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" ... What about women who have the BRCA gene, which confers a higher risk of breast cancer and ovarian cancer? (This is the gene that led Angelina Jolie to have a mastectomy and oophorectomy.) In the Icelandic population, those women, Stefansson says, have an 86% chance of having their lives shortened by cancer, but preventative surgery can change that. Do they need to be asked whether they want to know about their BRCA mutation, or should they simply be told? ... "