As shown in Table 3 the higher percentage of patients with a mutation in BRCA1/2 is among families with a male breast cancer (40%, only in BRCA2), followed by the group having breast and ovarian cancer cases (37.7%) being higher for BRCA1. In relation to patients with no family history the highest percentage of mutation carriers is among bilateral breast cancer patients. The gene discussed is BRCA2; the disease is breast cancer.