Abstract
A 68-year-old male visited our department complaining of abdominal pain. Abdominal CT scan showed an intestinal tumor. Small intestinal fiberscopy showed a tumor at the upper part of jejunum. The tumor was about 3cm in diameter. Immunohistologically, its diagnosis was GIST (positive for CD34, negative for desmin and S-100) . Partial resection of jejunum was performed.
GIST is a common gastrointestinal mesenchymal tumor, but its diagnosis is difficult before operation. If tumor invated near epithelial tissue, magnifying endoscopy can reveal thin epithelium. Its examination will be possible to determine the point of biopsy. Small intestinal fiberscopy, moreover magnifying endoscopy is effective for deagnosis of the small intestinal tumor.
