A case of intersigmoid hernia with characteristic computed tomography findings

Abstract

A 51-year-old man was admitted due to lower abdominal pain. Plain abdominal radiography revealed intestinal obstruction. Gastrografin enema revealed no obvious abnormality. However, subsequent abdominal computed tomography (CT) scan clearly showed the small intestine located posterior to the sigmoid colon. Internal hernia related to mesosigmoid was strongly suspected, and the patient was operated on the 7th day after the onset of the disease. Laparotomy revealed that the ileum about 110 cm proximal to the terminal ileum was incarcerated into the fossa between the mesosigmoid and retroperitoneum. Intersigmoid hernia was diagnosed. We reduced the incarceration, closed the fossa, and resected the perforating portion of the ileum. Herein, report a rare case of intersigmoid hernia, and discuss the cases previously reported in Japan.