A CASE OF GASTROINTESTINAL STROMAL TUMOR OF THE SMALL INTESTINE RESECTED SUCCESSFULLY

Abstract

An 82-year-old woman had undergone an operation for a tumor of the uterine body at the department of gynecology in our hospital, which resulted in an exploratory laparotomy because it was determined to be inoperable due to severe infiltration into the surrounding tissues in December, 1995. Intraoperative biopsy of the tumor revealed spindle cell tumor. While she was followed in the gynecological clinic thereafter, an abdominal pain and a feeling of oppression in the abdomen appeared. So she was admitted to the department. On admission, the tumor was 13×11cm in size on an abdominal CT scan and fistulization between the small intestine and tumor was revealed on UGI. In March 1999, an operation for bypass formation was performed when the tumor was found not to arise in the uterine and was easily dissected from the uterine. The tumor with the small intestine by 150cm in length was successfully removed. Gross study of the resected material showed that the tumor originated from the small intestine. Immunohistologically, the tumor was positive for smooth muscle action, vimentin, and c-kit, while negative for CD34. Gastrointestinal stromal tumor (GIST) of the small intestine was definitely diagnosed.