Giant ureterohydronephrosis of the lower segment due to obstructive megaureter in a context of ureteropelvic duplication]

Ureterohydronephrosis of the lower segment in a context of ureteric duplication is a rare entity and is usually associated with vesicoureteric reflux. The authors report the case of a 35-year-old woman with giant ureterohydronephrosis of the lower segment secondary to partial ureteric duplication due to primary megaureter discovered in a context of infection. After primary percutaneous drainage of the collection, treatment consisted of partial nephrectomy with preservation of the good quality upper segment.