Ureteral obstruction secondary to Crohn's disease: a need for ureterolysis?

A review of 2,368 patients with Crohn's disease identified 45 patients with hydroureteronephrosis treated with various medical and surgical regimens. Twenty-six of 30 patients undergoing both pre- and post-treatment intravenous pyelography showed resolution of the obstructed ureter, even though ureterolysis was rarely used.