BRCA2 and ovarian cancer: Of the women with low familial risk of breast and ovarian cancer (diagnosed 36 to 50 with no family history of breast or ovarian cancer], 6.4% and 1.7% of women with TNBC and non-TNBC were found to be BRCA1 carriers, respectively, whereas 2.1% and 5.0% were BRCA2 carriers.