Abstract:Objective To compare the clinical efficacy and safety of pre-cut-endoscopic mucosal resection (Pre-cut-EMR) and endoscopic submucosal dissection (ESD) for non-ampullary duodenal lesions.Methods Clinical data of 64 patients diagnosed as non-ampullary duodenal lesions in Ningbo Medical Center Lihuili Hospital from June 2015 to June 2021 were retrospectively analyzed. 30 patients underwent Pre-cut-EMR and 34 patients underwent ESD. The lesion characteristics, operation time, complication rate, block resection rate, R0 resection rate and postoperative histopathological results were compared between the two groups.Results There were no significant differences between the two groups in the macroscopic morphology of lesions, delayed bleeding rate, block resection rate, R0 resection rate and postoperative pathology (P > 0.05). Endoscopic resection was successfully completed in all the patients, with the block resection rate of 100.0% and R0 resection rate of 96.9%, and no postoperative delayed perforation occurred. The operation time of the Pre-cut-EMR group was (24.6 ± 6.5) min, which significantly shorter than that of the ESD group (37.5 ± 9.5) min, and the intraoperative perforation rate was 3.3% (1/30), which significantly lower than that of the ESD group 23.5% (8/34), the difference were statistically significant (P < 0.05). The lesions diameter in the Pre-cut-EMR group was 1.40 (1.30, 1.70) cm, smaller than that in the ESD group 1.45 (1.30, 2.00) cm, but the difference was not statistically significant (P > 0.05), while the proportion of Pre-cut-EMR group with lesions diameter ≥ 2.0 cm was 10.0% (3/30), lower than that of ESD group 32.4% (11/34), the difference was statistically significant (P < 0.05).Conclusion The efficacy is comparable between Pre-cut-EMR and ESD for treating non-ampullary duodenal lesions, Pre-cut-EMR has shorter operation time and lower intraoperative perforation rate, Pre-cut-EMR is safe and effective in treating lesions with diameter < 2.0 cm.