2018 Volume 51 Issue 4 Pages 294-300
A 74-year-old man presented with a complaint of abdominal pain. His abdomen showed muscular guarding with tenderness in the right lower quadrant and laboratory data showed a remarkable elevation of an inflammatory response. Abdominal CT showed thickness in the small intestinal wall and an abscess formation with an elevation of surrounding fat density in the right lower abdomen. We diagnosed peritonitis caused by perforation of a diverticulum of the small intestine and performed emergency laparoscopic surgery. A diverticulum was detected on the mesenteric side 30 cm proximal from the ileum end and the tip was perforated. The diverticulum resection was performed with partial ileal resection. Histopathological examination revealed the muscular layer and the mucosal lining of the diverticulum were continuous with those of the ileum. These findings yielded a diagnosis of ileal duplication. We report a rare case of a perforated ileal duplication.