Yes, especially if you have younger sisters, daughters or nieces. It may not seem like a good thing, but detecting a BRCA1/2 mutation allows other women in the family to be tested and to get a clear, yes-or-no answer about their risks of developing breast and/or ovarian cancer. Men in the family should also be tested: these gene mutations confer a higher risk of prostate cancer and male breast cancer, and men may have daughters who will be at risk for inheriting the BRCA1/2 mutation.