Abstract:Abstract: Objective?To explore the clinical effect of endoscopic submucosal dissection (ESD) with pocket-creation method for early colorectal carcinoma and precancerous lesions.?Methods?ESD with pocket-creation method was applied to 23 patients with early colorectal carcinoma and precancerous lesions from April 2017 to December 2018. The clinical data were recorded and analyzed retrospectively.?Results?The longest diameter of the lesions was 1.8 ~ 4.5 cm; The operating time was 25.0 ~ 140.0 min; no intraoperative bleeding or delayed bleeding; no intraoperative or delayed perforation; the resection rate of the en block was 100.0%. Postoperative pathological evaluation showed that 14 cases of adenoma with low-grade intraepithelial neoplasia, 6 cases of adenoma with high-grade intraepithelial neoplasia, 2 cases of adenoma with intramucosal carcinoma, negative horizontal and vertical incision margins. The complete resection rate was 95.7% (22/23). 1 case of adenoma with high-grade intraepithelial neoplasia, local carcinogenesis with submucosal infiltration, positive vertical incision margin, and additional surgery were performed. No local recurrence or distant metastasis was found in all follow-up patients, and the cure resection rate was 95.7%.?Conclusion?ESD with pocket-creation method is safe and effective in the treatment of for early colorectal carcinoma and precancerous lesions.