Characterisation of Colorectal Lesions: NICE, WASP, Modified Sano, JNET - Simplified and Explained 20 Aug 2021 14:12 14:24

Characterisation of Colorectal Lesions: NICE, WASP, Modified Sano, JNET - Simplified and Explained 20 Aug 2021 14:12 14:24

(12 mins)
Yasushi Sano Speaker
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Many clinical studies on narrow-band imaging (NBI) magnifying endoscopy classifications advocated so far in the world (Sano, Hiroshima, Showa, and Jikei classifications, NICE, WASP, Modified Sano) have reported the usefulness of NBI with/ without magnifying endoscopy for qualitative and quantitative diagnosis of colorectal lesions. However, discussions at professional meetings have raised issues such as i) the presence of multiple terms for the same or similar findings, ii) the necessity of including surface patterns in magnifying endoscopic classifications, and iii) differences in the NBI findings in elevated and superficial lesions. To resolve these issues, the Japan NBI Expert Team (JNET) was constituted with the aim of establishing a universal NBI magnifying endoscopic classification for colorectal tumors (JNET classification) in 2011. Consensus was reached on this classification using the modified Delphi method, and this classification was proposed in June 2014. The JNET classification consists of 4 categories of vessel and surface patterns, i.e., Types 1, 2A, 2B, and 3. Types 1, 2A, 2B, and 3 are correlated with the histopathological findings of hyperplastic polyp/sessile serrated polyp (SSP), low grade adenoma, high grade adenoma, and deep submucosal invasive cancer, respectively. In this session, I would like to propose a standard method for diagnosing colorectal tumors using IEE in the future.

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