title: Diagnostic challenges in extrauterine epithelioid trophoblastic tumours: a report of two cases.
abstract: BACKGROUND
  Epithelioid trophoblastic tumour (ETT) is a rare condition with a paucity of cases reported in the literature.
  
  
  METHODS
  We present two unusual cases of ETT. Both patients presented with markedly elevated hCG levels; one case presented with a mass in the gallbladder, the other with extensive metastases; and both patients died from disease.
  
  
  CONCLUSIONS
  To gain a greater understanding of the nature and progression of this disease, reporting of cases in the literature should be thorough and contain detailed information on patient clinicopathological characteristics and treatment. To enable identification of prognostic factors, long-term follow up must also be reported because recurrence can be both late and complex.
authors: Department of Gynaecological Oncology, Sheffield Teaching Hospitals NHS trust, Sheffield, UK.
authors: M C
authors: MC
authors: Macdonald
authors: J E
authors: JE
authors: Palmer
authors: B W
authors: BW
authors: Hancock
authors: J A
authors: JA
authors: Tidy
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D014328:Trophoblastic Neoplasms / Q000175:diagnosis*; D014594:Uterine Neoplasms / Q000175:diagnosis*