ATLANTA, June 5, 2006 - A new multicenter study is the first to suggest that the prophylactic removal of the ovaries and fallopian tubes may provide a different benefit for women who carry a genetic mutation in the BRCA2 gene than for those who have a BRCA1 genetic mutation. The results of the study, which are being presented today at the annual American Society of Clinical Oncology meeting, also provide the strongest evidence to date that this surgery significantly reduces the overall risk of BRCA-associated breast and ovarian cancers.