In a previous study, we performed a systematic pathology review of breast tumors from 21 ATM PV carriers from A-T families and 18 PV or predicted PV carriers from Hereditary Breast and Ovary Cancer families (including patients enrolled in CoF_AT2 and GENESIS), and we found that ATM-associated breast tumors belong mostly to the luminal B subtype in a retrospective tumor [38]. Here, ATM is linked to neoplasm.