title: Acute ureteropelvic junction obstruction by an aberrant blood vessel.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D011859:Radiography; D012077:Renal Artery / Q000000981:diagnostic imaging / Q000601:surgery; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery