Sequencing analyses of both tumors revealed a loss of the wild-type BRCA1 allele by loss of heterozygosity in both the acinic cell carcinoma and the invasive ductal carcinoma in association with two different somatic TP53 mutations, suggesting that acinic cell carcinoma develops independent from invasive ductal carcinoma. The gene discussed is BRCA1; the disease is invasive ductal breast carcinoma.