title: Ultrasonic diagnosis of posterior urethral valve in neonates.
abstract: The availability of real time ultrasound units with small transducer heads has made perineal ultrasonography a practical proposition in infants. The findings of a dilated posterior urethra and bladder obstruction in a male infant indicate the high probability of a posterior urethral valve. The features seen in the urethra as well as those in the bladder and kidneys are demonstrated.
mesh_terms: D004108:Dilatation, Pathologic / Q000151:congenital / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D014463:Ultrasonography; D014521:Urethra / Q000002:abnormalities*; D014522:Urethral Diseases / Q000151:congenital / Q000209:etiology; D001745:Urinary Bladder Diseases / Q000151:congenital / Q000209:etiology