title: Primary retroperitoneal tumors: presentation, investigation, management.
mesh_terms: D000368:Aged; D006801:Humans; D008080:Liposarcoma / Q000175:diagnosis* / Q000628:therapy; D008297:Male; D008654:Mesothelioma / Q000175:diagnosis* / Q000628:therapy; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000628:therapy; D014567:Urography