Abstract
A 40-year-old woman was admitted to our hospital with complaints of vomiting and right lower abdominal pain. Since the abdominal CT scan did not show remarked swelling of the appendix, we started administration of antibiotic drugs. The next day, we found muscle defence on the right lower part of the abdomen. As an abdominal enhanced CT revealed acites and abscess formation ; we performed an emergency operation. In the intra-operative findigs, the cecum colon was not fixed to the retroperitoneum. The size of appendix was normal. Small intestine was sifted to the right side of the abdomen. Meckel's diverticulum was located in the ileum, 60 cm from the ileocecal valve ; showed abscess formation, and adhered to the right parietal peritoneum. We diagnosed the case as Meckel's diverticulitis with intestinal malrotation, and performed a small intestine resection and appendectomy. Histology revealed small ectopic gastric mucosa in the mucosal layer of the Meckel's diverticulum. The post operative course was uneventful, and she was discharged from our hospital 18 days after operation.