Abstract
A 62-year-old man was admitted to our hospital because of severe lower abdominal pain and pyrexia. Abdominal CT scan showed an approximately 8cm-sized cystic lesion with air and fluid occupying from the navel to slightly caudad area. The patient was operated on with a diagnosis of perforative peritonitis. Upon laparotomy, the tumor with bleeding was demonstrated in the small intestine which was about 170cm distal from the Treiz's ligament. In addition a perforation was found at a normal part of the vowel near the tumor. Two parts in the small intestine including the tumor were excised. The immunohistological findings showed positive for CD34 and C-kit, and the lesion was diagnosed as gastrointestinal stromal tumor of the small intestine.
