Congenital Segmental Giant Megaureter Presenting as Cystic Abdominal Mass in a Child

A six years old male child presented with gradually progressive distension of abdomen since one year of his age. Imaging suggested it as a large mesenteric cyst. Further evaluation and intra-operative findings suggested it to be bilateral congenital megaureter with giant one on the left side which was causing gross abdominal distension. Excision of left megaureteric segment, psoas hitch and ureteroneocystostomy was performed. Excision, tapering and uretereroneocystostomy of right ureter was performed. Congenital giant megaureter should be considered as one of differential diagnosis in children presenting as abdominal mass.