BRCA2 and breast cancer: Of participants 48/88 (54.5%) had BC diagnosed prior to age 70 years, mean age at first BC diagnosis was 57.7 ± 10.6 years, 47.9% (23/48) of these cases were BRCA1 carriers, 50% (24/48) are BRCA2 carriers, with data on the precise mutant gene not available in one case.