Abstract
Introduction: A narrow safety margin (NSM) after endoscopic submucosal dissection (ESD) is a well-recognized risk factor for local recurrence in early gastric cancer (EGC). However, only a few studies have investigated the risk factors for the development of NSM. Methods: The medical records and pathologic specimens of patients with EGC who underwent ESD from January 2020 to December 2020 at a single tertiary hospital (Daejeon, South Korea) were reviewed. Results: A total of 218 patients were enrolled and 29 had NSM (<3 mm). When comparing the NSM and the control groups, the size of the lesion, the depth of invasion, and the operating endoscopist were found to be risk factors for the development of NSM. The increased length of the subepithelial spread of the lesion was associated with a narrower safety margin. Logistic regression analysis revealed that lesion size was a risk factor for NSM, and a marginally significant difference between endoscopists was found. Conclusions: Multiple factors may need to be considered during ESD, including lesion size, invasion depth, operating endoscopist, and subepithelial spread.
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