title: Coexistent choriocarcinoma and malignant mixed mesodermal tumor of the uterus.
abstract: OBJECTIVE
  The purpose of this article is to report a case of coexisting uterine choriocarcinoma and uterine malignant mixed mesodermal tumor (MMMT). The relevant literature is reviewed and possible pathogenesis discussed.
  
  
  METHODS
  The clinical course and histopathology of the case were reviewed and a Medline literature search for other cases was performed.
  
  
  RESULTS
  The patient's uterine tumor contained syncytiotrophoblastic and cytotrophoblastic cells that stained positively for the beta subunit of human chorionic gonadotrophin consistent with uterine choriocarcinoma. Pathology also revealed a second distinct neoplasm composed of adenocarcinoma admixed with sarcoma, compatible with a uterine MMMT. The patient experienced metastatic choriocarcinoma to her lungs, lymph nodes, and brain. She suffered a complicated clinical course and died 7 months after her initial diagnosis. The literature search revealed that various gynecologic and nongynecologic carcinomas with trophoblastic differentiation have been described, but an association with uterine MMMT has not been previously reported.
  
  
  CONCLUSIONS
  Trophoblastic differentiation and choriocarcinoma associated with gynecologic and nongynecologic tumors is rare. We document the presence of uterine MMMT coexisting with uterine choriocarcinoma that followed an aggressive clinical course and review the possible pathogenesis of this lesion.
authors: Department of Gynecology and Obstetrics, The Johns Hopkins Hospital, Baltimore, Maryland 21287, USA.
authors: C P
authors: CP
authors: Nguyen
authors: A W
authors: AW
authors: Levi
authors: F J
authors: FJ
authors: Montz
authors: R E
authors: RE
authors: Bristow
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000556:secondary; D002822:Choriocarcinoma / Q000473:pathology* / Q000556:secondary / Q000628:therapy; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000556:secondary; D018199:Mixed Tumor, Mesodermal / Q000473:pathology* / Q000556:secondary / Q000628:therapy; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000628:therapy; D014594:Uterine Neoplasms / Q000473:pathology* / Q000628:therapy