<prompt> The most common cause of Urinary Ascitis is:Pelviureteral junction obstructionPosterior urethral valvesUrethral structureNone of the above  <response>: 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. 