BRCA1 and breast cancer: The non-carriers were outnumbered by carriers, as seen, e.g., when counting genotyped occurrences of BC diagnosed by age 60 and OC (in any age) in all branches (with or without probands): a total of 38 (14 OC, 24 BC) were found, and 28 (74%; 12 OC, 16 BC) of these occurred in heterozygous carriers of BRCA1 c.4096+3A>G (Figure 2).