title: The value of ultrasonography as an aid in the treatment of idiopathic retroperitoneal fibrosis.
mesh_terms: D000368:Aged; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011241:Prednisone / Q000627:therapeutic use; D012185:Retroperitoneal Fibrosis / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000473:pathology / Q000601:surgery; D014463:Ultrasonography
chemical_list: D011241:Prednisone