<prompt> Urinary ascites is due to -Injury to bladder during bihUreteric obstructionCong. urethral atresiaAll  <response>: Answer All Urinary ascites actually represent a transudation of retroperitoneal urine across thin and permeable peritoneum. Most common lesion associated with urinary ascites is --- posterior urethral valve Second most common cause hydronephrosis due to tong. pelviureteral jn. obstruction Other causes are - Urethral stricture - Urethral atresia - Other bladder outlet obstructions Ectopic ureterocele Neurogenic bladder Hydrocolpos Sacrococcygeal teratoma Bladder perforation secondary to traumatic delivery Urachal lacerations secondary to umbilical aery catheterisation. 