Abstract
Case 1 : A 34-year-old man was admitted with a chief complaint of left lower abdominal pain. The diagnosis of intestinal obstruction was made. A contrast study by long tube showed a stenosis at the ileum. An abdominal CT scan revealed an incarcerated small bowel loop at the posterior aspect of the sigmoid mesocolon. A diagnosis of internal hernia related to sigmoid mesocolon was made and an emergency surgery was performed. Laparotomy showed a strangulated intersigmoid hernia. The necrotic ileum was resected and the hernia orifice was closed with sutures.
Case 2 : A 68-year-old man was admitted with a chief complaint of lower abdominal pain. An abdominal CT scan showed the expanded discontinuous small bowel around the sigmoid mesocolon and the loop-shaped small bowel. A diagnosis of intersigmoid hernia was made and an emergency surgery was performed. At laparotomy, the incarcerated ileum was reduced. The bowel was viable and the hernia orifice was closed.
Intersigmoid hernia is a very rare clinical entity. Thirty five cases, including our cases, have been reported in Japanese literature. Contrast study by long tube and abdominal CT scan are useful for the diagnosis of intersigmoid hernia.
