Abstract
A 39-year-old man presented with right lower abdominal pain. Palpation revealed severe right lower abdominal tenderness and laboratory data showed inflammation. Enhanced abdominal computed tomography showed an inflammatory mass in the right lower abdomen. We diagnosed acute panperitonitis due to appendix perforation and performed single-port laparoscopic surgery. Laparoscopy showed a normal appendix and the presence of contaminated ascites. An inflammatory mass, with a hole at the base, was detected on the mesenteric side about 90 cm proximal to the end of the ileum. Mass resection was performed with partial ileal resection. Histological examination indicated intestinal duplication with perforation. Intestinal duplication with peritonitis is rare in adults, and laparoscopic surgery is useful for diagnosis and treatment of this condition.
