Prolapsing ectopic uretroceles in boys.

Five cases of prolapsing ectopic ureterocele are described. All five patients were boys and all had duplex kidneys; in four cases this duplication was bilateral. There was significant obstructive uropathy in all of the cases. It is easy to overlook the diagnosis of prolapsing ectopic ureterocele or to misdiagnose the condition as posterior urethral valves. The importance of careful cystourethrographic evaluation is emphasized.