Case Atlas and Illustrations of Early GI Cancers: Colon

The endoscopic diagnosis of early colorectal neoplasia can be improved by using narrow-band imaging (NBI). Recently, the NBI International Colorectal Endoscopic (NICE) classification has been validated for the diagnosis of colorectal lesions using non-magnifying endoscopy. In addition, Workgroup serrAted polypS and Polyposis (WASP) classification was recommended for optical diagnosis of sessile serrated lesions. This chapter will demonstrate the examples of optical diagnosis of colorectal neoplasia using non-magnifying endoscopy with NBI.