Anterior urethral valve.
D002648:Child; D004724:Endoscopy; D006801:Humans; D008297:Male; D014521:Urethra / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D014525:Urethral Stricture / Q000151:congenital / Q000000981:diagnostic imaging* / Q000601:surgery; D014567:Urography