There are close to 2,000 known BRCA1 germline pathogenic variants, many of which are loss‐of‐function frameshift pathogenic variants.34 Nine of 28 (32%) unique BRCA1 and 6 of 33 (18%) unique BRCA2 pathogenic variants were found to be recurrent in Swedish breast cancer patients (i.e., pathogenic variants that were found to occur in at least two unrelated individuals). Here, BRCA1 is linked to breast cancer.