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The incidence of post-operative stenosis after esophageal Endoscopic Submucosal Dissection (ESD) ranks high. This study aimed to investigate the association between the degree of muscular injury and the incidence of post-operative stenosis. This was a retrospective study of 133 patients with superficial esophageal lesions treated by non-circumferential ESD enrolled between January 2016 and May 2021 at two endoscopy centers. Demographic and clinical parameters were analyzed. A novel muscular injury classification system was proposed. Stenosis risk factors were identified using multivariate logistic regression. The association between the different degrees of muscular injury and the incidence of post-operative stenosis was investigated further by propensity score matching (PSM). There were 133 cases evaluated in this study, 33 of which developed stenosis. Multivariate analysis suggested lesions located in the upper 1/3 of the esophagus, resections &gt;5/6 of the circumference, and muscular injury (Grade 3 or 4 according to our proposed classification) were risk factors for stenosis. Correlation analysis suggested a positive association between the degree of muscular injury and the incidence of post-operative stenosis ( r  = 0.408,  p  &lt; .05). For PSM, 29 stenosis cases were matched and univariate analysis further corroborated that muscular injuries of grade 3 (OR = 6.429, 95%CI = 1.318–31.367,  p  = .021) or 4 (OR = 7, 95%CI = 1.068–45.901,  p  = .043) were risk factors for stenosis. Grade 3–4 muscular injury was identified as a risk factor of post-operative stenosis.

scandinavian journal of gastroenterology

Muscular injury was identified the risk factor of post-operative stenosis after large area but non-circumferential esophageal endoscopic submucosal dissection