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Narrow-band imaging (NBI) magnifying endoscopic classification of colorectal tumors proposed by the Japan NBI Expert Team. 2016
Yasushi Sano, and
Shinji Tanaka, and
Shin-Ei Kudo, and
Shoichi Saito, and
Takahisa Matsuda, and
Yoshiki Wada, and
Takahiro Fujii, and
Hiroaki Ikematsu, and
Toshio Uraoka, and
Nozomu Kobayashi, and
Hisashi Nakamura, and
Kinichi Hotta, and
Takahiro Horimatsu, and
Naoto Sakamoto, and
Kuang-I Fu, and
Osamu Tsuruta, and
Hiroshi Kawano, and
Hiroshi Kashida, and
Yoji Takeuchi, and
Hirohisa Machida, and
Toshihiro Kusaka, and
Naohisa Yoshida, and
Ichiro Hirata, and
Takeshi Terai, and
Hiro-O Yamano, and
Kazuhiro Kaneko, and
Takeshi Nakajima, and
Taku Sakamoto, and
Yuichiro Yamaguchi, and
Naoto Tamai, and
Naoko Nakano, and
Nana Hayashi, and
Shiro Oka, and
Mineo Iwatate, and
Hideki Ishikawa, and
Yoshitaka Murakami, and
Shigeaki Yoshida, and
Yutaka Saito
Sano Hospital, Kobe, Japan.
Many clinical studies on narrow-band imaging (NBI) magnifying endoscopy classifications advocated so far in Japan (Sano, Hiroshima, Showa, and Jikei classifications) have reported the usefulness of NBI 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 problems, 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 four categories of vessel and surface pattern (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 intramucosal neoplasia, high-grade intramucosal neoplasia/shallow submucosal invasive cancer, and deep submucosal invasive cancer, respectively.
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