Posterior Urethral Valves

  • Etiology: anterior fusion of plicae collicularis at level of verumontanum
    — Types – Type I is 95%, Type II doesn’t exist, Type III is 5%
  • VCUG: obstruction by veil shaped valve leading to dilated posterior urethera, trabeculated thick walled bladder, bilateral hydroureteronephrosis from vesicoureteral reflux -> renal damage so kidneys can be small + echogenic on US
  • Complications: at risk post-operatively for recurrent urinary tract infections due to dilated genitourinary system
  • Clinical: in-utero can have oligohydramnios / urinoma / urine ascites, pulmonary hypoplasia due to oligohydramnios

Cases of Posterior Urethral Valves