[16] Zuradelli Zuradelli M M Four new cases of double heterozygosity for BRCA1 and BRCA2 gene mutations: clinical, pathological, and family characteristics Four new cases of double heterozygosity for BRCA1 and BRCA2 gene mutations: clinical, pathological, and family characteristics Breast Cancer Res Treat Breast Cancer Res Treat 2010 2010 124 124 1 1 251 251 8 8 20373018 20373018. The gene discussed is BRCA2; the disease is breast carcinoma.