Abstract
We report a rare case of intestinal duplication with perforation. A 6-year-old boy, admitted for right lower quadrant pain and fever, underwent emergency laparotomy after being diagnosed with acute appendicitis with perforation. The appendix showed no signs of inflammation, but we found a cystic tumor with perforation at the end of the ileum on the mesenteric side, necessitating ileocecal resection. Macroscopically, the perforated 1 cm cystic tumor communicated with the ileum, in the mesentery of the terminal ileum 1.5 cm from the oral side of Bauhin's valve. Histopathologically, the cyst had the proper muscular layer and mucosal lining. The find diagnosis was a duplication cyst. This is, to our knowledge, only the 17th case of duplication cyst with peforation reported in Japan.
