EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Vasiliki Kostoula, a Greek breast cancer patient, undergoes a mammography examination in an Athens hospital October 29, 2008. Kostoula had mastectomy on her right breast and currently is treated with chemotherapy. Breast cancer is the leading cause of cancer deaths among women worldwide, according to the American Cancer Society. The group estimates about 465,000 women died of breast cancer globally in 2007 and 1.3 million new cases were diagnosed. REUTERS/Yannis Behrakis (GREECE)