Pathology of Non-epithelial Ovarian Tumors

Non-epithelial ovarian tumors have posed pathologic diagnosis and management challenges. The World Health Organization classification of Tumors of Female Reproductive Organs was revised in 2014, and the new version addresses several new concepts and the histological classification of non-epithelial ovarian tumors and tumor-like lesions that were not previously included. In the new WHO classification, sex cord-stromal tumors is divided into three categories, pure stromal tumor, pure sex cord tumor, and mixed sex-cord tumor.