Hereditary genetic factors such as high‐risk mutations in breast cancer 1 and 2 (BRCA1 and BRCA2) genes, as well as genetic polymorphisms in multiple genes including ATM serine/threonine kinase (ATM) and genes in the tumor protein 53/MDM2 proto‐oncogene pathway are also associated with increased risk 3, 4. Here, ATM is linked to breast cancer.