Retrocaval ureter.
D000328:Adult; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology; D008297:Male; D014513:Ureter / Q000002:abnormalities*; D014517:Ureteral Obstruction / Q000209:etiology / Q000601:surgery*; D014684:Venae Cavae / Q000002:abnormalities*