Abstract
We report a rare case of extraluminal giant leiomyosarcoma of the stomach. A 60-year-old male was admitted with a palpable fist-sized tumor in the upper abdomen. Endoscopy showed a smooth elevated lesion in the posterior wall of the middle body of the stomach, but mucous membrane showed no other lesions. By endoscopic ultrasonography, the tumor was demonstrated as a heterogeneous lesion including partly anechoic area. Angiogram revealed a tumor in the middle body of the stomach similar to that in CT scanning and MRI. Wedge resection of the stomach was performed for the tumor. The resected specimen was a giant leiomyosarcoma with a pedicle. It measured 14.5×12.0×10.0cm and weighed 950ｇ. The cross section showed a solid tumor with white capsule including several parts of necrosis inside. Histologically, the tumor consisted of scattered spindle-shaped cells.
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