Ectopic ureterocele in nonduplicated collecting systems

Ectopic ureteroceles in nonduplicated collecting systems are rare; only 34 well-documented cases have been reported in the English-language literature. We report two cases of a single-system ectopic ureterocele associated with a nonfunctional ipsilateral kidney in two boys. Nephroureterectomy and excision of the ureterocele were performed. One of the patients had a ventricular septal defect and the other had Sotos' syndrome. An ectopic ureterocele in a nonduplicated collecting system differs from a simple ureterocele or an ectopic ureterocele of a duplicated collecting system because of its prevalence in males, the frequent presence of a nonfunctional ipsilateral kidney, and the high incidence of associated anomalies such as congenital heart disease, crossed renal ectopia, and vas deferens abnormalities.Offprint requests to: R. Gonzalez