超音波内視鏡で胃平滑筋芽腫が疑われた１例

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  • A Case of Gastric Leiomyobalstoma and Usefulness of Endoscopic Ultrasonography.

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A 47-year-old woman was admitted to our hospital because of abnormal findings in a gastrointestinal series, without any symptoms. An elevated lesion, Yamada type II, was found in the gastric body upon examination by a gastrointestinal series and gastroendoscopy. Endoscopic ultrasonography revealed an abnormal heteroechoic mass with almost clear margins in the fourth layer of the stomach, wall. The diagnosis was a submucosal tumor originating from smooth muscle tissue. Exploratory laparotomy revealed a thumb headsized mass without apparent metastasis or direct invasion into the surrounding organs, and local excision was performed. Histological examination of the specimen showed leiomyoblastoma, with oval-shaped cells each containing a clear space near the nucleus, and medullary growth. Thus, endoscopic ultrasonography was shown to be useful for imaging details of the tumor, suggesting the possibility of diagnosis before surgery.

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