Journal of Research in Medical Sciences1735-199514520090511Pure ovarian choriocarcinoma: report of two cases327330ENNargesIzadi-MoodDepartment of Pathology, Mirza Koochak Khan Hospital. nizadimood@yahoo.comNasrinSamadiParvanehRahimi-MoghaddamSoheilaSarmadi2008101220090125Pure primary ovarian choriocarcinoma is an extremely rare condition of gestational or nongestational origin. The possibility of gestational origin can be suspected by the presence of a corpus luteum of pregnancy but definite diagnosis would be based on genetic analysis. Here, we present two cases of pure ovarian choriocarcinoma in the forth decade of life with the possibility of gestational origin.Keywords: Gestational, choriocarcinoma, ovary.