Gastric Schwannoma with an Increase in Size during Observation, Report of a Case Tetsuji Kudo 1 , Motohiro Esaki 1 , Mitsuo Iida 2 1Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University Keyword: 胃粘膜下腫瘍 , 神経鞘腫 , GIST pp.706-711
Published Date 2004/4/24
DOI https://doi.org/10.11477/mf.1403100512
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 A30-year-old female was referred to our institution, because of a gastric tumor which had increased in size during a4-year period of observation. Radiography depicted a smooth semispherical tumor in the anterior wall of the upper gastric body. It measured5.5cm in size. Under EGD, the tumor was observed as a sessile, submucosal tumor with intact overlying mucosa. EUS showed the tumor to be a hypoechoic mass in the fourth layer of the gastric wall. Because annual radiography showed the tumor to have increased in size, it was laparoscopically enuclulated. Microscopic examination revealed the tumor to be composed of spindle-shaped cells arranged in trabecular bundles without any mitotic figures. Lymphoid cuff was observed in the surface area of the tumor. Immunohistochemically, the tumor cells were positive for S-100protein, but they were negative for c-kit,CD34,α-SMA and desmin. Based on these findings, the diagnosis of benign gastric schwannoma was established.

 1) Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

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