Wrong 50 % ??

Angelina Jolie had underwent a preventable double mastectomy this year. Now she is planning to have her both ovaries removed because she is carrying a defective gene with a possibility of 50% developing ovarian cancer. She is only 37 and her mother died in 2007 due to ovarian cancer when she was 56. The news has definitely disturbed me and million others. Yes, I do agree if you get such surgery done, you have a better survival rate, but do you feel she would lead a normal life of a woman after this kind of surgery. I have rarely come across such surgeries being done as preventive care, just because somebody has 50% chance of getting it. We all live with 50 % chance of getting many diseases, but we live with a hope that we don't belong to the "wrong " 50 %.