Abstract
A 59-year-old man was admitted to the hospital with a diagnosis of small bowel obstruction. Abdominal computed tomography (CT) showed intussusception caused by a tumor in the small intestine. Ileocecal resection was performed under the diagnosis of ileum-to-colon intussusceptions. The resected specimen included a 6×2 cm elevated lesion in the ileum where was 60 cm proximal to the terminal ileum. Histological findings suggested that the tumor was composed of inverted true diverticulum. On pathological findings, ectopic gastric mucosa or pancreatic organization was not observed in the mucous membrane of the small intestine. We finally diagnosed this patient with intussusception caused by inverted Meckel's diverticulum, which is relatively rare in adults. Meckel's diverticulum should be considered as one of the causes of adult intussusception, although preoperative diagnosis of this disease is difficult.
