title: Posterior urethral valves and bladder neck obstruction.
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011379:Prognosis; D014521:Urethra / Q000002:abnormalities* / Q000196:embryology / Q000601:surgery; D001748:Urinary Bladder Neck Obstruction / Q000175:diagnosis