Idiopathic retroperitoneal fibrosis.
D004194:Disease; D005767:Gastrointestinal Diseases; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D012185:Retroperitoneal Fibrosis; D012187:Retroperitoneal Space; D014513:Ureter; D014515:Ureteral Diseases
HYDRONEPHROSIS/etiology; RETROPERITONEAL SPACE/diseases; URETER/diseases