BRCA1 and breast cancer: Analyses of PrCa relative risks (RR) in male mutation carriers in breast cancer families from the Breast Cancer Linkage Consortium showed an RR of 4.65 (95% CI: 3.48–6.22) of PrCa in male BRCA2 mutation carriers (the RR is 7.33 below the age of 65 years) and of 1.07 (0.75–1.54) in BRCA1 carriers (with an RR of 1.82 (1.01–3.29) for men under 65 years of age) (Thompson and Easton, 2001, 2002).