title: Unusual presentation of idiopathic retroperitoneal fibrosis: case report.
abstract: Idiopathic retroperitoneal fibrosis (IRF) is an uncommon entity described as progressive proliferation of connective tissues leading to a fibrous plaque-like lesions that encases the aorta and inferior vena cava inferior to the level of the renal arteries. Mass forming retroperitoneal fibrosis is rare. We present a rare case of a unilateral focal retroperitoneal mass simulating a tumour encasing the middle third of the left ureter, with involvement of the ipsilateral scrotum.
authors.affiliation: Department of Radiology, Aga Khan University Hospital, Nairobi, P.O. Box 30270-00100, Nairobi, Kenya.
authors.forename: N
authors.initials: N
authors.lastname: Twahirwa
authors.forename: J
authors.initials: J
authors.lastname: Rees
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D012185:Retroperitoneal Fibrosis / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014516:Ureteral Neoplasms