Retrospective Study
Copyright ©The Author(s) 2022. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Jun 28, 2022; 28(24): 2748-2757
Published online Jun 28, 2022. doi: 10.3748/wjg.v28.i24.2748
Brown slits for colorectal adenoma crypts on conventional magnifying endoscopy with narrow band imaging using the X1 system
Osamu Toyoshima, Toshihiro Nishizawa, Shuntaro Yoshida, Hidenobu Watanabe, Nariaki Odawara, Kosuke Sakitani, Toru Arano, Hirotoshi Takiyama, Hideyuki Kobayashi, Hirofumi Kogure, Mitsuhiro Fujishiro
Osamu Toyoshima, Toshihiro Nishizawa, Shuntaro Yoshida, Nariaki Odawara, Kosuke Sakitani, Toru Arano, Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
Toshihiro Nishizawa, Department of Gastroenterology and Hepatology, International University of Health and Welfare, Narita Hospital, Chiba 286-8520, Japan
Hidenobu Watanabe, Department of Pathology, Pathology and Cytology Laboratory Japan, Tokyo 166-0003, Japan
Nariaki Odawara, Hirofumi Kogure, Mitsuhiro Fujishiro, Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
Kosuke Sakitani, Department of Gastroenterology, Sakitani Endoscopy Clinic, Chiba 275-0026, Japan
Toru Arano, Department of Gastroenterology, The Fraternity Memorial Hospital, Tokyo 130-8587, Japan
Hirotoshi Takiyama, Department of Surgical Oncology, The University of Tokyo, Tokyo 113-8655, Japan
Hideyuki Kobayashi, Department of Internal Medicine, Umegaoka Ekimae Clinic, Tokyo 154-0022, Japan
Author contributions: Toyoshima O contributed to the study design, endoscopic diagnosis, writing the article, statistical analysis, and final manuscript approval; Nishizawa T contributed to study design, editing of article, and final manuscript approval; Yoshida S contributed to study design, endoscopic diagnosis, critical review, and final manuscript approval; Watanabe H contributed to study design, histological diagnosis, and final manuscript approval; Odawara N, Sakitani K, Arano T, Takiyama H, Kobayashi H, Kogure H and Fujishiro M contributed to critical review and final manuscript approval.
Institutional review board statement: This study was approved by the Certificated Review Board, Yoyogi Mental Clinic on July 16, 2021 (approval No. RKK227).
Conflict-of-interest statement: All authors have no any conflicts of interest.
Data sharing statement: No additional data are available.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Toshihiro Nishizawa, MD, PhD, Professor, Department of Gastroen-terology and Hepatology, International University of Health and Welfare, Narita Hospital, 852 Hatakeda, Chiba 286-8520, Japan. nisizawa@kf7.so-net.ne.jp
Received: January 16, 2022
Peer-review started: January 16, 2022
First decision: March 8, 2022
Revised: March 14, 2022
Accepted: May 14, 2022
Article in press: May 14, 2022
Published online: June 28, 2022
Processing time: 159 Days and 10.5 Hours
Core Tip

Core Tip: We defined the polyp’s surface structure observed on conventional magnifying endoscopy with non-staining narrow band imaging using the X1 system as brown slits. The brown slits corresponded to slit-like lumens on endocytoscopy and histological crypt openings of an adenoma. Brown slits were useful for diagnosing colorectal adenoma.