Choriocarcinoma of the ovary.

: Six cases of primary ovarian choriocarcinoma were reviewed. Five-year follow-up was available for all patients except the most recently diagnosed case. Overall survival was 80%. The problems of distinguishing between gestational and nongestational neoplasia and differentiating primary from metastatic disease are discussed. Surgical staging of disease may be more informative in initiating aggressive chemotherapy than in determining the gestational or nongestational origin of the tumor.