruption of bile formation causing cholestatic liver disease in infants and young children. Three types have been described, depending on the genetic mutation in the hepatobiliary transport pathway:

• PFIC 1 (Byler disease) is caused by impaired bile salt secretion due to mutations in the ATP8B1 gene encoding for the familial intrahepatic cholestasis 1 (FIC 1) protein
• PFIC 2 is caused by impaired bile salt secretion due to mutations in the ABCB11 gene encoding for the bile salt export pump (BSEP) protein
• PFIC 3 is caused by impaired biliary phospholipid secretion due to a defect in ABCB4 encoding for multidrug resistance 3 (MDR3) protein.²⁸

PFIC 1 and 2 manifest with low gamma-glutamyl transferase (GGT) cholestasis, whereas PFIC 3 presents with high GGT cholestasis.

PFIC 1 and PFIC 2 usually cause cholestasis in early infancy, but PFIC 3 can cause cholestasis in late infancy, childhood, and even adulthood.

Because ATP8B1 is expressed in other tissues, PFIC 1 is characterized by extrahepatic manifestations such as sensorineural hearing loss, growth failure, severe diarrhea, and pancreatic insufficiency.

PFIC 1 and 2 (low-GGT cholestasis) are usually progressive and often lead to end-stage liver disease and cirrhosis before adulthood. Therefore, almost all patients with PFIC 1 and 2 undergo liver transplant or at least a biliary diversion procedure before reaching adulthood. Intractable pruritus is one of the most challenging clinical manifestations in patients with PFIC.

First-line management is pharmacologic and includes ursodeoxycholic acid, antihistamines (eg, hydroxyzine), bile acid sequestrants (eg, cholestyramine, colestipol), naltrexone, and rifampin, but these have limited efficacy.¹⁰

Most patients, especially those with PFIC 1 and 2, undergo a biliary diversion procedure such as partial external biliary diversion (cholecystojejunocutaneostomy), ileal exclusion, or partial internal biliary diversion (cholecystojejunocolic anastomosis) to decrease enterohepatic circulation of bile salts. The efficacy of these procedures is very limited in patients with established cirrhosis. Excessive losses of bile can occur through the biliary stoma, leading to dehydration in patients with external biliary diversion. In patients who are not candidates for biliary diversion, endoscopic nasobiliary drainage of pancreatobiliary secretions could be achieved by placing a catheter in the common bile duct; this has been reported to be effective in relieving cholestasis in a few cases.²⁹

Liver transplant is needed in patients with progressive liver disease and intractable pruritus despite medical management and biliary diversion. Unlike in biliary atresia, liver transplant is not curative in PFIC 1, due to extrahepatic manifestations: patients with PFIC 1 can still have intractable diarrhea and pancreatitis after liver transplant. More importantly, allograft steatohepatitis with further progression to cirrhosis can occur after liver transplant in patients with PFIC 1. Interestingly, biliary diversion has been reported to improve graft steatosis and diarrhea after liver transplant.³⁰

Although graft survival after transplant is good in patients with PFIC 2, recurrence of low-GGT cholestasis has been reported and is believed to be due to the formation of anti-bile salt export pump (anti-BSEP) antibodies by the host immune system in response to exposure to new proteins from the transplant graft.³¹

Cancer. The risk of malignancy, especially hepatocellular carcinoma, is also increased in PFIC 2, affecting nearly 15% of patients. Therefore, standard hepatocellular carcinoma surveillance with ultrasonography or alpha-fetoprotein testing or both is recommended in patients with PFIC 2. Cholangiocarcinoma and pancreatic adenocarcinoma have also been reported in patients with PFIC 2.²⁰

Incomplete penetrance of mutations in ATP8B1 and ABCB11 can cause recurrent episodes of cholestasis and pruritus with asymptomatic periods between episodes, referred to as benign recurrent intrahepatic cholestasis. Prognosis is usually good, with no progression to cirrhosis.³²

Pregnancy. In contrast to FIC 1 and BSEP deficiency, MDR3 defects lead to a wide phenotypic spectrum depending on the type of mutation. Heterozygous mutation is associated with increased risk of development of cholestasis during pregnancy, which typically presents with generalized pruritus in the third trimester and is associated with adverse fetal outcomes. Intrahepatic cholestasis of pregnancy is usually treated with ursodeoxycholic acid, with reported improvement in pruritus, liver function, and pregnancy outcomes.³³

In adults, drug-induced liver injury and idiopathic cirrhosis have also been described with MDR3 defects. Intrahepatic lithiasis and cholesterol gallstones can also occur with MDR3 defects as a result of impaired secretion of biliary phospholipid.³² Despite intrahepatic cholestasis of pregnancy, successful outcomes have been reported in women with PFIC.²⁰

OTHER CHILDHOOD-ONSET INHERITED CHOLESTATIC DISEASES

Cystic fibrosis-associated liver disease

Nearly 40% of patients with cystic fibrosis develop liver disease.³⁴ Cystic fibrosis-associated liver disease encompasses a broad clinical spectrum including asymptomatic elevation of aminotransferases, neonatal cholestasis, hepatic steatosis, focal biliary cirrhosis, and multilobar cirrhosis. Cirrhosis and portal hypertension can occur in 5% to 10% of patients and is the third-leading cause of death in patients with cystic fibrosis.³⁵

Risk factors for cystic fibrosis-associated liver disease include male sex, meconium ileus, and severe CFTR gene mutation (class I–III) with pancreatic insufficiency. Cystic fibrosis-related cirrhosis is more frequent in children and adolescents, whereas noncirrhotic portal hypertension and intrahepatic cholangiopathies are more common in adults.³⁶

Limited available studies support treatment with ursodeoxycholic acid in patients with cholestasis to delay the progression of liver disease, but the impact of this drug on long-term outcome is unknown.²⁹

Most patients remain in compensated cirrhosis for many years before progressing to decompensated cirrhosis requiring liver transplant. Other indications for liver transplant include recurrent intractable variceal bleeding, hepatopulmonary syndrome, and portopulmonary hypertension. Combined liver and lung transplant may be considered in patients with advanced liver and lung disease. Outcomes after isolated liver or liver-lung transplant in cystic fibrosis patients have been comparable to those in patients with other liver diseases.³⁷

Defects in bile acid synthesis

Inherited defects of enzymes required for the synthesis of primary bile acids from cholesterol can cause cholestasis from impaired bile flow and production of hepatotoxic aberrant bile acids. The clinical presentation varies depending on the enzymatic defect and can range from liver disease of varying severity to neurologic manifestations. Idiopathic late-onset cholestasis and cirrhosis of unknown etiology have been reported in adults with bile acid synthesis defects.^38,39 Therefore, this diagnosis should be considered in cases of cryptogenic cirrhosis and other cholestatic features.

Treatment with primary bile acids (cholic acid) has been effective in most patients with defective bile acid synthesis.

Primary sclerosing cholangitis

Primary sclerosing cholangitis is characterized by progressive obliteration of intrahepatic and extrahepatic bile ducts and is most commonly seen in patients with inflammatory bowel disease. Sclerosing cholangitis can also be secondary to other diseases in children such as immunodeficiency syndromes, Langerhans cell histiocytosis, cystic fibrosis, or sickle cell anemia.⁴⁰ Neonatal sclerosing cholangitis is a rare autosomal-recessive disease characterized by a severe form of cholangiopathy in neonates and young infants requiring transplant. It can be associated with Kabuki syndrome and neonatal ichthyosis-sclerosing cholangitis syndrome.

Treatment options are limited. Ursodeoxycholic acid and oral vancomycin have variable efficacy. Liver transplant is needed in patients with decompensated cirrhosis. Patients with primary sclerosing cholangitis, especially adults, are at higher risk of developing cholangiocarcinoma, and therefore screening with ultrasonography or magnetic resonance imaging every 6 to 12 months is recommended.

The risk of preterm and cesarean deliveries may be elevated in women with primary sclerosing cholangitis, though data are limited.³³

Adolescent rebellion poses risks

Outcomes of liver transplant in children and adolescents have improved tremendously in the past 2 decades with advances in surgical techniques, pre- and postoperative management, organ preservation, and immunosuppression. Now, most pediatric liver transplant recipients survive into adulthood, creating a unique challenge for internists and adult  care hepatologists.⁴¹

In rebellious adolescents and young adults, risk-taking behavior, nonadherence to immunosuppressive medications, alcohol intake, and substance abuse increase the risk of graft rejection and loss. Current immunosuppressive drugs such as calcineurin inhibitors (tacrolimus, cyclosporine), mycophenolate mofetil, sirolimus, and corticosteroids have drastically decreased rejection rates in compliant patients.⁴¹ Educating patients on the importance of taking their medications and avoiding alcohol and drug abuse is especially important for adolescents and young adults, as rates of nonadherence are high in these age groups.

Although pregnancy is usually successful after liver transplant, it should be considered high-risk due to reported complications such as graft rejection, diabetes, preeclampsia, sepsis, prematurity, and low birth weight. Conception should be avoided for at least 1 year after transplant.⁴² Appropriate counseling with regard to pregnancy and contraception is important.

There is no consensus on breastfeeding, but it is considered safe in women on low-dose calcineurin inhibitors.⁴³

Life is better with a new liver, but patients have special needs

Liver transplant is life-saving and improves quality of life. However, long-term pediatric liver transplant recipients face challenges such as strict adherence to medications and follow-up visits, avoiding exposure to infections, and fear of graft rejection.

Chronic liver disease in children leads to failure to thrive, growth failure, and even delayed puberty, which resolve in most patients after liver transplant before adulthood in the absence of other comorbidities.⁴⁴ However, these patients are reported to have lower psychosocial functioning and more psychiatric disorders such as anxiety or posttraumatic disorder.^41,44

Therefore, a psychologist or other mental health professional should be part of the management team from the time of pretransplant assessment to identify mental health problems and the need for adjustments before liver transplant. Ongoing psychosocial assessment after liver transplant is equally important to identify risks such as drug or alcohol abuse, depression, posttraumatic stress disorder, and medication nonadherence, all of which can negatively affect posttransplant outcome.⁴⁵

In addition, assessment of family functioning and structure is important for good long-term outcomes posttransplant; therefore, a social worker should also be a part of the transplant team. Psyschosocial assessment tools can identify high-risk candidates who would benefit from earlier intervention to avoid any negative impact posttransplant.

Neurocognitive development can be delayed in children with chronic liver disease, and the delay may persist even after liver transplant, with reported impairments in intellectual ability, language, verbal, and visuospatial functioning skills.⁴¹ In spite of this, a recent study found that more than half the study patients were employed at a median follow-up of 24 years from liver transplant and a median age of 27.⁴⁶

Remarkably, pediatric liver transplant recipients have reported quality of life comparable to that in the general population,⁴⁷ and even better than in patients with other chronic illnesses.⁴⁸

Long-term medical comorbidities in pediatric liver transplant recipients

Favorable outcomes such as long-term survival and good quality of life in pediatric liver transplant recipients are lessened by late complications such as portal vein thrombosis or biliary strictures needing interventions, chronic graft rejection, adverse effects of immunosuppression, and recurrence of the disease.

Split-liver transplant—splitting a deceased-donor allograft to provide grafts for 2 recipients—has revolutionized liver transplant by increasing the donor pool and thereby decreasing waitlist mortality rates, especially in pediatric candidates. Despite this advantage, split-liver transplant is technically challenging and associated with increased perioperative complications compared with whole-liver transplant, especially in adult recipients. Recently, experienced centers have reported favorable outcomes with split-liver transplant comparable to those with whole-liver transplant; therefore, split-liver transplant should be considered after careful evaluation of donor organ and recipient clinical status.⁴⁹

Old age in the recipient can also adversely affect liver transplant outcomes.⁵⁰

Interestingly, even in patients whose clinical course is unremarkable and biochemical values are normal, graft hepatitis or fibrosis of unknown cause with progression to cirrhosis has been described in the decade after transplant.⁴¹

Chronic rejection with eventual graft loss may be related to nonadherence in adolescents and can be reduced with use of an additional immunosuppressant such as sirolimus or mycophenolate. Chronic kidney disease can occur in about one-third of liver transplant recipients secondary to renal disease associated with primary disease (like Alagille syndrome), hepatorenal syndrome, and most importantly, use of calcineurin inhibitors.⁴⁵

Components of the metabolic syndrome such as type 2 diabetes, obesity, nonalcoholic fatty liver disease, hypertension, and dyslipidemia are also seen in long-term pediatric liver transplant survivors. Internists are advised to screen for these comorbidities so that interventions can be applied early to improve long-term health outcomes and graft survival.

Of importance, multiple studies have shown a 2-fold increase in the rates of de novo malignancy in liver transplant recipients, including solid-organ and lymphoproliferative cancers, probably due to long-term immunosuppression. Posttransplant lymphoproliferative disorder occurs at lower rates than with other solid-organ transplants; its incidence is greatest in pediatric patients and in the first 12 to 18 months after transplant.⁵¹

While the number of patients with childhood-onset liver disease and pediatric liver transplant recipients who survive into adulthood is increasing, there are no established guidelines or formal models for transitioning these patients into adult care. Consequently, studies on transitional process have examined various issues such as patient and parent frustration, poor medical knowledge among patients during transition, lack of parental facilitation, and inadequate knowledge on disease process among adult-care hepatologists.^52–54

A prolonged period of transition up to age 25 is preferred in complicated cases. Distinctive consideration for transition should include those with neurocognitive developmental delay from underlying disease or hepatic encephalopathy before transplant. These patients need additional support and time to achieve independence in health management before transition.⁵⁷ Validated questionnaires are available to assess readiness to transition into adult care,⁵⁸ implying that the decision to transition should not be based solely on age. 

Giant cell arteritis (GCA) is a systemic vasculitis involving medium-sized and large arteries, most commonly the temporal, ophthalmic, occipital, vertebral, posterior ciliary, and proximal vertebral arteries. Moreover, involvement of the ophthalmic artery and its branches results in loss of vision. GCA can also involve the aorta and its proximal branches, especially in the upper extremities.

GCA is the most common systemic vasculitis in adults. It occurs almost exclusively in patients over age 50 and affects women more than men. It is most frequent in populations of northern European ancestry, especially Scandinavian. In a retrospective cohort study in Norway, the average annual cumulative incidence rate of GCA was 16.7 per 100,000 people over age 50.¹ Risk factors include older age, history of smoking, current smoking, early menopause, and, possibly, stress-related disorders.²

PATHOGENESIS IS NOT COMPLETELY UNDERSTOOD

The pathogenesis of GCA is not completely understood, but there is evidence of immune activation in the arterial wall leading to activation of macrophages and formation of multinucleated giant cells (which may not always be present in biopsies).

The most relevant cytokines in the ongoing pathogenesis are still being defined, but the presence of interferon gamma and interleukin 6 (IL-6) seem to be critical for the expression of the disease. The primary immunogenic triggers for the elaboration of these cytokines and the arteritis remain elusive.

A SPECTRUM OF PRESENTATIONS

The initial symptoms of GCA may be vague, such as malaise, fever, and night sweats, and are likely due to systemic inflammation. Features of vascular involvement include headache, scalp tenderness, and jaw claudication (cramping pain in the jaw while chewing).

A less common but serious feature associated with GCA is partial or complete vision loss affecting 1 or both eyes.³ Some patients suddenly go completely blind without any visual prodrome.

Overlapping GCA phenotypes exist, with a spectrum of presentations that include classic cranial arteritis, extracranial GCA (also called large-vessel GCA), and polymyalgia rheumatica.²

Cranial GCA, the best-characterized clinical presentation, causes symptoms such as headache or signs such as tenderness of the temporal artery. On examination, the temporal arteries may be tender or nodular, and the pulses may be felt above the zygomatic arch, above and in front of the tragus of the ear. About two-thirds of patients with cranial GCA present with new-onset headache, most often in the temporal area, but possibly anywhere throughout the head.

Visual disturbance, jaw claudication, and tongue pain are less common but, if present, increase the likelihood of this diagnosis.²

Large-vessel involvement in GCA is common and refers to involvement of the aorta and its proximal branches. Imaging methods used in diagnosing large-vessel GCA include color Doppler ultrasonography, computed tomography with angiography, magnetic resonance imaging with angiography, and positron emission tomography. In some centers, such imaging is performed in all patients diagnosed with GCA to survey for large-vessel involvement.

Depending on the imaging study, large-vessel involvement has been found in 30% to 80% of cases of GCA.^4,5 It is often associated with nonspecific symptoms such as fever, weight loss, chills, and malaise, but it can also cause more specific symptoms such as unilateral extremity claudication. In contrast to patients with cranial GCA, patients with large-vessel GCA were younger at onset, less likely to have headaches, and more likely to have arm claudication at presentation.⁶ Aortitis of the ascending aorta can occur with a histopathologic pattern of GCA but without the clinical stigmata of GCA.

The finding of aortitis should prompt the clinician to question the patient about other symptoms of GCA and to order imaging of the whole vascular tree. Ultrasonography and biopsy of the temporal arteries can be considered. Whether idiopathic aortitis is part of the GCA spectrum remains to be seen.

Laboratory tests often show anemia, leukocytosis, and thrombocytosis. Acute-phase reactants such as C-reactive protein and the erythrocyte sedimentation rate are often elevated. The sedimentation rate often exceeds 50 mm/hour and sometimes 100 mm/hour.

In 2 retrospective studies, the number of patients with GCA whose sedimentation rate was less than 50 mm/hour ranged between 5% and 11%.^7,8 However, a small percentage of patients with GCA have normal inflammatory markers. Therefore, if the suspicion for GCA is high, treatment should be started and biopsy pursued.⁹ In patients with paraproteinemia or other causes of a spuriously elevated or low erythrocyte sedimentation rate, C-reactive protein is a more reliable test.

Polymyalgia rheumatica is another rheumatologic condition that can occur independently or in conjunction with GCA. It is characterized by stiffness and pain in the proximal joints such as the hips and shoulders, typically worse in the morning and better with activity. Although the patient may subjectively feel weak, a close neurologic examination will reveal normal muscle strength.

Polymyalgia rheumatica is observed in 40% to 60% of patients with GCA at the time of diagnosis; 16% to 21% of patients with polymyalgia rheumatica may develop GCA, especially if untreated.^2,10

Differential diagnosis

Other vasculitides (eg, Takayasu arteritis) can also present with unexplained fever, anemia, and constitutional symptoms.

Infection should be considered if fever is present. An infectious disease accompanied by fever, headache, and elevated inflammatory markers can mimic GCA.

Nonarteritic anterior ischemic optic neuropathy can present with sudden vision loss, prompting concern for underlying GCA. Risk factors include hypertension and diabetes mellitus; other features of GCA, including elevated inflammatory markers, are generally absent.

Temporal artery biopsy remains the standard to confirm the diagnosis. However, because inflammation in the temporal arteries can affect some segments but not others, biopsy results on conventional hematoxylin and eosin staining can be falsely negative in patients with GCA. In one study,¹¹ the mean sensitivity of unilateral temporal artery biopsy was 86.9%.

Typical positive histologic findings are inflammation with panarteritis, CD4-positive lymphocytes, macrophages, giant cells, and fragmentation of the internal elastic lamina.¹²

When GCA is suspected, treatment with glucocorticoids should be started immediately and biopsy performed as soon as possible. Delaying biopsy for 14 days or more may not affect the accuracy of biopsy study.¹³ Treatment should never be withheld while awaiting the results of biopsy study.

Biopsy is usually performed unilaterally, on the same side as the symptoms or abnormal findings on examination. Bilateral temporal artery biopsy is also performed and compared with unilateral biopsy; this approach increases the diagnostic yield by about 5%.¹⁴

IMAGING

In patients with suspected GCA, imaging is recommended early to complement the clinical criteria for the diagnosis of GCA.¹⁵ Positron emission tomography, computed tomography angiography, magnetic resonance angiography, or Doppler ultrasonography can reveal inflammation of the arteries in the proximal upper or lower limbs or the aorta.²

In patients with suspected cranial GCA, ultrasonography of the temporal and axillary arteries is recommended first. If ultrasonography is not available or is inconclusive, high-resolution magnetic resonance imaging of the cranial arteries can be used as an alternative. Computed tomography and positron emission tomography of the cranial arteries are not recommended.

In patients with suspected large-vessel GCA, ultrasonography, positron emission tomography, computed tomography, and magnetic resonance imaging may be used to screen for vessel wall inflammation, edema, and luminal narrowing in extracranial arteries. Ultrasonography is of limited value in assessing aortitis.

Color duplex ultrasonography can be applied to assess for vascular inflammation of the temporal or large arteries. The typical finding of the “halo” sign, a hypoechoic ring around the arterial lumen, represents the inflammation-induced thickening of the arterial wall. The “compression sign,” the persistence of the “halo” during compression of the vessel lumen by the ultrasound probe, has high specificity for the diagnosis.¹⁶

Ultrasonography of suspected GCA has yielded sensitivities of 55% to 100% and specificities of 78% to 100%. However, its sensitivity depends on the user’s level of expertise, so it should be done only in medical centers with a high number of GCA cases and with highly experienced sonographers. High-resolution magnetic resonance imaging is an alternative to ultrasonography and has shown similar sensitivity and specificity.³

TREATMENT WITH GLUCOCORTICOIDS

Glucocorticoids remain the standard for treatment of GCA. The therapeutic effect of glucocorticoids in GCA has been established by years of clinical experience, but has never been proven in a placebo-controlled trial. When started appropriately and expeditiously, glucocorticoids produce exquisite resolution of signs and symptoms and prevent the serious complication of vision loss. Rapid resolution of symptoms is so typical of GCA that if the patient’s symptoms persist more than a few days after starting a glucocorticoid, the diagnosis of GCA should be reconsidered.

In a retrospective study of 245 patients with biopsy-proven GCA treated with glucocorticoids, 34 had permanent loss of sight.¹⁷ In 32 (94%) of the 34, the vision loss occurred before glucocorticoids were started. Of the remaining 2 patients, 1 lost vision 8 days into treatment, and the other lost vision 3 years after diagnosis and 1 year after discontinuation of glucocorticoids.

In a series of 144 patients with biopsy-proven GCA, 51 had no vision loss at presentation and no vision loss after starting glucocorticoids, and 93 had vision loss at presentation. In the latter group, symptoms worsened within 5 days of starting glucocorticoids in 9 patients.¹⁸ If vision was intact at the time of presentation, prompt initiation of glucocorticoids reduced the risk of vision loss to less than 1%.

High doses, slowly tapered

The European League Against Rheumatism recommends early initiation of high-dose glucocorticoids for patients with large-vessel vasculitis,¹⁹ and it also recommends glucocorticoids for patients with polymyalgia rheumatica.²⁰ The optimal initial and tapering dosage has never been formally evaluated, but regimens have been devised on the basis of expert opinion.²¹

For patients with GCA who do not have vision loss at the time of diagnosis, the initial dose is prednisone 1 mg/kg or its equivalent daily for 2 to 4 weeks, after which it is tapered.²¹ If the initial dosage is prednisone 60 mg orally daily for 2 to 4 weeks, our practice is to taper it to 50 mg daily for 2 weeks, then 40 mg daily for 2 weeks. Then, it  is decreased by 5 mg every 2 weeks until it is 20 mg daily, and then by 2.5 mg every 2 weeks until it is 10 mg orally daily. Thereafter, the dosage is decreased by 1 mg every 2 to 4 weeks.

For patients with GCA who experience transient vision loss or diplopia at the time of diagnosis, intravenous pulse glucocorticoid therapy should be initiated to reduce the risk of vision loss as rapidly as possible.²² A typical pulse regimen is methylprednisolone 1 g intravenously daily for 3 days. Though not rigorously validated in studies, such an approach is used to avoid vision impairment due to GCA, which is rarely reversible.

Suspect a relapse of GCA if the patient’s initial symptoms recur, if inflammatory markers become elevated, or if classic symptoms of GCA or polymyalgia rheumatica occur. Elevations in inflammatory markers do not definitely indicate a flare of GCA, but they should trigger close monitoring of the patient’s symptoms.

Relapse is treated by increasing the glucocorticoid dosage as appropriate to the nature of the relapse. If vision is affected or the patient has symptoms of GCA, then increments of 30 to 60 mg of prednisone are warranted, whereas if the patient has symptoms of polymyalgia rheumatica, then increments of 5 to 10 mg of prednisone are usually used.

The incidence of relapses of GCA in multiple tertiary care centers has been reported to vary between 34% and 75%.^23,24 Most relapses occur at prednisone dosages of less than 20 mg orally daily and within the first year after diagnosis. The most common symptoms are limb ischemia, jaw claudication, constitutional symptoms, headaches, and polymyalgia rheumatica. In a review of 286 patients,²⁵ 213 (74%) had at least 1 relapse. The first relapse occurred in the first year in 50%, by 2 years in 68%, and by 5 years in 79%.

ADVERSE EFFECTS OF GLUCOCORTICOIDS

In high doses, glucocorticoids have well-known adverse effects. In a population-based study of 120 patients, each patient treated with glucocorticoids experienced at least 1 adverse effect (cataract, fracture, infection, osteonecrosis, diabetes, hypertension, weight gain, capillary fragility, or hair loss).²⁶ The effects were related to aging and cumulative dosage of prednisone but not to the initial dosage.

Glucocorticoids can affect many organs and systems:

• Eyes (cataracts, increased intraocular pressure, exophthalmos)
• Heart (premature atherosclerotic disease, hypertension, fluid retention, hyperlipidemia, arrhythmias)
• Gastrointestinal system (ulcer, gastrointestinal bleeding, gastritis, visceral perforation, hepatic steatosis, acute pancreatitis)
• Bone and muscle (osteopenia, osteoporosis, osteonecrosis, myopathy)
• Brain (mood disorder, psychosis, memory impairment)
• Endocrine system (hyperglycemia, hypothalamic-pituitary-adrenal axis suppression)
• Immune system (immunosuppression, leading to infection and leukocytosis).

Patients receiving a glucocorticoid dose equivalent to 20 mg or more of prednisone daily for 1 month or more who also have another cause of immunocompromise need prophylaxis against Pneumocystis jirovecii pneumonia.²⁷ They should also receive appropriate immunizations before starting glucocorticoids. Live-virus vaccines should not be given to these patients until they have been off glucocorticoids for 1 month.

Glucocorticoids and bone loss

Glucocorticoids are associated with bone loss and fracture, which can occur within the first few months of use and with dosages as low as 2.5 to 7.5 mg orally daily.²⁸ Therefore, glucocorticoid-induced bone loss has to be treated aggressively, particularly in patients who are older and have a history of fragility fracture.

For patients with GCA who need glucocorticoids in doses greater than 5 mg orally daily for more than 3 months, the following measures are advised to decrease the risk of bone loss:

• Weight-bearing exercise
• Smoking cessation
• Moderation in alcohol intake
• Measures to prevent falls²⁹
• Supplementation with 1,200 mg of calcium and 800 IU of vitamin D.³⁰

Pharmacologic therapy should be initiated in men over age 50 who have established osteoporosis and in postmenopausal women with established osteoporosis or osteopenia. For men over age 50 with established osteopenia, risk assessment with the glucocorticoid-corrected FRAX score (www.sheffield.ac.uk/FRAX) should be performed to identify those at high risk in whom pharmacologic therapy is warranted.³¹

Bisphosphonates are the first-line therapy for glucocorticoid-induced osteoporosis.³²

Teriparatide is the second-line therapy and is used in patients who cannot tolerate bis­phosphonates or other osteoporosis therapies, and in those who have severe osteoporosis, with T scores of –3.5 and below if they have not had a fracture, and –2.5 and below if they have had a fragility fracture.³³

Denosumab, a monoclonal antibody to an osteoclast differentiating factor, may be beneficial for some patients with glucocorticoid-induced osteoporosis.³⁴

To assess the efficacy of therapy, measuring bone mineral density at baseline and at 1 year of therapy is recommended. If density is stable or improved, then repeating the measurement at 2- to 3-year intervals is suggested.

Due to the adverse effects of long-term use of glucocorticoids and high rates of relapse, there is a pressing need for medications that are more efficacious and less toxic to treat GCA.

The European League Against Rheumatism, in its 2009 management guidelines for large-vessel vasculitis, recommend using an adjunctive immunosuppressant agent.¹⁹ In the case of GCA, they recommend using methotrexate 10 to 15 mg/week, which has shown modest evidence of reducing the relapse rate and lowering the cumulative doses of glucocorticoids needed.^35,36

Studies of tumor necrosis factor inhibitors and abatacept have not yielded significant reductions in the relapse rate or decreased cumulative doses of prednisone.^37,38

Advances in treatment for GCA have stagnated, but recent trials^39,40 have evaluated the IL-6 receptor alpha inhibitor tocilizumab, given the central role of IL-6 in the pathogenesis of GCA. Case reports have revealed rapid induction and maintenance of remission in GCA using tocilizumab.^41,42

Villiger et al³⁹ performed a randomized, placebo-controlled trial to study the efficacy and safety of tocilizumab in induction and maintenance of disease remission in 30 patients with newly diagnosed GCA. The primary outcome, complete remission at 12 weeks, was achieved in 85% of patients who received tocilizumab plus tapered prednisolone, compared with 40% of patients who received placebo plus tapering prednisolone. The tocilizumab group also had favorable results in secondary outcomes including relapse-free survival at 52 weeks, time to first relapse after induction of remission, and cumulative dose of prednisolone.

The GiACTA trial. Stone et al⁴⁰ studied the effect of tocilizumab on rates of relapse during glucocorticoid tapering in 251 GCA patients over the course of 52 weeks. Patients were randomized in a 2:1:1:1 ratio to 4 treatment groups:

• Tocilizumab weekly plus prednisone, with prednisone tapered over 26 weeks
• Tocilizumab every other week plus prednisone tapered over 26 weeks
• Placebo plus prednisone tapered over 26 weeks
• Placebo plus prednisone tapered over 52 weeks.

The primary outcome was the rate of sustained glucocorticoid-free remission at 52 weeks. Secondary outcomes included the remission rate, the cumulative glucocorticoid dose, and safety measures. At 52 weeks, the rates of sustained remission were:

• 56% with tocilizumab weekly
• 53% with tocilizumab every other week
• 14% with placebo plus 26-week prednisone taper
• 18% with placebo plus 52-week taper.

Differences between the active treatment groups and the placebo groups were statistically significant (P < .001).

The cumulative dose of prednisone in tocilizumab recipients was significantly less than in placebo recipients. Rates of adverse events were similar. Ultimately, the study showed that tocilizumab, either weekly or every other week, was more effective than prednisone alone at sustaining glucocorticoid-free remission in patients with GCA.

However, the study also raised questions about tocilizumab’s toxic effect profile and its  long-term efficacy, as well as who are the optimal candidates for this therapy. Data on long-term use of tocilizumab are primarily taken from its use in rheumatoid arthritis.⁴³ As of this writing, Stone et al are conducting an open-label trial to help provide long-term safety and efficacy data in patients with GCA. In the meantime, we must extrapolate data from the long-term use of tocilizumab in rheumatoid arthritis.

Tocilizumab and lower gastrointestinal tract perforation

One of the major adverse effects of long-term use of tocilizumab is lower gastrointestinal tract perforation.

Xie et al,⁴⁴ in 2016, reported that the risk of perforation in patients on tocilizumab for rheumatoid arthritis was more than 2 times higher than in patients taking a tumor necrosis factor inhibitor. However, the absolute rates of perforation were low overall,  roughly 1 to 3 per 1,000 patient-years in the tocilizumab group. Risk factors for perforation included older age, history of diverticulitis or other gastrointestinal tract condition, and prednisone doses of 7.5 mg or more a day.

Does tocilizumab prevent blindness?

Another consideration is that tocilizumab may not prevent optic neuropathy. In the GiACTA trial, 1 patient in the group receiving tocilizumab every other week developed optic neuropathy.⁴⁰ Prednisone had been completely tapered off at the time, and the condition resolved when glucocorticoids were restarted. Thus, it is unknown if tocilizumab would be effective on its own without concomitant use of glucocorticoids.

Vision loss is one of the most severe complications of GCA, and it is still unclear whether tocilizumab can prevent vision loss in GCA. Also, we still have no data on the effect of tocilizumab on histopathologic findings, and whether biopsy yield diminishes over time. We hope future studies will help guide us in this regard.

No guidelines on tocilizumab yet

Clinical guidelines on the appropriate use of tocilizumab in GCA are lacking. The American College of Rheumatology and the European League Against Rheumatism have yet to publish updated guidelines with comments on use of tocilizumab. Therefore, it is unclear if tocilizumab is a first-line treatment in GCA, as its efficacy alone without glucocorticoids and its long-term safety in GCA patients have not been studied.

Treatment with tocilizumab should be individualized; it should be considered in patients who have had adverse effects from glucocorticoids, and in patients who experience a flare or cannot have their glucocorticoid dose lowered to an appropriate range.

The optimal duration of tocilizumab therapy is also unknown. However, using the GiACTA study as a rough guide, we try to limit its use to 1 year until additional data are available.

Patients on IL-6 inhibition may have suppressed C-reactive protein regardless of disease activity.⁴³ Therefore, this laboratory value may not be reliable in determining active disease in patients on tocilizumab.

The GiACTA trial has shown an impressive improvement in the relapse-free remission period in patients with GCA taking tocilizumab. However, much work needs to be done to define the safety of this medication and determine which patients should be started on it. In the meantime, we recommend starting high-dose glucocorticoid therapy as soon as the diagnosis of GCA is suspected. In patients who do not tolerate glucocorticoids or whose disease flares during glucocorticoid taper, we recommend starting treatment with tocilizumab either once a week or every other week for at least 1 year.

Giant cell arteritis (GCA) is a systemic vasculitis involving medium-sized and large arteries, most commonly the temporal, ophthalmic, occipital, vertebral, posterior ciliary, and proximal vertebral arteries. Moreover, involvement of the ophthalmic artery and its branches results in loss of vision. GCA can also involve the aorta and its proximal branches, especially in the upper extremities.

GCA is the most common systemic vasculitis in adults. It occurs almost exclusively in patients over age 50 and affects women more than men. It is most frequent in populations of northern European ancestry, especially Scandinavian. In a retrospective cohort study in Norway, the average annual cumulative incidence rate of GCA was 16.7 per 100,000 people over age 50.¹ Risk factors include older age, history of smoking, current smoking, early menopause, and, possibly, stress-related disorders.²

PATHOGENESIS IS NOT COMPLETELY UNDERSTOOD

The pathogenesis of GCA is not completely understood, but there is evidence of immune activation in the arterial wall leading to activation of macrophages and formation of multinucleated giant cells (which may not always be present in biopsies).

The most relevant cytokines in the ongoing pathogenesis are still being defined, but the presence of interferon gamma and interleukin 6 (IL-6) seem to be critical for the expression of the disease. The primary immunogenic triggers for the elaboration of these cytokines and the arteritis remain elusive.

A SPECTRUM OF PRESENTATIONS

The initial symptoms of GCA may be vague, such as malaise, fever, and night sweats, and are likely due to systemic inflammation. Features of vascular involvement include headache, scalp tenderness, and jaw claudication (cramping pain in the jaw while chewing).

A less common but serious feature associated with GCA is partial or complete vision loss affecting 1 or both eyes.³ Some patients suddenly go completely blind without any visual prodrome.

Overlapping GCA phenotypes exist, with a spectrum of presentations that include classic cranial arteritis, extracranial GCA (also called large-vessel GCA), and polymyalgia rheumatica.²

Cranial GCA, the best-characterized clinical presentation, causes symptoms such as headache or signs such as tenderness of the temporal artery. On examination, the temporal arteries may be tender or nodular, and the pulses may be felt above the zygomatic arch, above and in front of the tragus of the ear. About two-thirds of patients with cranial GCA present with new-onset headache, most often in the temporal area, but possibly anywhere throughout the head.

Visual disturbance, jaw claudication, and tongue pain are less common but, if present, increase the likelihood of this diagnosis.²

Large-vessel involvement in GCA is common and refers to involvement of the aorta and its proximal branches. Imaging methods used in diagnosing large-vessel GCA include color Doppler ultrasonography, computed tomography with angiography, magnetic resonance imaging with angiography, and positron emission tomography. In some centers, such imaging is performed in all patients diagnosed with GCA to survey for large-vessel involvement.

Depending on the imaging study, large-vessel involvement has been found in 30% to 80% of cases of GCA.^4,5 It is often associated with nonspecific symptoms such as fever, weight loss, chills, and malaise, but it can also cause more specific symptoms such as unilateral extremity claudication. In contrast to patients with cranial GCA, patients with large-vessel GCA were younger at onset, less likely to have headaches, and more likely to have arm claudication at presentation.⁶ Aortitis of the ascending aorta can occur with a histopathologic pattern of GCA but without the clinical stigmata of GCA.

The finding of aortitis should prompt the clinician to question the patient about other symptoms of GCA and to order imaging of the whole vascular tree. Ultrasonography and biopsy of the temporal arteries can be considered. Whether idiopathic aortitis is part of the GCA spectrum remains to be seen.

Laboratory tests often show anemia, leukocytosis, and thrombocytosis. Acute-phase reactants such as C-reactive protein and the erythrocyte sedimentation rate are often elevated. The sedimentation rate often exceeds 50 mm/hour and sometimes 100 mm/hour.

In 2 retrospective studies, the number of patients with GCA whose sedimentation rate was less than 50 mm/hour ranged between 5% and 11%.^7,8 However, a small percentage of patients with GCA have normal inflammatory markers. Therefore, if the suspicion for GCA is high, treatment should be started and biopsy pursued.⁹ In patients with paraproteinemia or other causes of a spuriously elevated or low erythrocyte sedimentation rate, C-reactive protein is a more reliable test.

Polymyalgia rheumatica is another rheumatologic condition that can occur independently or in conjunction with GCA. It is characterized by stiffness and pain in the proximal joints such as the hips and shoulders, typically worse in the morning and better with activity. Although the patient may subjectively feel weak, a close neurologic examination will reveal normal muscle strength.

Polymyalgia rheumatica is observed in 40% to 60% of patients with GCA at the time of diagnosis; 16% to 21% of patients with polymyalgia rheumatica may develop GCA, especially if untreated.^2,10

Differential diagnosis

Other vasculitides (eg, Takayasu arteritis) can also present with unexplained fever, anemia, and constitutional symptoms.

Infection should be considered if fever is present. An infectious disease accompanied by fever, headache, and elevated inflammatory markers can mimic GCA.

Nonarteritic anterior ischemic optic neuropathy can present with sudden vision loss, prompting concern for underlying GCA. Risk factors include hypertension and diabetes mellitus; other features of GCA, including elevated inflammatory markers, are generally absent.

Temporal artery biopsy remains the standard to confirm the diagnosis. However, because inflammation in the temporal arteries can affect some segments but not others, biopsy results on conventional hematoxylin and eosin staining can be falsely negative in patients with GCA. In one study,¹¹ the mean sensitivity of unilateral temporal artery biopsy was 86.9%.

Typical positive histologic findings are inflammation with panarteritis, CD4-positive lymphocytes, macrophages, giant cells, and fragmentation of the internal elastic lamina.¹²

When GCA is suspected, treatment with glucocorticoids should be started immediately and biopsy performed as soon as possible. Delaying biopsy for 14 days or more may not affect the accuracy of biopsy study.¹³ Treatment should never be withheld while awaiting the results of biopsy study.

Biopsy is usually performed unilaterally, on the same side as the symptoms or abnormal findings on examination. Bilateral temporal artery biopsy is also performed and compared with unilateral biopsy; this approach increases the diagnostic yield by about 5%.¹⁴

IMAGING

In patients with suspected GCA, imaging is recommended early to complement the clinical criteria for the diagnosis of GCA.¹⁵ Positron emission tomography, computed tomography angiography, magnetic resonance angiography, or Doppler ultrasonography can reveal inflammation of the arteries in the proximal upper or lower limbs or the aorta.²

In patients with suspected cranial GCA, ultrasonography of the temporal and axillary arteries is recommended first. If ultrasonography is not available or is inconclusive, high-resolution magnetic resonance imaging of the cranial arteries can be used as an alternative. Computed tomography and positron emission tomography of the cranial arteries are not recommended.

In patients with suspected large-vessel GCA, ultrasonography, positron emission tomography, computed tomography, and magnetic resonance imaging may be used to screen for vessel wall inflammation, edema, and luminal narrowing in extracranial arteries. Ultrasonography is of limited value in assessing aortitis.

Color duplex ultrasonography can be applied to assess for vascular inflammation of the temporal or large arteries. The typical finding of the “halo” sign, a hypoechoic ring around the arterial lumen, represents the inflammation-induced thickening of the arterial wall. The “compression sign,” the persistence of the “halo” during compression of the vessel lumen by the ultrasound probe, has high specificity for the diagnosis.¹⁶

Ultrasonography of suspected GCA has yielded sensitivities of 55% to 100% and specificities of 78% to 100%. However, its sensitivity depends on the user’s level of expertise, so it should be done only in medical centers with a high number of GCA cases and with highly experienced sonographers. High-resolution magnetic resonance imaging is an alternative to ultrasonography and has shown similar sensitivity and specificity.³

TREATMENT WITH GLUCOCORTICOIDS

Glucocorticoids remain the standard for treatment of GCA. The therapeutic effect of glucocorticoids in GCA has been established by years of clinical experience, but has never been proven in a placebo-controlled trial. When started appropriately and expeditiously, glucocorticoids produce exquisite resolution of signs and symptoms and prevent the serious complication of vision loss. Rapid resolution of symptoms is so typical of GCA that if the patient’s symptoms persist more than a few days after starting a glucocorticoid, the diagnosis of GCA should be reconsidered.

In a retrospective study of 245 patients with biopsy-proven GCA treated with glucocorticoids, 34 had permanent loss of sight.¹⁷ In 32 (94%) of the 34, the vision loss occurred before glucocorticoids were started. Of the remaining 2 patients, 1 lost vision 8 days into treatment, and the other lost vision 3 years after diagnosis and 1 year after discontinuation of glucocorticoids.

In a series of 144 patients with biopsy-proven GCA, 51 had no vision loss at presentation and no vision loss after starting glucocorticoids, and 93 had vision loss at presentation. In the latter group, symptoms worsened within 5 days of starting glucocorticoids in 9 patients.¹⁸ If vision was intact at the time of presentation, prompt initiation of glucocorticoids reduced the risk of vision loss to less than 1%.

High doses, slowly tapered

The European League Against Rheumatism recommends early initiation of high-dose glucocorticoids for patients with large-vessel vasculitis,¹⁹ and it also recommends glucocorticoids for patients with polymyalgia rheumatica.²⁰ The optimal initial and tapering dosage has never been formally evaluated, but regimens have been devised on the basis of expert opinion.²¹

For patients with GCA who do not have vision loss at the time of diagnosis, the initial dose is prednisone 1 mg/kg or its equivalent daily for 2 to 4 weeks, after which it is tapered.²¹ If the initial dosage is prednisone 60 mg orally daily for 2 to 4 weeks, our practice is to taper it to 50 mg daily for 2 weeks, then 40 mg daily for 2 weeks. Then, it  is decreased by 5 mg every 2 weeks until it is 20 mg daily, and then by 2.5 mg every 2 weeks until it is 10 mg orally daily. Thereafter, the dosage is decreased by 1 mg every 2 to 4 weeks.

For patients with GCA who experience transient vision loss or diplopia at the time of diagnosis, intravenous pulse glucocorticoid therapy should be initiated to reduce the risk of vision loss as rapidly as possible.²² A typical pulse regimen is methylprednisolone 1 g intravenously daily for 3 days. Though not rigorously validated in studies, such an approach is used to avoid vision impairment due to GCA, which is rarely reversible.

Suspect a relapse of GCA if the patient’s initial symptoms recur, if inflammatory markers become elevated, or if classic symptoms of GCA or polymyalgia rheumatica occur. Elevations in inflammatory markers do not definitely indicate a flare of GCA, but they should trigger close monitoring of the patient’s symptoms.

Relapse is treated by increasing the glucocorticoid dosage as appropriate to the nature of the relapse. If vision is affected or the patient has symptoms of GCA, then increments of 30 to 60 mg of prednisone are warranted, whereas if the patient has symptoms of polymyalgia rheumatica, then increments of 5 to 10 mg of prednisone are usually used.

The incidence of relapses of GCA in multiple tertiary care centers has been reported to vary between 34% and 75%.^23,24 Most relapses occur at prednisone dosages of less than 20 mg orally daily and within the first year after diagnosis. The most common symptoms are limb ischemia, jaw claudication, constitutional symptoms, headaches, and polymyalgia rheumatica. In a review of 286 patients,²⁵ 213 (74%) had at least 1 relapse. The first relapse occurred in the first year in 50%, by 2 years in 68%, and by 5 years in 79%.

ADVERSE EFFECTS OF GLUCOCORTICOIDS

In high doses, glucocorticoids have well-known adverse effects. In a population-based study of 120 patients, each patient treated with glucocorticoids experienced at least 1 adverse effect (cataract, fracture, infection, osteonecrosis, diabetes, hypertension, weight gain, capillary fragility, or hair loss).²⁶ The effects were related to aging and cumulative dosage of prednisone but not to the initial dosage.

Glucocorticoids can affect many organs and systems:

• Eyes (cataracts, increased intraocular pressure, exophthalmos)
• Heart (premature atherosclerotic disease, hypertension, fluid retention, hyperlipidemia, arrhythmias)
• Gastrointestinal system (ulcer, gastrointestinal bleeding, gastritis, visceral perforation, hepatic steatosis, acute pancreatitis)
• Bone and muscle (osteopenia, osteoporosis, osteonecrosis, myopathy)
• Brain (mood disorder, psychosis, memory impairment)
• Endocrine system (hyperglycemia, hypothalamic-pituitary-adrenal axis suppression)
• Immune system (immunosuppression, leading to infection and leukocytosis).

Patients receiving a glucocorticoid dose equivalent to 20 mg or more of prednisone daily for 1 month or more who also have another cause of immunocompromise need prophylaxis against Pneumocystis jirovecii pneumonia.²⁷ They should also receive appropriate immunizations before starting glucocorticoids. Live-virus vaccines should not be given to these patients until they have been off glucocorticoids for 1 month.

Glucocorticoids and bone loss

Glucocorticoids are associated with bone loss and fracture, which can occur within the first few months of use and with dosages as low as 2.5 to 7.5 mg orally daily.²⁸ Therefore, glucocorticoid-induced bone loss has to be treated aggressively, particularly in patients who are older and have a history of fragility fracture.

For patients with GCA who need glucocorticoids in doses greater than 5 mg orally daily for more than 3 months, the following measures are advised to decrease the risk of bone loss:

• Weight-bearing exercise
• Smoking cessation
• Moderation in alcohol intake
• Measures to prevent falls²⁹
• Supplementation with 1,200 mg of calcium and 800 IU of vitamin D.³⁰

Pharmacologic therapy should be initiated in men over age 50 who have established osteoporosis and in postmenopausal women with established osteoporosis or osteopenia. For men over age 50 with established osteopenia, risk assessment with the glucocorticoid-corrected FRAX score (www.sheffield.ac.uk/FRAX) should be performed to identify those at high risk in whom pharmacologic therapy is warranted.³¹

Bisphosphonates are the first-line therapy for glucocorticoid-induced osteoporosis.³²

Teriparatide is the second-line therapy and is used in patients who cannot tolerate bis­phosphonates or other osteoporosis therapies, and in those who have severe osteoporosis, with T scores of –3.5 and below if they have not had a fracture, and –2.5 and below if they have had a fragility fracture.³³

Denosumab, a monoclonal antibody to an osteoclast differentiating factor, may be beneficial for some patients with glucocorticoid-induced osteoporosis.³⁴

To assess the efficacy of therapy, measuring bone mineral density at baseline and at 1 year of therapy is recommended. If density is stable or improved, then repeating the measurement at 2- to 3-year intervals is suggested.

Due to the adverse effects of long-term use of glucocorticoids and high rates of relapse, there is a pressing need for medications that are more efficacious and less toxic to treat GCA.

The European League Against Rheumatism, in its 2009 management guidelines for large-vessel vasculitis, recommend using an adjunctive immunosuppressant agent.¹⁹ In the case of GCA, they recommend using methotrexate 10 to 15 mg/week, which has shown modest evidence of reducing the relapse rate and lowering the cumulative doses of glucocorticoids needed.^35,36

Studies of tumor necrosis factor inhibitors and abatacept have not yielded significant reductions in the relapse rate or decreased cumulative doses of prednisone.^37,38

Advances in treatment for GCA have stagnated, but recent trials^39,40 have evaluated the IL-6 receptor alpha inhibitor tocilizumab, given the central role of IL-6 in the pathogenesis of GCA. Case reports have revealed rapid induction and maintenance of remission in GCA using tocilizumab.^41,42

Villiger et al³⁹ performed a randomized, placebo-controlled trial to study the efficacy and safety of tocilizumab in induction and maintenance of disease remission in 30 patients with newly diagnosed GCA. The primary outcome, complete remission at 12 weeks, was achieved in 85% of patients who received tocilizumab plus tapered prednisolone, compared with 40% of patients who received placebo plus tapering prednisolone. The tocilizumab group also had favorable results in secondary outcomes including relapse-free survival at 52 weeks, time to first relapse after induction of remission, and cumulative dose of prednisolone.

The GiACTA trial. Stone et al⁴⁰ studied the effect of tocilizumab on rates of relapse during glucocorticoid tapering in 251 GCA patients over the course of 52 weeks. Patients were randomized in a 2:1:1:1 ratio to 4 treatment groups:

• Tocilizumab weekly plus prednisone, with prednisone tapered over 26 weeks
• Tocilizumab every other week plus prednisone tapered over 26 weeks
• Placebo plus prednisone tapered over 26 weeks
• Placebo plus prednisone tapered over 52 weeks.

The primary outcome was the rate of sustained glucocorticoid-free remission at 52 weeks. Secondary outcomes included the remission rate, the cumulative glucocorticoid dose, and safety measures. At 52 weeks, the rates of sustained remission were:

• 56% with tocilizumab weekly
• 53% with tocilizumab every other week
• 14% with placebo plus 26-week prednisone taper
• 18% with placebo plus 52-week taper.

Differences between the active treatment groups and the placebo groups were statistically significant (P < .001).

The cumulative dose of prednisone in tocilizumab recipients was significantly less than in placebo recipients. Rates of adverse events were similar. Ultimately, the study showed that tocilizumab, either weekly or every other week, was more effective than prednisone alone at sustaining glucocorticoid-free remission in patients with GCA.

However, the study also raised questions about tocilizumab’s toxic effect profile and its  long-term efficacy, as well as who are the optimal candidates for this therapy. Data on long-term use of tocilizumab are primarily taken from its use in rheumatoid arthritis.⁴³ As of this writing, Stone et al are conducting an open-label trial to help provide long-term safety and efficacy data in patients with GCA. In the meantime, we must extrapolate data from the long-term use of tocilizumab in rheumatoid arthritis.

Tocilizumab and lower gastrointestinal tract perforation

One of the major adverse effects of long-term use of tocilizumab is lower gastrointestinal tract perforation.

Xie et al,⁴⁴ in 2016, reported that the risk of perforation in patients on tocilizumab for rheumatoid arthritis was more than 2 times higher than in patients taking a tumor necrosis factor inhibitor. However, the absolute rates of perforation were low overall,  roughly 1 to 3 per 1,000 patient-years in the tocilizumab group. Risk factors for perforation included older age, history of diverticulitis or other gastrointestinal tract condition, and prednisone doses of 7.5 mg or more a day.

Does tocilizumab prevent blindness?

Another consideration is that tocilizumab may not prevent optic neuropathy. In the GiACTA trial, 1 patient in the group receiving tocilizumab every other week developed optic neuropathy.⁴⁰ Prednisone had been completely tapered off at the time, and the condition resolved when glucocorticoids were restarted. Thus, it is unknown if tocilizumab would be effective on its own without concomitant use of glucocorticoids.

Vision loss is one of the most severe complications of GCA, and it is still unclear whether tocilizumab can prevent vision loss in GCA. Also, we still have no data on the effect of tocilizumab on histopathologic findings, and whether biopsy yield diminishes over time. We hope future studies will help guide us in this regard.

No guidelines on tocilizumab yet

Clinical guidelines on the appropriate use of tocilizumab in GCA are lacking. The American College of Rheumatology and the European League Against Rheumatism have yet to publish updated guidelines with comments on use of tocilizumab. Therefore, it is unclear if tocilizumab is a first-line treatment in GCA, as its efficacy alone without glucocorticoids and its long-term safety in GCA patients have not been studied.

Treatment with tocilizumab should be individualized; it should be considered in patients who have had adverse effects from glucocorticoids, and in patients who experience a flare or cannot have their glucocorticoid dose lowered to an appropriate range.

The optimal duration of tocilizumab therapy is also unknown. However, using the GiACTA study as a rough guide, we try to limit its use to 1 year until additional data are available.

Patients on IL-6 inhibition may have suppressed C-reactive protein regardless of disease activity.⁴³ Therefore, this laboratory value may not be reliable in determining active disease in patients on tocilizumab.

The GiACTA trial has shown an impressive improvement in the relapse-free remission period in patients with GCA taking tocilizumab. However, much work needs to be done to define the safety of this medication and determine which patients should be started on it. In the meantime, we recommend starting high-dose glucocorticoid therapy as soon as the diagnosis of GCA is suspected. In patients who do not tolerate glucocorticoids or whose disease flares during glucocorticoid taper, we recommend starting treatment with tocilizumab either once a week or every other week for at least 1 year.

Giant cell arteritis (GCA) is a systemic vasculitis involving medium-sized and large arteries, most commonly the temporal, ophthalmic, occipital, vertebral, posterior ciliary, and proximal vertebral arteries. Moreover, involvement of the ophthalmic artery and its branches results in loss of vision. GCA can also involve the aorta and its proximal branches, especially in the upper extremities.

GCA is the most common systemic vasculitis in adults. It occurs almost exclusively in patients over age 50 and affects women more than men. It is most frequent in populations of northern European ancestry, especially Scandinavian. In a retrospective cohort study in Norway, the average annual cumulative incidence rate of GCA was 16.7 per 100,000 people over age 50.¹ Risk factors include older age, history of smoking, current smoking, early menopause, and, possibly, stress-related disorders.²

PATHOGENESIS IS NOT COMPLETELY UNDERSTOOD

The pathogenesis of GCA is not completely understood, but there is evidence of immune activation in the arterial wall leading to activation of macrophages and formation of multinucleated giant cells (which may not always be present in biopsies).

The most relevant cytokines in the ongoing pathogenesis are still being defined, but the presence of interferon gamma and interleukin 6 (IL-6) seem to be critical for the expression of the disease. The primary immunogenic triggers for the elaboration of these cytokines and the arteritis remain elusive.

A SPECTRUM OF PRESENTATIONS

The initial symptoms of GCA may be vague, such as malaise, fever, and night sweats, and are likely due to systemic inflammation. Features of vascular involvement include headache, scalp tenderness, and jaw claudication (cramping pain in the jaw while chewing).

A less common but serious feature associated with GCA is partial or complete vision loss affecting 1 or both eyes.³ Some patients suddenly go completely blind without any visual prodrome.

Overlapping GCA phenotypes exist, with a spectrum of presentations that include classic cranial arteritis, extracranial GCA (also called large-vessel GCA), and polymyalgia rheumatica.²

Cranial GCA, the best-characterized clinical presentation, causes symptoms such as headache or signs such as tenderness of the temporal artery. On examination, the temporal arteries may be tender or nodular, and the pulses may be felt above the zygomatic arch, above and in front of the tragus of the ear. About two-thirds of patients with cranial GCA present with new-onset headache, most often in the temporal area, but possibly anywhere throughout the head.

Visual disturbance, jaw claudication, and tongue pain are less common but, if present, increase the likelihood of this diagnosis.²

Large-vessel involvement in GCA is common and refers to involvement of the aorta and its proximal branches. Imaging methods used in diagnosing large-vessel GCA include color Doppler ultrasonography, computed tomography with angiography, magnetic resonance imaging with angiography, and positron emission tomography. In some centers, such imaging is performed in all patients diagnosed with GCA to survey for large-vessel involvement.

Depending on the imaging study, large-vessel involvement has been found in 30% to 80% of cases of GCA.^4,5 It is often associated with nonspecific symptoms such as fever, weight loss, chills, and malaise, but it can also cause more specific symptoms such as unilateral extremity claudication. In contrast to patients with cranial GCA, patients with large-vessel GCA were younger at onset, less likely to have headaches, and more likely to have arm claudication at presentation.⁶ Aortitis of the ascending aorta can occur with a histopathologic pattern of GCA but without the clinical stigmata of GCA.

The finding of aortitis should prompt the clinician to question the patient about other symptoms of GCA and to order imaging of the whole vascular tree. Ultrasonography and biopsy of the temporal arteries can be considered. Whether idiopathic aortitis is part of the GCA spectrum remains to be seen.

Laboratory tests often show anemia, leukocytosis, and thrombocytosis. Acute-phase reactants such as C-reactive protein and the erythrocyte sedimentation rate are often elevated. The sedimentation rate often exceeds 50 mm/hour and sometimes 100 mm/hour.

In 2 retrospective studies, the number of patients with GCA whose sedimentation rate was less than 50 mm/hour ranged between 5% and 11%.^7,8 However, a small percentage of patients with GCA have normal inflammatory markers. Therefore, if the suspicion for GCA is high, treatment should be started and biopsy pursued.⁹ In patients with paraproteinemia or other causes of a spuriously elevated or low erythrocyte sedimentation rate, C-reactive protein is a more reliable test.

Polymyalgia rheumatica is another rheumatologic condition that can occur independently or in conjunction with GCA. It is characterized by stiffness and pain in the proximal joints such as the hips and shoulders, typically worse in the morning and better with activity. Although the patient may subjectively feel weak, a close neurologic examination will reveal normal muscle strength.

Polymyalgia rheumatica is observed in 40% to 60% of patients with GCA at the time of diagnosis; 16% to 21% of patients with polymyalgia rheumatica may develop GCA, especially if untreated.^2,10

Differential diagnosis

Other vasculitides (eg, Takayasu arteritis) can also present with unexplained fever, anemia, and constitutional symptoms.

Infection should be considered if fever is present. An infectious disease accompanied by fever, headache, and elevated inflammatory markers can mimic GCA.

Nonarteritic anterior ischemic optic neuropathy can present with sudden vision loss, prompting concern for underlying GCA. Risk factors include hypertension and diabetes mellitus; other features of GCA, including elevated inflammatory markers, are generally absent.

Temporal artery biopsy remains the standard to confirm the diagnosis. However, because inflammation in the temporal arteries can affect some segments but not others, biopsy results on conventional hematoxylin and eosin staining can be falsely negative in patients with GCA. In one study,¹¹ the mean sensitivity of unilateral temporal artery biopsy was 86.9%.

Typical positive histologic findings are inflammation with panarteritis, CD4-positive lymphocytes, macrophages, giant cells, and fragmentation of the internal elastic lamina.¹²

When GCA is suspected, treatment with glucocorticoids should be started immediately and biopsy performed as soon as possible. Delaying biopsy for 14 days or more may not affect the accuracy of biopsy study.¹³ Treatment should never be withheld while awaiting the results of biopsy study.

Biopsy is usually performed unilaterally, on the same side as the symptoms or abnormal findings on examination. Bilateral temporal artery biopsy is also performed and compared with unilateral biopsy; this approach increases the diagnostic yield by about 5%.¹⁴

IMAGING

In patients with suspected GCA, imaging is recommended early to complement the clinical criteria for the diagnosis of GCA.¹⁵ Positron emission tomography, computed tomography angiography, magnetic resonance angiography, or Doppler ultrasonography can reveal inflammation of the arteries in the proximal upper or lower limbs or the aorta.²

In patients with suspected cranial GCA, ultrasonography of the temporal and axillary arteries is recommended first. If ultrasonography is not available or is inconclusive, high-resolution magnetic resonance imaging of the cranial arteries can be used as an alternative. Computed tomography and positron emission tomography of the cranial arteries are not recommended.

In patients with suspected large-vessel GCA, ultrasonography, positron emission tomography, computed tomography, and magnetic resonance imaging may be used to screen for vessel wall inflammation, edema, and luminal narrowing in extracranial arteries. Ultrasonography is of limited value in assessing aortitis.

Color duplex ultrasonography can be applied to assess for vascular inflammation of the temporal or large arteries. The typical finding of the “halo” sign, a hypoechoic ring around the arterial lumen, represents the inflammation-induced thickening of the arterial wall. The “compression sign,” the persistence of the “halo” during compression of the vessel lumen by the ultrasound probe, has high specificity for the diagnosis.¹⁶

Ultrasonography of suspected GCA has yielded sensitivities of 55% to 100% and specificities of 78% to 100%. However, its sensitivity depends on the user’s level of expertise, so it should be done only in medical centers with a high number of GCA cases and with highly experienced sonographers. High-resolution magnetic resonance imaging is an alternative to ultrasonography and has shown similar sensitivity and specificity.³

TREATMENT WITH GLUCOCORTICOIDS

Glucocorticoids remain the standard for treatment of GCA. The therapeutic effect of glucocorticoids in GCA has been established by years of clinical experience, but has never been proven in a placebo-controlled trial. When started appropriately and expeditiously, glucocorticoids produce exquisite resolution of signs and symptoms and prevent the serious complication of vision loss. Rapid resolution of symptoms is so typical of GCA that if the patient’s symptoms persist more than a few days after starting a glucocorticoid, the diagnosis of GCA should be reconsidered.

In a retrospective study of 245 patients with biopsy-proven GCA treated with glucocorticoids, 34 had permanent loss of sight.¹⁷ In 32 (94%) of the 34, the vision loss occurred before glucocorticoids were started. Of the remaining 2 patients, 1 lost vision 8 days into treatment, and the other lost vision 3 years after diagnosis and 1 year after discontinuation of glucocorticoids.

In a series of 144 patients with biopsy-proven GCA, 51 had no vision loss at presentation and no vision loss after starting glucocorticoids, and 93 had vision loss at presentation. In the latter group, symptoms worsened within 5 days of starting glucocorticoids in 9 patients.¹⁸ If vision was intact at the time of presentation, prompt initiation of glucocorticoids reduced the risk of vision loss to less than 1%.

High doses, slowly tapered

The European League Against Rheumatism recommends early initiation of high-dose glucocorticoids for patients with large-vessel vasculitis,¹⁹ and it also recommends glucocorticoids for patients with polymyalgia rheumatica.²⁰ The optimal initial and tapering dosage has never been formally evaluated, but regimens have been devised on the basis of expert opinion.²¹

For patients with GCA who do not have vision loss at the time of diagnosis, the initial dose is prednisone 1 mg/kg or its equivalent daily for 2 to 4 weeks, after which it is tapered.²¹ If the initial dosage is prednisone 60 mg orally daily for 2 to 4 weeks, our practice is to taper it to 50 mg daily for 2 weeks, then 40 mg daily for 2 weeks. Then, it  is decreased by 5 mg every 2 weeks until it is 20 mg daily, and then by 2.5 mg every 2 weeks until it is 10 mg orally daily. Thereafter, the dosage is decreased by 1 mg every 2 to 4 weeks.

For patients with GCA who experience transient vision loss or diplopia at the time of diagnosis, intravenous pulse glucocorticoid therapy should be initiated to reduce the risk of vision loss as rapidly as possible.²² A typical pulse regimen is methylprednisolone 1 g intravenously daily for 3 days. Though not rigorously validated in studies, such an approach is used to avoid vision impairment due to GCA, which is rarely reversible.

Suspect a relapse of GCA if the patient’s initial symptoms recur, if inflammatory markers become elevated, or if classic symptoms of GCA or polymyalgia rheumatica occur. Elevations in inflammatory markers do not definitely indicate a flare of GCA, but they should trigger close monitoring of the patient’s symptoms.

Relapse is treated by increasing the glucocorticoid dosage as appropriate to the nature of the relapse. If vision is affected or the patient has symptoms of GCA, then increments of 30 to 60 mg of prednisone are warranted, whereas if the patient has symptoms of polymyalgia rheumatica, then increments of 5 to 10 mg of prednisone are usually used.

The incidence of relapses of GCA in multiple tertiary care centers has been reported to vary between 34% and 75%.^23,24 Most relapses occur at prednisone dosages of less than 20 mg orally daily and within the first year after diagnosis. The most common symptoms are limb ischemia, jaw claudication, constitutional symptoms, headaches, and polymyalgia rheumatica. In a review of 286 patients,²⁵ 213 (74%) had at least 1 relapse. The first relapse occurred in the first year in 50%, by 2 years in 68%, and by 5 years in 79%.

ADVERSE EFFECTS OF GLUCOCORTICOIDS

In high doses, glucocorticoids have well-known adverse effects. In a population-based study of 120 patients, each patient treated with glucocorticoids experienced at least 1 adverse effect (cataract, fracture, infection, osteonecrosis, diabetes, hypertension, weight gain, capillary fragility, or hair loss).²⁶ The effects were related to aging and cumulative dosage of prednisone but not to the initial dosage.

Glucocorticoids can affect many organs and systems:

• Eyes (cataracts, increased intraocular pressure, exophthalmos)
• Heart (premature atherosclerotic disease, hypertension, fluid retention, hyperlipidemia, arrhythmias)
• Gastrointestinal system (ulcer, gastrointestinal bleeding, gastritis, visceral perforation, hepatic steatosis, acute pancreatitis)
• Bone and muscle (osteopenia, osteoporosis, osteonecrosis, myopathy)
• Brain (mood disorder, psychosis, memory impairment)
• Endocrine system (hyperglycemia, hypothalamic-pituitary-adrenal axis suppression)
• Immune system (immunosuppression, leading to infection and leukocytosis).

Patients receiving a glucocorticoid dose equivalent to 20 mg or more of prednisone daily for 1 month or more who also have another cause of immunocompromise need prophylaxis against Pneumocystis jirovecii pneumonia.²⁷ They should also receive appropriate immunizations before starting glucocorticoids. Live-virus vaccines should not be given to these patients until they have been off glucocorticoids for 1 month.

Glucocorticoids and bone loss

Glucocorticoids are associated with bone loss and fracture, which can occur within the first few months of use and with dosages as low as 2.5 to 7.5 mg orally daily.²⁸ Therefore, glucocorticoid-induced bone loss has to be treated aggressively, particularly in patients who are older and have a history of fragility fracture.

For patients with GCA who need glucocorticoids in doses greater than 5 mg orally daily for more than 3 months, the following measures are advised to decrease the risk of bone loss:

• Weight-bearing exercise
• Smoking cessation
• Moderation in alcohol intake
• Measures to prevent falls²⁹
• Supplementation with 1,200 mg of calcium and 800 IU of vitamin D.³⁰

Pharmacologic therapy should be initiated in men over age 50 who have established osteoporosis and in postmenopausal women with established osteoporosis or osteopenia. For men over age 50 with established osteopenia, risk assessment with the glucocorticoid-corrected FRAX score (www.sheffield.ac.uk/FRAX) should be performed to identify those at high risk in whom pharmacologic therapy is warranted.³¹

Bisphosphonates are the first-line therapy for glucocorticoid-induced osteoporosis.³²

Teriparatide is the second-line therapy and is used in patients who cannot tolerate bis­phosphonates or other osteoporosis therapies, and in those who have severe osteoporosis, with T scores of –3.5 and below if they have not had a fracture, and –2.5 and below if they have had a fragility fracture.³³

Denosumab, a monoclonal antibody to an osteoclast differentiating factor, may be beneficial for some patients with glucocorticoid-induced osteoporosis.³⁴

To assess the efficacy of therapy, measuring bone mineral density at baseline and at 1 year of therapy is recommended. If density is stable or improved, then repeating the measurement at 2- to 3-year intervals is suggested.

Due to the adverse effects of long-term use of glucocorticoids and high rates of relapse, there is a pressing need for medications that are more efficacious and less toxic to treat GCA.

The European League Against Rheumatism, in its 2009 management guidelines for large-vessel vasculitis, recommend using an adjunctive immunosuppressant agent.¹⁹ In the case of GCA, they recommend using methotrexate 10 to 15 mg/week, which has shown modest evidence of reducing the relapse rate and lowering the cumulative doses of glucocorticoids needed.^35,36

Studies of tumor necrosis factor inhibitors and abatacept have not yielded significant reductions in the relapse rate or decreased cumulative doses of prednisone.^37,38

Advances in treatment for GCA have stagnated, but recent trials^39,40 have evaluated the IL-6 receptor alpha inhibitor tocilizumab, given the central role of IL-6 in the pathogenesis of GCA. Case reports have revealed rapid induction and maintenance of remission in GCA using tocilizumab.^41,42

Villiger et al³⁹ performed a randomized, placebo-controlled trial to study the efficacy and safety of tocilizumab in induction and maintenance of disease remission in 30 patients with newly diagnosed GCA. The primary outcome, complete remission at 12 weeks, was achieved in 85% of patients who received tocilizumab plus tapered prednisolone, compared with 40% of patients who received placebo plus tapering prednisolone. The tocilizumab group also had favorable results in secondary outcomes including relapse-free survival at 52 weeks, time to first relapse after induction of remission, and cumulative dose of prednisolone.

The GiACTA trial. Stone et al⁴⁰ studied the effect of tocilizumab on rates of relapse during glucocorticoid tapering in 251 GCA patients over the course of 52 weeks. Patients were randomized in a 2:1:1:1 ratio to 4 treatment groups:

• Tocilizumab weekly plus prednisone, with prednisone tapered over 26 weeks
• Tocilizumab every other week plus prednisone tapered over 26 weeks
• Placebo plus prednisone tapered over 26 weeks
• Placebo plus prednisone tapered over 52 weeks.

The primary outcome was the rate of sustained glucocorticoid-free remission at 52 weeks. Secondary outcomes included the remission rate, the cumulative glucocorticoid dose, and safety measures. At 52 weeks, the rates of sustained remission were:

• 56% with tocilizumab weekly
• 53% with tocilizumab every other week
• 14% with placebo plus 26-week prednisone taper
• 18% with placebo plus 52-week taper.

Differences between the active treatment groups and the placebo groups were statistically significant (P < .001).

The cumulative dose of prednisone in tocilizumab recipients was significantly less than in placebo recipients. Rates of adverse events were similar. Ultimately, the study showed that tocilizumab, either weekly or every other week, was more effective than prednisone alone at sustaining glucocorticoid-free remission in patients with GCA.

However, the study also raised questions about tocilizumab’s toxic effect profile and its  long-term efficacy, as well as who are the optimal candidates for this therapy. Data on long-term use of tocilizumab are primarily taken from its use in rheumatoid arthritis.⁴³ As of this writing, Stone et al are conducting an open-label trial to help provide long-term safety and efficacy data in patients with GCA. In the meantime, we must extrapolate data from the long-term use of tocilizumab in rheumatoid arthritis.

Tocilizumab and lower gastrointestinal tract perforation

One of the major adverse effects of long-term use of tocilizumab is lower gastrointestinal tract perforation.

Xie et al,⁴⁴ in 2016, reported that the risk of perforation in patients on tocilizumab for rheumatoid arthritis was more than 2 times higher than in patients taking a tumor necrosis factor inhibitor. However, the absolute rates of perforation were low overall,  roughly 1 to 3 per 1,000 patient-years in the tocilizumab group. Risk factors for perforation included older age, history of diverticulitis or other gastrointestinal tract condition, and prednisone doses of 7.5 mg or more a day.

Does tocilizumab prevent blindness?

Another consideration is that tocilizumab may not prevent optic neuropathy. In the GiACTA trial, 1 patient in the group receiving tocilizumab every other week developed optic neuropathy.⁴⁰ Prednisone had been completely tapered off at the time, and the condition resolved when glucocorticoids were restarted. Thus, it is unknown if tocilizumab would be effective on its own without concomitant use of glucocorticoids.

Vision loss is one of the most severe complications of GCA, and it is still unclear whether tocilizumab can prevent vision loss in GCA. Also, we still have no data on the effect of tocilizumab on histopathologic findings, and whether biopsy yield diminishes over time. We hope future studies will help guide us in this regard.

No guidelines on tocilizumab yet

Clinical guidelines on the appropriate use of tocilizumab in GCA are lacking. The American College of Rheumatology and the European League Against Rheumatism have yet to publish updated guidelines with comments on use of tocilizumab. Therefore, it is unclear if tocilizumab is a first-line treatment in GCA, as its efficacy alone without glucocorticoids and its long-term safety in GCA patients have not been studied.

Treatment with tocilizumab should be individualized; it should be considered in patients who have had adverse effects from glucocorticoids, and in patients who experience a flare or cannot have their glucocorticoid dose lowered to an appropriate range.

The optimal duration of tocilizumab therapy is also unknown. However, using the GiACTA study as a rough guide, we try to limit its use to 1 year until additional data are available.

Patients on IL-6 inhibition may have suppressed C-reactive protein regardless of disease activity.⁴³ Therefore, this laboratory value may not be reliable in determining active disease in patients on tocilizumab.

The GiACTA trial has shown an impressive improvement in the relapse-free remission period in patients with GCA taking tocilizumab. However, much work needs to be done to define the safety of this medication and determine which patients should be started on it. In the meantime, we recommend starting high-dose glucocorticoid therapy as soon as the diagnosis of GCA is suspected. In patients who do not tolerate glucocorticoids or whose disease flares during glucocorticoid taper, we recommend starting treatment with tocilizumab either once a week or every other week for at least 1 year.