Patients with germline BRCA mutations who were diagnosed with breast cancer at or before age 40 and who underwent a bilateral risk-reducing mastectomy (RRM) and/or a risk-reducing salpingo-oophorectomy (RRSO) had lower rates of recurrence, secondary breast and/or ovarian malignancies, and death than those who did not undergo these surgeries, according to results presented at the San Antonio Breast Cancer Symposium (SABCS), held December 10-13, 2024.