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. Here, BRCA1 is linked to ovarian carcinoma.