title: Pelvic confined idiopathic retroperitoneal fibrosis  mimicking a large tumor.
abstract: Idiopathic retroperitoneal fibrosis (IRF) entirely confined to the pelvic cavity is an extremely rare clinical entity. Herein, is described the case of a 36- year old male who presented with clinical and imaging manifestations of a large pelvic tumor. Exploratory laparotomy revealed a large mass in the right pelvis originating from the retroperitoneal space, displacing the right iliac vessels, the right ureter and the urinary bladder completely to the left. A laborious resection of the mass measuring 14 x 10cm was performed. Histopathological examination and detailed immunohistochemistry analysis were suggestive of idiopathic retroperitoneal fibrosis with no evidence of malignancy. This is a very rare case regarding localization and clinical presentation of idiopathic retroperitoneal fibrosis. We conclude that IRF should be included in the differential diagnosis of patients presenting with a pelvic mass even if there is no involvement of the typical para aortic area.
authors.affiliation: 2nd Department of Surgery, Army Veterans General Hospital, Athens, Greece. nikos_salemis@hotmail.com
authors.forename: N S
authors.initials: NS
authors.lastname: Salemis
authors.forename: E
authors.initials: E
authors.lastname: Tsiambas
authors.forename: E
authors.initials: E
authors.lastname: Tsohataridis
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D007083:Iliac Artery / Q000473:pathology; D007084:Iliac Vein / Q000473:pathology; D008297:Male; D010386:Pelvic Neoplasms / Q000175:diagnosis*; D010388:Pelvis / Q000473:pathology*; D012185:Retroperitoneal Fibrosis / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed; D014513:Ureter / Q000473:pathology; D001743:Urinary Bladder / Q000473:pathology