ABSTRACT
Ovarian cancer is the most frequent cause of death from gynecologic cancer among women in the USA, accounting for an estimated 22 430 new cases and 15 280 deaths in 2007.1
Ninety percent of these malignancies are epithelial in origin, with the remaining 10% comprising sex cord-stromal tumors, germ cell tumors, soft tissue tumors not specific to the ovary, unclassified tumors, and metastatic tumors. The classification of ovarian tumors has been formalized by the World Health Organization (WHO).2
