title: Narrow-band imaging (NBI) magnifying endoscopic classification of colorectal tumors proposed by the Japan NBI Expert Team.
abstract: 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.
authors.affiliation: Sano Hospital, Kobe, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Sano
authors.affiliation: Hiroshima University, Hiroshima, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Tanaka
authors.affiliation: Showa University, Northern Yokohama Hospital, Yokohama, Japan.
authors.forename: Shin-Ei
authors.initials: SE
authors.lastname: Kudo
authors.affiliation: The Jikei University School of Medicine, Tokyo, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Saito
authors.affiliation: National Cancer Center Hospital, Tokyo, Japan.
authors.forename: Takahisa
authors.initials: T
authors.lastname: Matsuda
authors.affiliation: Wada Clinic, Wakayama, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Wada
authors.affiliation: Takahiro Fujii Clinic, Tokyo, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Fujii
authors.affiliation: National Cancer Center Hospital East, Kashiwa, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Ikematsu
authors.affiliation: National Hospital Organization Tokyo Medical Center, Tokyo, Japan.
authors.forename: Toshio
authors.initials: T
authors.lastname: Uraoka
authors.affiliation: Tochigi Cancer Center, Utsunomiya, Japan.
authors.forename: Nozomu
authors.initials: N
authors.lastname: Kobayashi
authors.affiliation: Akasaka Endoscopic Clinic, Tokyo, Japan.
authors.forename: Hisashi
authors.initials: H
authors.lastname: Nakamura
authors.affiliation: Shizuoka Cancer Center, Shizuoka, Japan.
authors.forename: Kinichi
authors.initials: K
authors.lastname: Hotta
authors.affiliation: Kyoto University, Kyoto, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Horimatsu
authors.affiliation: Juntendo University, Tokyo, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Sakamoto
authors.affiliation: The First Hospital of China Medical University, Shenyang, China.
authors.forename: Kuang-I
authors.initials: KI
authors.lastname: Fu
authors.affiliation: Kurume University, Kurume, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Tsuruta
authors.affiliation: St. Mary's Hospital, Kurume, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawano
authors.affiliation: Kinki University, Osaka-Sayama, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kashida
authors.affiliation: Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
authors.forename: Yoji
authors.initials: Y
authors.lastname: Takeuchi
authors.affiliation: Machida Gastrointestinal Hospital, Osaka, Japan.
authors.forename: Hirohisa
authors.initials: H
authors.lastname: Machida
authors.affiliation: Kyoto Katsura Hospital, Kyoto, Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Kusaka
authors.affiliation: Kyoto Prefectural University of Medicine, Kyoto, Japan.
authors.forename: Naohisa
authors.initials: N
authors.lastname: Yoshida
authors.affiliation: Fujita Health University, Toyoake, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Hirata
authors.affiliation: Terai Clinic, Tokyo, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Terai
authors.affiliation: Japanese Red Cross Akita Hospital, Akita, Japan.
authors.forename: Hiro-O
authors.initials: HO
authors.lastname: Yamano
authors.affiliation: National Cancer Center Hospital East, Kashiwa, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Kaneko
authors.affiliation: National Cancer Center Hospital, Tokyo, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nakajima
authors.affiliation: National Cancer Center Hospital, Tokyo, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Sakamoto
authors.affiliation: Tokura Yamaguchi Clinic, Mishima, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Yamaguchi
authors.affiliation: The Jikei University School of Medicine, Tokyo, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Tamai
authors.affiliation: Fujita Health University, Toyoake, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Nakano
authors.affiliation: Hiroshima University, Hiroshima, Japan.
authors.forename: Nana
authors.initials: N
authors.lastname: Hayashi
authors.affiliation: Hiroshima University, Hiroshima, Japan.
authors.forename: Shiro
authors.initials: S
authors.lastname: Oka
authors.affiliation: Sano Hospital, Kobe, Japan.
authors.forename: Mineo
authors.initials: M
authors.lastname: Iwatate
authors.affiliation: Kyoto Prefectural University of Medicine, Kyoto, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Ishikawa
authors.affiliation: Toho University, Tokyo, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Murakami
authors.affiliation: Aomori Prefectural Central Hospital, Aomori, Japan.
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Yoshida
authors.affiliation: National Cancer Center Hospital, Tokyo, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Saito
mesh_terms: D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D062048:Narrow Band Imaging
keywords: classification; colorectal neoplasms; magnifying endoscopy; narrow band imaging; the Japan NBI expert team (JNET)