Introduction: Intestinal duplications are congenital lesions, which can exist without clinical presentation. The aim of the study is to point out that some of them are the rare cause of acute abdomen in children. Authors have to take care of them in differential diagnostics. Patients and methods: Authors present 3 patients admitted at the Department of Pediatric Surgery in Bratislava. Non specific clinical picture originated from intestinal duplication. Symptoms varied fromweakmeteorismto typical picture of acute abdomen caused by mechanical intestinal obstruction. Abdominal ultrasound made a difference in the diagnostics with presentation of small cyst with thick wall. Results: All the children were operated on, the cyst was removed and resection of the contiguous part of the intestine with primary anastomosis was done. There were no complications after the operation. Conclusion: Intestinal duplications have non specific clinical presentation. It seems that abdominal ultrasound makes the difference in the diagnostics. The typical finding is the small cyst with thick wall, which can be enough for surgical exploration.

        Key words: intestinal duplication, acute abdomen, children