Korean J Gastrointest Endosc.
2007 Nov;35(5):332-336.
A Case of a Pedunculated Exoluminal Gastrointestinal Stromal Tumor in the Stomach
- Affiliations
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- 1Department of Internal Medicine, Institute of Digestive Disease and Nutrition Korea University College of Medicine, Seoul, Korea. kumcchj@ns.korea.ac.kr
Abstract
- A 49-year-old man visited our hospital with a complaint of a left lower quadrant abdominal mass. Abdominal computed tomography (CT) showed an exophytic tumor attached to the stomach; the marginal region was intensely enhanced as seen on contrast imaging in the delayed phase. The gastric tumor was excised using a laparoscopic procedure. The gastric tumor was removed along with the gastric wall where the tumor was attached to by a pedicle. The external surface of the tumor showed a well-encapsulated appearance and several engorged vessels. Histologically, the tumor cells had a clear or eosinophilic cytoplasm and round nuclei. Four mitotic figures were seen per 50 cells on a high power field. Immunohistochemical staining demonstrated positive expression of c-kit, CD34, and vimentin and negative expression of smooth muscle actin (SMA) and S-100. The final diagnosis was a pedunculated exoluminal gastrointestinal stromal tumor (GIST).
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