Abstract
A 51-year-old man was admitted to the hospital because of a 2-month history of left lateral abdominal mass with anemia. On admission physical examination showed a movable mass with smooth surface. Contrast-enhanced abdominal CT scan showed a 12×10×20 cm mass consisting of heterogeneously enhanced solid and giant cystic lesions located in the mesenteric side of the jejunum. At laparotomy, the noninvasive cystic tumor was found to have originated from the jejunum. The content fluid was brown in color and bloody accompanied with blood clots. Pathologically, the solid part of the tumor was composed of proliferated spindle-shaped cells with intricate pattern and mitotic figure in a 5/50 high power field. Immunohistochemically, the tumor was positive for c-kit and CD34, but negative for desmin and S-100 protein. We diagnosed the case as gastrointestinal stromal tumor (GIST) with a cystic change. The patient has been disease free as of 6 months after the operation.
This case is presented, together with some bibliographical comment on a total of 37 cases, including ours, of GIST with cystic components in Japan.
