This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pediatrics
Which is not a feature of Posterior Urethral Valve 
Select and explain. 
A. Palpable bladder, B. Painful stress incontinence, C. Recurrent UTI, D. Hydronephrosis
B: Painful stress incontinence
Answer: B: Painful stress incontinence 
Explanation: 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 suppoive of the diagnosis of posterior urethral valves, but not confirmatory. Pathophysiology | Bladder pressure | Wall hyperophy + Collagen deposition | | Compliance Small amounts of urine may cause large increase in bladder pressure | Bilateral Hydronephrosis Complications Oligohydramnios - Lung hypoplasia & respiratory distress Vesicoureteral reflux Urinary stasis - UTI - Chronic kidney disease - End-stage renal failure Reference: GHAI Essential pediatrics, 8th edition