Objectives. To evaluate the methodology, feasibility, safety, and efficacy of a novel method called over-the-scope clip- (OTSC-) associated endoscopic muscular dissection for small GSMT. Methods. A pilot study on small  cm was performed. OTSC-associated endoscopic muscular dissection was based on the requirement of OTSC apparatus and ESD technique; after ligaturing the bottom of small GSMT by OTSC, ESD was performed to resect the tumors, and the wounds of ESD were closed by clips finally. All the patients were followed up for more than 3 months, and the complications during and after OTSC-associated endoscopic muscular dissection were recorded. Results. A total of 7 consecutive patients with small GSMT were included. All tumors were completely dissected without any perforation or infection during and after the procedure in all cases, while three patients had mild abdominal pain, and one experienced postoperative bleeding after the procedure which was treated by the endoscopy with titanium clips. All the patients were followed by endoscopy three months later, all the wounds healed well, and all the OTSCs were still in the gastric wall. Conclusions. OTSC-associated endoscopic muscular dissection as a novel endoscopic interventional therapy should be a convenient, safe, and effective therapy for small GSMT. The short-time outcome is excellent, whereas long-term effect is unclear, and the further follow-up is needed to schedule.

中文翻译：

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七例小胃黏膜下肿瘤的超范围夹子相关内镜肌肉解剖：基于视频的病例系列

目标。评估一种称为超范围夹 (OTSC-) 相关内窥镜肌肉解剖的小型 GSMT 新方法的方法、可行性、安全性和有效性。方法。小型试点研究 厘米进行。OTSC相关的内镜肌肉解剖是基于OTSC设备和ESD技术的要求；OTSC结扎小GSMT底部后，进行ESD切除肿瘤，最后用夹子闭合ESD创面。所有患者均随访3个月以上，记录OTSC相关内镜下肌肉剥离术中及术后并发症。结果. 共纳入 7 例小 GSMT 患者。所有病例均在术中及术后完全切除肿瘤，无任何穿孔或感染，3例患者有轻度腹痛，1例术后出血，经内镜钛夹治疗。3个月后对所有患者进行内镜随访，所有创面均愈合良好，所有OTSCs仍在胃壁内。结论。OTSC相关的内镜下肌肉剥离术作为一种新型的内镜介入治疗方法，对于小GSMT来说应该是一种方便、安全、有效的治疗方法。短期疗效极佳，长期疗效尚不明确，需进一步随访安排。