Schematic diagram of the colon, crypts of Lieberkühn, and associated cells. Reused from book of Gartner [2] (2021; Fig. 17.31) with original copyright holder’s permission. APUD, amine precursor uptake and decarboxylation.|@|~(^,^)~|@|Hyperplastic polyp (H&E, 200×).|@|~(^,^)~|@|Sessile serrated lesion (H&E, 200×).|@|~(^,^)~|@|Traditional serrated adenoma (H&E, 100×).|@|~(^,^)~|@|Tubular adenoma, low-grade dysplasia (H&E, 200×).|@|~(^,^)~|@|Tubular adenoma, high-grade dysplasia (H&E, 200×).|@|~(^,^)~|@|Villous adenoma (H&E, 100×).|@|~(^,^)~|@|Adenocarcinoma, well differentiated (H&E, 400×).|@|~(^,^)~|@|Adenocarcinoma, moderately differentiated (H&E, 200×).|@|~(^,^)~|@|Adenocarcinoma, poorly differentiated (H&E, 200×).|@|~(^,^)~|@|Invasive adenocarcinoma (H&E, 100×).|@|~(^,^)~|@|Narrow band imaging (NBI). Reused from the article of Muto et al. (J Gastroenterol Hepatol 2009;24:1333-1346) [11] with original copyright holder’s permission.|@|~(^,^)~|@|Texture and color enhancement imaging (TXI). Cited from the article of Sato (J Healthc Eng 2021;2021:5518948) [12].|@|~(^,^)~|@|Fuji Intelligent Color Enhancement (FICE). Reused from the article of Coriat et al. (Gastroenterol Clin Biol 2008;32:363-369) [14] with original copyright holder’s permission.|@|~(^,^)~|@|Linked color imaging (LCI). Cited from the article of Okada et al. (Clin Endosc 2016;49:207-208) [18].|@|~(^,^)~|@|i-scan. Cited from the article of Kodashima et al. (World J Gastroenterol 2010;16:1043-1049) [21].|@|~(^,^)~|@|Hyperplastic polyp, narrow band imaging.|@|~(^,^)~|@|Sessile serrated lesion, narrow band imaging.|@|~(^,^)~|@|Tubular adenoma, low-grade dysplasia, narrow band imaging.|@|~(^,^)~|@|Tubular adenoma, high-grade dysplasia, narrow band imaging.|@|~(^,^)~|@|Invasive adenocarcinoma, narrow band imaging.

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