TWO CASES OF GASTRIC LEIOMYOBLASTOMA

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This case report describes two patients of gastric leiomyoblastoma. The first case was a 54-year-old female who was admitted because of an abnormality on upper gastrointestinal series in a mass survey. Endoscopic examination showed a submucosal tumor with a central ulceration in the posterior wall of the gastric body. Biopsy specimens taken from the central ulceration and the artificial ulceration by the injection of pure ethanol were negative for malignancy. The second case was a 77-year-old female who was admitted because of vomiting. Since stool examination for occult blood was positive, endoscopy was performed. Endoscopic examination showed a submucosal tumor with a central ulceration in the posterior wall of the gastric body. Biopsy specimens taken from the central ulceration were negative for malignancy. In these two cases, CT showed that metastatic lesion was absent and the tumors grew intramurally. On laparotomy, frozen specimens showed leiomyoblastoma and wedge resection was performed. Endoscopic ultrasonography performed in the second case showed that the tumor was originated from smooth muscle and the internal echo of the tumor was uneven. Endoscopic ultrasonography may be a useful procedure which gives an information regarding the nature and location of a submucosal tumor before operation.
社団法人日本消化器内視鏡学会の論文