title: RETROPERITONEAL FIBROSIS--TWO UNUSUAL CASES.
mesh_terms: D001018:Aortic Diseases; D001706:Biopsy; D003937:Diagnosis, Differential; D006801:Humans; D006869:Hydronephrosis; D007813:Laparotomy; D010336:Pathology; D012185:Retroperitoneal Fibrosis; D012187:Retroperitoneal Space; D013514:Surgical Procedures, Operative; D014517:Ureteral Obstruction; D014567:Urography; D014682:Vena Cava, Inferior
keywords: AORTIC DISEASES; BIOPSY; DIAGNOSIS, DIFFERENTIAL; HYDRONEPHROSIS; LAPAROTOMY; PATHOLOGY; RETROPERITONEAL FIBROSIS; RETROPERITONEAL SPACE; SURGERY, OPERATIVE; URETERAL OBSTRUCTION; UROGRAPHY; VENA CAVA, INFERIOR