title: [A 76-years-old patient with retroperitoneal mass].
mesh_terms: D000368:Aged; D002295:Carcinoma, Transitional Cell / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology*; D007682:Kidney Pelvis; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis / Q000473:pathology*; D014516:Ureteral Neoplasms / Q000175:diagnosis / Q000473:pathology*
vernacular_title: Paciente de 76 años con masa retroperitoneal.