A Case of Gastrointestinal Stromal Tumor of the Mesentery

Koji Kubota, Michihiko Harada, Shigeyoshi Kumeda and Masako Otani*

Department of Surgery, Nagano Prefectural Kiso Hospital
Department of Pathology, Shinshu University School of Medicine*

A-66-year-old woman admitted for abdominal distension and an intraabdominal mass was found in abdominal computed tomography (CT) and magnetic resonance imaging (MRI) to have 14.5×14×6.5 cm mass between the transverse colon and left kidney. Angiography and upper gastrointestinal endoscopy suggested gastrointestinal stromal tumor (GIST) of the stomach or transverse colon with an extra gastrointestinal pedunculated growth or sarcomatous lesion in the abdominal cavity. We completely resected the tumor together with the spleen, pancreatic tail, and splenic flexure colon. Histologically, the tumor consisted of interlacing bundles of spindle-shaped cells. Immunohistochemical examination showed it to be positive for c-kit and CD34. The tumor, kept intact from the colon, spleen, and pancreas, was diagnosed as mesentery GIST. We report this rare case together with a review of the literatures.

Key words
gastrointestinal stromal tumor (GIST), extragastrointestinal stromal tumor (EGIST), mesentery

Reprint requests
Koji Kubota Department of Surgery, Shinshu University School of Medicine
3-1-1 Asahi, Matsumoto, 390-8621 JAPAN

Accepted
October 29, 2007

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