Giant hydronephrosis of a duplex system associated with ureteral ectopia: a cause of retrograde ejaculation.

Retrograde ejaculation is an extremely rare complication of the ectopic ureter or ectopic ureterocele. In the literature, only two cases have been reported worldwide. In this article the authors describe a patient who has a completely duplicated collecting system with massive dilatation of the upper pole system, which has manifested as a huge abdominal and retroperitoneal mass, complicated by retrograde ejaculation.