FANCD1 is identical to the breast cancer susceptibility gene BRCA2; because the latter gene symbol was so extremely well-established, this gene is officially named BRCA2 by the HGNC but has the alias of FANCD1. Studies reveal that FA-D1 patients have biallelic mutations in the BRCA2 gene and express a truncated protein [24]. Here, BRCA2 is linked to breast carcinoma.