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A b s t r a c t A Brief History of Serrated Colorectal Polyps Before 1996, the majority of colorectal polyps were divided into 2 groups, the hyperplastic polyp (HPP), which, in many Western series, constituted the most common polyp, and adenomas, which were divided into several subgroups based predominantly on the degree of villous architecture. 1 A number ofdoi:10.1309/v2ep-tplj-rb3f-ghjl pmid:16191506 fatcat:hucxtnuinze2pf7g5uhpev47ti