RESUMEN
The massively dilated ureter is one of major therapeutic challenges that face the urologists. The goals of reconstructive procedures are the elimination of residual urine, effective ureteral peristalsis, efficient and/or urgent drainage. 6 cases of primary obstructive megaureter were presented with review of literatures. The results obtained were as follows ; 1. 6 cases were divided into 2 groups according to etiology with 4 adynamic segments and 2 intrinsic stenosis. 2. The underlying histopathologic features included 1 submucosal inflammation,2 submucosal fibrosis with inflammation and 2 submucosal fibrosis. 3. 5 cases were treated with Hendren's technique and 1 case treated by ureteral meatotomy. 4. All cases showed obvious improvement of upper tract without complication during follow-up period from 5 to 26 months.