(KPLR) - This week's edition of The Pulse Of St. Louis takes a closer look at breast cancer and an increase in the number of preventive mastectomies. Hollywood super star Angelina Jolie raised awareness about the issue when she announced she had a preventive double mastectomy because she carries a gene that makes it likely she will one day develop breast cancer. Learn what that gene is and signs that could suggest you may have it, too.
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