Will Pass

For elderly patients with chronic lymphocytic leukemia (CLL) and comorbidities, the anti-CD20 monoclonal antibody ofatumumab may be a safe and effective treatment option, according to a recent phase 2 trial.

Among 32 patients with a median age of 73 years, the overall response rate was 72%, and no grade 4 adverse events occurred, reported lead author Candida Vitale, MD, PhD, of the University of Torino (Italy) and colleagues.

These findings help fill in a knowledge gap created by clinical trial exclusions, which currently make treatment planning “a significant challenge,” the investigators wrote in Journal of Geriatric Oncology.

The study, which was conducted at MD Anderson Cancer Center in Houston, enrolled 34 treatment-naive patients with CLL who were 65 years or older. All patients had an Eastern Cooperative Oncology Group performance status of 2 or 3, or a Charlson comorbidity index of at least 2. Patients with other serious medical conditions and/or primary malignancies were eligible, given that they were not already receiving anticancer therapy.

More than half of the patients (53%) had advanced-stage disease and almost one-third (29%) had at least one other primary cancer diagnosis. Many patients also had high-risk disease characteristics, including a complex karyotype involving three or more chromosomal abnormalities (15%), and/or unmutated immunoglobulin heavy chain variable region (IGHV, 59%).

Among 32 patients eligible for efficacy analysis, the overall response rate was 72%, of which 53% were partial and 19% were complete. Six percent (6%) of patients achieved minimal residual disease negativity. The benefits of ofatumumab extended to patients with high-risk disease characteristics, including unmutated IGHV (65% response rate) and/or a complex karyotype (60% response rate).

Ofatumumab also demonstrated a favorable safety profile, according to the investigators.

With all 34 patients evaluable for safety data, 19 (56%) experienced a grade 1 or 2 infusion-related reaction, and 1 (3%) experienced a grade 3 infusion-related reaction. Twenty-one grade 2 infections were reported, and one grade 3 infection occurred. Other grade 3 treatment-related adverse events included gastrointestinal disturbances, pulmonary embolism, allergic reaction, and hyperglycemia, each of which occurred in one patient. No grade 4 adverse events, or grade 2 or higher hematologic toxicities occurred.

“Our findings show that older patients with poor performance status and comorbidities can safely undergo treatment with ofatumumab,” the investigators concluded. “[The results] also support the possibility of enrolling these patients in clinical trials, so that a larger number of patients will be included and their characteristics will more closely mirror those of typical patients seen in the community.”

The study was funded by Novartis, which markets the antibody. The investigators reported additional relationships with AbbVie, Roche, Celgene, and others.

SOURCE: Vitale et al. J Geriatr Oncol. 2019 Apr 18. doi: 10.1016/j.jgo.2019.04.002.

For elderly patients with chronic lymphocytic leukemia (CLL) and comorbidities, the anti-CD20 monoclonal antibody ofatumumab may be a safe and effective treatment option, according to a recent phase 2 trial.

Among 32 patients with a median age of 73 years, the overall response rate was 72%, and no grade 4 adverse events occurred, reported lead author Candida Vitale, MD, PhD, of the University of Torino (Italy) and colleagues.

These findings help fill in a knowledge gap created by clinical trial exclusions, which currently make treatment planning “a significant challenge,” the investigators wrote in Journal of Geriatric Oncology.

The study, which was conducted at MD Anderson Cancer Center in Houston, enrolled 34 treatment-naive patients with CLL who were 65 years or older. All patients had an Eastern Cooperative Oncology Group performance status of 2 or 3, or a Charlson comorbidity index of at least 2. Patients with other serious medical conditions and/or primary malignancies were eligible, given that they were not already receiving anticancer therapy.

More than half of the patients (53%) had advanced-stage disease and almost one-third (29%) had at least one other primary cancer diagnosis. Many patients also had high-risk disease characteristics, including a complex karyotype involving three or more chromosomal abnormalities (15%), and/or unmutated immunoglobulin heavy chain variable region (IGHV, 59%).

Among 32 patients eligible for efficacy analysis, the overall response rate was 72%, of which 53% were partial and 19% were complete. Six percent (6%) of patients achieved minimal residual disease negativity. The benefits of ofatumumab extended to patients with high-risk disease characteristics, including unmutated IGHV (65% response rate) and/or a complex karyotype (60% response rate).

Ofatumumab also demonstrated a favorable safety profile, according to the investigators.

With all 34 patients evaluable for safety data, 19 (56%) experienced a grade 1 or 2 infusion-related reaction, and 1 (3%) experienced a grade 3 infusion-related reaction. Twenty-one grade 2 infections were reported, and one grade 3 infection occurred. Other grade 3 treatment-related adverse events included gastrointestinal disturbances, pulmonary embolism, allergic reaction, and hyperglycemia, each of which occurred in one patient. No grade 4 adverse events, or grade 2 or higher hematologic toxicities occurred.

“Our findings show that older patients with poor performance status and comorbidities can safely undergo treatment with ofatumumab,” the investigators concluded. “[The results] also support the possibility of enrolling these patients in clinical trials, so that a larger number of patients will be included and their characteristics will more closely mirror those of typical patients seen in the community.”

The study was funded by Novartis, which markets the antibody. The investigators reported additional relationships with AbbVie, Roche, Celgene, and others.

SOURCE: Vitale et al. J Geriatr Oncol. 2019 Apr 18. doi: 10.1016/j.jgo.2019.04.002.

For elderly patients with chronic lymphocytic leukemia (CLL) and comorbidities, the anti-CD20 monoclonal antibody ofatumumab may be a safe and effective treatment option, according to a recent phase 2 trial.

Among 32 patients with a median age of 73 years, the overall response rate was 72%, and no grade 4 adverse events occurred, reported lead author Candida Vitale, MD, PhD, of the University of Torino (Italy) and colleagues.

These findings help fill in a knowledge gap created by clinical trial exclusions, which currently make treatment planning “a significant challenge,” the investigators wrote in Journal of Geriatric Oncology.

The study, which was conducted at MD Anderson Cancer Center in Houston, enrolled 34 treatment-naive patients with CLL who were 65 years or older. All patients had an Eastern Cooperative Oncology Group performance status of 2 or 3, or a Charlson comorbidity index of at least 2. Patients with other serious medical conditions and/or primary malignancies were eligible, given that they were not already receiving anticancer therapy.

More than half of the patients (53%) had advanced-stage disease and almost one-third (29%) had at least one other primary cancer diagnosis. Many patients also had high-risk disease characteristics, including a complex karyotype involving three or more chromosomal abnormalities (15%), and/or unmutated immunoglobulin heavy chain variable region (IGHV, 59%).

Among 32 patients eligible for efficacy analysis, the overall response rate was 72%, of which 53% were partial and 19% were complete. Six percent (6%) of patients achieved minimal residual disease negativity. The benefits of ofatumumab extended to patients with high-risk disease characteristics, including unmutated IGHV (65% response rate) and/or a complex karyotype (60% response rate).

Ofatumumab also demonstrated a favorable safety profile, according to the investigators.

With all 34 patients evaluable for safety data, 19 (56%) experienced a grade 1 or 2 infusion-related reaction, and 1 (3%) experienced a grade 3 infusion-related reaction. Twenty-one grade 2 infections were reported, and one grade 3 infection occurred. Other grade 3 treatment-related adverse events included gastrointestinal disturbances, pulmonary embolism, allergic reaction, and hyperglycemia, each of which occurred in one patient. No grade 4 adverse events, or grade 2 or higher hematologic toxicities occurred.

“Our findings show that older patients with poor performance status and comorbidities can safely undergo treatment with ofatumumab,” the investigators concluded. “[The results] also support the possibility of enrolling these patients in clinical trials, so that a larger number of patients will be included and their characteristics will more closely mirror those of typical patients seen in the community.”

The study was funded by Novartis, which markets the antibody. The investigators reported additional relationships with AbbVie, Roche, Celgene, and others.

SOURCE: Vitale et al. J Geriatr Oncol. 2019 Apr 18. doi: 10.1016/j.jgo.2019.04.002.

Chimeric antigen receptor (CAR) T-cell therapy is generally associated with good long-term neuropsychiatric status, based on a recent patient-reported outcomes study.

But almost one out of five patients may have notably worse cognitive and psychiatric outcomes within 1-5 years of therapy, reported Julia Ruark, MD, of the University of Washington, Seattle, and colleagues. According to Dr. Ruark and associates, this latter finding suggests that CAR T-cell therapy may negatively impact mental health in a subset of patients.

These findings provide clinical insight into a minimally researched patient population.

“At this time, only limited data are available regarding the long-term effects of CAR T-cell therapy,” the investigators wrote in Biology of Blood and Marrow Transplantation. “Thus, it is important to evaluate the late neuropsychiatric effects of CAR T and evaluate their effect on survivors’ quality of life.”

The study involved 40 patients with relapsed or refractory chronic lymphocytic leukemia, non-Hodgkin lymphoma, or acute lymphoblastic leukemia. Before undergoing CAR T-cell therapy, patients underwent standardized mental health screening with validated instruments such as the 7-item Generalized Anxiety Disorder scale. At least 1 year after CAR T-cell therapy, patients completed a questionnaire consisting of the Patient-Reported Outcomes Measurement Information System (PROMIS) Scale v1.2 Global Health and the PROMIS-29 Profile v2.1, and 30 additional questions, 4 of which evaluated cognitive function. These data were converted to T scores for comparative purposes.

Patients who underwent CAR T-cell therapy had statistically similar T scores to the general population mean, suggesting comparable overall neuropsychiatric status. However, a closer look at the data showed that almost one out of five patients who underwent CAR T-cell therapy had global mental health scores that were at least 1 standard deviation lower than the mean for the general population and patients with cancer.

Almost half of the patients (47.5%) who underwent CAR T-cell therapy reported at least one clinically meaningful negative neuropsychiatric outcome. Specifically, 20% reported cognitive difficulties and depression or anxiety, 17.5% reported cognitive difficulties without depression or anxiety, and 10% reported depression or anxiety without cognitive difficulties. One-quarter (25%) of patients reported taking a medication for depression, 20% reported use of anxiolytics, and 15% reported use of sleep medications. Multivariate analysis revealed an association between younger age and depression (P = .01), anxiety (P = .001), and worse long-term global mental health (P = .02). Cognitive difficulties were significantly more common among patients with worse physical and/or mental health.

“[A] subset of patients may experience psychiatric symptoms or cognitive impairment [which may be related to CAR T-cell therapy or other treatments patients have been exposed to], and it is important to identify those patients to assist with intervention strategies,” the investigators concluded.The study was funded by the National Institutes of Health, Life Science Discovery Fund, Juno Therapeutics/Celgene, and others. The investigators reported additional relationships with Nektar Therapeutics, Allogene Therapeutics, T-CURX, and others.

SOURCE: Ruark J et al. Biol Blood Marrow Transplant. 2019 Oct 9. doi: 10.1016/j.bbmt.2019.09.037.

Chimeric antigen receptor (CAR) T-cell therapy is generally associated with good long-term neuropsychiatric status, based on a recent patient-reported outcomes study.

But almost one out of five patients may have notably worse cognitive and psychiatric outcomes within 1-5 years of therapy, reported Julia Ruark, MD, of the University of Washington, Seattle, and colleagues. According to Dr. Ruark and associates, this latter finding suggests that CAR T-cell therapy may negatively impact mental health in a subset of patients.

These findings provide clinical insight into a minimally researched patient population.

“At this time, only limited data are available regarding the long-term effects of CAR T-cell therapy,” the investigators wrote in Biology of Blood and Marrow Transplantation. “Thus, it is important to evaluate the late neuropsychiatric effects of CAR T and evaluate their effect on survivors’ quality of life.”

The study involved 40 patients with relapsed or refractory chronic lymphocytic leukemia, non-Hodgkin lymphoma, or acute lymphoblastic leukemia. Before undergoing CAR T-cell therapy, patients underwent standardized mental health screening with validated instruments such as the 7-item Generalized Anxiety Disorder scale. At least 1 year after CAR T-cell therapy, patients completed a questionnaire consisting of the Patient-Reported Outcomes Measurement Information System (PROMIS) Scale v1.2 Global Health and the PROMIS-29 Profile v2.1, and 30 additional questions, 4 of which evaluated cognitive function. These data were converted to T scores for comparative purposes.

Patients who underwent CAR T-cell therapy had statistically similar T scores to the general population mean, suggesting comparable overall neuropsychiatric status. However, a closer look at the data showed that almost one out of five patients who underwent CAR T-cell therapy had global mental health scores that were at least 1 standard deviation lower than the mean for the general population and patients with cancer.

Almost half of the patients (47.5%) who underwent CAR T-cell therapy reported at least one clinically meaningful negative neuropsychiatric outcome. Specifically, 20% reported cognitive difficulties and depression or anxiety, 17.5% reported cognitive difficulties without depression or anxiety, and 10% reported depression or anxiety without cognitive difficulties. One-quarter (25%) of patients reported taking a medication for depression, 20% reported use of anxiolytics, and 15% reported use of sleep medications. Multivariate analysis revealed an association between younger age and depression (P = .01), anxiety (P = .001), and worse long-term global mental health (P = .02). Cognitive difficulties were significantly more common among patients with worse physical and/or mental health.

“[A] subset of patients may experience psychiatric symptoms or cognitive impairment [which may be related to CAR T-cell therapy or other treatments patients have been exposed to], and it is important to identify those patients to assist with intervention strategies,” the investigators concluded.The study was funded by the National Institutes of Health, Life Science Discovery Fund, Juno Therapeutics/Celgene, and others. The investigators reported additional relationships with Nektar Therapeutics, Allogene Therapeutics, T-CURX, and others.

SOURCE: Ruark J et al. Biol Blood Marrow Transplant. 2019 Oct 9. doi: 10.1016/j.bbmt.2019.09.037.

Chimeric antigen receptor (CAR) T-cell therapy is generally associated with good long-term neuropsychiatric status, based on a recent patient-reported outcomes study.

But almost one out of five patients may have notably worse cognitive and psychiatric outcomes within 1-5 years of therapy, reported Julia Ruark, MD, of the University of Washington, Seattle, and colleagues. According to Dr. Ruark and associates, this latter finding suggests that CAR T-cell therapy may negatively impact mental health in a subset of patients.

These findings provide clinical insight into a minimally researched patient population.

“At this time, only limited data are available regarding the long-term effects of CAR T-cell therapy,” the investigators wrote in Biology of Blood and Marrow Transplantation. “Thus, it is important to evaluate the late neuropsychiatric effects of CAR T and evaluate their effect on survivors’ quality of life.”

The study involved 40 patients with relapsed or refractory chronic lymphocytic leukemia, non-Hodgkin lymphoma, or acute lymphoblastic leukemia. Before undergoing CAR T-cell therapy, patients underwent standardized mental health screening with validated instruments such as the 7-item Generalized Anxiety Disorder scale. At least 1 year after CAR T-cell therapy, patients completed a questionnaire consisting of the Patient-Reported Outcomes Measurement Information System (PROMIS) Scale v1.2 Global Health and the PROMIS-29 Profile v2.1, and 30 additional questions, 4 of which evaluated cognitive function. These data were converted to T scores for comparative purposes.

Patients who underwent CAR T-cell therapy had statistically similar T scores to the general population mean, suggesting comparable overall neuropsychiatric status. However, a closer look at the data showed that almost one out of five patients who underwent CAR T-cell therapy had global mental health scores that were at least 1 standard deviation lower than the mean for the general population and patients with cancer.

Almost half of the patients (47.5%) who underwent CAR T-cell therapy reported at least one clinically meaningful negative neuropsychiatric outcome. Specifically, 20% reported cognitive difficulties and depression or anxiety, 17.5% reported cognitive difficulties without depression or anxiety, and 10% reported depression or anxiety without cognitive difficulties. One-quarter (25%) of patients reported taking a medication for depression, 20% reported use of anxiolytics, and 15% reported use of sleep medications. Multivariate analysis revealed an association between younger age and depression (P = .01), anxiety (P = .001), and worse long-term global mental health (P = .02). Cognitive difficulties were significantly more common among patients with worse physical and/or mental health.

“[A] subset of patients may experience psychiatric symptoms or cognitive impairment [which may be related to CAR T-cell therapy or other treatments patients have been exposed to], and it is important to identify those patients to assist with intervention strategies,” the investigators concluded.The study was funded by the National Institutes of Health, Life Science Discovery Fund, Juno Therapeutics/Celgene, and others. The investigators reported additional relationships with Nektar Therapeutics, Allogene Therapeutics, T-CURX, and others.

SOURCE: Ruark J et al. Biol Blood Marrow Transplant. 2019 Oct 9. doi: 10.1016/j.bbmt.2019.09.037.

For men with prostate cancer, prostatectomy is more likely to cause long-term, clinically meaningful incontinence than are other treatment modalities, based on patient-reported outcomes from more than 2,000 men.

Patients with high-risk disease who underwent prostatectomy also reported worse sexual function at every time point over 5 years, reported Karen E. Hoffman, MD, of the University of Texas MD Anderson Cancer Center in Houston, and colleagues. Other functional differences between treatments faded over time, they said.

“These estimates of the long-term bowel, bladder, and sexual function after localized prostate cancer treatment may clarify expectations and enable men to make informed choices about care,” the investigators wrote. Their report is in JAMA.

The prospective, population-based cohort study involved 1,386 men with favorable-risk prostate cancer and 619 men with unfavorable-risk disease. For men with favorable-risk disease, treatments included low-dose brachytherapy, external beam radiation therapy (EBRT), nerve-sparing prostatectomy, and active surveillance. Men with unfavorable-risk disease were treated with either prostatectomy or EBRT plus androgen deprivation therapy (ADT).

At multiple time points for 5 years, patients completed the 26-item Expanded Prostate Index Composite questionnaire (EPIC; range, 0-100). Clinically significant functional differences between treatment modalities were defined for bowel and hormonal function (4-6), urinary irritative symptoms (5-7), urinary incontinence (6-9), and sexual function (10-12). All 2,005 men completed at least one questionnaire, with about 3 out of 4 men (77%) still responding after 5 years.

Across all patients, prostatectomy was associated with a relatively higher risk of long-term, clinically meaningful urinary incontinence.

For men with favorable-risk disease, the adjusted mean difference for incontinence between nerve-sparing prostatectomy and active surveillance was –10.9 (P less than .001). Patients in this group who elected prostatectomy over active surveillance had a higher rate of urinary leakage (10% vs. 7%; P = .04); however, there was no significant difference in rates of moderate or big problems with urinary function, which suggests that incontinence issues were typically mild.

For men with unfavorable risk disease, prostatectomy carried a higher risk of more severe incontinence. The adjusted mean difference between prostatectomy and EBRT plus ADT was –23.2 (P less than .001), and patients treated with prostatectomy were more likely to report moderate or big problems with urinary function (17% vs. 13%; P = .005). In addition to these urinary issues, men with unfavorable-risk disease who underwent prostatectomy were more likely to report worse sexual function at 5 years, compared with those who were treated with EBRT plus ADT (adjusted mean difference, –12.5).

While other clinically meaningful differences were found between treatments for other functional categories, these differences lost statistical significance by the 5-year time point.

The Agency for Healthcare Research and Quality, the Patient-Centered Outcomes Research Institute, and the National Cancer Institute funded the study. The investigators reported additional relationships with Dendreon, Bayer, AstraZeneca, and others.

SOURCE: Hoffman et al. JAMA. 2020 Jan 14. doi: 10.1001/jama.2019.20675.

For men with prostate cancer, prostatectomy is more likely to cause long-term, clinically meaningful incontinence than are other treatment modalities, based on patient-reported outcomes from more than 2,000 men.

Patients with high-risk disease who underwent prostatectomy also reported worse sexual function at every time point over 5 years, reported Karen E. Hoffman, MD, of the University of Texas MD Anderson Cancer Center in Houston, and colleagues. Other functional differences between treatments faded over time, they said.

“These estimates of the long-term bowel, bladder, and sexual function after localized prostate cancer treatment may clarify expectations and enable men to make informed choices about care,” the investigators wrote. Their report is in JAMA.

The prospective, population-based cohort study involved 1,386 men with favorable-risk prostate cancer and 619 men with unfavorable-risk disease. For men with favorable-risk disease, treatments included low-dose brachytherapy, external beam radiation therapy (EBRT), nerve-sparing prostatectomy, and active surveillance. Men with unfavorable-risk disease were treated with either prostatectomy or EBRT plus androgen deprivation therapy (ADT).

At multiple time points for 5 years, patients completed the 26-item Expanded Prostate Index Composite questionnaire (EPIC; range, 0-100). Clinically significant functional differences between treatment modalities were defined for bowel and hormonal function (4-6), urinary irritative symptoms (5-7), urinary incontinence (6-9), and sexual function (10-12). All 2,005 men completed at least one questionnaire, with about 3 out of 4 men (77%) still responding after 5 years.

Across all patients, prostatectomy was associated with a relatively higher risk of long-term, clinically meaningful urinary incontinence.

For men with favorable-risk disease, the adjusted mean difference for incontinence between nerve-sparing prostatectomy and active surveillance was –10.9 (P less than .001). Patients in this group who elected prostatectomy over active surveillance had a higher rate of urinary leakage (10% vs. 7%; P = .04); however, there was no significant difference in rates of moderate or big problems with urinary function, which suggests that incontinence issues were typically mild.

For men with unfavorable risk disease, prostatectomy carried a higher risk of more severe incontinence. The adjusted mean difference between prostatectomy and EBRT plus ADT was –23.2 (P less than .001), and patients treated with prostatectomy were more likely to report moderate or big problems with urinary function (17% vs. 13%; P = .005). In addition to these urinary issues, men with unfavorable-risk disease who underwent prostatectomy were more likely to report worse sexual function at 5 years, compared with those who were treated with EBRT plus ADT (adjusted mean difference, –12.5).

While other clinically meaningful differences were found between treatments for other functional categories, these differences lost statistical significance by the 5-year time point.

The Agency for Healthcare Research and Quality, the Patient-Centered Outcomes Research Institute, and the National Cancer Institute funded the study. The investigators reported additional relationships with Dendreon, Bayer, AstraZeneca, and others.

SOURCE: Hoffman et al. JAMA. 2020 Jan 14. doi: 10.1001/jama.2019.20675.

For men with prostate cancer, prostatectomy is more likely to cause long-term, clinically meaningful incontinence than are other treatment modalities, based on patient-reported outcomes from more than 2,000 men.

Patients with high-risk disease who underwent prostatectomy also reported worse sexual function at every time point over 5 years, reported Karen E. Hoffman, MD, of the University of Texas MD Anderson Cancer Center in Houston, and colleagues. Other functional differences between treatments faded over time, they said.

“These estimates of the long-term bowel, bladder, and sexual function after localized prostate cancer treatment may clarify expectations and enable men to make informed choices about care,” the investigators wrote. Their report is in JAMA.

The prospective, population-based cohort study involved 1,386 men with favorable-risk prostate cancer and 619 men with unfavorable-risk disease. For men with favorable-risk disease, treatments included low-dose brachytherapy, external beam radiation therapy (EBRT), nerve-sparing prostatectomy, and active surveillance. Men with unfavorable-risk disease were treated with either prostatectomy or EBRT plus androgen deprivation therapy (ADT).

At multiple time points for 5 years, patients completed the 26-item Expanded Prostate Index Composite questionnaire (EPIC; range, 0-100). Clinically significant functional differences between treatment modalities were defined for bowel and hormonal function (4-6), urinary irritative symptoms (5-7), urinary incontinence (6-9), and sexual function (10-12). All 2,005 men completed at least one questionnaire, with about 3 out of 4 men (77%) still responding after 5 years.

Across all patients, prostatectomy was associated with a relatively higher risk of long-term, clinically meaningful urinary incontinence.

For men with favorable-risk disease, the adjusted mean difference for incontinence between nerve-sparing prostatectomy and active surveillance was –10.9 (P less than .001). Patients in this group who elected prostatectomy over active surveillance had a higher rate of urinary leakage (10% vs. 7%; P = .04); however, there was no significant difference in rates of moderate or big problems with urinary function, which suggests that incontinence issues were typically mild.

For men with unfavorable risk disease, prostatectomy carried a higher risk of more severe incontinence. The adjusted mean difference between prostatectomy and EBRT plus ADT was –23.2 (P less than .001), and patients treated with prostatectomy were more likely to report moderate or big problems with urinary function (17% vs. 13%; P = .005). In addition to these urinary issues, men with unfavorable-risk disease who underwent prostatectomy were more likely to report worse sexual function at 5 years, compared with those who were treated with EBRT plus ADT (adjusted mean difference, –12.5).

While other clinically meaningful differences were found between treatments for other functional categories, these differences lost statistical significance by the 5-year time point.

The Agency for Healthcare Research and Quality, the Patient-Centered Outcomes Research Institute, and the National Cancer Institute funded the study. The investigators reported additional relationships with Dendreon, Bayer, AstraZeneca, and others.

SOURCE: Hoffman et al. JAMA. 2020 Jan 14. doi: 10.1001/jama.2019.20675.

For detection of recurrent colorectal cancer, circulating tumor DNA (ctDNA) may be more reliable than carcinoembryonic antigen (CEA), based on a recent Australian study.

Among 144 patients with a history of colorectal cancer, ctDNA testing offered a sensitivity of 66.0%, compared with 31.9% for CEA, reported lead author Erin L. Symonds, PhD, of Flinders University, Bedford Park, Australia, and colleagues, who noted that the two tests had comparable specificity.

According to the investigators, many patients with colorectal cancer who relapse are incurable because they have multiple unresectable metastases.

“This may be due to the poor sensitivity of the currently applied surveillance tools, with guidelines focused on radiological imaging (mostly yearly computed tomography [CT] scans) and regular blood tests for carcinoembryonic antigen (CEA),” the investigators wrote in Cancer. “There is a need to improve the timely detection of metastatic disease while it is still confined to a resectable state.”

To this end, the investigators compared ctDNA testing with CEA testing in a real-world setting. Initially, 548 patients were enrolled. The final dataset included 144 of these patients, all of whom were disease negative on CT or MRI after surgical resection or neoadjuvant therapy. Most exclusions were due to unavailability of imaging results. Circulating tumor DNA testing evaluated methylation levels of BCAT1 and IKZF1 (COLVERA test, Clinical Genomics Pty, North Ryde, New South Wales, Australia) . The LIAISON CEA test was used to measure CEA plasma concentration.

After a median follow-up of almost 4 years, 50 out of 144 patients had disease recurrence, most of which involved distant metastasis (74%). As described above, the sensitivity of ctDNA was higher than CEA by a wide and significant margin (66.0% vs. 31.9%; P less than .001). The superior sensitivity of ctDNA was observed regardless of whether recurrence was locoregional (76.9% vs. 15.4%; P = .006) or distant (62.1% vs. 38.2%; P = .044). Specificity was not statistically different between ctDNA (97.9%) and CEA (96.4%). Multivariate analysis showed that ctDNA was an independent predictor of recurrence, while CEA was not.

“In conclusion, the methylated BCAT1/IKZF1 ctDNA test is twice as sensitive as CEA for detecting recurrent CRC during the monitoring of patients after their initial treatment,” the investigators wrote.

The study was funded by the National Health and Medical Research Council, Clinical Genomics, Cancer Council SA’s Beat Cancer Project, and others. The investigators reported additional relationships with Eiken Chemical and the Commonwealth Scientific and Industrial Research Organisation.

*This story was updated on Jan. 10, 2020.

SOURCE: Symonds et al. Cancer. 2020 Jan 7. doi: 10.1002/cncr.32695.

For detection of recurrent colorectal cancer, circulating tumor DNA (ctDNA) may be more reliable than carcinoembryonic antigen (CEA), based on a recent Australian study.

Among 144 patients with a history of colorectal cancer, ctDNA testing offered a sensitivity of 66.0%, compared with 31.9% for CEA, reported lead author Erin L. Symonds, PhD, of Flinders University, Bedford Park, Australia, and colleagues, who noted that the two tests had comparable specificity.

According to the investigators, many patients with colorectal cancer who relapse are incurable because they have multiple unresectable metastases.

“This may be due to the poor sensitivity of the currently applied surveillance tools, with guidelines focused on radiological imaging (mostly yearly computed tomography [CT] scans) and regular blood tests for carcinoembryonic antigen (CEA),” the investigators wrote in Cancer. “There is a need to improve the timely detection of metastatic disease while it is still confined to a resectable state.”

To this end, the investigators compared ctDNA testing with CEA testing in a real-world setting. Initially, 548 patients were enrolled. The final dataset included 144 of these patients, all of whom were disease negative on CT or MRI after surgical resection or neoadjuvant therapy. Most exclusions were due to unavailability of imaging results. Circulating tumor DNA testing evaluated methylation levels of BCAT1 and IKZF1 (COLVERA test, Clinical Genomics Pty, North Ryde, New South Wales, Australia) . The LIAISON CEA test was used to measure CEA plasma concentration.

After a median follow-up of almost 4 years, 50 out of 144 patients had disease recurrence, most of which involved distant metastasis (74%). As described above, the sensitivity of ctDNA was higher than CEA by a wide and significant margin (66.0% vs. 31.9%; P less than .001). The superior sensitivity of ctDNA was observed regardless of whether recurrence was locoregional (76.9% vs. 15.4%; P = .006) or distant (62.1% vs. 38.2%; P = .044). Specificity was not statistically different between ctDNA (97.9%) and CEA (96.4%). Multivariate analysis showed that ctDNA was an independent predictor of recurrence, while CEA was not.

“In conclusion, the methylated BCAT1/IKZF1 ctDNA test is twice as sensitive as CEA for detecting recurrent CRC during the monitoring of patients after their initial treatment,” the investigators wrote.

The study was funded by the National Health and Medical Research Council, Clinical Genomics, Cancer Council SA’s Beat Cancer Project, and others. The investigators reported additional relationships with Eiken Chemical and the Commonwealth Scientific and Industrial Research Organisation.

*This story was updated on Jan. 10, 2020.

SOURCE: Symonds et al. Cancer. 2020 Jan 7. doi: 10.1002/cncr.32695.

For detection of recurrent colorectal cancer, circulating tumor DNA (ctDNA) may be more reliable than carcinoembryonic antigen (CEA), based on a recent Australian study.

Among 144 patients with a history of colorectal cancer, ctDNA testing offered a sensitivity of 66.0%, compared with 31.9% for CEA, reported lead author Erin L. Symonds, PhD, of Flinders University, Bedford Park, Australia, and colleagues, who noted that the two tests had comparable specificity.

According to the investigators, many patients with colorectal cancer who relapse are incurable because they have multiple unresectable metastases.

“This may be due to the poor sensitivity of the currently applied surveillance tools, with guidelines focused on radiological imaging (mostly yearly computed tomography [CT] scans) and regular blood tests for carcinoembryonic antigen (CEA),” the investigators wrote in Cancer. “There is a need to improve the timely detection of metastatic disease while it is still confined to a resectable state.”

To this end, the investigators compared ctDNA testing with CEA testing in a real-world setting. Initially, 548 patients were enrolled. The final dataset included 144 of these patients, all of whom were disease negative on CT or MRI after surgical resection or neoadjuvant therapy. Most exclusions were due to unavailability of imaging results. Circulating tumor DNA testing evaluated methylation levels of BCAT1 and IKZF1 (COLVERA test, Clinical Genomics Pty, North Ryde, New South Wales, Australia) . The LIAISON CEA test was used to measure CEA plasma concentration.

After a median follow-up of almost 4 years, 50 out of 144 patients had disease recurrence, most of which involved distant metastasis (74%). As described above, the sensitivity of ctDNA was higher than CEA by a wide and significant margin (66.0% vs. 31.9%; P less than .001). The superior sensitivity of ctDNA was observed regardless of whether recurrence was locoregional (76.9% vs. 15.4%; P = .006) or distant (62.1% vs. 38.2%; P = .044). Specificity was not statistically different between ctDNA (97.9%) and CEA (96.4%). Multivariate analysis showed that ctDNA was an independent predictor of recurrence, while CEA was not.

“In conclusion, the methylated BCAT1/IKZF1 ctDNA test is twice as sensitive as CEA for detecting recurrent CRC during the monitoring of patients after their initial treatment,” the investigators wrote.

The study was funded by the National Health and Medical Research Council, Clinical Genomics, Cancer Council SA’s Beat Cancer Project, and others. The investigators reported additional relationships with Eiken Chemical and the Commonwealth Scientific and Industrial Research Organisation.

*This story was updated on Jan. 10, 2020.

SOURCE: Symonds et al. Cancer. 2020 Jan 7. doi: 10.1002/cncr.32695.

In males but not females, hyperinsulinemia, insulin resistance, and metabolic syndrome are independently associated with a higher risk of Barrett’s esophagus (BE), based on a recent case-control study.

These findings offer some insight into why men have higher rates of BE and esophageal adenocarcinoma than do women, reported lead author Bradley J. Kendall, MBBS, PhD, of the University of Queensland in Brisbane, Australia, and colleagues.

“Esophageal adenocarcinoma (EA) and its precursor lesion, Barrett’s esophagus (BE), are more common in males than females,” the investigators wrote in the Journal of Clinical Gastroenterology. “In contrast, gastroesophageal reflux (GER), the major risk factor for BE and EA occurs at similar frequencies in both sexes. In addition, 10% to 20% of BE and EA cases report no history of GER symptoms. This suggests that non-GER factors are important in the development of BE and EA.”

To examine risk factors more closely, the investigators enrolled 227 patients with BE and 241 age- and sex-matched controls. Data were drawn from self-reported questionnaires, interviews, blood pressure readings, and anthropometric measurements, the latter of which included weight, height, and waist circumference. These patient characteristics were supplemented with fasted blood assays. The investigators looked for associations between BE and insulin level, Homeostatic Model Assessment of Insulin Resistance, metabolic syndrome, type 2 diabetes mellitus, insulin-like growth factors, and interleukin-6 (IL-6).

Across the entire population, independent associations were detected between BE and hyperinsulinemia (highest vs. lowest tertile; odds ratio, 1.9; P = .003), insulin resistance (OR, 1.9; P = .006) and metabolic syndrome (OR, 1.8; P = .004). For those with metabolic syndrome, risk of BE increased by 20% for each additional syndrome criterion (P = .02).

When stratifying by sex, however, all of the above risk factors remained statistically significant in men, but not in women. For male patients, compared with the population as a whole, risks were relatively higher for all three factors: hyperinsulinemia (OR, 2.1; P = .007), insulin resistance (OR, 2.1; P = .01), and metabolic syndrome (OR, 2.3; P = .001). Similarly, for men with metabolic syndrome, each additional syndrome criterion increased risk of BE by 40% (P = .005).

Regardless of sex stratification, the other evaluated characteristics (type 2 diabetes mellitus, insulin-like growth factors, and IL-6) were not associated with BE risk.

The investigators offered some possible mechanistic explanations for their findings.

“Hyperinsulinemia ... can result in increased insulin signaling, increased cellular proliferation, reduced apoptosis, oncogenic pathway activation, and enhanced cellular invasion,” they wrote. “In addition, abdominal obesity, which is the driver of these disorders of insulin homeostasis, also alters adipocytokine profiles and induces a chronic systemic inflammatory state. The inflammatory state can result in oncoprotein activation, angiogenesis, cellular proliferation, apoptosis, and metastasis.”

Concerning the difference between sexes, the investigators pointed to patterns of abdominal obesity. “[A]bdominal obesity and the associated metabolic sequelae are more common in males than females,” they wrote. “These observations give rise to the notion that the metabolic syndrome potentiates the inflammatory effects of the gastric refluxate in the distal esophagus and this may play a role in the male predominance of BE and EA.”

While these findings offer insight into the underlying processes that precipitate BE, the investigators suggested that more research is needed.

“The interactions of obesity hormones, GER, and the cells of the esophageal mucosa warrant further investigation,” they concluded.

The study was funded by the Queensland Cancer Fund, Queensland Government Smart State Fund, and the Princess Alexandra Hospital Research Foundation, and others. The investigators reported no disclosures.

SOURCE: Kendall BJ et al. J Clin Gastroenterol. 2019 Dec 24. doi: 10.1097/MCG.0000000000001307.

In males but not females, hyperinsulinemia, insulin resistance, and metabolic syndrome are independently associated with a higher risk of Barrett’s esophagus (BE), based on a recent case-control study.

These findings offer some insight into why men have higher rates of BE and esophageal adenocarcinoma than do women, reported lead author Bradley J. Kendall, MBBS, PhD, of the University of Queensland in Brisbane, Australia, and colleagues.

“Esophageal adenocarcinoma (EA) and its precursor lesion, Barrett’s esophagus (BE), are more common in males than females,” the investigators wrote in the Journal of Clinical Gastroenterology. “In contrast, gastroesophageal reflux (GER), the major risk factor for BE and EA occurs at similar frequencies in both sexes. In addition, 10% to 20% of BE and EA cases report no history of GER symptoms. This suggests that non-GER factors are important in the development of BE and EA.”

To examine risk factors more closely, the investigators enrolled 227 patients with BE and 241 age- and sex-matched controls. Data were drawn from self-reported questionnaires, interviews, blood pressure readings, and anthropometric measurements, the latter of which included weight, height, and waist circumference. These patient characteristics were supplemented with fasted blood assays. The investigators looked for associations between BE and insulin level, Homeostatic Model Assessment of Insulin Resistance, metabolic syndrome, type 2 diabetes mellitus, insulin-like growth factors, and interleukin-6 (IL-6).

Across the entire population, independent associations were detected between BE and hyperinsulinemia (highest vs. lowest tertile; odds ratio, 1.9; P = .003), insulin resistance (OR, 1.9; P = .006) and metabolic syndrome (OR, 1.8; P = .004). For those with metabolic syndrome, risk of BE increased by 20% for each additional syndrome criterion (P = .02).

When stratifying by sex, however, all of the above risk factors remained statistically significant in men, but not in women. For male patients, compared with the population as a whole, risks were relatively higher for all three factors: hyperinsulinemia (OR, 2.1; P = .007), insulin resistance (OR, 2.1; P = .01), and metabolic syndrome (OR, 2.3; P = .001). Similarly, for men with metabolic syndrome, each additional syndrome criterion increased risk of BE by 40% (P = .005).

Regardless of sex stratification, the other evaluated characteristics (type 2 diabetes mellitus, insulin-like growth factors, and IL-6) were not associated with BE risk.

The investigators offered some possible mechanistic explanations for their findings.

“Hyperinsulinemia ... can result in increased insulin signaling, increased cellular proliferation, reduced apoptosis, oncogenic pathway activation, and enhanced cellular invasion,” they wrote. “In addition, abdominal obesity, which is the driver of these disorders of insulin homeostasis, also alters adipocytokine profiles and induces a chronic systemic inflammatory state. The inflammatory state can result in oncoprotein activation, angiogenesis, cellular proliferation, apoptosis, and metastasis.”

Concerning the difference between sexes, the investigators pointed to patterns of abdominal obesity. “[A]bdominal obesity and the associated metabolic sequelae are more common in males than females,” they wrote. “These observations give rise to the notion that the metabolic syndrome potentiates the inflammatory effects of the gastric refluxate in the distal esophagus and this may play a role in the male predominance of BE and EA.”

While these findings offer insight into the underlying processes that precipitate BE, the investigators suggested that more research is needed.

“The interactions of obesity hormones, GER, and the cells of the esophageal mucosa warrant further investigation,” they concluded.

The study was funded by the Queensland Cancer Fund, Queensland Government Smart State Fund, and the Princess Alexandra Hospital Research Foundation, and others. The investigators reported no disclosures.

SOURCE: Kendall BJ et al. J Clin Gastroenterol. 2019 Dec 24. doi: 10.1097/MCG.0000000000001307.

In males but not females, hyperinsulinemia, insulin resistance, and metabolic syndrome are independently associated with a higher risk of Barrett’s esophagus (BE), based on a recent case-control study.

These findings offer some insight into why men have higher rates of BE and esophageal adenocarcinoma than do women, reported lead author Bradley J. Kendall, MBBS, PhD, of the University of Queensland in Brisbane, Australia, and colleagues.

“Esophageal adenocarcinoma (EA) and its precursor lesion, Barrett’s esophagus (BE), are more common in males than females,” the investigators wrote in the Journal of Clinical Gastroenterology. “In contrast, gastroesophageal reflux (GER), the major risk factor for BE and EA occurs at similar frequencies in both sexes. In addition, 10% to 20% of BE and EA cases report no history of GER symptoms. This suggests that non-GER factors are important in the development of BE and EA.”

To examine risk factors more closely, the investigators enrolled 227 patients with BE and 241 age- and sex-matched controls. Data were drawn from self-reported questionnaires, interviews, blood pressure readings, and anthropometric measurements, the latter of which included weight, height, and waist circumference. These patient characteristics were supplemented with fasted blood assays. The investigators looked for associations between BE and insulin level, Homeostatic Model Assessment of Insulin Resistance, metabolic syndrome, type 2 diabetes mellitus, insulin-like growth factors, and interleukin-6 (IL-6).

Across the entire population, independent associations were detected between BE and hyperinsulinemia (highest vs. lowest tertile; odds ratio, 1.9; P = .003), insulin resistance (OR, 1.9; P = .006) and metabolic syndrome (OR, 1.8; P = .004). For those with metabolic syndrome, risk of BE increased by 20% for each additional syndrome criterion (P = .02).

When stratifying by sex, however, all of the above risk factors remained statistically significant in men, but not in women. For male patients, compared with the population as a whole, risks were relatively higher for all three factors: hyperinsulinemia (OR, 2.1; P = .007), insulin resistance (OR, 2.1; P = .01), and metabolic syndrome (OR, 2.3; P = .001). Similarly, for men with metabolic syndrome, each additional syndrome criterion increased risk of BE by 40% (P = .005).

Regardless of sex stratification, the other evaluated characteristics (type 2 diabetes mellitus, insulin-like growth factors, and IL-6) were not associated with BE risk.

The investigators offered some possible mechanistic explanations for their findings.

“Hyperinsulinemia ... can result in increased insulin signaling, increased cellular proliferation, reduced apoptosis, oncogenic pathway activation, and enhanced cellular invasion,” they wrote. “In addition, abdominal obesity, which is the driver of these disorders of insulin homeostasis, also alters adipocytokine profiles and induces a chronic systemic inflammatory state. The inflammatory state can result in oncoprotein activation, angiogenesis, cellular proliferation, apoptosis, and metastasis.”

Concerning the difference between sexes, the investigators pointed to patterns of abdominal obesity. “[A]bdominal obesity and the associated metabolic sequelae are more common in males than females,” they wrote. “These observations give rise to the notion that the metabolic syndrome potentiates the inflammatory effects of the gastric refluxate in the distal esophagus and this may play a role in the male predominance of BE and EA.”

While these findings offer insight into the underlying processes that precipitate BE, the investigators suggested that more research is needed.

“The interactions of obesity hormones, GER, and the cells of the esophageal mucosa warrant further investigation,” they concluded.

The study was funded by the Queensland Cancer Fund, Queensland Government Smart State Fund, and the Princess Alexandra Hospital Research Foundation, and others. The investigators reported no disclosures.

SOURCE: Kendall BJ et al. J Clin Gastroenterol. 2019 Dec 24. doi: 10.1097/MCG.0000000000001307.

The American Gastroenterological Association recently released a clinical practice update for endoscopic treatment of Barrett’s esophagus with dysplasia and/or early esophageal adenocarcinoma.

The update offers best practice advice for a range of clinical scenarios based on published evidence, including guidelines and recent systematic reviews, reported lead author Prateek Sharma, MD, of the University of Kansas, Kansas City. Dr. Sharma was accompanied on the authoring review team by three other expert gastroenterologists from the United States and the Netherlands.

Beyond practice advice, the investigators highlighted a research focus for the future.

“Given the expense and time required for careful and continual surveillance after Barrett’s endoscopic therapy, the future must define improved means of risk-stratifying patients for therapy who are at highest risk for cancer development and for risk of recurrence after complete eradication of intestinal metaplasia,” they wrote in Gastroenterology. “Potentially, we may use a panel of patient characteristics (such as the [Progression in Barrett’s] score), preablation tissue characteristics (e.g., baseline grade of dysplasia) and the posttherapy molecular makeup of the epithelium to help risk stratify our patients.”

For now, many of the treatment principles in the update depend upon histologic features.

For instance, either endoscopic therapy or continued surveillance are reasonable options for patients with Barrett’s esophagus who have confirmed and persistent low-grade dysplasia. In contrast, the update recommends that all patients with high-grade dysplasia or esophageal adenocarcinoma (T1a) undergo endoscopic therapy, highlighting that this method is preferred over esophagectomy for patients with T1a cancer. Along the same lines, the investigators noted that endoscopic therapy is a “reasonable alternative” to esophagectomy in cases of T1b esophageal adenocarcinoma in the presence of minimal invasion and good to moderate differentiation, particularly in patients who are poor candidates for surgery.

During the decision-making process, patients with dysplasia should be advised that not undergoing endoscopic therapy may increase cancer risk, the investigators wrote, adding that patients should also be informed about endoscopic therapy–related risks of bleeding and perforation, which occur in less than 1% of patients, and the risk of postprocedural stricture formation, which occurs in approximately 6% of patients.

If endoscopic therapy is elected, the update suggests that the procedure be done by experts who perform at least 10 new cases per year.

Concerning specifics of therapy, the investigators advised that mucosal ablation be applied to all visible esophageal columnar mucosa, 5-10 mm proximal to the squamocolumnar junction, and 5-10 mm distal to the gastroesophageal junction. Ablation should only be performed in cases of flat Barrett’s esophagus in which no visible abnormalities or signs of inflammation are present, the review team wrote.

The investigators went on to lay out some “practical ground rules” for endoscopic therapy, including a potential pitfall.

“Ablation therapy may consist of multiple 2-3 monthly ablation sessions that may extend over a period of more than a year,” the investigators wrote. “The worst adverse outcome during the treatment period is failing to recognize and treat an invasive cancer while continuing the ablation sessions. This occurrence may place the patient outside of the window of opportunity for curative endoscopic treatment. Therefore, every ablation session starts with careful endoscopic inspection using [high-definition white-light endoscopy] and preferably optical chromoendoscopy to exclude the presence of visible abnormalities that require an endoscopic resection instead of the scheduled ablation. Routine biopsies of flat Barrett’s esophagus are not necessary or recommended prior to ablation at these sessions, as the blood may inhibit optimal energy transfer to the tissue.”

Following successfully achieved complete endoscopic and histologic eradication of intestinal metaplasia, the update calls for surveillance endoscopy with biopsies at intervals of 1 and 3 years for cases of low-grade dysplasia and at intervals of 3, 6, and 12 months for high-grade dysplasia or esophageal adenocarcinoma, followed by annual checks thereafter.

The investigators disclosed relationships with Olympus, Ironwood, Erbe, and others.

SOURCE: Sharma P et al. Gastroenterology. 2019 Nov 12. doi: 10.1053/j.gastro.2019.09.051.

The American Gastroenterological Association recently released a clinical practice update for endoscopic treatment of Barrett’s esophagus with dysplasia and/or early esophageal adenocarcinoma.

The update offers best practice advice for a range of clinical scenarios based on published evidence, including guidelines and recent systematic reviews, reported lead author Prateek Sharma, MD, of the University of Kansas, Kansas City. Dr. Sharma was accompanied on the authoring review team by three other expert gastroenterologists from the United States and the Netherlands.

Beyond practice advice, the investigators highlighted a research focus for the future.

“Given the expense and time required for careful and continual surveillance after Barrett’s endoscopic therapy, the future must define improved means of risk-stratifying patients for therapy who are at highest risk for cancer development and for risk of recurrence after complete eradication of intestinal metaplasia,” they wrote in Gastroenterology. “Potentially, we may use a panel of patient characteristics (such as the [Progression in Barrett’s] score), preablation tissue characteristics (e.g., baseline grade of dysplasia) and the posttherapy molecular makeup of the epithelium to help risk stratify our patients.”

For now, many of the treatment principles in the update depend upon histologic features.

For instance, either endoscopic therapy or continued surveillance are reasonable options for patients with Barrett’s esophagus who have confirmed and persistent low-grade dysplasia. In contrast, the update recommends that all patients with high-grade dysplasia or esophageal adenocarcinoma (T1a) undergo endoscopic therapy, highlighting that this method is preferred over esophagectomy for patients with T1a cancer. Along the same lines, the investigators noted that endoscopic therapy is a “reasonable alternative” to esophagectomy in cases of T1b esophageal adenocarcinoma in the presence of minimal invasion and good to moderate differentiation, particularly in patients who are poor candidates for surgery.

During the decision-making process, patients with dysplasia should be advised that not undergoing endoscopic therapy may increase cancer risk, the investigators wrote, adding that patients should also be informed about endoscopic therapy–related risks of bleeding and perforation, which occur in less than 1% of patients, and the risk of postprocedural stricture formation, which occurs in approximately 6% of patients.

If endoscopic therapy is elected, the update suggests that the procedure be done by experts who perform at least 10 new cases per year.

Concerning specifics of therapy, the investigators advised that mucosal ablation be applied to all visible esophageal columnar mucosa, 5-10 mm proximal to the squamocolumnar junction, and 5-10 mm distal to the gastroesophageal junction. Ablation should only be performed in cases of flat Barrett’s esophagus in which no visible abnormalities or signs of inflammation are present, the review team wrote.

The investigators went on to lay out some “practical ground rules” for endoscopic therapy, including a potential pitfall.

“Ablation therapy may consist of multiple 2-3 monthly ablation sessions that may extend over a period of more than a year,” the investigators wrote. “The worst adverse outcome during the treatment period is failing to recognize and treat an invasive cancer while continuing the ablation sessions. This occurrence may place the patient outside of the window of opportunity for curative endoscopic treatment. Therefore, every ablation session starts with careful endoscopic inspection using [high-definition white-light endoscopy] and preferably optical chromoendoscopy to exclude the presence of visible abnormalities that require an endoscopic resection instead of the scheduled ablation. Routine biopsies of flat Barrett’s esophagus are not necessary or recommended prior to ablation at these sessions, as the blood may inhibit optimal energy transfer to the tissue.”

Following successfully achieved complete endoscopic and histologic eradication of intestinal metaplasia, the update calls for surveillance endoscopy with biopsies at intervals of 1 and 3 years for cases of low-grade dysplasia and at intervals of 3, 6, and 12 months for high-grade dysplasia or esophageal adenocarcinoma, followed by annual checks thereafter.

The investigators disclosed relationships with Olympus, Ironwood, Erbe, and others.

SOURCE: Sharma P et al. Gastroenterology. 2019 Nov 12. doi: 10.1053/j.gastro.2019.09.051.

The American Gastroenterological Association recently released a clinical practice update for endoscopic treatment of Barrett’s esophagus with dysplasia and/or early esophageal adenocarcinoma.

The update offers best practice advice for a range of clinical scenarios based on published evidence, including guidelines and recent systematic reviews, reported lead author Prateek Sharma, MD, of the University of Kansas, Kansas City. Dr. Sharma was accompanied on the authoring review team by three other expert gastroenterologists from the United States and the Netherlands.

Beyond practice advice, the investigators highlighted a research focus for the future.

“Given the expense and time required for careful and continual surveillance after Barrett’s endoscopic therapy, the future must define improved means of risk-stratifying patients for therapy who are at highest risk for cancer development and for risk of recurrence after complete eradication of intestinal metaplasia,” they wrote in Gastroenterology. “Potentially, we may use a panel of patient characteristics (such as the [Progression in Barrett’s] score), preablation tissue characteristics (e.g., baseline grade of dysplasia) and the posttherapy molecular makeup of the epithelium to help risk stratify our patients.”

For now, many of the treatment principles in the update depend upon histologic features.

For instance, either endoscopic therapy or continued surveillance are reasonable options for patients with Barrett’s esophagus who have confirmed and persistent low-grade dysplasia. In contrast, the update recommends that all patients with high-grade dysplasia or esophageal adenocarcinoma (T1a) undergo endoscopic therapy, highlighting that this method is preferred over esophagectomy for patients with T1a cancer. Along the same lines, the investigators noted that endoscopic therapy is a “reasonable alternative” to esophagectomy in cases of T1b esophageal adenocarcinoma in the presence of minimal invasion and good to moderate differentiation, particularly in patients who are poor candidates for surgery.

During the decision-making process, patients with dysplasia should be advised that not undergoing endoscopic therapy may increase cancer risk, the investigators wrote, adding that patients should also be informed about endoscopic therapy–related risks of bleeding and perforation, which occur in less than 1% of patients, and the risk of postprocedural stricture formation, which occurs in approximately 6% of patients.

If endoscopic therapy is elected, the update suggests that the procedure be done by experts who perform at least 10 new cases per year.

Concerning specifics of therapy, the investigators advised that mucosal ablation be applied to all visible esophageal columnar mucosa, 5-10 mm proximal to the squamocolumnar junction, and 5-10 mm distal to the gastroesophageal junction. Ablation should only be performed in cases of flat Barrett’s esophagus in which no visible abnormalities or signs of inflammation are present, the review team wrote.

The investigators went on to lay out some “practical ground rules” for endoscopic therapy, including a potential pitfall.

“Ablation therapy may consist of multiple 2-3 monthly ablation sessions that may extend over a period of more than a year,” the investigators wrote. “The worst adverse outcome during the treatment period is failing to recognize and treat an invasive cancer while continuing the ablation sessions. This occurrence may place the patient outside of the window of opportunity for curative endoscopic treatment. Therefore, every ablation session starts with careful endoscopic inspection using [high-definition white-light endoscopy] and preferably optical chromoendoscopy to exclude the presence of visible abnormalities that require an endoscopic resection instead of the scheduled ablation. Routine biopsies of flat Barrett’s esophagus are not necessary or recommended prior to ablation at these sessions, as the blood may inhibit optimal energy transfer to the tissue.”

Following successfully achieved complete endoscopic and histologic eradication of intestinal metaplasia, the update calls for surveillance endoscopy with biopsies at intervals of 1 and 3 years for cases of low-grade dysplasia and at intervals of 3, 6, and 12 months for high-grade dysplasia or esophageal adenocarcinoma, followed by annual checks thereafter.

The investigators disclosed relationships with Olympus, Ironwood, Erbe, and others.

SOURCE: Sharma P et al. Gastroenterology. 2019 Nov 12. doi: 10.1053/j.gastro.2019.09.051.

The American Gastroenterological Association (AGA) recently published clinical practice guidelines for managing gastric intestinal metaplasia (GIM).

The guidelines are the first of their kind to be published in the United States, according to lead author Samir Gupta, MD, of the University of California San Diego, and colleagues. The panelists suggested that the guidelines may help standardize decision making in a common clinical scenario.

“GIM has been considered as one specific marker to identify patients who might benefit from surveillance because it has been associated with increased risk for gastric cancer and is routinely encountered in clinical practice,” the panelists wrote in Gastroenterology.

The guideline panel was composed of three gastroenterologists, two guideline methodologist trainees, and three GRADE experts. Recommendations were based on the AGA guideline development process, the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology, best practices set forth by the Academy of Medicine, and a technical review.

“Given the paucity of robust direct data on GIM in the U.S., evidence from all regions of the world was considered relevant in the evidence-gathering phase,” the panelists wrote (Gastroenterology. 2019 Dec 6. doi: 10.1053/j.gastro.2019.12.003).

Based on available evidence, the expert panel developed three clinical recommendations.

First, the panelists recommended that clinicians test all patients with GIM for Helicobacter pylori, followed by eradication, over no testing and eradication. This recommendation was strong and based on moderate quality evidence from 22 studies, including 7 randomized controlled trials. These studies showed that, compared with placebo, eradication of H. pylori was associated with a 32% pooled relative risk reduction in gastric cancer and a 33% pooled relative risk reduction in gastric cancer mortality among patients with or without GIM. The pooled relative risk reduction rate was similar in analyses solely composed of individuals with GIM, the panelists noted, whereas mortality data restricted to individuals with GIM were lacking.

“Overall, the known strong association of H. pylori with risk for incident gastric cancer and the technical review’s findings, which reinforce the evidence of reduced risk for incident gastric cancer after H. pylori eradication, supports the AGA recommendation to test for and eradicate H. pylori,” the panelists wrote.

The second recommendation, which was conditional and based on very low quality evidence, advised against routine use of endoscopic surveillance for patients with GIM. Still, surveillance may be considered for patients with higher risk of gastric cancer, including those with incomplete and/or extensive GIM, a family history of gastric cancer, racial/ethnic minorities, and immigrants from high incidence regions, the panelists wrote.

“Although the technical review did not find evidence supporting increased risk for gastric cancer among racial/ethnic minorities or immigrants with documented GIM, an overall increased risk for gastric cancer (irrespective of presence/absence of GIM) has been established among these groups, and may be considered as part of decision making regarding surveillance,” the panelists wrote.

The third and final recommendation was also conditional and based on very weak evidence; the panelists recommended against routine short-interval repeat endoscopy for the purpose of risk stratification.

“The technical review found no direct evidence to support the impact of short-interval (less than 12 months) repeat upper endoscopy among patients with incidental GIM on patient-important outcomes,” the panelists wrote.

However, the guidelines note that patients with potentially elevated risk profiles, such as patients with a family history of gastric cancer, “may reasonably elect for repeat endoscopy within 1 year for risk stratification.”

Comparing these guidelines with those from other organizations, such as the European Society of Gastrointestinal Endoscopy (ESGE), the panelists concluded that recommendations across organizations are “generally similar.”

Finally, the panelists outlined relevant knowledge gaps and pointed to future research topics. For instance, data are scarce comparing outcomes in relation to surveillance versus no surveillance among patients with GIM; and biomarkers such as pepsinogen levels, which are used in Asian countries for risk stratification of gastric cancer, have been studied minimally in the United States.

Guideline development was funded by the AGA. The panelists disclosed no conflicts of interest.

The American Gastroenterological Association (AGA) recently published clinical practice guidelines for managing gastric intestinal metaplasia (GIM).

The guidelines are the first of their kind to be published in the United States, according to lead author Samir Gupta, MD, of the University of California San Diego, and colleagues. The panelists suggested that the guidelines may help standardize decision making in a common clinical scenario.

“GIM has been considered as one specific marker to identify patients who might benefit from surveillance because it has been associated with increased risk for gastric cancer and is routinely encountered in clinical practice,” the panelists wrote in Gastroenterology.

The guideline panel was composed of three gastroenterologists, two guideline methodologist trainees, and three GRADE experts. Recommendations were based on the AGA guideline development process, the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology, best practices set forth by the Academy of Medicine, and a technical review.

“Given the paucity of robust direct data on GIM in the U.S., evidence from all regions of the world was considered relevant in the evidence-gathering phase,” the panelists wrote (Gastroenterology. 2019 Dec 6. doi: 10.1053/j.gastro.2019.12.003).

Based on available evidence, the expert panel developed three clinical recommendations.

First, the panelists recommended that clinicians test all patients with GIM for Helicobacter pylori, followed by eradication, over no testing and eradication. This recommendation was strong and based on moderate quality evidence from 22 studies, including 7 randomized controlled trials. These studies showed that, compared with placebo, eradication of H. pylori was associated with a 32% pooled relative risk reduction in gastric cancer and a 33% pooled relative risk reduction in gastric cancer mortality among patients with or without GIM. The pooled relative risk reduction rate was similar in analyses solely composed of individuals with GIM, the panelists noted, whereas mortality data restricted to individuals with GIM were lacking.

“Overall, the known strong association of H. pylori with risk for incident gastric cancer and the technical review’s findings, which reinforce the evidence of reduced risk for incident gastric cancer after H. pylori eradication, supports the AGA recommendation to test for and eradicate H. pylori,” the panelists wrote.

The second recommendation, which was conditional and based on very low quality evidence, advised against routine use of endoscopic surveillance for patients with GIM. Still, surveillance may be considered for patients with higher risk of gastric cancer, including those with incomplete and/or extensive GIM, a family history of gastric cancer, racial/ethnic minorities, and immigrants from high incidence regions, the panelists wrote.

“Although the technical review did not find evidence supporting increased risk for gastric cancer among racial/ethnic minorities or immigrants with documented GIM, an overall increased risk for gastric cancer (irrespective of presence/absence of GIM) has been established among these groups, and may be considered as part of decision making regarding surveillance,” the panelists wrote.

The third and final recommendation was also conditional and based on very weak evidence; the panelists recommended against routine short-interval repeat endoscopy for the purpose of risk stratification.

“The technical review found no direct evidence to support the impact of short-interval (less than 12 months) repeat upper endoscopy among patients with incidental GIM on patient-important outcomes,” the panelists wrote.

However, the guidelines note that patients with potentially elevated risk profiles, such as patients with a family history of gastric cancer, “may reasonably elect for repeat endoscopy within 1 year for risk stratification.”

Comparing these guidelines with those from other organizations, such as the European Society of Gastrointestinal Endoscopy (ESGE), the panelists concluded that recommendations across organizations are “generally similar.”

Finally, the panelists outlined relevant knowledge gaps and pointed to future research topics. For instance, data are scarce comparing outcomes in relation to surveillance versus no surveillance among patients with GIM; and biomarkers such as pepsinogen levels, which are used in Asian countries for risk stratification of gastric cancer, have been studied minimally in the United States.

Guideline development was funded by the AGA. The panelists disclosed no conflicts of interest.

The American Gastroenterological Association (AGA) recently published clinical practice guidelines for managing gastric intestinal metaplasia (GIM).

The guidelines are the first of their kind to be published in the United States, according to lead author Samir Gupta, MD, of the University of California San Diego, and colleagues. The panelists suggested that the guidelines may help standardize decision making in a common clinical scenario.

“GIM has been considered as one specific marker to identify patients who might benefit from surveillance because it has been associated with increased risk for gastric cancer and is routinely encountered in clinical practice,” the panelists wrote in Gastroenterology.

The guideline panel was composed of three gastroenterologists, two guideline methodologist trainees, and three GRADE experts. Recommendations were based on the AGA guideline development process, the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology, best practices set forth by the Academy of Medicine, and a technical review.

“Given the paucity of robust direct data on GIM in the U.S., evidence from all regions of the world was considered relevant in the evidence-gathering phase,” the panelists wrote (Gastroenterology. 2019 Dec 6. doi: 10.1053/j.gastro.2019.12.003).

Based on available evidence, the expert panel developed three clinical recommendations.

First, the panelists recommended that clinicians test all patients with GIM for Helicobacter pylori, followed by eradication, over no testing and eradication. This recommendation was strong and based on moderate quality evidence from 22 studies, including 7 randomized controlled trials. These studies showed that, compared with placebo, eradication of H. pylori was associated with a 32% pooled relative risk reduction in gastric cancer and a 33% pooled relative risk reduction in gastric cancer mortality among patients with or without GIM. The pooled relative risk reduction rate was similar in analyses solely composed of individuals with GIM, the panelists noted, whereas mortality data restricted to individuals with GIM were lacking.

“Overall, the known strong association of H. pylori with risk for incident gastric cancer and the technical review’s findings, which reinforce the evidence of reduced risk for incident gastric cancer after H. pylori eradication, supports the AGA recommendation to test for and eradicate H. pylori,” the panelists wrote.

The second recommendation, which was conditional and based on very low quality evidence, advised against routine use of endoscopic surveillance for patients with GIM. Still, surveillance may be considered for patients with higher risk of gastric cancer, including those with incomplete and/or extensive GIM, a family history of gastric cancer, racial/ethnic minorities, and immigrants from high incidence regions, the panelists wrote.

“Although the technical review did not find evidence supporting increased risk for gastric cancer among racial/ethnic minorities or immigrants with documented GIM, an overall increased risk for gastric cancer (irrespective of presence/absence of GIM) has been established among these groups, and may be considered as part of decision making regarding surveillance,” the panelists wrote.

The third and final recommendation was also conditional and based on very weak evidence; the panelists recommended against routine short-interval repeat endoscopy for the purpose of risk stratification.

“The technical review found no direct evidence to support the impact of short-interval (less than 12 months) repeat upper endoscopy among patients with incidental GIM on patient-important outcomes,” the panelists wrote.

However, the guidelines note that patients with potentially elevated risk profiles, such as patients with a family history of gastric cancer, “may reasonably elect for repeat endoscopy within 1 year for risk stratification.”

Comparing these guidelines with those from other organizations, such as the European Society of Gastrointestinal Endoscopy (ESGE), the panelists concluded that recommendations across organizations are “generally similar.”

Finally, the panelists outlined relevant knowledge gaps and pointed to future research topics. For instance, data are scarce comparing outcomes in relation to surveillance versus no surveillance among patients with GIM; and biomarkers such as pepsinogen levels, which are used in Asian countries for risk stratification of gastric cancer, have been studied minimally in the United States.

Guideline development was funded by the AGA. The panelists disclosed no conflicts of interest.

Muscle-invasive bladder cancer (MIBC) can be divided into six molecular classes that may eventually guide clinical decision making, according to an international consensus group.

The six classes are based on a variety of disease factors, including immune and stromal cell infiltration, oncogenic mechanisms, histologic features, and clinical characteristics, reported lead author Aurélie Kamoun, PhD, of Ligue Nationale Contre le Cancer in Paris, and colleagues.

Although several molecular classification systems for MIBC have been previously published, subtypes have varied widely, the investigators explained in European Urology.

“This diversity has impeded transferring subtypes into clinical practice and highlights that establishing a single consensus set of molecular subtypes would facilitate achieving such a transfer,” the investigators wrote.

In order to reach a consensus, the investigators drew data from the six previously published classification systems, including 1,750 transcriptomic profiles from 16 published datasets and 2 additional patient populations.

Using a network-based approach, the investigators identified consensus classes that reconciled differences between the previously published systems. This process revealed a core set of 1,084 consensus samples, from which the investigators built a single-sample transcriptomic classifier. This free tool is now available online at https://github.com/cit-bioinfo/consensusMIBC.

The six consensus molecular classes (with prevalence among samples) are basal/squamous (35%), luminal papillary (24%), luminal unstable (15%), luminal nonspecified (8%), stroma rich (15%), and neuroendocrine like (3%).

The investigators described a number of disease characteristics that correlate with each molecular class, from the genomic to the clinical level. For example, basal/squamous tumors were associated with TP53 mutations and immune infiltration involving natural killer cells and cytotoxic lymphocytes.

Similar conclusions were described at the clinical level.

Consensus class predicted overall survival, with neuroendocrine-like tumors having the worst prognosis relative to luminal papillary tumors (hazard ratio, 2.34; P less than .03).

The investigators also highlighted some possible treatment implications related to subtype. For example, patients with basal/squamous or luminal nonspecified tumors derived benefit from neoadjuvant chemotherapy. Similarly, patients with luminal nonspecified, luminal unstable, or neuroendocrine-like tumors were more likely to respond when given atezolizumab.

“We expect that this consensus classification will help the development of MIBC precision medicine by providing a robust framework to connect clinical findings to molecular contexts and to identify clinically relevant biomarkers for patient management,” Dr. Kamoun and coauthors concluded.

The investigators reported relationships with Bayer, Astellas, Genentech, and others.

SOURCE: Kamoun A et al. Eur Urol. 2019 Sep 26. doi: 10.1016/j.eururo.2019.09.006.

Muscle-invasive bladder cancer (MIBC) can be divided into six molecular classes that may eventually guide clinical decision making, according to an international consensus group.

The six classes are based on a variety of disease factors, including immune and stromal cell infiltration, oncogenic mechanisms, histologic features, and clinical characteristics, reported lead author Aurélie Kamoun, PhD, of Ligue Nationale Contre le Cancer in Paris, and colleagues.

Although several molecular classification systems for MIBC have been previously published, subtypes have varied widely, the investigators explained in European Urology.

“This diversity has impeded transferring subtypes into clinical practice and highlights that establishing a single consensus set of molecular subtypes would facilitate achieving such a transfer,” the investigators wrote.

In order to reach a consensus, the investigators drew data from the six previously published classification systems, including 1,750 transcriptomic profiles from 16 published datasets and 2 additional patient populations.

Using a network-based approach, the investigators identified consensus classes that reconciled differences between the previously published systems. This process revealed a core set of 1,084 consensus samples, from which the investigators built a single-sample transcriptomic classifier. This free tool is now available online at https://github.com/cit-bioinfo/consensusMIBC.

The six consensus molecular classes (with prevalence among samples) are basal/squamous (35%), luminal papillary (24%), luminal unstable (15%), luminal nonspecified (8%), stroma rich (15%), and neuroendocrine like (3%).

The investigators described a number of disease characteristics that correlate with each molecular class, from the genomic to the clinical level. For example, basal/squamous tumors were associated with TP53 mutations and immune infiltration involving natural killer cells and cytotoxic lymphocytes.

Similar conclusions were described at the clinical level.

Consensus class predicted overall survival, with neuroendocrine-like tumors having the worst prognosis relative to luminal papillary tumors (hazard ratio, 2.34; P less than .03).

The investigators also highlighted some possible treatment implications related to subtype. For example, patients with basal/squamous or luminal nonspecified tumors derived benefit from neoadjuvant chemotherapy. Similarly, patients with luminal nonspecified, luminal unstable, or neuroendocrine-like tumors were more likely to respond when given atezolizumab.

“We expect that this consensus classification will help the development of MIBC precision medicine by providing a robust framework to connect clinical findings to molecular contexts and to identify clinically relevant biomarkers for patient management,” Dr. Kamoun and coauthors concluded.

The investigators reported relationships with Bayer, Astellas, Genentech, and others.

SOURCE: Kamoun A et al. Eur Urol. 2019 Sep 26. doi: 10.1016/j.eururo.2019.09.006.

Muscle-invasive bladder cancer (MIBC) can be divided into six molecular classes that may eventually guide clinical decision making, according to an international consensus group.

The six classes are based on a variety of disease factors, including immune and stromal cell infiltration, oncogenic mechanisms, histologic features, and clinical characteristics, reported lead author Aurélie Kamoun, PhD, of Ligue Nationale Contre le Cancer in Paris, and colleagues.

Although several molecular classification systems for MIBC have been previously published, subtypes have varied widely, the investigators explained in European Urology.

“This diversity has impeded transferring subtypes into clinical practice and highlights that establishing a single consensus set of molecular subtypes would facilitate achieving such a transfer,” the investigators wrote.

In order to reach a consensus, the investigators drew data from the six previously published classification systems, including 1,750 transcriptomic profiles from 16 published datasets and 2 additional patient populations.

Using a network-based approach, the investigators identified consensus classes that reconciled differences between the previously published systems. This process revealed a core set of 1,084 consensus samples, from which the investigators built a single-sample transcriptomic classifier. This free tool is now available online at https://github.com/cit-bioinfo/consensusMIBC.

The six consensus molecular classes (with prevalence among samples) are basal/squamous (35%), luminal papillary (24%), luminal unstable (15%), luminal nonspecified (8%), stroma rich (15%), and neuroendocrine like (3%).

The investigators described a number of disease characteristics that correlate with each molecular class, from the genomic to the clinical level. For example, basal/squamous tumors were associated with TP53 mutations and immune infiltration involving natural killer cells and cytotoxic lymphocytes.

Similar conclusions were described at the clinical level.

Consensus class predicted overall survival, with neuroendocrine-like tumors having the worst prognosis relative to luminal papillary tumors (hazard ratio, 2.34; P less than .03).

The investigators also highlighted some possible treatment implications related to subtype. For example, patients with basal/squamous or luminal nonspecified tumors derived benefit from neoadjuvant chemotherapy. Similarly, patients with luminal nonspecified, luminal unstable, or neuroendocrine-like tumors were more likely to respond when given atezolizumab.

“We expect that this consensus classification will help the development of MIBC precision medicine by providing a robust framework to connect clinical findings to molecular contexts and to identify clinically relevant biomarkers for patient management,” Dr. Kamoun and coauthors concluded.

The investigators reported relationships with Bayer, Astellas, Genentech, and others.

SOURCE: Kamoun A et al. Eur Urol. 2019 Sep 26. doi: 10.1016/j.eururo.2019.09.006.

SAN ANTONIO – The high accuracy and efficiency of circulating tumor DNA (ctDNA) testing allows for routine clinical use in advanced breast cancer, according to investigators.

Will Pass/MDedge News

The plasmaMATCH trial showed that gene level agreement between ctDNA results measured by digital PCR versus sequencing was as high as 99.4%, reported lead author Nicholas Turner, MA, MRCP, PhD, of The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, London.

Dr. Turner, who presented findings at the San Antonio Breast Cancer Symposium, said that ctDNA testing can detect rare mutations and link patients with targeted therapies that have clinically relevant response rates.

“Multiple somatic mutations are potentially targetable in the treatment of advanced breast cancer,” Dr. Turner said. “In addition, mutations may be acquired [during treatment].”

The diverse and dynamic landscape of mutations in breast cancer creates a need to genotype tumors without repeating biopsies, Dr. Turner said. He noted that ctDNA is one possible means of fulfilling this need, although more prospective research is required to determine clinical utility.

To this end, the investigators conducted the phase II plasmaMATCH trial, a multiple parallel cohort, multicenter study involving 1,044 patients with advanced breast cancer. All patients had ctDNA testing performed prospectively with digital droplet PCR (ddPCR); in addition, ctDNA testing was performed with error-corrected sequencing using Guardant360, either prospectively or retrospectively. If actionable mutations were identified, and consent was provided, then patients entered the treatment cohort, which was composed of 142 participants.

Patients were divided into four parallel treatment cohorts based on ctDNA mutation results and accompanying treatments, as follows:

• (A) ESR1 mutation; extended-dose fulvestrant.
• (B) HER2 mutation; neratinib with or without fulvestrant.
• (C) AKT1 in estrogen receptor–positive disease; capivasertib plus fulvestrant.
• (D) “AKT basket” – AKT1 in estrogen receptor–negative disease or PTEN inactivating mutation; capivasertib.

The primary objective was response rate. For cohort A, at least 13 out of 78 evaluable patients (17%) needed to have a response to infer sufficient efficacy of the matched therapy. For the remaining cohorts, sufficient efficacy was defined by responses in at least 3 out of 16 evaluable patients (19%).

SOURCE: Turner et al. SABCS. 2019 Dec 12. Abstract GS3-06.

SAN ANTONIO – The high accuracy and efficiency of circulating tumor DNA (ctDNA) testing allows for routine clinical use in advanced breast cancer, according to investigators.

Will Pass/MDedge News

The plasmaMATCH trial showed that gene level agreement between ctDNA results measured by digital PCR versus sequencing was as high as 99.4%, reported lead author Nicholas Turner, MA, MRCP, PhD, of The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, London.

Dr. Turner, who presented findings at the San Antonio Breast Cancer Symposium, said that ctDNA testing can detect rare mutations and link patients with targeted therapies that have clinically relevant response rates.

“Multiple somatic mutations are potentially targetable in the treatment of advanced breast cancer,” Dr. Turner said. “In addition, mutations may be acquired [during treatment].”

The diverse and dynamic landscape of mutations in breast cancer creates a need to genotype tumors without repeating biopsies, Dr. Turner said. He noted that ctDNA is one possible means of fulfilling this need, although more prospective research is required to determine clinical utility.

To this end, the investigators conducted the phase II plasmaMATCH trial, a multiple parallel cohort, multicenter study involving 1,044 patients with advanced breast cancer. All patients had ctDNA testing performed prospectively with digital droplet PCR (ddPCR); in addition, ctDNA testing was performed with error-corrected sequencing using Guardant360, either prospectively or retrospectively. If actionable mutations were identified, and consent was provided, then patients entered the treatment cohort, which was composed of 142 participants.

Patients were divided into four parallel treatment cohorts based on ctDNA mutation results and accompanying treatments, as follows:

• (A) ESR1 mutation; extended-dose fulvestrant.
• (B) HER2 mutation; neratinib with or without fulvestrant.
• (C) AKT1 in estrogen receptor–positive disease; capivasertib plus fulvestrant.
• (D) “AKT basket” – AKT1 in estrogen receptor–negative disease or PTEN inactivating mutation; capivasertib.

The primary objective was response rate. For cohort A, at least 13 out of 78 evaluable patients (17%) needed to have a response to infer sufficient efficacy of the matched therapy. For the remaining cohorts, sufficient efficacy was defined by responses in at least 3 out of 16 evaluable patients (19%).

SOURCE: Turner et al. SABCS. 2019 Dec 12. Abstract GS3-06.

SAN ANTONIO – The high accuracy and efficiency of circulating tumor DNA (ctDNA) testing allows for routine clinical use in advanced breast cancer, according to investigators.

Will Pass/MDedge News

The plasmaMATCH trial showed that gene level agreement between ctDNA results measured by digital PCR versus sequencing was as high as 99.4%, reported lead author Nicholas Turner, MA, MRCP, PhD, of The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, London.

Dr. Turner, who presented findings at the San Antonio Breast Cancer Symposium, said that ctDNA testing can detect rare mutations and link patients with targeted therapies that have clinically relevant response rates.

“Multiple somatic mutations are potentially targetable in the treatment of advanced breast cancer,” Dr. Turner said. “In addition, mutations may be acquired [during treatment].”

The diverse and dynamic landscape of mutations in breast cancer creates a need to genotype tumors without repeating biopsies, Dr. Turner said. He noted that ctDNA is one possible means of fulfilling this need, although more prospective research is required to determine clinical utility.

To this end, the investigators conducted the phase II plasmaMATCH trial, a multiple parallel cohort, multicenter study involving 1,044 patients with advanced breast cancer. All patients had ctDNA testing performed prospectively with digital droplet PCR (ddPCR); in addition, ctDNA testing was performed with error-corrected sequencing using Guardant360, either prospectively or retrospectively. If actionable mutations were identified, and consent was provided, then patients entered the treatment cohort, which was composed of 142 participants.

Patients were divided into four parallel treatment cohorts based on ctDNA mutation results and accompanying treatments, as follows:

• (A) ESR1 mutation; extended-dose fulvestrant.
• (B) HER2 mutation; neratinib with or without fulvestrant.
• (C) AKT1 in estrogen receptor–positive disease; capivasertib plus fulvestrant.
• (D) “AKT basket” – AKT1 in estrogen receptor–negative disease or PTEN inactivating mutation; capivasertib.

The primary objective was response rate. For cohort A, at least 13 out of 78 evaluable patients (17%) needed to have a response to infer sufficient efficacy of the matched therapy. For the remaining cohorts, sufficient efficacy was defined by responses in at least 3 out of 16 evaluable patients (19%).

SOURCE: Turner et al. SABCS. 2019 Dec 12. Abstract GS3-06.

SAN ANTONIO – For detection of genomic aberrations in patients with advanced breast cancer, sensitivity of circulating tumor DNA (ctDNA) testing is effectively equivalent to that of tumor tissue sequencing, based on results of the plasmaMATCH trial.

Will Pass/MDedge News

When plasma and tumor tissue samples were collected within 60 days of one another, sensitivity of ctDNA testing was 98% for digital droplet PCR (ddPCR) and 100% for targeted sequencing with Guardant360, reported lead author Belinda Kingston, MB, ChB, of The Institute of Cancer Research, London.

In addition to analyzing ctDNA accuracy, Dr. Kingston and colleagues explored characteristics of genomic alterations in relation to one another and to disease subtypes.

“We have defined the genomic landscape of advanced breast cancer using ctDNA analysis,” Dr. Kingston said during a presentation at the San Antonio Breast Cancer Symposium.

The open-label plasmaMATCH trial, conducted at multiple centers in the United Kingdom, involved more than 1,000 patients with advanced breast cancer. The present analysis included 1,025 patients who underwent ctDNA testing via ddPCR, which screened for alterations in PIK3CA, ESR1, AKT1, and ERBB2. Eight hundred patients also underwent ctDNA testing with Guardant360 targeted sequencing (a 73-gene panel), while 77 patients additionally had tumor tissue sequencing performed on a fresh or frozen sample of metastatic tissue (a 16-gene panel).

Results showed that individual gene level agreement between the two ctDNA techniques ranged from 96% to 99% with kappa scores of at least 0.89. As described above, sensitivity of these tests, compared with tumor tissue sequencing, approached 100%.

Following this overview of diagnostic accuracy, Dr. Kingston described a series of genomic trends, focusing first on targetable alterations.

Both ctDNA techniques revealed that ESR1 mutations were common in cases of hormone receptor (HR)-positive disease, including approximately 40% of patients with HER2-negative breast cancer and approximately 20% of patients with HER2-positive breast cancer. In contrast, ESR1 mutations were found in less than 1% of patients with HR-negative disease. Although ERBB2 amplification was predominantly found in patients with HER2-positive breast cancer, this alteration was found in 1%-2% of patients with HER2-negative disease.

For the remainder of the presentation, Dr. Kingston focused on ctDNA targeted sequencing data.

Within this cohort of 800 participants, 92.9% of patients had a ctDNA alteration. The mean number of pathogenic alterations was 2.7; Dr. Kingston noted that, on average, patients with HR-positive, HER2-negative disease had significantly more alterations than did those with triple-negative breast cancer (3.0 vs 1.8; P less than .0001).

“We found that specific genes are enriched in certain breast cancer subtypes,” Dr. Kingston said, pointing out the “notable” rate of ERBB2 mutations (14%) in HER2-amplified disease.

Among patients with HR-positive disease, those who were HER2-negative often had ESR1 and KRAS mutations, whereas those with HER2-positive disease often had ESR1 mutations but not KRAS mutations.

Heterogeneity analysis showed that alterations in certain genes were clonally dominant, including AKT1, PIK3CA, GATA3, and TP53, while others were more often subclonal, including ESR1, RB1, SMAD4, and KRAS.

A closer look at frequency of alterations showed that AKT1, CDH1, and GATA3 were typically found as the only gene alteration present; in contrast, ESR1 alterations were often accompanied by multiple other gene hits.

Returning to targetable genes, the investigators found that there was significant variation in clonal dominance of pathogenic mutations in ESR1 and PIK3CA. A deeper analysis revealed that PIK3CA mutations were often double mutations in HR-positive disease, and that subclonal second mutations were found at APOBEC mutagenesis sites.

Carlos Arteaga, MD, of the University of Texas Southwestern Medical Center, Dallas, commented on the findings after the presentation and asked Dr. Kingston about a potential blind spot in the data.

Will Pass/MDedge News

SOURCE: Kingston et al. SABCS. 2019 Abstract GS3-07.

SAN ANTONIO – For detection of genomic aberrations in patients with advanced breast cancer, sensitivity of circulating tumor DNA (ctDNA) testing is effectively equivalent to that of tumor tissue sequencing, based on results of the plasmaMATCH trial.

Will Pass/MDedge News

When plasma and tumor tissue samples were collected within 60 days of one another, sensitivity of ctDNA testing was 98% for digital droplet PCR (ddPCR) and 100% for targeted sequencing with Guardant360, reported lead author Belinda Kingston, MB, ChB, of The Institute of Cancer Research, London.

In addition to analyzing ctDNA accuracy, Dr. Kingston and colleagues explored characteristics of genomic alterations in relation to one another and to disease subtypes.

“We have defined the genomic landscape of advanced breast cancer using ctDNA analysis,” Dr. Kingston said during a presentation at the San Antonio Breast Cancer Symposium.

The open-label plasmaMATCH trial, conducted at multiple centers in the United Kingdom, involved more than 1,000 patients with advanced breast cancer. The present analysis included 1,025 patients who underwent ctDNA testing via ddPCR, which screened for alterations in PIK3CA, ESR1, AKT1, and ERBB2. Eight hundred patients also underwent ctDNA testing with Guardant360 targeted sequencing (a 73-gene panel), while 77 patients additionally had tumor tissue sequencing performed on a fresh or frozen sample of metastatic tissue (a 16-gene panel).

Results showed that individual gene level agreement between the two ctDNA techniques ranged from 96% to 99% with kappa scores of at least 0.89. As described above, sensitivity of these tests, compared with tumor tissue sequencing, approached 100%.

Following this overview of diagnostic accuracy, Dr. Kingston described a series of genomic trends, focusing first on targetable alterations.

Both ctDNA techniques revealed that ESR1 mutations were common in cases of hormone receptor (HR)-positive disease, including approximately 40% of patients with HER2-negative breast cancer and approximately 20% of patients with HER2-positive breast cancer. In contrast, ESR1 mutations were found in less than 1% of patients with HR-negative disease. Although ERBB2 amplification was predominantly found in patients with HER2-positive breast cancer, this alteration was found in 1%-2% of patients with HER2-negative disease.

For the remainder of the presentation, Dr. Kingston focused on ctDNA targeted sequencing data.

Within this cohort of 800 participants, 92.9% of patients had a ctDNA alteration. The mean number of pathogenic alterations was 2.7; Dr. Kingston noted that, on average, patients with HR-positive, HER2-negative disease had significantly more alterations than did those with triple-negative breast cancer (3.0 vs 1.8; P less than .0001).

“We found that specific genes are enriched in certain breast cancer subtypes,” Dr. Kingston said, pointing out the “notable” rate of ERBB2 mutations (14%) in HER2-amplified disease.

Among patients with HR-positive disease, those who were HER2-negative often had ESR1 and KRAS mutations, whereas those with HER2-positive disease often had ESR1 mutations but not KRAS mutations.

Heterogeneity analysis showed that alterations in certain genes were clonally dominant, including AKT1, PIK3CA, GATA3, and TP53, while others were more often subclonal, including ESR1, RB1, SMAD4, and KRAS.

A closer look at frequency of alterations showed that AKT1, CDH1, and GATA3 were typically found as the only gene alteration present; in contrast, ESR1 alterations were often accompanied by multiple other gene hits.

Returning to targetable genes, the investigators found that there was significant variation in clonal dominance of pathogenic mutations in ESR1 and PIK3CA. A deeper analysis revealed that PIK3CA mutations were often double mutations in HR-positive disease, and that subclonal second mutations were found at APOBEC mutagenesis sites.

Carlos Arteaga, MD, of the University of Texas Southwestern Medical Center, Dallas, commented on the findings after the presentation and asked Dr. Kingston about a potential blind spot in the data.

Will Pass/MDedge News

SOURCE: Kingston et al. SABCS. 2019 Abstract GS3-07.

SAN ANTONIO – For detection of genomic aberrations in patients with advanced breast cancer, sensitivity of circulating tumor DNA (ctDNA) testing is effectively equivalent to that of tumor tissue sequencing, based on results of the plasmaMATCH trial.

Will Pass/MDedge News

When plasma and tumor tissue samples were collected within 60 days of one another, sensitivity of ctDNA testing was 98% for digital droplet PCR (ddPCR) and 100% for targeted sequencing with Guardant360, reported lead author Belinda Kingston, MB, ChB, of The Institute of Cancer Research, London.

In addition to analyzing ctDNA accuracy, Dr. Kingston and colleagues explored characteristics of genomic alterations in relation to one another and to disease subtypes.

“We have defined the genomic landscape of advanced breast cancer using ctDNA analysis,” Dr. Kingston said during a presentation at the San Antonio Breast Cancer Symposium.

The open-label plasmaMATCH trial, conducted at multiple centers in the United Kingdom, involved more than 1,000 patients with advanced breast cancer. The present analysis included 1,025 patients who underwent ctDNA testing via ddPCR, which screened for alterations in PIK3CA, ESR1, AKT1, and ERBB2. Eight hundred patients also underwent ctDNA testing with Guardant360 targeted sequencing (a 73-gene panel), while 77 patients additionally had tumor tissue sequencing performed on a fresh or frozen sample of metastatic tissue (a 16-gene panel).

Results showed that individual gene level agreement between the two ctDNA techniques ranged from 96% to 99% with kappa scores of at least 0.89. As described above, sensitivity of these tests, compared with tumor tissue sequencing, approached 100%.

Following this overview of diagnostic accuracy, Dr. Kingston described a series of genomic trends, focusing first on targetable alterations.

Both ctDNA techniques revealed that ESR1 mutations were common in cases of hormone receptor (HR)-positive disease, including approximately 40% of patients with HER2-negative breast cancer and approximately 20% of patients with HER2-positive breast cancer. In contrast, ESR1 mutations were found in less than 1% of patients with HR-negative disease. Although ERBB2 amplification was predominantly found in patients with HER2-positive breast cancer, this alteration was found in 1%-2% of patients with HER2-negative disease.

For the remainder of the presentation, Dr. Kingston focused on ctDNA targeted sequencing data.

Within this cohort of 800 participants, 92.9% of patients had a ctDNA alteration. The mean number of pathogenic alterations was 2.7; Dr. Kingston noted that, on average, patients with HR-positive, HER2-negative disease had significantly more alterations than did those with triple-negative breast cancer (3.0 vs 1.8; P less than .0001).

“We found that specific genes are enriched in certain breast cancer subtypes,” Dr. Kingston said, pointing out the “notable” rate of ERBB2 mutations (14%) in HER2-amplified disease.

Among patients with HR-positive disease, those who were HER2-negative often had ESR1 and KRAS mutations, whereas those with HER2-positive disease often had ESR1 mutations but not KRAS mutations.

Heterogeneity analysis showed that alterations in certain genes were clonally dominant, including AKT1, PIK3CA, GATA3, and TP53, while others were more often subclonal, including ESR1, RB1, SMAD4, and KRAS.

A closer look at frequency of alterations showed that AKT1, CDH1, and GATA3 were typically found as the only gene alteration present; in contrast, ESR1 alterations were often accompanied by multiple other gene hits.

Returning to targetable genes, the investigators found that there was significant variation in clonal dominance of pathogenic mutations in ESR1 and PIK3CA. A deeper analysis revealed that PIK3CA mutations were often double mutations in HR-positive disease, and that subclonal second mutations were found at APOBEC mutagenesis sites.

Carlos Arteaga, MD, of the University of Texas Southwestern Medical Center, Dallas, commented on the findings after the presentation and asked Dr. Kingston about a potential blind spot in the data.

Will Pass/MDedge News

SOURCE: Kingston et al. SABCS. 2019 Abstract GS3-07.