Abstract
A 76-year-old woman with sudden epigastric pain and vomiting was admitted to our hospital. Gastrointestinal endoscopy revealed that a cord like mucosa involving several streaks in the gastric fornix was incarcerated in the duodenal bulb. Abdominal computed tomography scans visualized a tumor 5 cm in diameter in the duodenal bulb. The tumor was diagnosed as a gastrointestinal stromal tumor (GIST) arising from the gastric fornix after preoperative manually-assisted endoscopic reduction of the impaction was successful. A partial gastrectomy was performed via a small incision. Pathologically, the 5-cm-diameter tumor was a GIST and immunostaining revealed it was positive for KIT and CD34, and negative for desmin and S100 protein. The patient's postoperative course was uneventful. She has shown no signs of recurrence up till the time of writing. We report herein on a case of GIST of the gastric fornix presenting with ball valve syndrome.
