Abstract:Objective To investigate the efficacy of endoscopic submucosal dissection (ESD) in treatment of large area early esophageal cancer.Methods Retrospectively analyzed the data of 179 patients with large-area early esophageal cancer from December 2013 to December 2020. Then analyzed the safety (late perforation rate, gas related complications, bleeding rate, stenosis rate) and effectiveness (en bloc resection rate, curable resection rate, local recurrence rate) of ESD treatment with different layers.Result The 3 cm ≤ d < 5 cm group, 5 cm ≤ d < 7 cm group and d ≥ 7 cm group in late-onset perforation rate of 0.00%, gas related complication rates were 5.21%, 8.33% and 13.04%, and bleeding rates were 1.04%, 3.33% and 8.70% respectively, the en bloc resection rate were 98.96%, 95.00% and 91.30%, the difference of gas related complications rate, bleeding rate, the en bloc rate in three groups had no statistical significance (P > 0.05); The stenosis rates of the three groups were 9.38%, 23.33% and 47.83%, respectively, and the stenosis rate increased with the increase of the diameter and length of the lesions, with statistical significance (all P < 0.05). In 3 cm ≤ d < 5 cm group and 5 cm ≤ d < 7 cm group, the curative resection rates were 95.83% and 85.00%, respectively, which decreased with the increase of lesion, and the local recurrence rates were 3.13% and 11.67%, respectively, which increased with the increase of lesion diameter, with statistical significance (all P < 0.05). There was no significant difference in curative resection rate (85.00% and 69.57%) and local recurrence rate (11.67% and 21.74%) between 5 cm ≤ d < 7 cm group and d ≥ 7 cm group (all P > 0.05).Conclusion ESD is effective and safe in the treatment of large area of early esophageal cancer, the length of the lesion is between 3~7 cm. The curative resection rate is inversely proportional to the diameter of the lesion, and the local recurrence rate is positively proportional to the diameter of the lesion. d ≥ 7 cm group has low efficacy, and the lesion scope, depth, and stenosis risk should be carefully evaluated for this type of lesion.