As a developmental anomaly a membrane develops in the posterior urethra of male foetuses and results in bladder neck obstruction. The resulting increase in pressure is associated with developmental alterations from the normal.

Clinical Presentation

Symptoms range from mild symptoms of repeated urinary tract infection to obstructive uropathy. Symptoms may also include distended bladder or dilated ureters and ultimately renal failure.

  • It is not unusual for normal newborns not to pass urine for the first 24 hours.
    Consequently, failure to pass urine within this time frame does not necessarily suggest posterior urethral valves problem.


  • Abdominal ultrasound
  • Voiding cystourethrogram


  • Evaluate the patient.
  • Conduct surgical resection of the membrane.
  • Follow up.