title: Idiopathic pelvic fibrosis. Report of a case with unusual histologic and radiographic features.
mesh_terms: D003094:Collagen; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009130:Muscle, Smooth / Q000473:pathology; D012185:Retroperitoneal Fibrosis / Q000150:complications*; D014517:Ureteral Obstruction / Q000209:etiology*; D001743:Urinary Bladder / Q000000981:diagnostic imaging; D014567:Urography
chemical_list: D003094:Collagen