title: Undifferentiated retroperitoneal tumor: "germ cell tumor versus lymphoma".
mesh_terms: D003937:Diagnosis, Differential; D004407:Dysgerminoma / Q000175:diagnosis* / Q000473:pathology; D006689:Hodgkin Disease / Q000628:therapy; D006801:Humans; D008223:Lymphoma / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014057:Tomography, X-Ray Computed