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[Atypical intraperitoneal cystic masses].

Omental, mesenteric and retroperitoneal cystic masses are very rare in pediatric population. They usually present as asymptomatic abdominal tumors and only occasionally a preoperative diagnosis is made. We presented 4 cases presented to our hospital during a 2-year period. All patients were male with an age ranged from 5 months to 7 years. Three patients had previous diagnosis of cystic mass by abdominal ultrasound. Three patients presented with acute abdomen and one patient with bowel obstruction. All patients underwent successful resection of the mass with no perioperative mortality.