A. Cystic lesions originating from Renal System

1) Large hydronephrosis.

2) Polycystic Renal Disorder.

3) Bladder diverticulum.

B. Cystic lesions originating from Gastro intestinal System

1) Mesenteric cyst.

2) Gastrointestinal duplication.

C. Cystic lesions with Retroperitoneal origin or Malignancy

1) Cystic tumor.

2) Lymphangioma.

3) Teratoma.

4) Hamartoma.