Angelina Jolie sent waves through the health-care world with her announcement that she had undergone a double mastectomy. 

The Oscar winning actress explained, in a New York Times op-ed piece today, that she carries a gene, BRCA1, that gives her an 87 percent chance of getting breast cancer. She decided to have both breasts removed as a preventative measure. 

Dr. Catherine Dang, associate director of Cedars-Sinai's Wasserman Breast Cancer Risk Reduction Program, joins the show with more information on Jolie's decision.