Diagnosis?
The diagnosis of posterior urethral valves is made by radiographic imaging with ultrasound and voiding cystourethrogram. Ultrasound will usually show a dilated urethra, bladder, and kidneys; it is supportive of the diagnosis of posterior urethral valves, but not confirmatory. Voiding cystourethrogram is the most definitive study for diagnosis and will show a characteristic dilated and often elongated posterior urethra and abrupt transition to a narrower distal urethra, thickened bladder wall with trabeculations,bladder diverticulum and vesico-ureteric reflux. Occasionally, confirmation of valves with cystoscopy (small camera is inserted into the urethra for direct visualization of valves) is required.