Serrated Lesions of the Colon-Rectum: A Focus on New Diagnostic Tools and Current Management

Figure 2

Endoscopic pictures showing the main morphologic characteristics of sessile serrated adenoma/polyps (SSA/Ps). All lesions are located proximally to the splenic flexure. (a) Typical sessile lesion with mucous coat, dome shape, and indistinct edges. (b) The mucus looks red under NBI (narrow-band imaging). (c) SSP at the hepatic flexure encircled by a rim of debris and obscuring the course of the submucosal vein. (d) The same lesion seen in 2c at NBI. (e) Type O-IIb lesion of the ascending colon, which displays a cloud-like surface. (f) The same lesion seen in 2e at NBI. (g) Flat SSP in the distal transverse colon identified only by a subtle nodular appearance of the surface mucosa. (h) The same lesion seen in 2g at NBI (narrow-band imaging).

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