Abstract
A 13-year-old boy presented with abdominal pain and vomiting. On physical examination, his abdomen was hard with tenderness in the upper abdomen and the right lower quadrant. Abdominal enhanced CT showed findings of ileus: a dilated and saccular intestine about 12×12×6 cm in size with niveau formation in the lower abdomen and pelvis. The enhancement of the intestine was reduced. We suspected strangulation of the small intestine, so we performed an emergency operation. During the operation, we found a dilated, saccular, and necrotic intestine with purulent ascites. The intestine communicated to the ileum on the mesenteric side at 60 cm oral to the Bauhin valve. It was strangulated and developed a 360° volvulus at its base. We diagnosed volvulus duplication cyst, because the saccular intestine had a common mesentery with the ileum. We resected the necrotic tissue in the duplication cyst from the ileum. There have only been a few reports of volvulus duplication cysts. We report this case, in addition to a review of existing literature.