The NICE (NBI International Colorectal Endoscopic) Classification is based on narrow-band images of colon polyps. The classification uses staining, vascular patterns, and surface patterns to

The following gallery of images is intended to present the newly evaluated characteristics in the WASP classification, but it also illustrates the problems that still

Flat polyps are difficult to identify and may be easily overlooked, particularly in the right colon, where there is sometimes limited bowel cleansing. If a