Case Report
Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Endosc. Sep 16, 2020; 12(9): 304-309
Published online Sep 16, 2020. doi: 10.4253/wjge.v12.i9.304
Small invasive colon cancer with adenoma observed by endocytoscopy: A case report
Yoshika Akimoto, Shin-ei Kudo, Katsuro Ichimasa, Yuta Kouyama, Masashi Misawa, Tomokazu Hisayuki, Toyoki Kudo, Tetsuo Nemoto
Yoshika Akimoto, Shin-ei Kudo, Katsuro Ichimasa, Yuta Kouyama, Masashi Misawa, Tomokazu Hisayuki, Toyoki Kudo, Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama 224-8503, Japan
Tetsuo Nemoto, Department of Pathology, Showa University Northern Yokohama Hospital, Yokohama 224-8503, Japan
Author contributions: Akimoto Y, Kudo S and Ichimasa K contributed to concept and design, literature review, drafting of the manuscript; Kouyama Y, Misawa M, Hisayuki T, Kudo T and Nemoto T acquired the data and figures and revised the manuscript; all authors had access and approved the last version of the manuscript.
Informed consent statement: Informed consent was obtained from the patient.
Conflict-of-interest statement: All authors declare no conflict of interest.
CARE Checklist (2016) statement: The authors have read the CARE 2016 Checklist, and the manuscript was prepared and revised according to the CARE 2016 Checklist.
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: http://creativecommons.org/licenses/by-nc/4.0/
Corresponding author: Katsuro Ichimasa, MD, PhD, Assistant Professor, Digestive Disease Center, Showa University Northern Yokohama Hospital, 35-1 Chigasaki-chuo, Tsuzuki-ku, Yokohama 224-8503, Japan. ichitommy14@yahoo.co.jp
Received: May 27, 2020
Peer-review started: May 27, 2020
First decision: July 4, 2020
Revised: July 16, 2020
Accepted: August 24, 2020
Article in press: August 24, 2020
Published online: September 16, 2020
Processing time: 106 Days and 0.1 Hours
Core Tip

Core Tip: Endocytoscopy is a next-generation endoscopic system. Endocytoscopic observation suggested that a 12 mm reddish polyp, including a depression and a flat area in the sigmoid colon was T1 cancer (depression) with adenoma (flat area). We could perform an optical diagnosis of the lesion by using endocytoscopy before treatment.