We report an unusual case of a pedunculated gastrointestinal stromal tumor (GIST) of the stomach with extragastric growth. An 84-year-old woman was referred to our hospital for investigation of anemia. Barium meal examination showed a defect occupying the lesser curvature of the stomach from the middle of the corpus to the fornix and an abdominal computed tomography scan, showed a lesion, 20 cm in diameter, touching the surface of the spleen. Laparotomy revealed a tumor located between the liver and spleen. As the tumor appeared to be connected with the posterior wall of the gastric corpus by a pedicle, it was resected with a pedunculated lesion of the stomach. Based on the pathological findings, the tumor was diagnosed as a GIST of uncommitted type, with low-grade malignancy.

DIC-CT is an efficacious preoperative technique as compared with MRC for the biliary tract imaging. DIC-CT may be of benefit for both patients scheduled to undergo LC and their surgeons.

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