BRCA1 and breast cancer: MRI screening was more frequent discontinued in women with a personal BC history (815/899, 91%), a positive family history (669/772, 87%), and those in the ‘Other’ increased-risk subgroup (397/455, 87%), compared to women with hereditary gene mutations (BRCA1 or BRCA2: 727/1082, 67%; other genetic risk mutations: 21/43, 49%) or a history of chest irradiation (18/57, 32%) (Table 1).