Yeu-Sheng Tyan2026-10-162026-10-162006-07-01Pure ID: 15221018Pure UUID: 6816b917-2ea7-4224-88c5-b8d82964597110.1097/01.rlu.0000223101.94536.f8https://www.scopus.com/pages/publications/33748178333https://scholars.csmu.edu.tw/handle/123456789/30523Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the gastrointestinal tract. Approximately 70% of the tumors are found in the stomach, 20% to 30% are found in the small intestine, and less than 10% are found elsewhere in the gastrointestinal tract. An 80-year-old man with anemia underwent a whole-body tumor survey with Ga-67 citrate. Markedly increased uptake was observed in the right upper quadrant of the abdomen. Computed tomography (CT) showed situs invertus with a heterogeneous mass in the stomach and multiple rim-enhancing lesions in the liver. Histologic examination of an endoscopic biopsy specimen confirmed a gastrointestinal stromal tumor (GIST) of the stomach.4enjournal article