<prompt> True statement s about posterior urethral valves in neonateBilateral hydronephrosis may be presentCreatinine urea levels remain normalEnlarge widen prostatic urethraMore common in Girls  <response>: A posterior urethral valve PUV is a membranous fold within the lumen of the posterior urethra that causes functional obstruction of the urine outflow. It is a common cause of obstructive uropathy in boys during the neonatal period. Pathophysiology Bladder pressure Wall hyperophy Collagen deposition Compliance Small amounts of urine may cause large increase in bladder pressure Bilateral Hydronephrosis Reference: GHAI Essential pediatrics, 8th edition 