| Summary: | Colorectal cancer (CRC) is one of the most common tumors in the world. Colorectal polyps are local protuberant lesions that elevate the intestinal mucosa, and about 90% of CRC is evolved from polyp. According to the traditional concept, the occurrence and development of CRC is mostly through the "adenoma-cancer" sequence. However, studies have found that serrated polyps also form subclasses with different morphology and genes, and are closely related to microsatellite unstable CRC. About 15%-30% of CRC develops through the "serrated polyp-cancer" pathway. This article mainly reviewed the clinical characteristics of colorectal adenoma, serrated polyp and post-inflammatory polyps, through retrospective analysis of large samples, to summarize the incidence of different pathological types of colorectal polyps in the progression of carcinogenesis and the follow-up monitoring after polypectomy, so as to provide a better reference for follow-up monitoring of polyp patients and early screening and treatment of precancerous lesions.
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