| International Session (Workshop) 1 (JGES・JSGE) |
| Sat. November 3rd 9:00 - 12:00 Room 13: Kobe International Conference Center International Conference Room |
| The Japan NBI Expert Team (JNET) classification of colorectal lesions | |||
| Yasushi Sano1, Mineo Iwatate1, Daizen Hirata1 | |||
| 1Gasrtrointestinal Center and Institute of Minimally-Invasive Endoscopic Care (iMEC), Sano Hospital | |||
|
|||
|
|||
| Narrow band imaging (NBI) has contributed greatly to real-time optical diagnosis of colorectal polyps and gastrointestinal tumors through clearer visualization of the microvascular architecture and surface structure. Several magnifying NBI classifications of colorectal tumors have been proposed and validated in Japan. Sano et al. were the first to publish a magnifying NBI classification known as the Capillary Pattern classification (Sano classification) in 2006. On the basis of this classification, other magnifying NBI classifications (Hiroshima, Showa, and Jikei classifications) were proposed by several institutions. However, this led to confusion among novice endoscopists because each classification used different terminologies for similar NBI findings. Against this background, the Japan NBI Expert Team (JNET) was organized in 2011 to develop a universal magnifying NBI classification. The team comprised 38 members from 26 institutions throughout Japan, including the proposers of each of the existing magnifying NBI classifications. The JNET working group held discussions and created common evaluation criteria, known as the NBI scale, for VP and SP based on the NBI International Colorectal Endoscopic (NICE) classification. This scale consisted of four categories: type 1 corresponded to the most likely pathology for hyperplastic polyp/sessile serrated polyp; type 2A for low-grade intramucosal neoplasia (LGIN) including intramucosal cancer with low-grade structural atypia; type 2B for high-grade intramucosal neoplasia (HGIN)/shallow submucosal invasive cancer (S-SMC); and type 3 for D-SMC. Furthermore, VP in the NBI scale was classified as the polypoid type or the non-polypoid type. We have investigated a web-based image interpretation study which was to create basic data for development of the JNET classification by validating the findings used in the NBI scale, as well as the necessity of individual criterion. From the results of this study, we have unified the four previous magnifying NBI classifications to develop the JNET classification of colorectal lesions, which will be continuously updated as new findings and endoscopy innovations are achieved. It is expected that validation studies for the JNET classification will be conducted worldwide. |
|||
|
Index Term 1: Narrow band imaging （NBI） Index Term 2: The Japan NBI Expert Team （JNET） classification |
|||
| Page Top | |||