The most common cause of Urinary Ascitis is:

Important points about posterior urethral valves: • Symmetrical folds of urothelium. • Common distal to verumontanum. • Occur in males only. • MC cause of urinary obstruction (Urinary Ascites) in male infant. • Cause obstruction to passage of urine and catheter. • Diagnosis is by VCUG and Endoscopy.