AVAHO

Real-world survival outcomes for cancer patients on immune checkpoint inhibitors (ICIs) are inferior to outcomes reported in patients on clinical trials of ICIs, according to research published in JCO Clinical Cancer Informatics.

However, the research also suggests that real-world patients who receive ICIs achieve longer survival than patients on standard-of-care medications.

“Patients receiving ICIs in real-world practice may differ from those enrolled in trials in a variety of ways, including age, race, performance status, and comorbidity burden,” said study author Jerry S.H. Lee, PhD, of the University of Southern California, Los Angeles.

Dr. Lee noted that only 3%-4% of cancer patients participate in clinical trials. In fact, more than half of patients with melanoma and nearly three-quarters of those with non–small cell lung cancer (NSCLC) do not meet criteria for eligibility in clinical trials, he said.

To examine the discrepancies between real-world practice and clinical trials and to better understand which patients receive ICIs in clinical practice, Dr. Lee and colleagues conducted a retrospective analysis using electronic health record data from Veterans Administration (VA) facilities nationwide.

The researchers identified 11,888 cancer patients who were treated with ICIs. The cohort included patients who are underrepresented in pivotal clinical trials, including older, non-White, and/or higher disease-burdened patients.

The majority of patients were treated for NSCLC (51.1%), followed by melanoma (14.4%), renal cell carcinoma (RCC; 8.1%), squamous cell carcinoma of the head and neck (6.8%), urothelial cancer (6.4%), hepatocellular carcinoma (4.5%), and other less common cancer types (8.8%).
 

Overall survival by indication

In general, median overall survival (OS) in the VA cohort was inferior to median OS reported in clinical trials. However, patients treated with first-line nivolumab for melanoma and second-line pembrolizumab or nivolumab for NSCLC had similar OS in the real-world and trial data.

The researchers did not report exact OS numbers from clinical trials. However, they did report the exact numbers from the VA cohort and show OS differences between the VA cohort and clinical trials graphically.

Among patients in the VA cohort, the median OS was:

• 25.5 months in melanoma patients on first-line nivolumab
• 16.3 months in RCC patients receiving nivolumab in the second line or higher
• 14 months in RCC patients on first-line ipilimumab and nivolumab
• 10.6 months in NSCLC patients on first-line pembrolizumab
• 9.9 months in NSCLC patients receiving pembrolizumab or nivolumab in the second line or higher
• 9.1 months in NSCLC patients on first-line pembrolizumab and platinum-based chemotherapy
• 6.7 months in urothelial cancer patients receiving ICIs in the second line or higher.

A number of factors may have contributed to the shorter OS observed in the VA cohort, according to the researchers. The VA cohort is predominantly male, is older, and has a higher degree of comorbidity, compared with patients in clinical trials.

In addition, no data are available to determine the cause for discontinuation of therapy, and VA patients may have received ICIs after failing multiple lines of previous therapy, while clinical trials may limit patients to only one or two previous lines of therapy.

After stratifying VA patients by frailty status, the OS among non-frail patients was more similar to the OS reported in clinical trials.

“Real-world outcomes from the VA were more similar when adjusted for frailty, which shows the importance of patient diversity in clinical trials,” Dr. Lee said. He added that the definition of frailty among VA patients included potential injury during combat and therefore differs from a generic frailty definition.
 

ICIs vs. standard care

The researchers also found that VA patients treated with ICIs had longer OS, compared with a cohort of VA patients receiving standard-of-care therapies.

The median OS was as follows:

• In melanoma patients on first-line treatment – 39.29 months with nivolumab and 5.75 months with chemotherapy (P < .001).
• In RCC patients on first-line treatment – 14.01 months with ipilimumab plus nivolumab and 8.63 months with targeted therapy (P = .051).
• In RCC patients on second-line or greater treatment – 12.43 months with nivolumab and 8.09 months with everolimus (P < .001).
• In NSCLC patients on first-line therapy – 8.88 months with pembrolizumab and 6.38 months with a platinum doublet (P < .001).
• In NSCLC patients on first-line combination therapy – 10.59 months with pembrolizumab plus platinum chemotherapy and 6.38 months with a platinum doublet (P < .001).
• In NSCLC patients on second-line or greater therapy – 10.06 months with pembrolizumab or nivolumab and 6.41 months with docetaxel (P < .001).
• In urothelial cancer patients on second-line or greater therapy – 7.66 months with an ICI and 6.31 months with chemotherapy (P = .043).
   

Help for treatment decisions

“The real-world survival outcomes not only indicate the breadth of indications but also represent patients who tend not to be eligible for immunotherapy trials, based on their health status,” Dr. Lee said. “We hope this dataset of national-level experience provides practicing oncologists evidence to help patients and family members in the process of decision-making about therapy.”

Real-world data can also inform oncologists who face decisions on whether to prescribe or withhold ICIs and patients who face the financial burden of paying for ICIs, he said.

This dataset will be continually updated. The researchers have already added another 10,000 VA patients who have received immunotherapies in the year since the trial began.

“In a longitudinal way, we plan to examine what causes differences in outcomes and continue to find ways to extend care to veterans with a balance of high quality of life,” Dr. Lee said.

“Patients who participate in clinical trials are, on average, younger and healthier than the general population,” said Bora Youn, PhD, a senior biostatistician at Biogen in Cambridge, Mass., who was not involved in this study.

“In the case of immunotherapies, those with poor performance status and autoimmune conditions are often excluded from trials,” Dr. Youn added. “In the real world, these patients can also receive treatments, and clinicians often need to extrapolate the results from clinical trials. It is therefore important to collect real-world data to understand the effectiveness and safety of these therapies in patients with limited evidence.”

Dr. Youn led a real-world study, published in Cancer, of 1,256 Medicare recipients who were diagnosed with NSCLC and received ICI therapy.

“We found that factors associated with poor prognosis in general, such as squamous histology and failure of aggressive prior treatment, are also predictive of decreased survival among those who initiated immunotherapies. Yet, OS of older patients was relatively comparable to those observed in clinical trials,” Dr. Youn said.

“Understanding the real-world effectiveness of these treatments will help improve the evidence base, especially for those underrepresented in clinical trials. These studies can also help identify patients who are most likely to benefit from immunotherapies,” Dr. Youn added.

This study was supported by the VA Office of Research and Development Cooperative Studies Program. Dr. Lee and Dr. Youn disclosed no conflicts of interest.

SOURCE: Jennifer La et al. JCO Clinical Cancer Informatics. 2020:4:918-28.

Real-world survival outcomes for cancer patients on immune checkpoint inhibitors (ICIs) are inferior to outcomes reported in patients on clinical trials of ICIs, according to research published in JCO Clinical Cancer Informatics.

However, the research also suggests that real-world patients who receive ICIs achieve longer survival than patients on standard-of-care medications.

“Patients receiving ICIs in real-world practice may differ from those enrolled in trials in a variety of ways, including age, race, performance status, and comorbidity burden,” said study author Jerry S.H. Lee, PhD, of the University of Southern California, Los Angeles.

Dr. Lee noted that only 3%-4% of cancer patients participate in clinical trials. In fact, more than half of patients with melanoma and nearly three-quarters of those with non–small cell lung cancer (NSCLC) do not meet criteria for eligibility in clinical trials, he said.

To examine the discrepancies between real-world practice and clinical trials and to better understand which patients receive ICIs in clinical practice, Dr. Lee and colleagues conducted a retrospective analysis using electronic health record data from Veterans Administration (VA) facilities nationwide.

The researchers identified 11,888 cancer patients who were treated with ICIs. The cohort included patients who are underrepresented in pivotal clinical trials, including older, non-White, and/or higher disease-burdened patients.

The majority of patients were treated for NSCLC (51.1%), followed by melanoma (14.4%), renal cell carcinoma (RCC; 8.1%), squamous cell carcinoma of the head and neck (6.8%), urothelial cancer (6.4%), hepatocellular carcinoma (4.5%), and other less common cancer types (8.8%).
 

Overall survival by indication

In general, median overall survival (OS) in the VA cohort was inferior to median OS reported in clinical trials. However, patients treated with first-line nivolumab for melanoma and second-line pembrolizumab or nivolumab for NSCLC had similar OS in the real-world and trial data.

The researchers did not report exact OS numbers from clinical trials. However, they did report the exact numbers from the VA cohort and show OS differences between the VA cohort and clinical trials graphically.

Among patients in the VA cohort, the median OS was:

• 25.5 months in melanoma patients on first-line nivolumab
• 16.3 months in RCC patients receiving nivolumab in the second line or higher
• 14 months in RCC patients on first-line ipilimumab and nivolumab
• 10.6 months in NSCLC patients on first-line pembrolizumab
• 9.9 months in NSCLC patients receiving pembrolizumab or nivolumab in the second line or higher
• 9.1 months in NSCLC patients on first-line pembrolizumab and platinum-based chemotherapy
• 6.7 months in urothelial cancer patients receiving ICIs in the second line or higher.

A number of factors may have contributed to the shorter OS observed in the VA cohort, according to the researchers. The VA cohort is predominantly male, is older, and has a higher degree of comorbidity, compared with patients in clinical trials.

In addition, no data are available to determine the cause for discontinuation of therapy, and VA patients may have received ICIs after failing multiple lines of previous therapy, while clinical trials may limit patients to only one or two previous lines of therapy.

After stratifying VA patients by frailty status, the OS among non-frail patients was more similar to the OS reported in clinical trials.

“Real-world outcomes from the VA were more similar when adjusted for frailty, which shows the importance of patient diversity in clinical trials,” Dr. Lee said. He added that the definition of frailty among VA patients included potential injury during combat and therefore differs from a generic frailty definition.
 

ICIs vs. standard care

The researchers also found that VA patients treated with ICIs had longer OS, compared with a cohort of VA patients receiving standard-of-care therapies.

The median OS was as follows:

• In melanoma patients on first-line treatment – 39.29 months with nivolumab and 5.75 months with chemotherapy (P < .001).
• In RCC patients on first-line treatment – 14.01 months with ipilimumab plus nivolumab and 8.63 months with targeted therapy (P = .051).
• In RCC patients on second-line or greater treatment – 12.43 months with nivolumab and 8.09 months with everolimus (P < .001).
• In NSCLC patients on first-line therapy – 8.88 months with pembrolizumab and 6.38 months with a platinum doublet (P < .001).
• In NSCLC patients on first-line combination therapy – 10.59 months with pembrolizumab plus platinum chemotherapy and 6.38 months with a platinum doublet (P < .001).
• In NSCLC patients on second-line or greater therapy – 10.06 months with pembrolizumab or nivolumab and 6.41 months with docetaxel (P < .001).
• In urothelial cancer patients on second-line or greater therapy – 7.66 months with an ICI and 6.31 months with chemotherapy (P = .043).
   

Help for treatment decisions

“The real-world survival outcomes not only indicate the breadth of indications but also represent patients who tend not to be eligible for immunotherapy trials, based on their health status,” Dr. Lee said. “We hope this dataset of national-level experience provides practicing oncologists evidence to help patients and family members in the process of decision-making about therapy.”

Real-world data can also inform oncologists who face decisions on whether to prescribe or withhold ICIs and patients who face the financial burden of paying for ICIs, he said.

This dataset will be continually updated. The researchers have already added another 10,000 VA patients who have received immunotherapies in the year since the trial began.

“In a longitudinal way, we plan to examine what causes differences in outcomes and continue to find ways to extend care to veterans with a balance of high quality of life,” Dr. Lee said.

“Patients who participate in clinical trials are, on average, younger and healthier than the general population,” said Bora Youn, PhD, a senior biostatistician at Biogen in Cambridge, Mass., who was not involved in this study.

“In the case of immunotherapies, those with poor performance status and autoimmune conditions are often excluded from trials,” Dr. Youn added. “In the real world, these patients can also receive treatments, and clinicians often need to extrapolate the results from clinical trials. It is therefore important to collect real-world data to understand the effectiveness and safety of these therapies in patients with limited evidence.”

Dr. Youn led a real-world study, published in Cancer, of 1,256 Medicare recipients who were diagnosed with NSCLC and received ICI therapy.

“We found that factors associated with poor prognosis in general, such as squamous histology and failure of aggressive prior treatment, are also predictive of decreased survival among those who initiated immunotherapies. Yet, OS of older patients was relatively comparable to those observed in clinical trials,” Dr. Youn said.

“Understanding the real-world effectiveness of these treatments will help improve the evidence base, especially for those underrepresented in clinical trials. These studies can also help identify patients who are most likely to benefit from immunotherapies,” Dr. Youn added.

This study was supported by the VA Office of Research and Development Cooperative Studies Program. Dr. Lee and Dr. Youn disclosed no conflicts of interest.

SOURCE: Jennifer La et al. JCO Clinical Cancer Informatics. 2020:4:918-28.

Real-world survival outcomes for cancer patients on immune checkpoint inhibitors (ICIs) are inferior to outcomes reported in patients on clinical trials of ICIs, according to research published in JCO Clinical Cancer Informatics.

However, the research also suggests that real-world patients who receive ICIs achieve longer survival than patients on standard-of-care medications.

“Patients receiving ICIs in real-world practice may differ from those enrolled in trials in a variety of ways, including age, race, performance status, and comorbidity burden,” said study author Jerry S.H. Lee, PhD, of the University of Southern California, Los Angeles.

Dr. Lee noted that only 3%-4% of cancer patients participate in clinical trials. In fact, more than half of patients with melanoma and nearly three-quarters of those with non–small cell lung cancer (NSCLC) do not meet criteria for eligibility in clinical trials, he said.

To examine the discrepancies between real-world practice and clinical trials and to better understand which patients receive ICIs in clinical practice, Dr. Lee and colleagues conducted a retrospective analysis using electronic health record data from Veterans Administration (VA) facilities nationwide.

The researchers identified 11,888 cancer patients who were treated with ICIs. The cohort included patients who are underrepresented in pivotal clinical trials, including older, non-White, and/or higher disease-burdened patients.

The majority of patients were treated for NSCLC (51.1%), followed by melanoma (14.4%), renal cell carcinoma (RCC; 8.1%), squamous cell carcinoma of the head and neck (6.8%), urothelial cancer (6.4%), hepatocellular carcinoma (4.5%), and other less common cancer types (8.8%).
 

Overall survival by indication

In general, median overall survival (OS) in the VA cohort was inferior to median OS reported in clinical trials. However, patients treated with first-line nivolumab for melanoma and second-line pembrolizumab or nivolumab for NSCLC had similar OS in the real-world and trial data.

The researchers did not report exact OS numbers from clinical trials. However, they did report the exact numbers from the VA cohort and show OS differences between the VA cohort and clinical trials graphically.

Among patients in the VA cohort, the median OS was:

• 25.5 months in melanoma patients on first-line nivolumab
• 16.3 months in RCC patients receiving nivolumab in the second line or higher
• 14 months in RCC patients on first-line ipilimumab and nivolumab
• 10.6 months in NSCLC patients on first-line pembrolizumab
• 9.9 months in NSCLC patients receiving pembrolizumab or nivolumab in the second line or higher
• 9.1 months in NSCLC patients on first-line pembrolizumab and platinum-based chemotherapy
• 6.7 months in urothelial cancer patients receiving ICIs in the second line or higher.

A number of factors may have contributed to the shorter OS observed in the VA cohort, according to the researchers. The VA cohort is predominantly male, is older, and has a higher degree of comorbidity, compared with patients in clinical trials.

In addition, no data are available to determine the cause for discontinuation of therapy, and VA patients may have received ICIs after failing multiple lines of previous therapy, while clinical trials may limit patients to only one or two previous lines of therapy.

After stratifying VA patients by frailty status, the OS among non-frail patients was more similar to the OS reported in clinical trials.

“Real-world outcomes from the VA were more similar when adjusted for frailty, which shows the importance of patient diversity in clinical trials,” Dr. Lee said. He added that the definition of frailty among VA patients included potential injury during combat and therefore differs from a generic frailty definition.
 

ICIs vs. standard care

The researchers also found that VA patients treated with ICIs had longer OS, compared with a cohort of VA patients receiving standard-of-care therapies.

The median OS was as follows:

• In melanoma patients on first-line treatment – 39.29 months with nivolumab and 5.75 months with chemotherapy (P < .001).
• In RCC patients on first-line treatment – 14.01 months with ipilimumab plus nivolumab and 8.63 months with targeted therapy (P = .051).
• In RCC patients on second-line or greater treatment – 12.43 months with nivolumab and 8.09 months with everolimus (P < .001).
• In NSCLC patients on first-line therapy – 8.88 months with pembrolizumab and 6.38 months with a platinum doublet (P < .001).
• In NSCLC patients on first-line combination therapy – 10.59 months with pembrolizumab plus platinum chemotherapy and 6.38 months with a platinum doublet (P < .001).
• In NSCLC patients on second-line or greater therapy – 10.06 months with pembrolizumab or nivolumab and 6.41 months with docetaxel (P < .001).
• In urothelial cancer patients on second-line or greater therapy – 7.66 months with an ICI and 6.31 months with chemotherapy (P = .043).
   

Help for treatment decisions

“The real-world survival outcomes not only indicate the breadth of indications but also represent patients who tend not to be eligible for immunotherapy trials, based on their health status,” Dr. Lee said. “We hope this dataset of national-level experience provides practicing oncologists evidence to help patients and family members in the process of decision-making about therapy.”

Real-world data can also inform oncologists who face decisions on whether to prescribe or withhold ICIs and patients who face the financial burden of paying for ICIs, he said.

This dataset will be continually updated. The researchers have already added another 10,000 VA patients who have received immunotherapies in the year since the trial began.

“In a longitudinal way, we plan to examine what causes differences in outcomes and continue to find ways to extend care to veterans with a balance of high quality of life,” Dr. Lee said.

“Patients who participate in clinical trials are, on average, younger and healthier than the general population,” said Bora Youn, PhD, a senior biostatistician at Biogen in Cambridge, Mass., who was not involved in this study.

“In the case of immunotherapies, those with poor performance status and autoimmune conditions are often excluded from trials,” Dr. Youn added. “In the real world, these patients can also receive treatments, and clinicians often need to extrapolate the results from clinical trials. It is therefore important to collect real-world data to understand the effectiveness and safety of these therapies in patients with limited evidence.”

Dr. Youn led a real-world study, published in Cancer, of 1,256 Medicare recipients who were diagnosed with NSCLC and received ICI therapy.

“We found that factors associated with poor prognosis in general, such as squamous histology and failure of aggressive prior treatment, are also predictive of decreased survival among those who initiated immunotherapies. Yet, OS of older patients was relatively comparable to those observed in clinical trials,” Dr. Youn said.

“Understanding the real-world effectiveness of these treatments will help improve the evidence base, especially for those underrepresented in clinical trials. These studies can also help identify patients who are most likely to benefit from immunotherapies,” Dr. Youn added.

This study was supported by the VA Office of Research and Development Cooperative Studies Program. Dr. Lee and Dr. Youn disclosed no conflicts of interest.

SOURCE: Jennifer La et al. JCO Clinical Cancer Informatics. 2020:4:918-28.

A new, large study has confirmed that different types of hormone replacement therapy (HRT) are associated with an increased risk for breast cancer and has provided additional information on factors associated with that increased risk.

The study was published online on October 28 in The BMJ.

“The study confirms increased risk of breast cancer in patients taking HRT but shows that the magnitude of risk depends on a number of factors,” first author Yana Vinogradova, PhD, said in an interview. Dr. Vinogradova is a medical statistician at the University of Nottingham (England).

The study also suggests the risk may be lower than was estimated in a large meta-analysis of 24 trials that was published in 2019 in The Lancet. In that study, researchers suggested the risk for breast cancer with HRT was higher and persisted longer than had been thought.

This conclusion from the meta-analysis was widely reported in the lay press and led to the UK Medicine and Healthcare Products Regulatory Agency issuing a safety alert for HRT regarding breast cancer. Experts in the field questioned the alert and said it caused undue anxiety. The European Medicines Agency also issued a safety alert because of the study.

This new study was begun before publication of the meta-analysis. Although the results are broadly similar in suggesting increased risk for breast cancer with HRT use, findings from the new study suggest the risk is lower than had been estimated in the meta-analysis and that the risk diminishes more rapidly after stopping HRT than was suggested by the meta-analysis.

“The publicity surrounding publication of the meta-analysis highlighted unexpectedly high risks and led to a heightened level of concern in some quarters,” Dr. Vinogradova commented. “Our study, based on general population data, has not confirmed any such findings. In general, it showed lower levels of risk and clarified the variability of magnitude within them.”

Dr. Vinogradova said the discrepancy could be related to the fact that the studies were designed differently. The meta-analysis relied on results from 24 studies that were conducted around the world at different periods and included women of different ages and backgrounds. The studies in the meta-analysis used different methods, including questionnaires that relied on women’s memories and therefore could have been biased, she said.

In contrast, the new study analyzed EMR data collected prospectively by general practices in the United Kingdom. The data came from the QResearch and from the Clinical Practice Research Datalink (CPRD) databases, the two largest primary care databases in the United Kingdom, which were linked to hospital, mortality, and cancer registries.

Because this study used a “consistent design” and “consistent data sources,” these new results “are likely to be more accurate and reliable for assessing risks among HRT users,” Dr. Vinogradova commented.

This study used an observational design, so it cannot prove that HRT causes breast cancer. These results may better represent women in the general U.K. population, compared with the earlier meta-analysis, she added.

Commenting on the new study, Michael Jones, PhD, senior staff scientist in genetics and epidemiology at the Institute of Cancer Research, London, also emphasized that it was large and its data came from general practitioner medical records, “so the strong statistical associations are unlikely to be due to chance.

“The results of this study generally confirm what has been seen before and is well established – that the use of combined estrogen plus progestogen HRT is associated with increased risk of breast cancer, and this risk increases with duration of use. But reassuringly, after stopping HRT, the raised risk of breast cancer mostly returns to that seen in nonusers of HRT,” he said.

“It’s important to note that no one study should be considered in isolation,” he added. “Even though some risks were found to be slightly smaller than those reported in another meta-analysis of the worldwide epidemiological evidence recently published in 2019, women considering use of HRT should still follow advice given to them by their [general practitioners].”
 

Study details

In the study, researchers evaluated all types of HRT commonly prescribed in the United Kingdom over the past 20 years, including topical estrogen, vaginal pessaries, and creams. They grouped HRT use by recent (within the past 5 years) and past (5 or more years ago) and HRT duration as short term (less than 5 years) and long term (5 years or longer). Results were adjusted for a range of factors that could affect breast cancer risk, including lifestyle, smoking, alcohol consumption, other medical conditions, family history, and use of other prescribed drugs.

The analysis included 98,611 women aged 50-79 years who were first diagnosed with breast cancer between 1998 and 2019. These women were matched by age and general practice to 457,498 women who were not diagnosed with breast cancer over these years. HRT use was reported in 34% (33,703) of women with breast cancer and in 31% (134,391) of women without breast cancer.

Overall, the risk for breast cancer was increased with use of most HRT drugs (adjusted odds ratio, 1.21; 95% confidence, 1.19-1.23), compared with not using HRT drugs. The highest risk was tied to combined estrogen/progestogen HRT (adjusted OR, 1.26; 95% CI, 1.24-1.29). The lowest risk was tied to estrogen-only HRT (adjusted OR, 1.06; 95% CI, 1.03-1.10). Estrogen cream and vaginal estrogen were not associated with increased breast cancer risk.

In general, breast cancer risk was higher among recent HRT users and those receiving long-term therapy. HRT-associated breast cancer risk increased with age and declined after discontinuing treatment. Therapy of less than 1 year was not associated with increased breast cancer risk.

Women who had recently been receiving long-term combined estrogen/progestogen HRT had a 79% increased risk for breast cancer (adjusted OR, 1.79; 95% CI, 1.73-1.85), compared with never-users. Among recent long-term users of combined HRT, breast cancer risk was highest for norethisterone (adjusted OR, 1.88; 95% CI, 1.79-1.99) and lowest for dydrogesterone (adjusted OR, 1.24; 95% CI, 1.03-1.48). Women who had recently been receiving long-term estrogen-only HRT had a 15% increased risk for breast cancer compared to never-users (adjusted OR, 1.15; 95% CI, 1.09-1.21).

Among women who discontinued HRT 5 or more years ago, risk for breast cancer was no longer increased for long-term estrogen-only therapy and short-term estrogen/progestogen therapy. However, breast cancer risk remained elevated 5 years after discontinuing long-term estrogen/progestogen (adjusted OR, 1.16; 95% CI, 1.11-1.21).

HRT-associated risk for breast cancer increased with age across all durations of therapy.

Compared with never-use, recent long-term estrogen-only therapy was associated with zero extra breast cancer cases per 10,000 women-years among women aged 50-59 years and eight extra cases per 10,000 women-years among women aged 70-79.

Recent long-term estrogen/progestogen use was associated with 15 extra breast cancer cases among women aged 50-59 and 36 extra cases among women aged 70-79 per 10,000 women-years.

Past long-term estrogen/progestogen use was associated with zero extra breast cancer cases among women aged 50-59 and eight extra cases among women aged 70-79 per 10,000 women-years.

Summarizing, Dr. Vinogradova said the increased risk for breast cancer with HRT appears to be “relatively small, particularly for younger women and for any women who use HRT only for a restricted period.”

Decisions about whether to use HRT and which type to use should depend on symptom severity, patient factors, and suitability of other treatment options, she commented.

“Particularly for those women who our study has shown to be most at risk, these decisions should be made through discussions between the patient and her doctor,” she concluded. “We hope that the new and more detailed information provided by our study will facilitate such prescribing decisions.”

The study was partially funded by the School for Primary Care Research of the National Institute for Health Research, by Cancer Research UK, and by the Cancer Research UK Oxford Center. Dr. Vinogradova has disclosed no relevant financial relationships. Senior author Julia Hippisley-Cox is an unpaid director of QResearch and was a paid director of ClinRisk until 2019. The other authors have disclosed no relevant financial relationships.
 

A version of this story originally appeared on Medscape.com.

A new, large study has confirmed that different types of hormone replacement therapy (HRT) are associated with an increased risk for breast cancer and has provided additional information on factors associated with that increased risk.

The study was published online on October 28 in The BMJ.

“The study confirms increased risk of breast cancer in patients taking HRT but shows that the magnitude of risk depends on a number of factors,” first author Yana Vinogradova, PhD, said in an interview. Dr. Vinogradova is a medical statistician at the University of Nottingham (England).

The study also suggests the risk may be lower than was estimated in a large meta-analysis of 24 trials that was published in 2019 in The Lancet. In that study, researchers suggested the risk for breast cancer with HRT was higher and persisted longer than had been thought.

This conclusion from the meta-analysis was widely reported in the lay press and led to the UK Medicine and Healthcare Products Regulatory Agency issuing a safety alert for HRT regarding breast cancer. Experts in the field questioned the alert and said it caused undue anxiety. The European Medicines Agency also issued a safety alert because of the study.

This new study was begun before publication of the meta-analysis. Although the results are broadly similar in suggesting increased risk for breast cancer with HRT use, findings from the new study suggest the risk is lower than had been estimated in the meta-analysis and that the risk diminishes more rapidly after stopping HRT than was suggested by the meta-analysis.

“The publicity surrounding publication of the meta-analysis highlighted unexpectedly high risks and led to a heightened level of concern in some quarters,” Dr. Vinogradova commented. “Our study, based on general population data, has not confirmed any such findings. In general, it showed lower levels of risk and clarified the variability of magnitude within them.”

Dr. Vinogradova said the discrepancy could be related to the fact that the studies were designed differently. The meta-analysis relied on results from 24 studies that were conducted around the world at different periods and included women of different ages and backgrounds. The studies in the meta-analysis used different methods, including questionnaires that relied on women’s memories and therefore could have been biased, she said.

In contrast, the new study analyzed EMR data collected prospectively by general practices in the United Kingdom. The data came from the QResearch and from the Clinical Practice Research Datalink (CPRD) databases, the two largest primary care databases in the United Kingdom, which were linked to hospital, mortality, and cancer registries.

Because this study used a “consistent design” and “consistent data sources,” these new results “are likely to be more accurate and reliable for assessing risks among HRT users,” Dr. Vinogradova commented.

This study used an observational design, so it cannot prove that HRT causes breast cancer. These results may better represent women in the general U.K. population, compared with the earlier meta-analysis, she added.

Commenting on the new study, Michael Jones, PhD, senior staff scientist in genetics and epidemiology at the Institute of Cancer Research, London, also emphasized that it was large and its data came from general practitioner medical records, “so the strong statistical associations are unlikely to be due to chance.

“The results of this study generally confirm what has been seen before and is well established – that the use of combined estrogen plus progestogen HRT is associated with increased risk of breast cancer, and this risk increases with duration of use. But reassuringly, after stopping HRT, the raised risk of breast cancer mostly returns to that seen in nonusers of HRT,” he said.

“It’s important to note that no one study should be considered in isolation,” he added. “Even though some risks were found to be slightly smaller than those reported in another meta-analysis of the worldwide epidemiological evidence recently published in 2019, women considering use of HRT should still follow advice given to them by their [general practitioners].”
 

Study details

In the study, researchers evaluated all types of HRT commonly prescribed in the United Kingdom over the past 20 years, including topical estrogen, vaginal pessaries, and creams. They grouped HRT use by recent (within the past 5 years) and past (5 or more years ago) and HRT duration as short term (less than 5 years) and long term (5 years or longer). Results were adjusted for a range of factors that could affect breast cancer risk, including lifestyle, smoking, alcohol consumption, other medical conditions, family history, and use of other prescribed drugs.

The analysis included 98,611 women aged 50-79 years who were first diagnosed with breast cancer between 1998 and 2019. These women were matched by age and general practice to 457,498 women who were not diagnosed with breast cancer over these years. HRT use was reported in 34% (33,703) of women with breast cancer and in 31% (134,391) of women without breast cancer.

Overall, the risk for breast cancer was increased with use of most HRT drugs (adjusted odds ratio, 1.21; 95% confidence, 1.19-1.23), compared with not using HRT drugs. The highest risk was tied to combined estrogen/progestogen HRT (adjusted OR, 1.26; 95% CI, 1.24-1.29). The lowest risk was tied to estrogen-only HRT (adjusted OR, 1.06; 95% CI, 1.03-1.10). Estrogen cream and vaginal estrogen were not associated with increased breast cancer risk.

In general, breast cancer risk was higher among recent HRT users and those receiving long-term therapy. HRT-associated breast cancer risk increased with age and declined after discontinuing treatment. Therapy of less than 1 year was not associated with increased breast cancer risk.

Women who had recently been receiving long-term combined estrogen/progestogen HRT had a 79% increased risk for breast cancer (adjusted OR, 1.79; 95% CI, 1.73-1.85), compared with never-users. Among recent long-term users of combined HRT, breast cancer risk was highest for norethisterone (adjusted OR, 1.88; 95% CI, 1.79-1.99) and lowest for dydrogesterone (adjusted OR, 1.24; 95% CI, 1.03-1.48). Women who had recently been receiving long-term estrogen-only HRT had a 15% increased risk for breast cancer compared to never-users (adjusted OR, 1.15; 95% CI, 1.09-1.21).

Among women who discontinued HRT 5 or more years ago, risk for breast cancer was no longer increased for long-term estrogen-only therapy and short-term estrogen/progestogen therapy. However, breast cancer risk remained elevated 5 years after discontinuing long-term estrogen/progestogen (adjusted OR, 1.16; 95% CI, 1.11-1.21).

HRT-associated risk for breast cancer increased with age across all durations of therapy.

Compared with never-use, recent long-term estrogen-only therapy was associated with zero extra breast cancer cases per 10,000 women-years among women aged 50-59 years and eight extra cases per 10,000 women-years among women aged 70-79.

Recent long-term estrogen/progestogen use was associated with 15 extra breast cancer cases among women aged 50-59 and 36 extra cases among women aged 70-79 per 10,000 women-years.

Past long-term estrogen/progestogen use was associated with zero extra breast cancer cases among women aged 50-59 and eight extra cases among women aged 70-79 per 10,000 women-years.

Summarizing, Dr. Vinogradova said the increased risk for breast cancer with HRT appears to be “relatively small, particularly for younger women and for any women who use HRT only for a restricted period.”

Decisions about whether to use HRT and which type to use should depend on symptom severity, patient factors, and suitability of other treatment options, she commented.

“Particularly for those women who our study has shown to be most at risk, these decisions should be made through discussions between the patient and her doctor,” she concluded. “We hope that the new and more detailed information provided by our study will facilitate such prescribing decisions.”

The study was partially funded by the School for Primary Care Research of the National Institute for Health Research, by Cancer Research UK, and by the Cancer Research UK Oxford Center. Dr. Vinogradova has disclosed no relevant financial relationships. Senior author Julia Hippisley-Cox is an unpaid director of QResearch and was a paid director of ClinRisk until 2019. The other authors have disclosed no relevant financial relationships.
 

A version of this story originally appeared on Medscape.com.

A new, large study has confirmed that different types of hormone replacement therapy (HRT) are associated with an increased risk for breast cancer and has provided additional information on factors associated with that increased risk.

The study was published online on October 28 in The BMJ.

“The study confirms increased risk of breast cancer in patients taking HRT but shows that the magnitude of risk depends on a number of factors,” first author Yana Vinogradova, PhD, said in an interview. Dr. Vinogradova is a medical statistician at the University of Nottingham (England).

The study also suggests the risk may be lower than was estimated in a large meta-analysis of 24 trials that was published in 2019 in The Lancet. In that study, researchers suggested the risk for breast cancer with HRT was higher and persisted longer than had been thought.

This conclusion from the meta-analysis was widely reported in the lay press and led to the UK Medicine and Healthcare Products Regulatory Agency issuing a safety alert for HRT regarding breast cancer. Experts in the field questioned the alert and said it caused undue anxiety. The European Medicines Agency also issued a safety alert because of the study.

This new study was begun before publication of the meta-analysis. Although the results are broadly similar in suggesting increased risk for breast cancer with HRT use, findings from the new study suggest the risk is lower than had been estimated in the meta-analysis and that the risk diminishes more rapidly after stopping HRT than was suggested by the meta-analysis.

“The publicity surrounding publication of the meta-analysis highlighted unexpectedly high risks and led to a heightened level of concern in some quarters,” Dr. Vinogradova commented. “Our study, based on general population data, has not confirmed any such findings. In general, it showed lower levels of risk and clarified the variability of magnitude within them.”

Dr. Vinogradova said the discrepancy could be related to the fact that the studies were designed differently. The meta-analysis relied on results from 24 studies that were conducted around the world at different periods and included women of different ages and backgrounds. The studies in the meta-analysis used different methods, including questionnaires that relied on women’s memories and therefore could have been biased, she said.

In contrast, the new study analyzed EMR data collected prospectively by general practices in the United Kingdom. The data came from the QResearch and from the Clinical Practice Research Datalink (CPRD) databases, the two largest primary care databases in the United Kingdom, which were linked to hospital, mortality, and cancer registries.

Because this study used a “consistent design” and “consistent data sources,” these new results “are likely to be more accurate and reliable for assessing risks among HRT users,” Dr. Vinogradova commented.

This study used an observational design, so it cannot prove that HRT causes breast cancer. These results may better represent women in the general U.K. population, compared with the earlier meta-analysis, she added.

Commenting on the new study, Michael Jones, PhD, senior staff scientist in genetics and epidemiology at the Institute of Cancer Research, London, also emphasized that it was large and its data came from general practitioner medical records, “so the strong statistical associations are unlikely to be due to chance.

“The results of this study generally confirm what has been seen before and is well established – that the use of combined estrogen plus progestogen HRT is associated with increased risk of breast cancer, and this risk increases with duration of use. But reassuringly, after stopping HRT, the raised risk of breast cancer mostly returns to that seen in nonusers of HRT,” he said.

“It’s important to note that no one study should be considered in isolation,” he added. “Even though some risks were found to be slightly smaller than those reported in another meta-analysis of the worldwide epidemiological evidence recently published in 2019, women considering use of HRT should still follow advice given to them by their [general practitioners].”
 

Study details

In the study, researchers evaluated all types of HRT commonly prescribed in the United Kingdom over the past 20 years, including topical estrogen, vaginal pessaries, and creams. They grouped HRT use by recent (within the past 5 years) and past (5 or more years ago) and HRT duration as short term (less than 5 years) and long term (5 years or longer). Results were adjusted for a range of factors that could affect breast cancer risk, including lifestyle, smoking, alcohol consumption, other medical conditions, family history, and use of other prescribed drugs.

The analysis included 98,611 women aged 50-79 years who were first diagnosed with breast cancer between 1998 and 2019. These women were matched by age and general practice to 457,498 women who were not diagnosed with breast cancer over these years. HRT use was reported in 34% (33,703) of women with breast cancer and in 31% (134,391) of women without breast cancer.

Overall, the risk for breast cancer was increased with use of most HRT drugs (adjusted odds ratio, 1.21; 95% confidence, 1.19-1.23), compared with not using HRT drugs. The highest risk was tied to combined estrogen/progestogen HRT (adjusted OR, 1.26; 95% CI, 1.24-1.29). The lowest risk was tied to estrogen-only HRT (adjusted OR, 1.06; 95% CI, 1.03-1.10). Estrogen cream and vaginal estrogen were not associated with increased breast cancer risk.

In general, breast cancer risk was higher among recent HRT users and those receiving long-term therapy. HRT-associated breast cancer risk increased with age and declined after discontinuing treatment. Therapy of less than 1 year was not associated with increased breast cancer risk.

Women who had recently been receiving long-term combined estrogen/progestogen HRT had a 79% increased risk for breast cancer (adjusted OR, 1.79; 95% CI, 1.73-1.85), compared with never-users. Among recent long-term users of combined HRT, breast cancer risk was highest for norethisterone (adjusted OR, 1.88; 95% CI, 1.79-1.99) and lowest for dydrogesterone (adjusted OR, 1.24; 95% CI, 1.03-1.48). Women who had recently been receiving long-term estrogen-only HRT had a 15% increased risk for breast cancer compared to never-users (adjusted OR, 1.15; 95% CI, 1.09-1.21).

Among women who discontinued HRT 5 or more years ago, risk for breast cancer was no longer increased for long-term estrogen-only therapy and short-term estrogen/progestogen therapy. However, breast cancer risk remained elevated 5 years after discontinuing long-term estrogen/progestogen (adjusted OR, 1.16; 95% CI, 1.11-1.21).

HRT-associated risk for breast cancer increased with age across all durations of therapy.

Compared with never-use, recent long-term estrogen-only therapy was associated with zero extra breast cancer cases per 10,000 women-years among women aged 50-59 years and eight extra cases per 10,000 women-years among women aged 70-79.

Recent long-term estrogen/progestogen use was associated with 15 extra breast cancer cases among women aged 50-59 and 36 extra cases among women aged 70-79 per 10,000 women-years.

Past long-term estrogen/progestogen use was associated with zero extra breast cancer cases among women aged 50-59 and eight extra cases among women aged 70-79 per 10,000 women-years.

Summarizing, Dr. Vinogradova said the increased risk for breast cancer with HRT appears to be “relatively small, particularly for younger women and for any women who use HRT only for a restricted period.”

Decisions about whether to use HRT and which type to use should depend on symptom severity, patient factors, and suitability of other treatment options, she commented.

“Particularly for those women who our study has shown to be most at risk, these decisions should be made through discussions between the patient and her doctor,” she concluded. “We hope that the new and more detailed information provided by our study will facilitate such prescribing decisions.”

The study was partially funded by the School for Primary Care Research of the National Institute for Health Research, by Cancer Research UK, and by the Cancer Research UK Oxford Center. Dr. Vinogradova has disclosed no relevant financial relationships. Senior author Julia Hippisley-Cox is an unpaid director of QResearch and was a paid director of ClinRisk until 2019. The other authors have disclosed no relevant financial relationships.
 

A version of this story originally appeared on Medscape.com.

Integrating PET imaging into postprostatectomy radiation therapy (RT) decisions and planning can improve prostate cancer outcomes, first results of the EMPIRE-1 trial suggest.

The findings were reported in a plenary session at the American Society for Radiation Oncology Annual Meeting 2020.

“Quite frankly, this is an area where we are shooting in the dark with conventional imaging, and that’s where we think molecular imaging has a potential role,” noted coprincipal investigator Ashesh B. Jani, MD, of the Winship Cancer Institute of Emory University, Atlanta.

“We hypothesized that radiotherapy outcomes can be improved upon by PET by excluding patients with extrapelvic disease and also by improving treatment field decisions and target definition,” Dr. Jani added.

Patients with prostate cancer were eligible for EMPIRE-1 if they had undergone prostatectomy and had a detectable prostate-specific antigen (PSA) level but negative findings on conventional imaging (a bone scan plus abdominopelvic CT and/or MRI).

A total of 165 patients were randomized to RT guided by the conventional imaging alone or combined with PET imaging using the radiotracer fluciclovine (18F). Treatment decisions in the latter group were strictly based on where uptake was seen.
 

Study results

The trial’s primary endpoint was treatment failure, defined as a PSA level exceeding 0.2 ng/mL from nadir followed by another rise, a continued PSA rise despite RT, progression on imaging or digital rectal exam, or initiation of systemic therapy.

“Most imaging studies tend to focus on diagnostic accuracy, pathologic correlation, and decision changes. It’s a very high bar for an imaging study to influence failure rates,” Dr. Jani pointed out.

Adding 18F-PET to conventional imaging altered the treatment decision for 35.4% of patients in that group (P < .001). It also significantly altered a range of volumetric and dosimetric parameters.

At a median follow-up of 2.48 years, the 3-year rate of failure-free survival was 63.0% with conventional imaging alone and 75.5% with the addition of 18F-PET (P = .003). The corresponding 4-year rate was 51.2% and 75.5%, respectively (P < .001).

In multivariate analysis, the conventional imaging group had double the risk of failure events relative to the PET group (hazard ratio, 2.04; P = .033).

Provider-reported data showed no significant difference between imaging groups in maximum acute or late genitourinary toxicity and gastrointestinal toxicity. An analysis of patient-reported toxicity data is pending.

“Randomized trials of imaging tests with a primary cancer control endpoint are important but uncommonly done,” Dr. Jani commented. “This is the first such trial of PET over conventional imaging in the postprostatectomy radiotherapy setting.”

“Inclusion of fluciclovine resulted in a significant improvement in failure rate at 3 years. This warrants further investigation,” he maintained.

To that end, the investigators have launched the EMPIRE-2 trial, which is comparing RT guided by 18F-PET with PET using another radiotracer that is not yet approved by the Food and Drug Administration, gallium-68 prostate-specific membrane antigen.
 

Findings in context

“There are several remarkable aspects of the EMPIRE-1 trial worth noting,” said invited discussant Neha Vapiwala, MD, of the University of Pennsylvania, Philadelphia.

She commended the trial’s randomization, given a bias that more imaging is better, and the diversity of its participants that better reflects the general population of prostate cancer patients.

“The study procedures appear to be well tolerated despite a net overall increase in the radiation volume treated in the patients who underwent PET, although we do still await patient-reported toxicity,” Dr. Vapiwala noted. “Finally, a high bar was set, with a clinically meaningful primary endpoint for an imaging study.

“This study ultimately demonstrated that, in the PET arm, better selection with PET was able to result in better patient outcomes,” she maintained.

At the same time, Dr. Vapiwala recommended caution when reducing or withholding definitive local therapy based on PET results, as occurred in 14 patients.

“We must always be able to see the forest from the trees, and when evaluating our patients with PET scans, what we see and what we don’t see is just one piece of the puzzle. Existing level 1 evidence and oncologic principles must still apply,” she said. “While PET can help paint a more complete picture, it should not define the picture itself.”

The study was supported by the National Institutes of Health. Dr. Jani disclosed advisory board service for Blue Earth Diagnostics. Dr. Vapiwala disclosed no relevant conflicts of interest.

SOURCE: Jani A et al. ASTRO 2020, Abstract LBA1.

Integrating PET imaging into postprostatectomy radiation therapy (RT) decisions and planning can improve prostate cancer outcomes, first results of the EMPIRE-1 trial suggest.

The findings were reported in a plenary session at the American Society for Radiation Oncology Annual Meeting 2020.

“Quite frankly, this is an area where we are shooting in the dark with conventional imaging, and that’s where we think molecular imaging has a potential role,” noted coprincipal investigator Ashesh B. Jani, MD, of the Winship Cancer Institute of Emory University, Atlanta.

“We hypothesized that radiotherapy outcomes can be improved upon by PET by excluding patients with extrapelvic disease and also by improving treatment field decisions and target definition,” Dr. Jani added.

Patients with prostate cancer were eligible for EMPIRE-1 if they had undergone prostatectomy and had a detectable prostate-specific antigen (PSA) level but negative findings on conventional imaging (a bone scan plus abdominopelvic CT and/or MRI).

A total of 165 patients were randomized to RT guided by the conventional imaging alone or combined with PET imaging using the radiotracer fluciclovine (18F). Treatment decisions in the latter group were strictly based on where uptake was seen.
 

Study results

The trial’s primary endpoint was treatment failure, defined as a PSA level exceeding 0.2 ng/mL from nadir followed by another rise, a continued PSA rise despite RT, progression on imaging or digital rectal exam, or initiation of systemic therapy.

“Most imaging studies tend to focus on diagnostic accuracy, pathologic correlation, and decision changes. It’s a very high bar for an imaging study to influence failure rates,” Dr. Jani pointed out.

Adding 18F-PET to conventional imaging altered the treatment decision for 35.4% of patients in that group (P < .001). It also significantly altered a range of volumetric and dosimetric parameters.

At a median follow-up of 2.48 years, the 3-year rate of failure-free survival was 63.0% with conventional imaging alone and 75.5% with the addition of 18F-PET (P = .003). The corresponding 4-year rate was 51.2% and 75.5%, respectively (P < .001).

In multivariate analysis, the conventional imaging group had double the risk of failure events relative to the PET group (hazard ratio, 2.04; P = .033).

Provider-reported data showed no significant difference between imaging groups in maximum acute or late genitourinary toxicity and gastrointestinal toxicity. An analysis of patient-reported toxicity data is pending.

“Randomized trials of imaging tests with a primary cancer control endpoint are important but uncommonly done,” Dr. Jani commented. “This is the first such trial of PET over conventional imaging in the postprostatectomy radiotherapy setting.”

“Inclusion of fluciclovine resulted in a significant improvement in failure rate at 3 years. This warrants further investigation,” he maintained.

To that end, the investigators have launched the EMPIRE-2 trial, which is comparing RT guided by 18F-PET with PET using another radiotracer that is not yet approved by the Food and Drug Administration, gallium-68 prostate-specific membrane antigen.
 

Findings in context

“There are several remarkable aspects of the EMPIRE-1 trial worth noting,” said invited discussant Neha Vapiwala, MD, of the University of Pennsylvania, Philadelphia.

She commended the trial’s randomization, given a bias that more imaging is better, and the diversity of its participants that better reflects the general population of prostate cancer patients.

“The study procedures appear to be well tolerated despite a net overall increase in the radiation volume treated in the patients who underwent PET, although we do still await patient-reported toxicity,” Dr. Vapiwala noted. “Finally, a high bar was set, with a clinically meaningful primary endpoint for an imaging study.

“This study ultimately demonstrated that, in the PET arm, better selection with PET was able to result in better patient outcomes,” she maintained.

At the same time, Dr. Vapiwala recommended caution when reducing or withholding definitive local therapy based on PET results, as occurred in 14 patients.

“We must always be able to see the forest from the trees, and when evaluating our patients with PET scans, what we see and what we don’t see is just one piece of the puzzle. Existing level 1 evidence and oncologic principles must still apply,” she said. “While PET can help paint a more complete picture, it should not define the picture itself.”

The study was supported by the National Institutes of Health. Dr. Jani disclosed advisory board service for Blue Earth Diagnostics. Dr. Vapiwala disclosed no relevant conflicts of interest.

SOURCE: Jani A et al. ASTRO 2020, Abstract LBA1.

Integrating PET imaging into postprostatectomy radiation therapy (RT) decisions and planning can improve prostate cancer outcomes, first results of the EMPIRE-1 trial suggest.

The findings were reported in a plenary session at the American Society for Radiation Oncology Annual Meeting 2020.

“Quite frankly, this is an area where we are shooting in the dark with conventional imaging, and that’s where we think molecular imaging has a potential role,” noted coprincipal investigator Ashesh B. Jani, MD, of the Winship Cancer Institute of Emory University, Atlanta.

“We hypothesized that radiotherapy outcomes can be improved upon by PET by excluding patients with extrapelvic disease and also by improving treatment field decisions and target definition,” Dr. Jani added.

Patients with prostate cancer were eligible for EMPIRE-1 if they had undergone prostatectomy and had a detectable prostate-specific antigen (PSA) level but negative findings on conventional imaging (a bone scan plus abdominopelvic CT and/or MRI).

A total of 165 patients were randomized to RT guided by the conventional imaging alone or combined with PET imaging using the radiotracer fluciclovine (18F). Treatment decisions in the latter group were strictly based on where uptake was seen.
 

Study results

The trial’s primary endpoint was treatment failure, defined as a PSA level exceeding 0.2 ng/mL from nadir followed by another rise, a continued PSA rise despite RT, progression on imaging or digital rectal exam, or initiation of systemic therapy.

“Most imaging studies tend to focus on diagnostic accuracy, pathologic correlation, and decision changes. It’s a very high bar for an imaging study to influence failure rates,” Dr. Jani pointed out.

Adding 18F-PET to conventional imaging altered the treatment decision for 35.4% of patients in that group (P < .001). It also significantly altered a range of volumetric and dosimetric parameters.

At a median follow-up of 2.48 years, the 3-year rate of failure-free survival was 63.0% with conventional imaging alone and 75.5% with the addition of 18F-PET (P = .003). The corresponding 4-year rate was 51.2% and 75.5%, respectively (P < .001).

In multivariate analysis, the conventional imaging group had double the risk of failure events relative to the PET group (hazard ratio, 2.04; P = .033).

Provider-reported data showed no significant difference between imaging groups in maximum acute or late genitourinary toxicity and gastrointestinal toxicity. An analysis of patient-reported toxicity data is pending.

“Randomized trials of imaging tests with a primary cancer control endpoint are important but uncommonly done,” Dr. Jani commented. “This is the first such trial of PET over conventional imaging in the postprostatectomy radiotherapy setting.”

“Inclusion of fluciclovine resulted in a significant improvement in failure rate at 3 years. This warrants further investigation,” he maintained.

To that end, the investigators have launched the EMPIRE-2 trial, which is comparing RT guided by 18F-PET with PET using another radiotracer that is not yet approved by the Food and Drug Administration, gallium-68 prostate-specific membrane antigen.
 

Findings in context

“There are several remarkable aspects of the EMPIRE-1 trial worth noting,” said invited discussant Neha Vapiwala, MD, of the University of Pennsylvania, Philadelphia.

She commended the trial’s randomization, given a bias that more imaging is better, and the diversity of its participants that better reflects the general population of prostate cancer patients.

“The study procedures appear to be well tolerated despite a net overall increase in the radiation volume treated in the patients who underwent PET, although we do still await patient-reported toxicity,” Dr. Vapiwala noted. “Finally, a high bar was set, with a clinically meaningful primary endpoint for an imaging study.

“This study ultimately demonstrated that, in the PET arm, better selection with PET was able to result in better patient outcomes,” she maintained.

At the same time, Dr. Vapiwala recommended caution when reducing or withholding definitive local therapy based on PET results, as occurred in 14 patients.

“We must always be able to see the forest from the trees, and when evaluating our patients with PET scans, what we see and what we don’t see is just one piece of the puzzle. Existing level 1 evidence and oncologic principles must still apply,” she said. “While PET can help paint a more complete picture, it should not define the picture itself.”

The study was supported by the National Institutes of Health. Dr. Jani disclosed advisory board service for Blue Earth Diagnostics. Dr. Vapiwala disclosed no relevant conflicts of interest.

SOURCE: Jani A et al. ASTRO 2020, Abstract LBA1.

Stereotactic body radiotherapy (SBRT) for lung oligometastases nets similar safety and efficacy whether it is delivered in multiple fractions or just one fraction. This was among key findings of a randomized, phase 2 trial reported at the American Society for Radiation Oncology Annual Meeting 2020.

“Most patients [with lung metastases] are treated with lifelong anticancer drug therapy only, with little prospect for long-term cancer control,” investigator Shankar Siva, MBBS, PhD, of Peter MacCallum Cancer Centre in Melbourne, said in a news briefing.

“However, some patients may have limited spread to the lungs and may be suitable for either surgery, which is an invasive approach, or SBRT, which is a noninvasive approach, with the aim to prolong long-term cancer control,” he added.
 

Patients and treatment

Dr. Siva and colleagues enrolled in their phase 2 trial (SAFRON II/TROG 13.01) 90 patients from 13 centers in Australia and New Zealand.

All patients had one to three lung metastases (from nonhematologic malignancies) that measured up to 5 cm in diameter and were located in the periphery.

The most common primaries were colorectal cancer (47%), lung cancer (11%), and kidney cancer (10%). The trial required that all primary and extrathoracic disease had been definitively treated.

The patients were randomized evenly to lung SBRT delivered with a single-fraction regimen (28 Gy in one fraction) or a multifraction regimen (48 Gy in four fractions) that netted the same biological equivalent dose.
 

Safety and efficacy

The two treatment groups did not differ significantly with respect to any-grade toxicities at 1 year, with the exception of higher rates of esophagitis and radiation dermatitis in the multifraction group, Dr. Siva reported.

The rate of grade 3 or worse toxicity at 1 year – the trial’s primary endpoint – was 5% with the single fraction and 3% with multiple fractions, with overlapping 80% confidence intervals, meeting the prespecified endpoint for acceptable toxicity.

The single-fraction group had two grade 3 events that resolved with intervention and no grade 4-5 events. The multifraction group had a single grade 5 event (fatal pneumonitis in a patient with underlying interstitial lung disease) and no grade 3-4 events.

The single-fraction and multifraction groups were also similar at 1 year on rates of freedom from local failure (93% and 95%, respectively), disease-free survival (59% and 60%, respectively), and overall survival (95% and 93%, respectively), with overlapping 95% CIs for each outcome.

Analyses of quality of life and cost-effectiveness are ongoing.
 

Applying the results: Useful in a pandemic?

“Single-session SBRT is safe, convenient, and noninvasive, and appears to be effective, to date, for lung secondaries. This approach may be considered as a one-stop, knockout type of approach for patients who have one to three metastases to the lung,” Dr. Siva proposed.

“These findings may have implications for treatment selection in a resource-constrained environment, such as the current global pandemic, when trying to reduce footfall or thoroughfare within a radiotherapy department, and it’s quite a convenient approach for patients,” he added.
 

“Stereotactic radiation has an obvious advantage over conventional radiation in several ways and may have a special advantage in the midst of the COVID-19 pandemic to reduce exposure to patients and our hospital personnel,” agreed news briefing moderator Sue S. Yom, MD, PhD, of the University of California, San Francisco.

However, use of stereotactic techniques remains controversial because they require technical precision and additional resources for planning and quality assurance, and they are often more expensive than conventional radiation therapy, she noted. Therefore, there must be evidence to justify their use in a palliative or metastatic setting.

The current trial is noteworthy for pushing the SBRT efficiency envelope, according to Dr. Yom.

“These findings are going to be confirmed by the study team with further follow-up at 3 years,” she pointed out. “If the findings of this study are maintained, it shows that patients with up to three metastatic tumors in the lung can have their treatment given in an extremely efficient manner over one session, which saves them time and hospital resources, and could be very significant to patients’ quality of life.”

The trial is sponsored by the Trans-Tasman Radiation Oncology Group and the Australasian Lung Cancer Trials Group. Dr. Siva disclosed relationships with Varian Industries, Merck, AstraZeneca, Bayer Pharmaceuticals, Bristol Meyers Squibb, and Reflexion. Dr. Yom disclosed no relevant conflicts.

SOURCE: Siva S et al. ASTRO 2020, Abstract 5.

Stereotactic body radiotherapy (SBRT) for lung oligometastases nets similar safety and efficacy whether it is delivered in multiple fractions or just one fraction. This was among key findings of a randomized, phase 2 trial reported at the American Society for Radiation Oncology Annual Meeting 2020.

“Most patients [with lung metastases] are treated with lifelong anticancer drug therapy only, with little prospect for long-term cancer control,” investigator Shankar Siva, MBBS, PhD, of Peter MacCallum Cancer Centre in Melbourne, said in a news briefing.

“However, some patients may have limited spread to the lungs and may be suitable for either surgery, which is an invasive approach, or SBRT, which is a noninvasive approach, with the aim to prolong long-term cancer control,” he added.
 

Patients and treatment

Dr. Siva and colleagues enrolled in their phase 2 trial (SAFRON II/TROG 13.01) 90 patients from 13 centers in Australia and New Zealand.

All patients had one to three lung metastases (from nonhematologic malignancies) that measured up to 5 cm in diameter and were located in the periphery.

The most common primaries were colorectal cancer (47%), lung cancer (11%), and kidney cancer (10%). The trial required that all primary and extrathoracic disease had been definitively treated.

The patients were randomized evenly to lung SBRT delivered with a single-fraction regimen (28 Gy in one fraction) or a multifraction regimen (48 Gy in four fractions) that netted the same biological equivalent dose.
 

Safety and efficacy

The two treatment groups did not differ significantly with respect to any-grade toxicities at 1 year, with the exception of higher rates of esophagitis and radiation dermatitis in the multifraction group, Dr. Siva reported.

The rate of grade 3 or worse toxicity at 1 year – the trial’s primary endpoint – was 5% with the single fraction and 3% with multiple fractions, with overlapping 80% confidence intervals, meeting the prespecified endpoint for acceptable toxicity.

The single-fraction group had two grade 3 events that resolved with intervention and no grade 4-5 events. The multifraction group had a single grade 5 event (fatal pneumonitis in a patient with underlying interstitial lung disease) and no grade 3-4 events.

The single-fraction and multifraction groups were also similar at 1 year on rates of freedom from local failure (93% and 95%, respectively), disease-free survival (59% and 60%, respectively), and overall survival (95% and 93%, respectively), with overlapping 95% CIs for each outcome.

Analyses of quality of life and cost-effectiveness are ongoing.
 

Applying the results: Useful in a pandemic?

“Single-session SBRT is safe, convenient, and noninvasive, and appears to be effective, to date, for lung secondaries. This approach may be considered as a one-stop, knockout type of approach for patients who have one to three metastases to the lung,” Dr. Siva proposed.

“These findings may have implications for treatment selection in a resource-constrained environment, such as the current global pandemic, when trying to reduce footfall or thoroughfare within a radiotherapy department, and it’s quite a convenient approach for patients,” he added.
 

“Stereotactic radiation has an obvious advantage over conventional radiation in several ways and may have a special advantage in the midst of the COVID-19 pandemic to reduce exposure to patients and our hospital personnel,” agreed news briefing moderator Sue S. Yom, MD, PhD, of the University of California, San Francisco.

However, use of stereotactic techniques remains controversial because they require technical precision and additional resources for planning and quality assurance, and they are often more expensive than conventional radiation therapy, she noted. Therefore, there must be evidence to justify their use in a palliative or metastatic setting.

The current trial is noteworthy for pushing the SBRT efficiency envelope, according to Dr. Yom.

“These findings are going to be confirmed by the study team with further follow-up at 3 years,” she pointed out. “If the findings of this study are maintained, it shows that patients with up to three metastatic tumors in the lung can have their treatment given in an extremely efficient manner over one session, which saves them time and hospital resources, and could be very significant to patients’ quality of life.”

The trial is sponsored by the Trans-Tasman Radiation Oncology Group and the Australasian Lung Cancer Trials Group. Dr. Siva disclosed relationships with Varian Industries, Merck, AstraZeneca, Bayer Pharmaceuticals, Bristol Meyers Squibb, and Reflexion. Dr. Yom disclosed no relevant conflicts.

SOURCE: Siva S et al. ASTRO 2020, Abstract 5.

Stereotactic body radiotherapy (SBRT) for lung oligometastases nets similar safety and efficacy whether it is delivered in multiple fractions or just one fraction. This was among key findings of a randomized, phase 2 trial reported at the American Society for Radiation Oncology Annual Meeting 2020.

“Most patients [with lung metastases] are treated with lifelong anticancer drug therapy only, with little prospect for long-term cancer control,” investigator Shankar Siva, MBBS, PhD, of Peter MacCallum Cancer Centre in Melbourne, said in a news briefing.

“However, some patients may have limited spread to the lungs and may be suitable for either surgery, which is an invasive approach, or SBRT, which is a noninvasive approach, with the aim to prolong long-term cancer control,” he added.
 

Patients and treatment

Dr. Siva and colleagues enrolled in their phase 2 trial (SAFRON II/TROG 13.01) 90 patients from 13 centers in Australia and New Zealand.

All patients had one to three lung metastases (from nonhematologic malignancies) that measured up to 5 cm in diameter and were located in the periphery.

The most common primaries were colorectal cancer (47%), lung cancer (11%), and kidney cancer (10%). The trial required that all primary and extrathoracic disease had been definitively treated.

The patients were randomized evenly to lung SBRT delivered with a single-fraction regimen (28 Gy in one fraction) or a multifraction regimen (48 Gy in four fractions) that netted the same biological equivalent dose.
 

Safety and efficacy

The two treatment groups did not differ significantly with respect to any-grade toxicities at 1 year, with the exception of higher rates of esophagitis and radiation dermatitis in the multifraction group, Dr. Siva reported.

The rate of grade 3 or worse toxicity at 1 year – the trial’s primary endpoint – was 5% with the single fraction and 3% with multiple fractions, with overlapping 80% confidence intervals, meeting the prespecified endpoint for acceptable toxicity.

The single-fraction group had two grade 3 events that resolved with intervention and no grade 4-5 events. The multifraction group had a single grade 5 event (fatal pneumonitis in a patient with underlying interstitial lung disease) and no grade 3-4 events.

The single-fraction and multifraction groups were also similar at 1 year on rates of freedom from local failure (93% and 95%, respectively), disease-free survival (59% and 60%, respectively), and overall survival (95% and 93%, respectively), with overlapping 95% CIs for each outcome.

Analyses of quality of life and cost-effectiveness are ongoing.
 

Applying the results: Useful in a pandemic?

“Single-session SBRT is safe, convenient, and noninvasive, and appears to be effective, to date, for lung secondaries. This approach may be considered as a one-stop, knockout type of approach for patients who have one to three metastases to the lung,” Dr. Siva proposed.

“These findings may have implications for treatment selection in a resource-constrained environment, such as the current global pandemic, when trying to reduce footfall or thoroughfare within a radiotherapy department, and it’s quite a convenient approach for patients,” he added.
 

“Stereotactic radiation has an obvious advantage over conventional radiation in several ways and may have a special advantage in the midst of the COVID-19 pandemic to reduce exposure to patients and our hospital personnel,” agreed news briefing moderator Sue S. Yom, MD, PhD, of the University of California, San Francisco.

However, use of stereotactic techniques remains controversial because they require technical precision and additional resources for planning and quality assurance, and they are often more expensive than conventional radiation therapy, she noted. Therefore, there must be evidence to justify their use in a palliative or metastatic setting.

The current trial is noteworthy for pushing the SBRT efficiency envelope, according to Dr. Yom.

“These findings are going to be confirmed by the study team with further follow-up at 3 years,” she pointed out. “If the findings of this study are maintained, it shows that patients with up to three metastatic tumors in the lung can have their treatment given in an extremely efficient manner over one session, which saves them time and hospital resources, and could be very significant to patients’ quality of life.”

The trial is sponsored by the Trans-Tasman Radiation Oncology Group and the Australasian Lung Cancer Trials Group. Dr. Siva disclosed relationships with Varian Industries, Merck, AstraZeneca, Bayer Pharmaceuticals, Bristol Meyers Squibb, and Reflexion. Dr. Yom disclosed no relevant conflicts.

SOURCE: Siva S et al. ASTRO 2020, Abstract 5.

Statin use may significantly lower the risk of colorectal cancer (CRC) in patients with or without inflammatory bowel disease (IBD), based on a meta-analysis and systematic review.

In more than 15,000 patients with IBD, statin use was associated with a 60% reduced risk of CRC, reported lead author Kevin N. Singh, MD, of NYU Langone Medical Center in New York, and colleagues.

“Statin use has been linked with a risk reduction for cancers including hepatocellular carcinoma, breast, gastric, pancreatic, and biliary tract cancers, but data supporting the use of statins for chemoprevention against CRC is conflicting,” Dr. Singh said during a virtual presentation at the annual meeting of the American College of Gastroenterology.

He noted a 2014 meta-analysis by Lytras and colleagues that reported a 9% CRC risk reduction in statin users who did not have IBD. In patients with IBD, data are scarce, according to Dr. Singh.

To further explore the relationship between statin use and CRC in patients without IBD, the investigators analyzed data from 52 studies, including 8 randomized clinical trials, 17 cohort studies, and 27 case-control studies. Of the 11,459,306 patients involved, approximately 2 million used statins and roughly 9 million did not.

To evaluate the same relationship in patients with IBD, the investigators conducted a separate meta-analysis involving 15,342 patients from 5 observational studies, 1 of which was an unpublished abstract. In the 4 published studies, 1,161 patients used statins while 12,145 did not.

In the non-IBD population, statin use was associated with a 20% reduced risk of CRC (pooled odds ratio, 0.80; 95% confidence interval, 0.73-0.88; P less than .001). In patients with IBD, statin use was associated with a 60% CRC risk reduction (pooled OR, 0.40; 95% CI, 0.19-0.86, P = .019).

Dr. Singh noted “significant heterogeneity” in both analyses (I2 greater than 75), most prominently in the IBD populations, which he ascribed to “differences in demographic features, ethnic groups, and risk factors for CRC.”

While publication bias was absent from the non-IBD analysis, it was detected in the IBD portion of the study. Dr. Singh said that selection bias may also have been present in the IBD analysis, due to exclusive use of observational studies.

“Prospective trials are needed to confirm the risk reduction of CRC in the IBD population, including whether the effects of statins differ between ulcerative colitis and Crohn’s disease patients,” Dr. Singh said.

Additional analyses are underway, he added, including one that will account for the potentially confounding effect of aspirin use.

According to David E. Kaplan, MD, of the University of Pennsylvania, Philadelphia, “The finding that statins are associated with reduced CRC in IBD provides additional support for the clinical importance of the antineoplastic effects of statins. This effect has been strongly observed in liver cancer, and is pending prospective validation.”

Dr. Kaplan also offered some mechanistic insight into why statins have an anticancer effect, pointing to “the centrality of cholesterol biosynthesis for development and/or progression of malignancy.”

The investigators and Dr. Kaplan reported no relevant conflicts of interest.

Statin use may significantly lower the risk of colorectal cancer (CRC) in patients with or without inflammatory bowel disease (IBD), based on a meta-analysis and systematic review.

In more than 15,000 patients with IBD, statin use was associated with a 60% reduced risk of CRC, reported lead author Kevin N. Singh, MD, of NYU Langone Medical Center in New York, and colleagues.

“Statin use has been linked with a risk reduction for cancers including hepatocellular carcinoma, breast, gastric, pancreatic, and biliary tract cancers, but data supporting the use of statins for chemoprevention against CRC is conflicting,” Dr. Singh said during a virtual presentation at the annual meeting of the American College of Gastroenterology.

He noted a 2014 meta-analysis by Lytras and colleagues that reported a 9% CRC risk reduction in statin users who did not have IBD. In patients with IBD, data are scarce, according to Dr. Singh.

To further explore the relationship between statin use and CRC in patients without IBD, the investigators analyzed data from 52 studies, including 8 randomized clinical trials, 17 cohort studies, and 27 case-control studies. Of the 11,459,306 patients involved, approximately 2 million used statins and roughly 9 million did not.

To evaluate the same relationship in patients with IBD, the investigators conducted a separate meta-analysis involving 15,342 patients from 5 observational studies, 1 of which was an unpublished abstract. In the 4 published studies, 1,161 patients used statins while 12,145 did not.

In the non-IBD population, statin use was associated with a 20% reduced risk of CRC (pooled odds ratio, 0.80; 95% confidence interval, 0.73-0.88; P less than .001). In patients with IBD, statin use was associated with a 60% CRC risk reduction (pooled OR, 0.40; 95% CI, 0.19-0.86, P = .019).

Dr. Singh noted “significant heterogeneity” in both analyses (I2 greater than 75), most prominently in the IBD populations, which he ascribed to “differences in demographic features, ethnic groups, and risk factors for CRC.”

While publication bias was absent from the non-IBD analysis, it was detected in the IBD portion of the study. Dr. Singh said that selection bias may also have been present in the IBD analysis, due to exclusive use of observational studies.

“Prospective trials are needed to confirm the risk reduction of CRC in the IBD population, including whether the effects of statins differ between ulcerative colitis and Crohn’s disease patients,” Dr. Singh said.

Additional analyses are underway, he added, including one that will account for the potentially confounding effect of aspirin use.

According to David E. Kaplan, MD, of the University of Pennsylvania, Philadelphia, “The finding that statins are associated with reduced CRC in IBD provides additional support for the clinical importance of the antineoplastic effects of statins. This effect has been strongly observed in liver cancer, and is pending prospective validation.”

Dr. Kaplan also offered some mechanistic insight into why statins have an anticancer effect, pointing to “the centrality of cholesterol biosynthesis for development and/or progression of malignancy.”

The investigators and Dr. Kaplan reported no relevant conflicts of interest.

Statin use may significantly lower the risk of colorectal cancer (CRC) in patients with or without inflammatory bowel disease (IBD), based on a meta-analysis and systematic review.

In more than 15,000 patients with IBD, statin use was associated with a 60% reduced risk of CRC, reported lead author Kevin N. Singh, MD, of NYU Langone Medical Center in New York, and colleagues.

“Statin use has been linked with a risk reduction for cancers including hepatocellular carcinoma, breast, gastric, pancreatic, and biliary tract cancers, but data supporting the use of statins for chemoprevention against CRC is conflicting,” Dr. Singh said during a virtual presentation at the annual meeting of the American College of Gastroenterology.

He noted a 2014 meta-analysis by Lytras and colleagues that reported a 9% CRC risk reduction in statin users who did not have IBD. In patients with IBD, data are scarce, according to Dr. Singh.

To further explore the relationship between statin use and CRC in patients without IBD, the investigators analyzed data from 52 studies, including 8 randomized clinical trials, 17 cohort studies, and 27 case-control studies. Of the 11,459,306 patients involved, approximately 2 million used statins and roughly 9 million did not.

To evaluate the same relationship in patients with IBD, the investigators conducted a separate meta-analysis involving 15,342 patients from 5 observational studies, 1 of which was an unpublished abstract. In the 4 published studies, 1,161 patients used statins while 12,145 did not.

In the non-IBD population, statin use was associated with a 20% reduced risk of CRC (pooled odds ratio, 0.80; 95% confidence interval, 0.73-0.88; P less than .001). In patients with IBD, statin use was associated with a 60% CRC risk reduction (pooled OR, 0.40; 95% CI, 0.19-0.86, P = .019).

Dr. Singh noted “significant heterogeneity” in both analyses (I2 greater than 75), most prominently in the IBD populations, which he ascribed to “differences in demographic features, ethnic groups, and risk factors for CRC.”

While publication bias was absent from the non-IBD analysis, it was detected in the IBD portion of the study. Dr. Singh said that selection bias may also have been present in the IBD analysis, due to exclusive use of observational studies.

“Prospective trials are needed to confirm the risk reduction of CRC in the IBD population, including whether the effects of statins differ between ulcerative colitis and Crohn’s disease patients,” Dr. Singh said.

Additional analyses are underway, he added, including one that will account for the potentially confounding effect of aspirin use.

According to David E. Kaplan, MD, of the University of Pennsylvania, Philadelphia, “The finding that statins are associated with reduced CRC in IBD provides additional support for the clinical importance of the antineoplastic effects of statins. This effect has been strongly observed in liver cancer, and is pending prospective validation.”

Dr. Kaplan also offered some mechanistic insight into why statins have an anticancer effect, pointing to “the centrality of cholesterol biosynthesis for development and/or progression of malignancy.”

The investigators and Dr. Kaplan reported no relevant conflicts of interest.

New guidelines recommend against retreatment with poly (ADP-ribose) polymerase (PARP) inhibitors in women with epithelial ovarian, tubal, or primary peritoneal cancer (EOC). However, trials investigating retreatment are underway, so this recommendation may change.

The guidelines, from the American Society of Clinical Oncology (ASCO), do not recommend PARP inhibitors for the initial treatment of stage I-II EOC.

However, PARP inhibitor maintenance should be offered to women with newly diagnosed stage III-IV EOC who achieved a complete or partial response with first-line platinum-based chemotherapy, according to the guidelines. Niraparib can be offered to all women meeting those criteria, while olaparib can be considered for patients with mutations in BRCA1/2.

The guidelines, published in the Journal of Clinical Oncology, are based on a systematic review of recent randomized PARP inhibitor trials, including PRIMA and SOLO1, among others.

What’s not available now is overall survival results from key clinical trials, the guideline authors noted. They added that further research is needed to address the issue of conserving platinum sensitivity in patients with disease progression on or after PARP inhibitor maintenance.

“Given the expectation that early treatment may confer the best outcome, maintenance therapy with PARP inhibitors should be offered, with these caveats,” the authors wrote.

Olaparib can also be added to bevacizumab maintenance therapy following response to first-line chemotherapy plus bevacizumab, according to the guidelines, which also address PARP inhibitor use for women with recurrent EOC, as well as management of adverse events.

The guidelines recommend against pairing PARP inhibitors with chemotherapy, targeted therapy, or immunotherapy outside a clinical trial.
 

Which drug, which setting, which dose?

This new ASCO guidelines may help cut through the complexity of treatment decision-making for women with EOC, according to Roisin E. O’Cearbhaill, MD, of Memorial Sloan Kettering Cancer Center in New York.

“Today as clinicians, we have a whole range of opportunities to give our patients PARP inhibitors in the upfront and recurrent setting,” Dr. O’Cearbhaill said in an interview. “It is quite complicated to know which PARP inhibitor should be used in which setting and which patients.”

“We want to make sure that patients who would derive the most benefit from PARP inhibitors are offered these agents but also that we’re careful not to use PARP inhibitors in settings where there is little or no data,” added Dr. O’Cearbhaill, who was not involved in the drafting of the guidelines.

The ASCO guidelines provide a detailed review of 17 clinical trials to address key issues, including the histologic types of EOC and biomarker subsets for which PARP inhibitors are recommended in the newly diagnosed setting, as well as the settings, dose, and duration of treatment that are recommended for patients with recurrent EOC who have not yet received a PARP inhibitor.

While PARP inhibitors are generally well tolerated, some characteristic toxicities – such as anemia, neutropenia, thrombocytopenia, persistent cytopenias, and nausea – may warrant dose reductions, the guidelines state.

Special attention must be paid to low-grade adverse events since PARP inhibitors are administered continuously on a daily basis, according to the guidelines. If a dose is held because of a grade 2 adverse event, the subsequent dose should be reduced to avoid a second dose hold.

“Reescalation or resumption of the initial dose is never recommended,” the guidelines state.
 

Retreatment

Dr. O’Cearbhaill said she is eager to see future guidelines addressing PARP inhibitor retreatment following disease progression, especially since more and more patients will receive these agents in the upfront setting.

Right now, there is little data available to address PARP inhibitor retreatment. However, the ASCO guidelines do mention the ongoing OReO/ENGOT OV-38 phase 3 trial of maintenance retreatment with olaparib in women with EOC.

This study, which includes patients who previously received a PARP inhibitor and who are responding to additional platinum-based chemotherapy, has an estimated completion date in May 2021, according to details on ClinicalTrials.gov.

That’s one of several trials designed to determine how best to incorporate PARP inhibitor retreatment into the treatment paradigm, according to Dr. O’Cearbhaill.

“Even if a high proportion of patients aren’t ultimately cured by this approach, if we can delay progression of disease by the order of months or even years, whilst proactively managing side effects, it would make such a big difference for patients,” she said. “It allows them to have a better quality of life and go about their daily activities without symptomatic ovarian cancer.”

Cochairs of the ASCO expert panel for the guidelines were William P. Tew, MD, of Memorial Sloan Kettering Cancer Center in New York, and Elise C. Kohn, MD, of the National Cancer Institute in Bethesda, Md. Dr. Tew and Dr. Kohn provided no disclosures, while their coauthors reported disclosures related to Roche, AstraZeneca, Tesaro, Clovis Oncology, Merck, Seattle Genetics, and other companies. Dr. O’Cearbhaill disclosed that she is a coauthor on the PRIMA/ENGOT-OV26/GOG-3012 phase 3 clinical trial (NCT02655016) and serves on the steering committee for DUO-O (NCT0373643). She reported personal fees from Clovis, Tesaro, Regeneron, and GlaxoSmithKline.

SOURCE: Tew WP et al. J Clin Oncol. 2020 Aug 13. doi: 10.1200/JCO.20.01924.

New guidelines recommend against retreatment with poly (ADP-ribose) polymerase (PARP) inhibitors in women with epithelial ovarian, tubal, or primary peritoneal cancer (EOC). However, trials investigating retreatment are underway, so this recommendation may change.

The guidelines, from the American Society of Clinical Oncology (ASCO), do not recommend PARP inhibitors for the initial treatment of stage I-II EOC.

However, PARP inhibitor maintenance should be offered to women with newly diagnosed stage III-IV EOC who achieved a complete or partial response with first-line platinum-based chemotherapy, according to the guidelines. Niraparib can be offered to all women meeting those criteria, while olaparib can be considered for patients with mutations in BRCA1/2.

The guidelines, published in the Journal of Clinical Oncology, are based on a systematic review of recent randomized PARP inhibitor trials, including PRIMA and SOLO1, among others.

What’s not available now is overall survival results from key clinical trials, the guideline authors noted. They added that further research is needed to address the issue of conserving platinum sensitivity in patients with disease progression on or after PARP inhibitor maintenance.

“Given the expectation that early treatment may confer the best outcome, maintenance therapy with PARP inhibitors should be offered, with these caveats,” the authors wrote.

Olaparib can also be added to bevacizumab maintenance therapy following response to first-line chemotherapy plus bevacizumab, according to the guidelines, which also address PARP inhibitor use for women with recurrent EOC, as well as management of adverse events.

The guidelines recommend against pairing PARP inhibitors with chemotherapy, targeted therapy, or immunotherapy outside a clinical trial.
 

Which drug, which setting, which dose?

This new ASCO guidelines may help cut through the complexity of treatment decision-making for women with EOC, according to Roisin E. O’Cearbhaill, MD, of Memorial Sloan Kettering Cancer Center in New York.

“Today as clinicians, we have a whole range of opportunities to give our patients PARP inhibitors in the upfront and recurrent setting,” Dr. O’Cearbhaill said in an interview. “It is quite complicated to know which PARP inhibitor should be used in which setting and which patients.”

“We want to make sure that patients who would derive the most benefit from PARP inhibitors are offered these agents but also that we’re careful not to use PARP inhibitors in settings where there is little or no data,” added Dr. O’Cearbhaill, who was not involved in the drafting of the guidelines.

The ASCO guidelines provide a detailed review of 17 clinical trials to address key issues, including the histologic types of EOC and biomarker subsets for which PARP inhibitors are recommended in the newly diagnosed setting, as well as the settings, dose, and duration of treatment that are recommended for patients with recurrent EOC who have not yet received a PARP inhibitor.

While PARP inhibitors are generally well tolerated, some characteristic toxicities – such as anemia, neutropenia, thrombocytopenia, persistent cytopenias, and nausea – may warrant dose reductions, the guidelines state.

Special attention must be paid to low-grade adverse events since PARP inhibitors are administered continuously on a daily basis, according to the guidelines. If a dose is held because of a grade 2 adverse event, the subsequent dose should be reduced to avoid a second dose hold.

“Reescalation or resumption of the initial dose is never recommended,” the guidelines state.
 

Retreatment

Dr. O’Cearbhaill said she is eager to see future guidelines addressing PARP inhibitor retreatment following disease progression, especially since more and more patients will receive these agents in the upfront setting.

Right now, there is little data available to address PARP inhibitor retreatment. However, the ASCO guidelines do mention the ongoing OReO/ENGOT OV-38 phase 3 trial of maintenance retreatment with olaparib in women with EOC.

This study, which includes patients who previously received a PARP inhibitor and who are responding to additional platinum-based chemotherapy, has an estimated completion date in May 2021, according to details on ClinicalTrials.gov.

That’s one of several trials designed to determine how best to incorporate PARP inhibitor retreatment into the treatment paradigm, according to Dr. O’Cearbhaill.

“Even if a high proportion of patients aren’t ultimately cured by this approach, if we can delay progression of disease by the order of months or even years, whilst proactively managing side effects, it would make such a big difference for patients,” she said. “It allows them to have a better quality of life and go about their daily activities without symptomatic ovarian cancer.”

Cochairs of the ASCO expert panel for the guidelines were William P. Tew, MD, of Memorial Sloan Kettering Cancer Center in New York, and Elise C. Kohn, MD, of the National Cancer Institute in Bethesda, Md. Dr. Tew and Dr. Kohn provided no disclosures, while their coauthors reported disclosures related to Roche, AstraZeneca, Tesaro, Clovis Oncology, Merck, Seattle Genetics, and other companies. Dr. O’Cearbhaill disclosed that she is a coauthor on the PRIMA/ENGOT-OV26/GOG-3012 phase 3 clinical trial (NCT02655016) and serves on the steering committee for DUO-O (NCT0373643). She reported personal fees from Clovis, Tesaro, Regeneron, and GlaxoSmithKline.

SOURCE: Tew WP et al. J Clin Oncol. 2020 Aug 13. doi: 10.1200/JCO.20.01924.

New guidelines recommend against retreatment with poly (ADP-ribose) polymerase (PARP) inhibitors in women with epithelial ovarian, tubal, or primary peritoneal cancer (EOC). However, trials investigating retreatment are underway, so this recommendation may change.

The guidelines, from the American Society of Clinical Oncology (ASCO), do not recommend PARP inhibitors for the initial treatment of stage I-II EOC.

However, PARP inhibitor maintenance should be offered to women with newly diagnosed stage III-IV EOC who achieved a complete or partial response with first-line platinum-based chemotherapy, according to the guidelines. Niraparib can be offered to all women meeting those criteria, while olaparib can be considered for patients with mutations in BRCA1/2.

The guidelines, published in the Journal of Clinical Oncology, are based on a systematic review of recent randomized PARP inhibitor trials, including PRIMA and SOLO1, among others.

What’s not available now is overall survival results from key clinical trials, the guideline authors noted. They added that further research is needed to address the issue of conserving platinum sensitivity in patients with disease progression on or after PARP inhibitor maintenance.

“Given the expectation that early treatment may confer the best outcome, maintenance therapy with PARP inhibitors should be offered, with these caveats,” the authors wrote.

Olaparib can also be added to bevacizumab maintenance therapy following response to first-line chemotherapy plus bevacizumab, according to the guidelines, which also address PARP inhibitor use for women with recurrent EOC, as well as management of adverse events.

The guidelines recommend against pairing PARP inhibitors with chemotherapy, targeted therapy, or immunotherapy outside a clinical trial.
 

Which drug, which setting, which dose?

This new ASCO guidelines may help cut through the complexity of treatment decision-making for women with EOC, according to Roisin E. O’Cearbhaill, MD, of Memorial Sloan Kettering Cancer Center in New York.

“Today as clinicians, we have a whole range of opportunities to give our patients PARP inhibitors in the upfront and recurrent setting,” Dr. O’Cearbhaill said in an interview. “It is quite complicated to know which PARP inhibitor should be used in which setting and which patients.”

“We want to make sure that patients who would derive the most benefit from PARP inhibitors are offered these agents but also that we’re careful not to use PARP inhibitors in settings where there is little or no data,” added Dr. O’Cearbhaill, who was not involved in the drafting of the guidelines.

The ASCO guidelines provide a detailed review of 17 clinical trials to address key issues, including the histologic types of EOC and biomarker subsets for which PARP inhibitors are recommended in the newly diagnosed setting, as well as the settings, dose, and duration of treatment that are recommended for patients with recurrent EOC who have not yet received a PARP inhibitor.

While PARP inhibitors are generally well tolerated, some characteristic toxicities – such as anemia, neutropenia, thrombocytopenia, persistent cytopenias, and nausea – may warrant dose reductions, the guidelines state.

Special attention must be paid to low-grade adverse events since PARP inhibitors are administered continuously on a daily basis, according to the guidelines. If a dose is held because of a grade 2 adverse event, the subsequent dose should be reduced to avoid a second dose hold.

“Reescalation or resumption of the initial dose is never recommended,” the guidelines state.
 

Retreatment

Dr. O’Cearbhaill said she is eager to see future guidelines addressing PARP inhibitor retreatment following disease progression, especially since more and more patients will receive these agents in the upfront setting.

Right now, there is little data available to address PARP inhibitor retreatment. However, the ASCO guidelines do mention the ongoing OReO/ENGOT OV-38 phase 3 trial of maintenance retreatment with olaparib in women with EOC.

This study, which includes patients who previously received a PARP inhibitor and who are responding to additional platinum-based chemotherapy, has an estimated completion date in May 2021, according to details on ClinicalTrials.gov.

That’s one of several trials designed to determine how best to incorporate PARP inhibitor retreatment into the treatment paradigm, according to Dr. O’Cearbhaill.

“Even if a high proportion of patients aren’t ultimately cured by this approach, if we can delay progression of disease by the order of months or even years, whilst proactively managing side effects, it would make such a big difference for patients,” she said. “It allows them to have a better quality of life and go about their daily activities without symptomatic ovarian cancer.”

Cochairs of the ASCO expert panel for the guidelines were William P. Tew, MD, of Memorial Sloan Kettering Cancer Center in New York, and Elise C. Kohn, MD, of the National Cancer Institute in Bethesda, Md. Dr. Tew and Dr. Kohn provided no disclosures, while their coauthors reported disclosures related to Roche, AstraZeneca, Tesaro, Clovis Oncology, Merck, Seattle Genetics, and other companies. Dr. O’Cearbhaill disclosed that she is a coauthor on the PRIMA/ENGOT-OV26/GOG-3012 phase 3 clinical trial (NCT02655016) and serves on the steering committee for DUO-O (NCT0373643). She reported personal fees from Clovis, Tesaro, Regeneron, and GlaxoSmithKline.

SOURCE: Tew WP et al. J Clin Oncol. 2020 Aug 13. doi: 10.1200/JCO.20.01924.

Novel therapies are poised to dramatically change frontline therapy for acute myeloid leukemia (AML), and they have the potential to replace chemotherapy, a hematologist/oncologist told colleagues at the virtual Acute Leukemia Forum of Hemedicus.

But more work needs to be done, noted Alexander Perl, MD, MS, associate professor at the University of Pennsylvania, Philadelphia. While advances have transformed AML treatment in the relapsed/refractory setting, “we’re just not seeing that substantive improvement” for newly diagnosed patients, he said. “We need to find the disease-modifying drugs that work in the relapsed/refractory setting and move those frontline. That’s where we’re going to see the transformations.”

Research suggests that low-intensity therapy holds tremendous promise, he said, “with the idea that we could make therapy much more tolerable for the vast majority of patients affected by AML, who, as we know, are older patients.”

Dr. Perl highlighted the 2020 VIALE-A study – venetoclax/azacitidine versus azacitidine/placebo – which reported that “in previously untreated patients who were ineligible for intensive chemotherapy, overall survival was longer and the incidence of remission was higher among patients who received azacitidine plus venetoclax than among those who received azacitidine alone.”

Venetoclax promotes apoptosis in leukemia cells, Dr. Perl said. “To a certain extent, you can think of it as putting the rubber to the road in terms of what actually chemotherapy is designed to do, which is to make leukemic blasts apoptose. It does so without DNA damage and with much less toxicity to the patient. Therefore it can be added to any number of regimens – granted, with mild suppression, but with relatively little extramedullary toxicity.”

Dr. Perl noted that the venetoclax arm “showed a higher response rate than azacitidine in pretty much every subgroup that was looked at, whether patients had de novo leukemia, secondary leukemia, multiple mutational complements, various different karyotypes. The response rates on this study are as high as what we often will see with intensive chemotherapy.” He added that “the winning arm on this trial seems to hold up against any low-intensity therapy, and I would argue against many high-intensity therapies in older patients.”

As for other targeted agents, isocitrate dehydrogenase (IDH) inhibitors “are very promising drugs in the relapsed/refractory setting, which is primarily where these drugs are given. In regard to frontline treatment, “data are coming from a very small study, but they’re very encouraging. It’s hard to entirely say that we’re ready to change practice based on this. But it’s very encouraging – the idea that earlier use of a drug-targeting IDH mutation might lead to substantially better outcomes.”

Moving forward, he said, “we could put all of our eggs in one basket and use many active drugs [at] front line. Or we can perhaps be smart about sequencing these drugs one after another, or using more intensive approaches followed by maintenance approaches followed by more intensive approaches.”

This approach is similar to strategies in myeloma patients “who less and less are relying on an autologous transplant for durable control of their disease, and more and more are using low-intensity biologically targeted drugs,” he said.

The Acute Leukemia Forum is held by Hemedicus, which is owned by the same company as this news organization.

Dr. Perl reported numerous disclosures, including relationships with Daiichi Sankyo, Abbvie, and Astellas.

Novel therapies are poised to dramatically change frontline therapy for acute myeloid leukemia (AML), and they have the potential to replace chemotherapy, a hematologist/oncologist told colleagues at the virtual Acute Leukemia Forum of Hemedicus.

But more work needs to be done, noted Alexander Perl, MD, MS, associate professor at the University of Pennsylvania, Philadelphia. While advances have transformed AML treatment in the relapsed/refractory setting, “we’re just not seeing that substantive improvement” for newly diagnosed patients, he said. “We need to find the disease-modifying drugs that work in the relapsed/refractory setting and move those frontline. That’s where we’re going to see the transformations.”

Research suggests that low-intensity therapy holds tremendous promise, he said, “with the idea that we could make therapy much more tolerable for the vast majority of patients affected by AML, who, as we know, are older patients.”

Dr. Perl highlighted the 2020 VIALE-A study – venetoclax/azacitidine versus azacitidine/placebo – which reported that “in previously untreated patients who were ineligible for intensive chemotherapy, overall survival was longer and the incidence of remission was higher among patients who received azacitidine plus venetoclax than among those who received azacitidine alone.”

Venetoclax promotes apoptosis in leukemia cells, Dr. Perl said. “To a certain extent, you can think of it as putting the rubber to the road in terms of what actually chemotherapy is designed to do, which is to make leukemic blasts apoptose. It does so without DNA damage and with much less toxicity to the patient. Therefore it can be added to any number of regimens – granted, with mild suppression, but with relatively little extramedullary toxicity.”

Dr. Perl noted that the venetoclax arm “showed a higher response rate than azacitidine in pretty much every subgroup that was looked at, whether patients had de novo leukemia, secondary leukemia, multiple mutational complements, various different karyotypes. The response rates on this study are as high as what we often will see with intensive chemotherapy.” He added that “the winning arm on this trial seems to hold up against any low-intensity therapy, and I would argue against many high-intensity therapies in older patients.”

As for other targeted agents, isocitrate dehydrogenase (IDH) inhibitors “are very promising drugs in the relapsed/refractory setting, which is primarily where these drugs are given. In regard to frontline treatment, “data are coming from a very small study, but they’re very encouraging. It’s hard to entirely say that we’re ready to change practice based on this. But it’s very encouraging – the idea that earlier use of a drug-targeting IDH mutation might lead to substantially better outcomes.”

Moving forward, he said, “we could put all of our eggs in one basket and use many active drugs [at] front line. Or we can perhaps be smart about sequencing these drugs one after another, or using more intensive approaches followed by maintenance approaches followed by more intensive approaches.”

This approach is similar to strategies in myeloma patients “who less and less are relying on an autologous transplant for durable control of their disease, and more and more are using low-intensity biologically targeted drugs,” he said.

The Acute Leukemia Forum is held by Hemedicus, which is owned by the same company as this news organization.

Dr. Perl reported numerous disclosures, including relationships with Daiichi Sankyo, Abbvie, and Astellas.

Novel therapies are poised to dramatically change frontline therapy for acute myeloid leukemia (AML), and they have the potential to replace chemotherapy, a hematologist/oncologist told colleagues at the virtual Acute Leukemia Forum of Hemedicus.

But more work needs to be done, noted Alexander Perl, MD, MS, associate professor at the University of Pennsylvania, Philadelphia. While advances have transformed AML treatment in the relapsed/refractory setting, “we’re just not seeing that substantive improvement” for newly diagnosed patients, he said. “We need to find the disease-modifying drugs that work in the relapsed/refractory setting and move those frontline. That’s where we’re going to see the transformations.”

Research suggests that low-intensity therapy holds tremendous promise, he said, “with the idea that we could make therapy much more tolerable for the vast majority of patients affected by AML, who, as we know, are older patients.”

Dr. Perl highlighted the 2020 VIALE-A study – venetoclax/azacitidine versus azacitidine/placebo – which reported that “in previously untreated patients who were ineligible for intensive chemotherapy, overall survival was longer and the incidence of remission was higher among patients who received azacitidine plus venetoclax than among those who received azacitidine alone.”

Venetoclax promotes apoptosis in leukemia cells, Dr. Perl said. “To a certain extent, you can think of it as putting the rubber to the road in terms of what actually chemotherapy is designed to do, which is to make leukemic blasts apoptose. It does so without DNA damage and with much less toxicity to the patient. Therefore it can be added to any number of regimens – granted, with mild suppression, but with relatively little extramedullary toxicity.”

Dr. Perl noted that the venetoclax arm “showed a higher response rate than azacitidine in pretty much every subgroup that was looked at, whether patients had de novo leukemia, secondary leukemia, multiple mutational complements, various different karyotypes. The response rates on this study are as high as what we often will see with intensive chemotherapy.” He added that “the winning arm on this trial seems to hold up against any low-intensity therapy, and I would argue against many high-intensity therapies in older patients.”

As for other targeted agents, isocitrate dehydrogenase (IDH) inhibitors “are very promising drugs in the relapsed/refractory setting, which is primarily where these drugs are given. In regard to frontline treatment, “data are coming from a very small study, but they’re very encouraging. It’s hard to entirely say that we’re ready to change practice based on this. But it’s very encouraging – the idea that earlier use of a drug-targeting IDH mutation might lead to substantially better outcomes.”

Moving forward, he said, “we could put all of our eggs in one basket and use many active drugs [at] front line. Or we can perhaps be smart about sequencing these drugs one after another, or using more intensive approaches followed by maintenance approaches followed by more intensive approaches.”

This approach is similar to strategies in myeloma patients “who less and less are relying on an autologous transplant for durable control of their disease, and more and more are using low-intensity biologically targeted drugs,” he said.

The Acute Leukemia Forum is held by Hemedicus, which is owned by the same company as this news organization.

Dr. Perl reported numerous disclosures, including relationships with Daiichi Sankyo, Abbvie, and Astellas.

Screening for colorectal cancer (CRC) should begin at age 45 years instead of 50 years, as recommended in the current guideline, the US Preventive Services Task Force (USPSTF) said in a draft recommendation that is open for public comment.

“This is the only change that was made,” said task force member Michael Barry, MD, director of the Informed Medical Decisions Program in the Health Decision Sciences Center at Massachusetts General Hospital, Boston.

The recommendation is that all adults aged 45-75 years be screened for CRC.

This is an “A” recommendation for adults aged 50-75 and a “B” recommendation for adults aged 45-49. Dr. Barry explained that the reason for this difference is that the benefit is smaller for the 45- to 49-years age group. “But there’s not much difference between A and B from a practical standpoint,” he explained.

For adults aged 76-85, the benefits and harms of screening need to be weighed against the individual’s overall health and personal circumstances. This is a “C” recommendation.

Barry emphasized that the USPSTF document is not final. The draft recommendation and supporting evidence is posted on the task force website and will be available for public comments until Nov. 23.
 

Mounting pressure

The move comes after mounting evidence of an increase in CRC among younger adults and mounting pressure to lower the starting age.

Two years ago, the American Cancer Society (ACS) revised its own screening guidelines and lowered the starting age to 45 years. Soon afterward, a coalition of 22 public health and patient advocacy groups joined the ACS in submitting a letter to the USPSTF asking that the task force reconsider its 2016 guidance (which recommends starting at age 50 years).

The starting age for screening is an important issue, commented Judy Yee, MD, chair of radiology at the Albert Einstein College of Medicine and the Montefiore Health System in New York and chair of the Colon Cancer Committee of the American College of Radiology.

“Right now it is very confusing to physicians and to the public,” Dr. Yee said in an interview at that time. “The USPSTF and the ACS differ as far as the age to begin screening, and insurers may not cover the cost of colorectal cancer screening before age 50.”

Dr. Barry said that the Task Force took notice of recent data showing an increase in the incidence of CRC among younger adults. “The risk now for age 45 to 49 is pretty similar to the risk for people in their early 50s. So in some ways, today’s late 40-year-olds are like yesterday’s 50-year-olds,” he commented.

The task force used simulation models that confirmed what the epidemiologic data suggested and “that we could prevent some additional colorectal cancer deaths by starting screening at age 45,” he said.

The rest of the new draft recommendation is similar to the 2016 guidelines, in which the task force says there is convincing evidence that CRC screening substantially reduces disease-related mortality. However, it does not recommend any one screening approach over another. It recommends both direct visualization, such as colonoscopy, as well as noninvasive stool-based tests. It does not recommend serum tests, urine tests, or capsule endoscopy because there is not yet enough evidence about the benefits and harms of these tests.

“The right test is the one a patient will do,” Dr. Barry commented.

Defining populations

CRC in young adults made the news in August 2020 when Chadwick Boseman, known for his role as King T’Challa in Marvel’s “Black Panther,” died of colon cancer. Diagnosed in 2016, he was only 43 years old.

“The recent passing of Chadwick Boseman is tragic, and our thoughts are with his loved ones during this difficult time,” said Dr. Barry. “As a Black man, the data show that Chadwick was at higher risk for developing colorectal cancer.”

Unfortunately, there is currently not enough evidence that screening Black men younger than 45 could help prevent tragic deaths such as Chadwick’s, he commented. “The task force is calling for more research on colorectal cancer screening in Black adults,” he added.
 

Limit screening to those at higher risk

In contrast to the USPSTF and ACS guidelines, which recommend screening for CRC for everyone over a certain age, a set of recommendations developed by an international panel of experts suggests screening only for individuals who are at higher risk for CRC.

As previously reported, these guidelines suggest restricting screening to adults whose cumulative cancer risk is 3% or more in the next 15 years, the point at which the balance between benefits and harms favors screening.

The authors, led by Lise Helsingen, MD, Clinical Effectiveness Research Group, University of Oslo, said “the optimal choice for each person requires shared decision-making.”

Such a risk-based approach is “increasingly regarded as the most appropriate way to discuss cancer screening.” That approach is already used in prostate and lung cancer screening, they noted.
 

A version of this article originally appeared on Medscape.com.

Screening for colorectal cancer (CRC) should begin at age 45 years instead of 50 years, as recommended in the current guideline, the US Preventive Services Task Force (USPSTF) said in a draft recommendation that is open for public comment.

“This is the only change that was made,” said task force member Michael Barry, MD, director of the Informed Medical Decisions Program in the Health Decision Sciences Center at Massachusetts General Hospital, Boston.

The recommendation is that all adults aged 45-75 years be screened for CRC.

This is an “A” recommendation for adults aged 50-75 and a “B” recommendation for adults aged 45-49. Dr. Barry explained that the reason for this difference is that the benefit is smaller for the 45- to 49-years age group. “But there’s not much difference between A and B from a practical standpoint,” he explained.

For adults aged 76-85, the benefits and harms of screening need to be weighed against the individual’s overall health and personal circumstances. This is a “C” recommendation.

Barry emphasized that the USPSTF document is not final. The draft recommendation and supporting evidence is posted on the task force website and will be available for public comments until Nov. 23.
 

Mounting pressure

The move comes after mounting evidence of an increase in CRC among younger adults and mounting pressure to lower the starting age.

Two years ago, the American Cancer Society (ACS) revised its own screening guidelines and lowered the starting age to 45 years. Soon afterward, a coalition of 22 public health and patient advocacy groups joined the ACS in submitting a letter to the USPSTF asking that the task force reconsider its 2016 guidance (which recommends starting at age 50 years).

The starting age for screening is an important issue, commented Judy Yee, MD, chair of radiology at the Albert Einstein College of Medicine and the Montefiore Health System in New York and chair of the Colon Cancer Committee of the American College of Radiology.

“Right now it is very confusing to physicians and to the public,” Dr. Yee said in an interview at that time. “The USPSTF and the ACS differ as far as the age to begin screening, and insurers may not cover the cost of colorectal cancer screening before age 50.”

Dr. Barry said that the Task Force took notice of recent data showing an increase in the incidence of CRC among younger adults. “The risk now for age 45 to 49 is pretty similar to the risk for people in their early 50s. So in some ways, today’s late 40-year-olds are like yesterday’s 50-year-olds,” he commented.

The task force used simulation models that confirmed what the epidemiologic data suggested and “that we could prevent some additional colorectal cancer deaths by starting screening at age 45,” he said.

The rest of the new draft recommendation is similar to the 2016 guidelines, in which the task force says there is convincing evidence that CRC screening substantially reduces disease-related mortality. However, it does not recommend any one screening approach over another. It recommends both direct visualization, such as colonoscopy, as well as noninvasive stool-based tests. It does not recommend serum tests, urine tests, or capsule endoscopy because there is not yet enough evidence about the benefits and harms of these tests.

“The right test is the one a patient will do,” Dr. Barry commented.

Defining populations

CRC in young adults made the news in August 2020 when Chadwick Boseman, known for his role as King T’Challa in Marvel’s “Black Panther,” died of colon cancer. Diagnosed in 2016, he was only 43 years old.

“The recent passing of Chadwick Boseman is tragic, and our thoughts are with his loved ones during this difficult time,” said Dr. Barry. “As a Black man, the data show that Chadwick was at higher risk for developing colorectal cancer.”

Unfortunately, there is currently not enough evidence that screening Black men younger than 45 could help prevent tragic deaths such as Chadwick’s, he commented. “The task force is calling for more research on colorectal cancer screening in Black adults,” he added.
 

Limit screening to those at higher risk

In contrast to the USPSTF and ACS guidelines, which recommend screening for CRC for everyone over a certain age, a set of recommendations developed by an international panel of experts suggests screening only for individuals who are at higher risk for CRC.

As previously reported, these guidelines suggest restricting screening to adults whose cumulative cancer risk is 3% or more in the next 15 years, the point at which the balance between benefits and harms favors screening.

The authors, led by Lise Helsingen, MD, Clinical Effectiveness Research Group, University of Oslo, said “the optimal choice for each person requires shared decision-making.”

Such a risk-based approach is “increasingly regarded as the most appropriate way to discuss cancer screening.” That approach is already used in prostate and lung cancer screening, they noted.
 

A version of this article originally appeared on Medscape.com.

Screening for colorectal cancer (CRC) should begin at age 45 years instead of 50 years, as recommended in the current guideline, the US Preventive Services Task Force (USPSTF) said in a draft recommendation that is open for public comment.

“This is the only change that was made,” said task force member Michael Barry, MD, director of the Informed Medical Decisions Program in the Health Decision Sciences Center at Massachusetts General Hospital, Boston.

The recommendation is that all adults aged 45-75 years be screened for CRC.

This is an “A” recommendation for adults aged 50-75 and a “B” recommendation for adults aged 45-49. Dr. Barry explained that the reason for this difference is that the benefit is smaller for the 45- to 49-years age group. “But there’s not much difference between A and B from a practical standpoint,” he explained.

For adults aged 76-85, the benefits and harms of screening need to be weighed against the individual’s overall health and personal circumstances. This is a “C” recommendation.

Barry emphasized that the USPSTF document is not final. The draft recommendation and supporting evidence is posted on the task force website and will be available for public comments until Nov. 23.
 

Mounting pressure

The move comes after mounting evidence of an increase in CRC among younger adults and mounting pressure to lower the starting age.

Two years ago, the American Cancer Society (ACS) revised its own screening guidelines and lowered the starting age to 45 years. Soon afterward, a coalition of 22 public health and patient advocacy groups joined the ACS in submitting a letter to the USPSTF asking that the task force reconsider its 2016 guidance (which recommends starting at age 50 years).

The starting age for screening is an important issue, commented Judy Yee, MD, chair of radiology at the Albert Einstein College of Medicine and the Montefiore Health System in New York and chair of the Colon Cancer Committee of the American College of Radiology.

“Right now it is very confusing to physicians and to the public,” Dr. Yee said in an interview at that time. “The USPSTF and the ACS differ as far as the age to begin screening, and insurers may not cover the cost of colorectal cancer screening before age 50.”

Dr. Barry said that the Task Force took notice of recent data showing an increase in the incidence of CRC among younger adults. “The risk now for age 45 to 49 is pretty similar to the risk for people in their early 50s. So in some ways, today’s late 40-year-olds are like yesterday’s 50-year-olds,” he commented.

The task force used simulation models that confirmed what the epidemiologic data suggested and “that we could prevent some additional colorectal cancer deaths by starting screening at age 45,” he said.

The rest of the new draft recommendation is similar to the 2016 guidelines, in which the task force says there is convincing evidence that CRC screening substantially reduces disease-related mortality. However, it does not recommend any one screening approach over another. It recommends both direct visualization, such as colonoscopy, as well as noninvasive stool-based tests. It does not recommend serum tests, urine tests, or capsule endoscopy because there is not yet enough evidence about the benefits and harms of these tests.

“The right test is the one a patient will do,” Dr. Barry commented.

Defining populations

CRC in young adults made the news in August 2020 when Chadwick Boseman, known for his role as King T’Challa in Marvel’s “Black Panther,” died of colon cancer. Diagnosed in 2016, he was only 43 years old.

“The recent passing of Chadwick Boseman is tragic, and our thoughts are with his loved ones during this difficult time,” said Dr. Barry. “As a Black man, the data show that Chadwick was at higher risk for developing colorectal cancer.”

Unfortunately, there is currently not enough evidence that screening Black men younger than 45 could help prevent tragic deaths such as Chadwick’s, he commented. “The task force is calling for more research on colorectal cancer screening in Black adults,” he added.
 

Limit screening to those at higher risk

In contrast to the USPSTF and ACS guidelines, which recommend screening for CRC for everyone over a certain age, a set of recommendations developed by an international panel of experts suggests screening only for individuals who are at higher risk for CRC.

As previously reported, these guidelines suggest restricting screening to adults whose cumulative cancer risk is 3% or more in the next 15 years, the point at which the balance between benefits and harms favors screening.

The authors, led by Lise Helsingen, MD, Clinical Effectiveness Research Group, University of Oslo, said “the optimal choice for each person requires shared decision-making.”

Such a risk-based approach is “increasingly regarded as the most appropriate way to discuss cancer screening.” That approach is already used in prostate and lung cancer screening, they noted.
 

A version of this article originally appeared on Medscape.com.

A national effort to perform genotype drug matching across cancer types shows the value of next-generation sequencing and provides a roadmap for future precision oncology trials, according to experts.

Massachusetts General Hospital

The effort is the National Cancer Institute Molecular Analysis for Therapy Choice (NCI-MATCH) trial. For this study, researchers performed next-generation sequencing on tumor biopsy specimens to identify therapeutically actionable molecular alterations in patients with “underexplored” cancer types.

The trial included 5,954 patients with cancers that had progressed on standard treatments or rare cancers for which there is no standard treatment. If actionable alterations were found in these patients, they could receive new drugs in development that showed promise in other clinical trials or drugs that were approved by the Food and Drug Administration to treat at least one cancer type.

Data newly reported in the Journal of Clinical Oncology showed that 37.6% of patients had alterations that could be matched to targeted drugs, and 17.8% of patients were assigned to targeted treatment. Multiple actionable tumor mutations were seen in 11.9% of specimens, and resistance-conferring mutations were seen in 71.3% of specimens.

“The bottom line from this report is that next-generation sequencing is an efficient way to identify both approved and promising investigational therapies. For this reason, it should be considered standard of care for patients with advanced cancers,” said study chair Keith T. Flaherty, MD, director of the Henri and Belinda Termeer Center for Targeted Therapy at Massachusetts General Hospital Cancer Center in Boston.

“This study sets the benchmark for the ‘actionability’ of next-generation sequencing,” Dr. Flaherty added. “We expect this number [of actionable alterations] will continue to rise steadily as further advances are made in the development of therapies that target some of the genetic alterations for which we could not offer treatment options in NCI-MATCH.”
 

Relapsed/refractory vs. primary tumors

The NCI-MATCH researchers focused on the most commonly found genetic alterations and performed biopsies at study entry to provide the most accurate picture of the genetic landscape of relapsed/refractory cancer patients. That makes this cohort distinct from The Cancer Genome Atlas (TCGA), a database of patients with mostly untreated primary tumors, and other published cohorts that include genetic analysis of primary tumors and biopsies from the time of initial metastatic recurrence.

The researchers compared the tumor gene makeup of NCI-MATCH and TCGA patients with seven cancer types – breast, bile duct, cervix, colorectal, lung, pancreas, and prostate.

ECOG-ACRIN Cancer Research Group

“Perhaps the biggest surprise was the relatively minimal change in the genetic alterations found in these relapsed/refractory patients, compared to primary tumors,” Dr. Flaherty said. “These findings suggest that it is very reasonable to perform next-generation sequencing at the time of initial metastatic cancer diagnosis and to rely on those findings for the purposes of considering FDA-approved therapies and clinical trial participation.”
 

Multiple alterations and resistance

The complex genetics of cancers has led researchers to explore combinations of targeted and other therapies to address multiple defects at the same time.

“Not surprisingly, the most common collision of multiple genetic alterations within the same tumor was in the commonly altered tumor suppressor genes: TP53, APC, and PTEN,” Dr. Flaherty said.

“An increasing body of evidence supports a role for loss-of-function alterations in these genes to confer resistance to many targeted therapies,” he added. “While we don’t have targeted therapies yet established to directly counter this form of therapeutic resistance, we hypothesize that various types of combination therapy may be able to indirectly undercut resistance and enhance the benefit of many targeted therapies.”

The NCI-MATCH researchers will continue to mine this large dataset to better understand the many small, genetically defined cancer subpopulations.

“We will continue to report the outcome of the individual treatment subprotocols, and combining this genetic analysis with those outcomes will likely inform the next clinical trials,” Dr. Flaherty said.
 

Actionable mutations make a difference

Precision oncology experts agree that NCI-MATCH results are impressive and add a fuller appreciation that actionable mutations make a clinical difference.

“This is a powerful, extremely well-designed study, a tour de force of collaborative science,” said Stephen Gruber, MD, PhD, director of the Center for Precision Medicine at City of Hope National Medical Center in Duarte, Calif.

“The future holds even more promise,” he added. “Our ability to interrogate the genomic landscape of cancer is improving rapidly. Tumor testing helps get the right drug to the right tumor faster than a guidelines-based approach from historical data of combination chemotherapy. This is a likely game changer for the way oncologists will practice in the future, especially as we learn more results of subset trials. The NCI-MATCH researchers have taken a laser-focused look at the current data, but we now know we can look far more comprehensively at genomic profiles of tumors.”

From the viewpoint of the practicing oncologist, co-occurring resistance mutations make a difference in defining what combinations are likely and, more importantly, less likely to be effective. “When we see two mutations and one is likely to confer resistance, we can make a choice to avoid a drug that is not likely to work,” Dr. Gruber said.

“The NCI-MATCH trial allows both approved and investigational agents, which expands the possibility of matching patients to newer agents. This is especially relevant if there are no FDA-approved drugs yet for some molecular aberrations,” said Lillian L. Siu, MD, a senior medical oncologist at the Princess Margaret Cancer Centre in Toronto. “This trial enables such evaluations under the auspice of a clinical trial to provide important knowledge.”

Both experts agree that in-depth biological interrogations of cancer will move the field of precision oncology forward. Dr. Gruber said that “studies have not yet fully addressed the power of germline genetic testing of DNA. Inherited susceptibility will drive therapeutic choices – for example, PARP inhibitors that access homologous recombination deficiency for breast, ovarian, and prostate cancer. We will learn more about treatment choices for those cancers.”

Dr. Siu added: “I truly believe that liquid biopsies [circulating tumor DNA] will help us perform target-drug matching in a less invasive way. We need to explore beyond the genome to look at the transcriptome, proteome, epigenome, and immunome, among others. It is likely that multiomic predictors are going to be able to identify more therapeutic options compared to single genomic predictors.”

Dr. Flaherty noted that all tumor samples from patients assigned to treatment are being subjected to whole-exome sequencing to further the discovery of the genetic features of responsive and nonresponsive tumors.

NCI-MATCH was funded by the National Cancer Institute. Dr. Flaherty disclosed relationships with Clovis Oncology, Loxo, X4 Pharma, and many other companies. His coauthors disclosed many conflicts as well. Dr. Gruber is cofounder of Brogent International. Dr. Siu disclosed relationships with Agios, Treadwell Therapeutics, Merck, Pfizer, and many other companies.

SOURCE: Flaherty KT et al. J Clin Oncol. 2020 Oct 13. doi: 10.1200/JCO.19.03010.

A national effort to perform genotype drug matching across cancer types shows the value of next-generation sequencing and provides a roadmap for future precision oncology trials, according to experts.

Massachusetts General Hospital

The effort is the National Cancer Institute Molecular Analysis for Therapy Choice (NCI-MATCH) trial. For this study, researchers performed next-generation sequencing on tumor biopsy specimens to identify therapeutically actionable molecular alterations in patients with “underexplored” cancer types.

The trial included 5,954 patients with cancers that had progressed on standard treatments or rare cancers for which there is no standard treatment. If actionable alterations were found in these patients, they could receive new drugs in development that showed promise in other clinical trials or drugs that were approved by the Food and Drug Administration to treat at least one cancer type.

Data newly reported in the Journal of Clinical Oncology showed that 37.6% of patients had alterations that could be matched to targeted drugs, and 17.8% of patients were assigned to targeted treatment. Multiple actionable tumor mutations were seen in 11.9% of specimens, and resistance-conferring mutations were seen in 71.3% of specimens.

“The bottom line from this report is that next-generation sequencing is an efficient way to identify both approved and promising investigational therapies. For this reason, it should be considered standard of care for patients with advanced cancers,” said study chair Keith T. Flaherty, MD, director of the Henri and Belinda Termeer Center for Targeted Therapy at Massachusetts General Hospital Cancer Center in Boston.

“This study sets the benchmark for the ‘actionability’ of next-generation sequencing,” Dr. Flaherty added. “We expect this number [of actionable alterations] will continue to rise steadily as further advances are made in the development of therapies that target some of the genetic alterations for which we could not offer treatment options in NCI-MATCH.”
 

Relapsed/refractory vs. primary tumors

The NCI-MATCH researchers focused on the most commonly found genetic alterations and performed biopsies at study entry to provide the most accurate picture of the genetic landscape of relapsed/refractory cancer patients. That makes this cohort distinct from The Cancer Genome Atlas (TCGA), a database of patients with mostly untreated primary tumors, and other published cohorts that include genetic analysis of primary tumors and biopsies from the time of initial metastatic recurrence.

The researchers compared the tumor gene makeup of NCI-MATCH and TCGA patients with seven cancer types – breast, bile duct, cervix, colorectal, lung, pancreas, and prostate.

ECOG-ACRIN Cancer Research Group

“Perhaps the biggest surprise was the relatively minimal change in the genetic alterations found in these relapsed/refractory patients, compared to primary tumors,” Dr. Flaherty said. “These findings suggest that it is very reasonable to perform next-generation sequencing at the time of initial metastatic cancer diagnosis and to rely on those findings for the purposes of considering FDA-approved therapies and clinical trial participation.”
 

Multiple alterations and resistance

The complex genetics of cancers has led researchers to explore combinations of targeted and other therapies to address multiple defects at the same time.

“Not surprisingly, the most common collision of multiple genetic alterations within the same tumor was in the commonly altered tumor suppressor genes: TP53, APC, and PTEN,” Dr. Flaherty said.

“An increasing body of evidence supports a role for loss-of-function alterations in these genes to confer resistance to many targeted therapies,” he added. “While we don’t have targeted therapies yet established to directly counter this form of therapeutic resistance, we hypothesize that various types of combination therapy may be able to indirectly undercut resistance and enhance the benefit of many targeted therapies.”

The NCI-MATCH researchers will continue to mine this large dataset to better understand the many small, genetically defined cancer subpopulations.

“We will continue to report the outcome of the individual treatment subprotocols, and combining this genetic analysis with those outcomes will likely inform the next clinical trials,” Dr. Flaherty said.
 

Actionable mutations make a difference

Precision oncology experts agree that NCI-MATCH results are impressive and add a fuller appreciation that actionable mutations make a clinical difference.

“This is a powerful, extremely well-designed study, a tour de force of collaborative science,” said Stephen Gruber, MD, PhD, director of the Center for Precision Medicine at City of Hope National Medical Center in Duarte, Calif.

“The future holds even more promise,” he added. “Our ability to interrogate the genomic landscape of cancer is improving rapidly. Tumor testing helps get the right drug to the right tumor faster than a guidelines-based approach from historical data of combination chemotherapy. This is a likely game changer for the way oncologists will practice in the future, especially as we learn more results of subset trials. The NCI-MATCH researchers have taken a laser-focused look at the current data, but we now know we can look far more comprehensively at genomic profiles of tumors.”

From the viewpoint of the practicing oncologist, co-occurring resistance mutations make a difference in defining what combinations are likely and, more importantly, less likely to be effective. “When we see two mutations and one is likely to confer resistance, we can make a choice to avoid a drug that is not likely to work,” Dr. Gruber said.

“The NCI-MATCH trial allows both approved and investigational agents, which expands the possibility of matching patients to newer agents. This is especially relevant if there are no FDA-approved drugs yet for some molecular aberrations,” said Lillian L. Siu, MD, a senior medical oncologist at the Princess Margaret Cancer Centre in Toronto. “This trial enables such evaluations under the auspice of a clinical trial to provide important knowledge.”

Both experts agree that in-depth biological interrogations of cancer will move the field of precision oncology forward. Dr. Gruber said that “studies have not yet fully addressed the power of germline genetic testing of DNA. Inherited susceptibility will drive therapeutic choices – for example, PARP inhibitors that access homologous recombination deficiency for breast, ovarian, and prostate cancer. We will learn more about treatment choices for those cancers.”

Dr. Siu added: “I truly believe that liquid biopsies [circulating tumor DNA] will help us perform target-drug matching in a less invasive way. We need to explore beyond the genome to look at the transcriptome, proteome, epigenome, and immunome, among others. It is likely that multiomic predictors are going to be able to identify more therapeutic options compared to single genomic predictors.”

Dr. Flaherty noted that all tumor samples from patients assigned to treatment are being subjected to whole-exome sequencing to further the discovery of the genetic features of responsive and nonresponsive tumors.

NCI-MATCH was funded by the National Cancer Institute. Dr. Flaherty disclosed relationships with Clovis Oncology, Loxo, X4 Pharma, and many other companies. His coauthors disclosed many conflicts as well. Dr. Gruber is cofounder of Brogent International. Dr. Siu disclosed relationships with Agios, Treadwell Therapeutics, Merck, Pfizer, and many other companies.

SOURCE: Flaherty KT et al. J Clin Oncol. 2020 Oct 13. doi: 10.1200/JCO.19.03010.

A national effort to perform genotype drug matching across cancer types shows the value of next-generation sequencing and provides a roadmap for future precision oncology trials, according to experts.

Massachusetts General Hospital

The effort is the National Cancer Institute Molecular Analysis for Therapy Choice (NCI-MATCH) trial. For this study, researchers performed next-generation sequencing on tumor biopsy specimens to identify therapeutically actionable molecular alterations in patients with “underexplored” cancer types.

The trial included 5,954 patients with cancers that had progressed on standard treatments or rare cancers for which there is no standard treatment. If actionable alterations were found in these patients, they could receive new drugs in development that showed promise in other clinical trials or drugs that were approved by the Food and Drug Administration to treat at least one cancer type.

Data newly reported in the Journal of Clinical Oncology showed that 37.6% of patients had alterations that could be matched to targeted drugs, and 17.8% of patients were assigned to targeted treatment. Multiple actionable tumor mutations were seen in 11.9% of specimens, and resistance-conferring mutations were seen in 71.3% of specimens.

“The bottom line from this report is that next-generation sequencing is an efficient way to identify both approved and promising investigational therapies. For this reason, it should be considered standard of care for patients with advanced cancers,” said study chair Keith T. Flaherty, MD, director of the Henri and Belinda Termeer Center for Targeted Therapy at Massachusetts General Hospital Cancer Center in Boston.

“This study sets the benchmark for the ‘actionability’ of next-generation sequencing,” Dr. Flaherty added. “We expect this number [of actionable alterations] will continue to rise steadily as further advances are made in the development of therapies that target some of the genetic alterations for which we could not offer treatment options in NCI-MATCH.”
 

Relapsed/refractory vs. primary tumors

The NCI-MATCH researchers focused on the most commonly found genetic alterations and performed biopsies at study entry to provide the most accurate picture of the genetic landscape of relapsed/refractory cancer patients. That makes this cohort distinct from The Cancer Genome Atlas (TCGA), a database of patients with mostly untreated primary tumors, and other published cohorts that include genetic analysis of primary tumors and biopsies from the time of initial metastatic recurrence.

The researchers compared the tumor gene makeup of NCI-MATCH and TCGA patients with seven cancer types – breast, bile duct, cervix, colorectal, lung, pancreas, and prostate.

ECOG-ACRIN Cancer Research Group

“Perhaps the biggest surprise was the relatively minimal change in the genetic alterations found in these relapsed/refractory patients, compared to primary tumors,” Dr. Flaherty said. “These findings suggest that it is very reasonable to perform next-generation sequencing at the time of initial metastatic cancer diagnosis and to rely on those findings for the purposes of considering FDA-approved therapies and clinical trial participation.”
 

Multiple alterations and resistance

The complex genetics of cancers has led researchers to explore combinations of targeted and other therapies to address multiple defects at the same time.

“Not surprisingly, the most common collision of multiple genetic alterations within the same tumor was in the commonly altered tumor suppressor genes: TP53, APC, and PTEN,” Dr. Flaherty said.

“An increasing body of evidence supports a role for loss-of-function alterations in these genes to confer resistance to many targeted therapies,” he added. “While we don’t have targeted therapies yet established to directly counter this form of therapeutic resistance, we hypothesize that various types of combination therapy may be able to indirectly undercut resistance and enhance the benefit of many targeted therapies.”

The NCI-MATCH researchers will continue to mine this large dataset to better understand the many small, genetically defined cancer subpopulations.

“We will continue to report the outcome of the individual treatment subprotocols, and combining this genetic analysis with those outcomes will likely inform the next clinical trials,” Dr. Flaherty said.
 

Actionable mutations make a difference

Precision oncology experts agree that NCI-MATCH results are impressive and add a fuller appreciation that actionable mutations make a clinical difference.

“This is a powerful, extremely well-designed study, a tour de force of collaborative science,” said Stephen Gruber, MD, PhD, director of the Center for Precision Medicine at City of Hope National Medical Center in Duarte, Calif.

“The future holds even more promise,” he added. “Our ability to interrogate the genomic landscape of cancer is improving rapidly. Tumor testing helps get the right drug to the right tumor faster than a guidelines-based approach from historical data of combination chemotherapy. This is a likely game changer for the way oncologists will practice in the future, especially as we learn more results of subset trials. The NCI-MATCH researchers have taken a laser-focused look at the current data, but we now know we can look far more comprehensively at genomic profiles of tumors.”

From the viewpoint of the practicing oncologist, co-occurring resistance mutations make a difference in defining what combinations are likely and, more importantly, less likely to be effective. “When we see two mutations and one is likely to confer resistance, we can make a choice to avoid a drug that is not likely to work,” Dr. Gruber said.

“The NCI-MATCH trial allows both approved and investigational agents, which expands the possibility of matching patients to newer agents. This is especially relevant if there are no FDA-approved drugs yet for some molecular aberrations,” said Lillian L. Siu, MD, a senior medical oncologist at the Princess Margaret Cancer Centre in Toronto. “This trial enables such evaluations under the auspice of a clinical trial to provide important knowledge.”

Both experts agree that in-depth biological interrogations of cancer will move the field of precision oncology forward. Dr. Gruber said that “studies have not yet fully addressed the power of germline genetic testing of DNA. Inherited susceptibility will drive therapeutic choices – for example, PARP inhibitors that access homologous recombination deficiency for breast, ovarian, and prostate cancer. We will learn more about treatment choices for those cancers.”

Dr. Siu added: “I truly believe that liquid biopsies [circulating tumor DNA] will help us perform target-drug matching in a less invasive way. We need to explore beyond the genome to look at the transcriptome, proteome, epigenome, and immunome, among others. It is likely that multiomic predictors are going to be able to identify more therapeutic options compared to single genomic predictors.”

Dr. Flaherty noted that all tumor samples from patients assigned to treatment are being subjected to whole-exome sequencing to further the discovery of the genetic features of responsive and nonresponsive tumors.

NCI-MATCH was funded by the National Cancer Institute. Dr. Flaherty disclosed relationships with Clovis Oncology, Loxo, X4 Pharma, and many other companies. His coauthors disclosed many conflicts as well. Dr. Gruber is cofounder of Brogent International. Dr. Siu disclosed relationships with Agios, Treadwell Therapeutics, Merck, Pfizer, and many other companies.

SOURCE: Flaherty KT et al. J Clin Oncol. 2020 Oct 13. doi: 10.1200/JCO.19.03010.

It’s not ready for the clinic, but new research suggests that angiotensin receptor II blockers (ARBs) widely used to treat hypertension may improve responses to cancer immunotherapy agents targeted against the programmed death-1/ligand-1 (PD-1/PD-L1) pathway.

That conclusion comes from an observational study of 597 patients with more than 3 dozen different cancer types treated in clinical trials at the US National Institutes of Health. Investigators found that both objective response rates and 3-year overall survival (OS) rates were significantly higher for patients treated with a PD-1/PD-L1 inhibitor who were on ARBs, compared with patients who weren’t taking the antihypertensive agents.

An association was also seen between higher ORR and OS rates for patients taking ACE inhibitors, but it was not statistically significant, reported Julius Strauss, MD, from the Center for Cancer Research at the National Cancer Institute in Bethesda, Md.

All study patients received PD-1/PD-L1 inhibitors, and the ORR for patients treated with ARBs was 33.8%, compared with 19.5% for those treated with ACE inhibitors, and 17% for those who took neither drug. The respective complete response (CR) rates were 11.3%, 3.7%, and 3.1%.

Strauss discussed the data during an online briefing prior to his presentation of the findings during the 32nd EORTC-NCI-AACR Symposium on Molecular Targets and Cancer Therapeutics, which is taking place virtually.

Several early studies have suggested that angiotensin II, in addition to its effect on blood pressure, can also affect cancer growth by leading to downstream production of two proteins: vascular endothelial growth factor (VEGF) and transforming growth factor–beta (TGF-beta), he explained.

“Both of these [proteins] have been linked to cancer growth and cancer resistance to immune system attack,” Strauss observed.

He also discussed the mechanics of possible effects. Angiotensin II increases VEGF and TGF-beta through binding to the AT1 receptor, but has the opposite effect when it binds to the AT2 receptor, resulting in a decrease in both of the growth factors, he added.

ACE inhibitors prevent the conversion of angiotensin I to angiotensin II, with the result being that the drugs indirectly block both the AT1 and AT2 receptors.

In contrast, ARBs block only the AT1 receptor and leave the AT2 counter-regulatory receptor alone, said Strauss.
 

More data, including on overall survival

Strauss and colleagues examined whether ACE inhibitors and/or ARBs could have an effect on the response to PD-1/PD-L1 immune checkpoint inhibitors delivered with or without other immunotherapies, such as anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) checkpoint inhibitors, or targeted agents such as tyrosine kinase inhibitors (TKIs).

They pooled data on 597 patients receiving PD-1/PD-L1 inhibitors in clinical trials for various cancers, including 71 receiving concomitant ARBs, 82 receiving an ACE inhibitor, and 444 who were not receiving either class of antihypertensives.

The above-mentioned improvement in ORR with ARBs compared with patients not receiving the drug was statistically significant (P = .001), as was the improvement in CR rates (P = .002). In contrast, neither ORR nor CR were significantly better with patients on ACE inhibitors compared with patients not taking these drugs.

In multiple regression analysis controlling for age, gender, body mass index (BMI), tumor type, and additional therapies given, the superior ORR and CR rates with ARBs remained (P = .039 and .002, respectively), while there continued to be no significant additional benefit with ACE inhibitors.

The median overall survival was 35.2 months for patients on ARBs, 26.2 months for those on ACE inhibitors, and 18.8 months for patients on neither drug. The respective 3-year OS rates were 48.1%, 37.2%, and 31.5%, with the difference between the ARB and no-drug groups being significant (P = .0078).

In regression analysis controlling for the factors mentioned before, the OS advantage with ARBs but not ACE inhibitors remained significant (P = .006 for ARBs, and .078 for ACE inhibitors).

Strauss emphasized that further study is needed to determine if AT1 blockade can improve outcomes when combined anti-PD-1/PD-L1-based therapy.

It might be reasonable for patients who are taking ACE inhibitors to control blood pressure and are also receiving immunotherapy with a PD-1/PD-L1 inhibitor to be switched to an ARB if it is deemed safe and if further research bears it out, said Strauss in response to a question from Medscape Medical News.
 

Hypothesis-generating study

Meeting cochair Emiliano Calvo, MD, PhD, from Hospital de Madrid Norte Sanchinarro in Madrid, who attended the media briefing but was not involved in the study, commented that hypothesis-generating research using drugs already on the market for other indications adds important value to cancer therapy.

James Gulley, MD, PhD, from the Center for Cancer Research at the NCI, also a meeting cochair, agreed with Calvo.

“Thinking about utilizing the data that already exists to really get hypothesis-generating questions, it also opens up the possibility for real-world data, real-world evidence from these big datasets from [electronic medical records] that we could really interrogate and understand what we might see and get these hypothesis-generating findings that we could then prospectively evaluate,” Gulley said.

The research was funded by the National Cancer Institute. Strauss and Gulley are National Cancer Institute employees. Calvo disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

It’s not ready for the clinic, but new research suggests that angiotensin receptor II blockers (ARBs) widely used to treat hypertension may improve responses to cancer immunotherapy agents targeted against the programmed death-1/ligand-1 (PD-1/PD-L1) pathway.

That conclusion comes from an observational study of 597 patients with more than 3 dozen different cancer types treated in clinical trials at the US National Institutes of Health. Investigators found that both objective response rates and 3-year overall survival (OS) rates were significantly higher for patients treated with a PD-1/PD-L1 inhibitor who were on ARBs, compared with patients who weren’t taking the antihypertensive agents.

An association was also seen between higher ORR and OS rates for patients taking ACE inhibitors, but it was not statistically significant, reported Julius Strauss, MD, from the Center for Cancer Research at the National Cancer Institute in Bethesda, Md.

All study patients received PD-1/PD-L1 inhibitors, and the ORR for patients treated with ARBs was 33.8%, compared with 19.5% for those treated with ACE inhibitors, and 17% for those who took neither drug. The respective complete response (CR) rates were 11.3%, 3.7%, and 3.1%.

Strauss discussed the data during an online briefing prior to his presentation of the findings during the 32nd EORTC-NCI-AACR Symposium on Molecular Targets and Cancer Therapeutics, which is taking place virtually.

Several early studies have suggested that angiotensin II, in addition to its effect on blood pressure, can also affect cancer growth by leading to downstream production of two proteins: vascular endothelial growth factor (VEGF) and transforming growth factor–beta (TGF-beta), he explained.

“Both of these [proteins] have been linked to cancer growth and cancer resistance to immune system attack,” Strauss observed.

He also discussed the mechanics of possible effects. Angiotensin II increases VEGF and TGF-beta through binding to the AT1 receptor, but has the opposite effect when it binds to the AT2 receptor, resulting in a decrease in both of the growth factors, he added.

ACE inhibitors prevent the conversion of angiotensin I to angiotensin II, with the result being that the drugs indirectly block both the AT1 and AT2 receptors.

In contrast, ARBs block only the AT1 receptor and leave the AT2 counter-regulatory receptor alone, said Strauss.
 

More data, including on overall survival

Strauss and colleagues examined whether ACE inhibitors and/or ARBs could have an effect on the response to PD-1/PD-L1 immune checkpoint inhibitors delivered with or without other immunotherapies, such as anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) checkpoint inhibitors, or targeted agents such as tyrosine kinase inhibitors (TKIs).

They pooled data on 597 patients receiving PD-1/PD-L1 inhibitors in clinical trials for various cancers, including 71 receiving concomitant ARBs, 82 receiving an ACE inhibitor, and 444 who were not receiving either class of antihypertensives.

The above-mentioned improvement in ORR with ARBs compared with patients not receiving the drug was statistically significant (P = .001), as was the improvement in CR rates (P = .002). In contrast, neither ORR nor CR were significantly better with patients on ACE inhibitors compared with patients not taking these drugs.

In multiple regression analysis controlling for age, gender, body mass index (BMI), tumor type, and additional therapies given, the superior ORR and CR rates with ARBs remained (P = .039 and .002, respectively), while there continued to be no significant additional benefit with ACE inhibitors.

The median overall survival was 35.2 months for patients on ARBs, 26.2 months for those on ACE inhibitors, and 18.8 months for patients on neither drug. The respective 3-year OS rates were 48.1%, 37.2%, and 31.5%, with the difference between the ARB and no-drug groups being significant (P = .0078).

In regression analysis controlling for the factors mentioned before, the OS advantage with ARBs but not ACE inhibitors remained significant (P = .006 for ARBs, and .078 for ACE inhibitors).

Strauss emphasized that further study is needed to determine if AT1 blockade can improve outcomes when combined anti-PD-1/PD-L1-based therapy.

It might be reasonable for patients who are taking ACE inhibitors to control blood pressure and are also receiving immunotherapy with a PD-1/PD-L1 inhibitor to be switched to an ARB if it is deemed safe and if further research bears it out, said Strauss in response to a question from Medscape Medical News.
 

Hypothesis-generating study

Meeting cochair Emiliano Calvo, MD, PhD, from Hospital de Madrid Norte Sanchinarro in Madrid, who attended the media briefing but was not involved in the study, commented that hypothesis-generating research using drugs already on the market for other indications adds important value to cancer therapy.

James Gulley, MD, PhD, from the Center for Cancer Research at the NCI, also a meeting cochair, agreed with Calvo.

“Thinking about utilizing the data that already exists to really get hypothesis-generating questions, it also opens up the possibility for real-world data, real-world evidence from these big datasets from [electronic medical records] that we could really interrogate and understand what we might see and get these hypothesis-generating findings that we could then prospectively evaluate,” Gulley said.

The research was funded by the National Cancer Institute. Strauss and Gulley are National Cancer Institute employees. Calvo disclosed no relevant financial relationships.

This article first appeared on Medscape.com.

It’s not ready for the clinic, but new research suggests that angiotensin receptor II blockers (ARBs) widely used to treat hypertension may improve responses to cancer immunotherapy agents targeted against the programmed death-1/ligand-1 (PD-1/PD-L1) pathway.

That conclusion comes from an observational study of 597 patients with more than 3 dozen different cancer types treated in clinical trials at the US National Institutes of Health. Investigators found that both objective response rates and 3-year overall survival (OS) rates were significantly higher for patients treated with a PD-1/PD-L1 inhibitor who were on ARBs, compared with patients who weren’t taking the antihypertensive agents.

An association was also seen between higher ORR and OS rates for patients taking ACE inhibitors, but it was not statistically significant, reported Julius Strauss, MD, from the Center for Cancer Research at the National Cancer Institute in Bethesda, Md.

All study patients received PD-1/PD-L1 inhibitors, and the ORR for patients treated with ARBs was 33.8%, compared with 19.5% for those treated with ACE inhibitors, and 17% for those who took neither drug. The respective complete response (CR) rates were 11.3%, 3.7%, and 3.1%.

Strauss discussed the data during an online briefing prior to his presentation of the findings during the 32nd EORTC-NCI-AACR Symposium on Molecular Targets and Cancer Therapeutics, which is taking place virtually.

Several early studies have suggested that angiotensin II, in addition to its effect on blood pressure, can also affect cancer growth by leading to downstream production of two proteins: vascular endothelial growth factor (VEGF) and transforming growth factor–beta (TGF-beta), he explained.

“Both of these [proteins] have been linked to cancer growth and cancer resistance to immune system attack,” Strauss observed.

He also discussed the mechanics of possible effects. Angiotensin II increases VEGF and TGF-beta through binding to the AT1 receptor, but has the opposite effect when it binds to the AT2 receptor, resulting in a decrease in both of the growth factors, he added.

ACE inhibitors prevent the conversion of angiotensin I to angiotensin II, with the result being that the drugs indirectly block both the AT1 and AT2 receptors.

In contrast, ARBs block only the AT1 receptor and leave the AT2 counter-regulatory receptor alone, said Strauss.
 

More data, including on overall survival

Strauss and colleagues examined whether ACE inhibitors and/or ARBs could have an effect on the response to PD-1/PD-L1 immune checkpoint inhibitors delivered with or without other immunotherapies, such as anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) checkpoint inhibitors, or targeted agents such as tyrosine kinase inhibitors (TKIs).

They pooled data on 597 patients receiving PD-1/PD-L1 inhibitors in clinical trials for various cancers, including 71 receiving concomitant ARBs, 82 receiving an ACE inhibitor, and 444 who were not receiving either class of antihypertensives.

The above-mentioned improvement in ORR with ARBs compared with patients not receiving the drug was statistically significant (P = .001), as was the improvement in CR rates (P = .002). In contrast, neither ORR nor CR were significantly better with patients on ACE inhibitors compared with patients not taking these drugs.

In multiple regression analysis controlling for age, gender, body mass index (BMI), tumor type, and additional therapies given, the superior ORR and CR rates with ARBs remained (P = .039 and .002, respectively), while there continued to be no significant additional benefit with ACE inhibitors.

The median overall survival was 35.2 months for patients on ARBs, 26.2 months for those on ACE inhibitors, and 18.8 months for patients on neither drug. The respective 3-year OS rates were 48.1%, 37.2%, and 31.5%, with the difference between the ARB and no-drug groups being significant (P = .0078).

In regression analysis controlling for the factors mentioned before, the OS advantage with ARBs but not ACE inhibitors remained significant (P = .006 for ARBs, and .078 for ACE inhibitors).

Strauss emphasized that further study is needed to determine if AT1 blockade can improve outcomes when combined anti-PD-1/PD-L1-based therapy.

It might be reasonable for patients who are taking ACE inhibitors to control blood pressure and are also receiving immunotherapy with a PD-1/PD-L1 inhibitor to be switched to an ARB if it is deemed safe and if further research bears it out, said Strauss in response to a question from Medscape Medical News.
 

Hypothesis-generating study

Meeting cochair Emiliano Calvo, MD, PhD, from Hospital de Madrid Norte Sanchinarro in Madrid, who attended the media briefing but was not involved in the study, commented that hypothesis-generating research using drugs already on the market for other indications adds important value to cancer therapy.

James Gulley, MD, PhD, from the Center for Cancer Research at the NCI, also a meeting cochair, agreed with Calvo.

“Thinking about utilizing the data that already exists to really get hypothesis-generating questions, it also opens up the possibility for real-world data, real-world evidence from these big datasets from [electronic medical records] that we could really interrogate and understand what we might see and get these hypothesis-generating findings that we could then prospectively evaluate,” Gulley said.

The research was funded by the National Cancer Institute. Strauss and Gulley are National Cancer Institute employees. Calvo disclosed no relevant financial relationships.

This article first appeared on Medscape.com.