Congenital ureteral valves: two new cases and a review of the literature.

Ureteral valves are a rare clinical finding. Frequently they are associated with other urological anomalies such as complete or incomplete renal duplication, ectopic ureter, vesicoureteral reflux and horseshoe kidney. Hydronephrosis is the most common clinical sign. We report two cases of ureteral valves recently encountered at the Surgical Department of Sant Joan de Dèu Hospital in Barcelona, and discuss the diagnosis and surgical treatment with a review of the literature from 1926.