title: Endometrioid carcinoma of the endometrium with choriocarcinomatous differentiation: a case report and review of the literature.
abstract: OBJECTIVE
  An endometrioid adenocarcinoma (EAC) with true trophoblastic differentiation is a rare event with a highly aggressive clinical course.
  
  
  METHODS
  We report an endometrioid adenocarcinoma of the endometrium in which there was a morphologically conventional-appearing EAC component admixed with multinucleated giant cells and large pleomorphic tumor cells that resembled a choriocarcinoma without an elevated serum level of human chorionic gonadotropin (hCG) in a 42-year-old unmarried woman with a history of abnormal uterine bleeding. A total abdominal hysterectomy, bilateral salpingo-oophorectomy, and pelvic lymph node dissection were performed. Histopathologic study of the specimen showed endometrioid adenocarcinoma extended to the deep myometrium with a focus of hemorrhagic and necrotic tumor composed of multinucleated giant cells, large pleomorphic tumor cells, suggesting choriocarcinomatous differentiation (CD). Immunohistochemical studies demonstrated intense reactivity of tumor cells for human chorionic gonadotropin (hCG) confirming the diagnosis. A complete clinical workup ruled out metastatic spread to the brain, lungs, skeleton, or abdomen. The patient was alive with no evidence of disease 6 months later.
  
  
  CONCLUSIONS
  Although endometrioid adenocarcinoma with choriocarcinomatous differentiation is known to behave in a more aggressive course, this disease may have a good prognosis with a clinically indolent course when it is small, and without elevated serum hCG levels.
authors: Department of Pathology, Pamukkale University School of Medicine, Morfoloji Binasi, Kinikli, 20070 Denizli, Turkey. makbulut@pau.edu.tr
authors: Metin
authors: M
authors: Akbulut
authors: Hulya
authors: H
authors: Tosun
authors: Mehmet Emin
authors: ME
authors: Soysal
authors: Ozer
authors: O
authors: Oztekin
mesh_terms: D000328:Adult; D018269:Carcinoma, Endometrioid / Q000473:pathology* / Q000601:surgery; D002822:Choriocarcinoma / Q000473:pathology* / Q000601:surgery; D006063:Chorionic Gonadotropin / Q000097:blood; D016889:Endometrial Neoplasms / Q000473:pathology* / Q000601:surgery; D005187:Fallopian Tubes / Q000601:surgery; D005260:Female; D006801:Humans; D007044:Hysterectomy; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000601:surgery; D010052:Ovariectomy
chemical_list: D006063:Chorionic Gonadotropin