Breast cancer is a leading cause of death in women. Some women have a cancer susceptibility gene known as BRCA, and women should be tested for BRCA under some circumstances. Carol Mangione, MD, division chief of General Internal Medicine and Health Services Research at UCLA, discusses when testing is appropriate, and Ranjit Manchanda, MD, PhD, from Barts Cancer Institute in London, UK, discusses the cost-effectiveness of BRCA screening for women who have had breast cancer.