BRCA1 and serous adenocarcinoma: High-grade serous carcinomas were by far the most prevalent, and among this group, recurrent variants were reported in both the BRCA1 (c.1674del, c.3331_3334del, and c.5123C>A) and BRCA2 (c.3860del) genes, detected at the germline and/or somatic level.