According to the Global Cancer Report 2020, colorectal cancer ranks third in incidence and second in mortality of cancer-related diseases worldwide [1]. Colonoscopy is currently considered the gold standard for detecting colorectal cancer and precancerous lesions [2–5]. In some cases, colorectal cancer is detected within a short interval after a negative colonoscopy, which is called post-colonoscopy colorectal cancer [6]. High-quality baseline colonoscopy is important for preventing post-colonoscopy colorectal cancer [7,8].
