A Case of Contained Rupture of the Common Iliac Artery with Idiopathic Retroperitoneal Fibrosis: Efficacy of Surgical Treatment and Immunosuppressive Therapy at 2-Year Follow-Up.

Rupture of inflammatory aortic aneurysm associated with retroperitoneal fibrosis (RF) is rare. We report a 62-year-old man with an inflammatory abdominal aortic aneurysm (IAAA) complicated with idiopathic RF, resulting in a contained rupture of the common iliac artery. The patient also presented with mild renal insufficiency due to urethral obstruction and left hydronephrosis. Surgical procedures including graft replacement and ureterolysis relieved the symptoms. Postoperative immunosuppressive treatment using corticosteroid and methotrexate successfully maintained clinical remission without signs of recurrence of RF and IAAA at the 2-year follow-up.