title: [Retroperitoneal chorioepithelioma].
mesh_terms: D000328:Adult; D002822:Choriocarcinoma / Q000000981:diagnostic imaging*; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D008297:Male; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*
vernacular_title: Co to jest?