ovarian epithelial cancer (oh-VAYR-ee-un eh-pih-THEE-lee-ul KAN-ser)
Cancer that forms in the tissue covering the ovary (one of a pair of female reproductive glands in which eggs are made). Most ovarian cancers are ovarian epithelial cancers. Fallopian tube cancer and primary peritoneal cancer are similar to ovarian epithelial cancer and are staged and treated the same way. Also called epithelial ovarian cancer.