[A Case of Gastric Schwannoma with Tendency to Increase in Size Treated with Laparoscopic Local Gastrectomy].

The patient is a 54-year-old woman who underwent abdominal ultrasonography, which revealed a 13×10 mm submucosal tumor in the gastric antrum. The patient was initially advised to undergo follow-up observation. Over time, the gastric submucosal tumor showed slight enlargement, but histopathological analysis via endoscopic ultrasonography with fine-needle aspiration(EUS-FNA)did not reveal any obvious malignant findings. Due to the progressive increase in tumor size, the patient was referred to our department for surgical treatment. Laparoscopic local gastrectomy was performed, during which an extramural protruding mass measuring approximately 20 mm was identified on the anterior wall of the gastric antrum. The mass was resected using an automated suturing device, with excision extending from the serosa to include the muscularis mucosae. The patient had an uneventful postoperative recovery and was discharged on the 7th postoperative day. Histopathological examination of the resected specimen revealed spindle-shaped tumor cells. Immunohistochemical staining showed the tumor cells were positive for S-100, but negative for desmin, CD34, and c-kit. In this report, we present a case of gastric Schwannoma that demonstrated a tendency to increase in size and was successfully treated with laparoscopic local resection. We also include a discussion of relevant literature.