title: Adenocarcinoma of the endometrium with trophoblastic differentiation and metastases as choriocarcinoma: a case report.
abstract: Nongestational choriocarcinoma is seldom observed outside of gonads or teratomas. No case of choriocarcinoma arising in endometrium is reported in the literature. Here we present a 70-year-old female with endometrial adenocarcinoma focally differentiating to choriocarcinoma, and metastasizing to liver, kidney, brain, and lung as pure choriocarcinoma. Foci of trophoblastic differentiation in the primary endometrial lesion and metastatic lesions are positive for hCG by immunocytochemical stain. This case is similar to gastrointestinal and lung carcinomas that contain trophoblastic change. Possible histogenesis of this tumor is discussed.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000473:pathology; D000368:Aged; D002822:Choriocarcinoma / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000473:pathology / Q000556:secondary; D009362:Neoplasm Metastasis; D011247:Pregnancy; D014328:Trophoblastic Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014594:Uterine Neoplasms / Q000175:diagnosis* / Q000473:pathology