Posterior urethral valves
From Radipedia
- Chronic urethral obstruction due to fusion and prominence of plicae colliculi, normal concentric folds of urethra
- Abrupt transition on VCUG from dilated posterior urethra to small bulbous urethra at the level of the valves, actual valve tissue may not be visible
- Exclusively males
- Most common cause of bilateral hydronephrosis in a male infant
- Thickened bladder wall
- Associated with oligohydramnios, pulmonary hypoplasia and cystic renal dysplasia
