Senter, Leigha

AbstractBackgroundThe purpose of this study was to estimate the cumulative risks of all cancers in women from 50 to 75 years of age with a BRCA1 or BRCA2 pathogenic variant.MethodsParticipants were women with BRCA1 or BRCA2 pathogenic variants from 85 centers in 16 countries. Women were eligible if they had no cancer before the age of 50 years. Participants completed a baseline questionnaire and follow‐up questionnaires every 2 years. Women were followed from age 50 until a diagnosis of cancer, death, age 75, or last follow‐up. The risk of all cancers combined from age 50 to 75 was estimated using the Kaplan–Meier method.ResultsThere were 2211 women included (1470 BRCA1 and 742 BRCA2). There were 379 cancers diagnosed in the cohort between 50 and 75 years. The actuarial risk of any cancer from age 50 to 75 was 49% for BRCA1 and 43% for BRCA2. Breast (n = 186) and ovarian (n = 45) were the most frequent cancers observed. For women who had both risk‐reducing mastectomy and bilateral salpingo‐oophorectomy before age 50, the risk of developing any cancer between age 50 and 75 was 9%.ConclusionWomen with a BRCA1 or BRCA2 pathogenic variant have a high risk of cancer between the ages of 50 and 75 years and should be counselled appropriately.

Abstract Background: The lack of consensus on whether bilateral oophorectomy impacts risk of developing breast cancer among BRCA1 mutation carriers might be attributed to various biases, specifically, cancer-induced testing bias due to inclusion of prevalent cases. We conducted two complementary matched case–control analyses to evaluate the association of oophorectomy and BRCA1 breast cancer. Methods: A research questionnaire was administered every two years to collect information on exposures and disease. In the first analysis, we limited the study to prevalent breast cancer cases (diagnosed prior to study entry; n = 2,962) who were matched to controls on year of birth and country of residence (n = 4,358). In the second approach, we limited to 330 incident cases (diagnosed in the follow-up period) and 1,548 matched controls. Conditional logistic regression was used to estimate the adjusted odds ratios (OR) and 95% confidence intervals (CI) of invasive breast cancer. Results: In the first approach, there was a significant inverse association between oophorectomy and the risk of developing breast cancer [OR = 0.43; 95% confidence interval (CI), 0.34–0.55; P < 00001]. In the second approach, there was no association between oophorectomy and risk (OR = 1.21; 95% CI, 0.87–1.70; P = 0.26). Conclusions: The inclusion of women with a personal history of breast cancer prior to ascertainment likely impacts upon the association of oophorectomy and BRCA1 breast cancer risk. Impact: Oophorectomy is unlikely a determinant of breast cancer risk in BRCA1 mutation carriers but should be offered at age 35 to reduce the risk of ovarian and fallopian tube cancer.

256 Background: Ovarian cancer is the leading cause of gynecologic cancer mortality in the US. Given the high burden of disease and complexities in the provision of quality care, a multidisciplinary team approach is critical to optimal care delivery. In 2019, the Association of Community Cancer Centers (ACCC) launched a multiphase, stakeholder-driven initiative to improve care for this patient population. Results of a national survey of cancer programs to identify the needs of patients are reported here. Methods: A 20 question survey was developed by an expert steering committee including gynecologic oncologists, pathologists, genetic counselors, a nurse navigator, and cancer center administrators. The instrument was designed to collect data about cancer programs, key ovarian cancer patient needs, and barriers to and opportunities for improving ovarian cancer care. The online survey was open for participation for 4 weeks using the Qualtrics platform and distributed via email to ACCC and Society of Gynecologic Oncology members. Results: We received 26 total responses from Comprehensive Community (26%), NCI-Designed Comprehensive (22%), Academic Comprehensive (22%), and Integrated Network (13%) Cancer Programs. Annual ovarian cancer cases ranged from 22 to 190 (median: 50.5). 85% of programs has a multidisciplinary team for ovarian cancer and 61% were part of a referral network. On average, programs has 1.5 phase II and 2 phase III clinical trials currently available for ovarian cancer (all programs had at least 1 trial available). Palliative care and comprehensive symptom management was integrated into the first appointment (15%), integrated at the time of recurrence (4%), and most frequently, available by consult (81%). We assessed genetic testing practices at each program. Aggregated across programs, 79% of patients received germline multipanel testing, 71% germline BRCA only, 50% somatic multigene, and 51% somatic BRCA only. The frequency of consultations included: genetic counseling (75%), nurse navigation (75%), social work (50%), dietetics (40%), financial counseling (25%). Genetic evaluations were typically ordered by Gynecologic Oncology (88%), genetic counseling (4%), or both (8%). When asked what topic they would choose for a quality improvement project, genetic testing and counseling was the most frequent choice (46%), followed by clinical trials enrollment and availability (23%), multidisciplinary team care (19%), education on best practices (15%), palliative care (15%), and ancillary services (15%). Conclusions: Multidisciplinary care for ovarian cancer was common across a range of cancer programs but integration of palliative care, social work, dietetics, and financial counseling could be improved. Expanding clinical trials and genetic testing and counseling were the most frequently identified opportunities to improve ovarian cancer care.

Abstract Pathogenic sequence variants (PSV) in BRCA1 or BRCA2 (BRCA1/2) are associated with increased risk and severity of prostate cancer. We evaluated whether PSVs in BRCA1/2 were associated with risk of overall prostate cancer or high grade (Gleason 8+) prostate cancer using an international sample of 65 BRCA1 and 171 BRCA2 male PSV carriers with prostate cancer, and 3,388 BRCA1 and 2,880 BRCA2 male PSV carriers without prostate cancer. PSVs in the 3′ region of BRCA2 (c.7914+) were significantly associated with elevated risk of prostate cancer compared with reference bin c.1001-c.7913 [HR = 1.78; 95% confidence interval (CI), 1.25–2.52; P = 0.001], as well as elevated risk of Gleason 8+ prostate cancer (HR = 3.11; 95% CI, 1.63–5.95; P = 0.001). c.756-c.1000 was also associated with elevated prostate cancer risk (HR = 2.83; 95% CI, 1.71–4.68; P = 0.00004) and elevated risk of Gleason 8+ prostate cancer (HR = 4.95; 95% CI, 2.12–11.54; P = 0.0002). No genotype–phenotype associations were detected for PSVs in BRCA1. These results demonstrate that specific BRCA2 PSVs may be associated with elevated risk of developing aggressive prostate cancer. Significance: Aggressive prostate cancer risk in BRCA2 mutation carriers may vary according to the specific BRCA2 mutation inherited by the at-risk individual.