ATM and breast carcinoma: Interestingly, ATM c.2289T>C (p.F763L), along with two other variants currently classified as likely benign, BRCA2 c.2926_2927delinsAT (p.S976I) and RAD51D c.251T>A (p.L84H), were determined to be associated with African American breast cancer risk when compared to ethnic-specific controls (Table 4).