Perianeurysmal fibrosis and its response to corticosteroid treatment: a computerized tomography followup in 1 case.

We report a case of bilateral hydronephrosis due to perianeurysmal fibrosis in which surgical ureterolysis could not be established due to inflammatory mass involvement of the ureteral wall. The right ureter was transected and continuity could not be restored. Therefore, the patient was treated with a high dose regimen of corticosteroids. Followup computerized tomography studies demonstrated resolution of obstruction of the left ureter and a decrease in the size of the perianeurysmal mass. The size of the mass stabilized and did not decrease any further.