Abstract
We report a case of a gastrointestinal stromal tumor (GIST) with intussusceptions of the small intestine. A 62-year-old man was admitted to hospital with melena. After hospitalization the patient had abdominal pain and vomiting. Abdominal computed tomography demonstrated a multiple concentric ring sign incarcerated intestine containing a high density tumor of the small intestine. Radiography of the upper jejunum showing narrowing and a ring-shaped translucency 2.4cm in size. Surgery confirmed intussusception due to a tumor of the jejunum, and partial resection of the jejunum was carried out. An intussusception of the small-intestine tumor 3cm in diameter was found during the operation at a location 30cm from the Treitz ligament; consequently a portion of the small intestine including the tumor was resected. Histopathological examination revealed proliferation of oval-shaped mesenchymal cells. The immunohistochemical analysis revealed that the tumor cells were positive for c-kit, but negative for CD34 and α-smooth muscle actin. The tumor was diagnosed as a GIST of the small intestine, uncommitted type. GIST should be considered in the differential diagnosis of intussusception.
