Comparison of different virtual chromoendoscopy classification systems for the characterization of colorectal lesions.

Background And Aim: Commonly used classifications for colorectal lesions (CLs) include the Narrow Band Imaging (NBI) International Colorectal Endoscopic (NICE) and Japan NBI Expert Team (JNET) classifications. However, both lack a sessile serrated adenoma/polyp (SSA/P) category. This has been addressed by the modified Sano's (MS) and Workgroup serrAted polypS and Polyposis (WASP) classifications.

Learning curve for mastery of colorectal endoscopic submucosal dissection: Perspectives from a large Japanese cohort.

Background And Aim: Endoscopic submucosal dissection (ESD) is a challenging procedure. A dissection speed of ≥9 cm/h has been acknowledged as a mark for expertise, alongside a complication rate of ≤5% and en bloc resection rate of ≥90%. However, there is lack of objective information on whether the three measures correlate with each other.