Regarding the difference found in the family history of women with mutations in BRCA1 or BRCA2 genes, we can observe that BRCA1 mutated families showed a higher frequency of bilateral breast cancer (OR=4.96 vs. OR=1.67) and presence of ovarian cancer (OR=4.32 vs. OR=1.63). This evidence concerns the gene BRCA1 and breast carcinoma.