The BRCA1 mutation frequency in patients diagnosed at early age who did not report a family history of breast/ovarian cancer, patients diagnosed at early age irrespective of family history, patients with a family history of breast cancer, and patients with a family history of breast and ovarian cancer were approximately 3 to 4 times higher than those observed in non-TNBC patients. This evidence concerns the gene BRCA1 and ovarian cancer.