Hyperplastic polyp

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Hyperplastic polyps are generally small sessile colorectal polyps that occur anywhere in the colon, but are more common in the rectum. They are very common, occurring in up to 75% of people over the age of 60. They are caused by a defect in maturation of normal colonic epithelium, which slows the normal turnover and allows the surface epithelium to persist longer than usual. The epithelium contains an increased number of cells, and the mucosa develops a saw-tooth or scalloped configuration.