title: Anterior urethral valve as cause for urinary obstruction: a case report.
mesh_terms: D002675:Child, Preschool; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D014521:Urethra / Q000473:pathology; D014522:Urethral Diseases / Q000151:congenital* / Q000175:diagnosis / Q000473:pathology; D014525:Urethral Stricture / Q000175:diagnosis; D014555:Urination Disorders / Q000209:etiology*