Abstract:Abstract: Objective?To study the correlation between endoscopic duodenal papillary sphincterotomy and colorectal adenoma.?Methods?Clinical data of patients underwent colonoscopy from January 2006 to December 2018 were retrieved. Patients with more than 1 year of history of duodenal papillectomy were included in the observation group. In the corresponding period, functional gastrointestinal patients who underwent colonoscopy but had no history of duodenectomy were selected as the control group at the ratio of 1?~?2. The detection rate, location and pathological type of colorectal adenoma in the two groups were statistically analyzed, and the influence of confounding factors was excluded by Logistic regression analysis.?Results?The detection rate of colorectal adenoma in the EST large-incision group was significantly different from that in the control group (P?=?0.008). Logistic regression analysis showed that EST large incision group (P?=?0.027) and male (P?=?0.017) were the risk factors for colorectal adenoma. According to the comparison between the EST large incision group and the control group, there was no statistically significant difference between the location of adenoma (P?=?0.233) and the pathological classification of adenoma (P?=?0.926).?Conclusion?Duodenal papillary colorectal sphincterotomy and male are the risk factors for colorectal adenoma, therefore, the screening of adenoma in such patients should be paid attention to. At the same time, in order to protect the function of duodenal papillary sphincter as much as possible, the clinician should strictly grasp the EST indications and choose the appropriate operation.