Case Report
Copyright ©The Author(s) 2017. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Jun 28, 2017; 23(24): 4462-4466
Published online Jun 28, 2017. doi: 10.3748/wjg.v23.i24.4462
Case of pediatric traditional serrated adenoma resected via endoscopic submucosal dissection
Sonoko Kondo, Hirohito Mori, Noriko Nishiyama, Takeo Kondo, Ryuichi Shimono, Hitoshi Okada, Takashi Kusaka
Sonoko Kondo, Takeo Kondo, Hitoshi Okada, Takashi Kusaka, Department of Pediatrics, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan
Hirohito Mori, Noriko Nishiyama, Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan
Ryuichi Shimono, Department of Pediatric Surgery, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan
Author contributions: All authors contributed to the manuscript.
Conflict-of-interest statement: The authors declare no conflicts of interest.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (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:
Correspondence to: Sonoko Kondo, MD, PhD, Department of Pediatrics, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki, Kita, Kagawa 761-0793, Japan.
Telephone: +81-87-8912171 Fax: +81-87-8912172
Received: February 2, 2017
Peer-review started: February 9, 2017
First decision: March 3, 2017
Revised: March 21, 2017
Accepted: May 19, 2017
Article in press: May 19, 2017
Published online: June 28, 2017

Traditional serrated adenoma (TSA) is a type of serrated polyp of the colorectum and is thought to be a precancerous lesion. There are three types of serrated polyps, namely, hyperplastic polyps, sessile serrated adenomas/polyps, and TSAs. TSA is the least common of the three types and accounts for about 5% of serrated polyps. Here we report a pediatric case of TSA that was successfully resected by endoscopic submucosal dissection (ESD). This rare case report describes a pediatric patient with no family history of colonic polyp who was admitted to our hospital with hematochezia. On colonoscopy, we found a polypoid lesion measuring 10 mm in diameter in the lower rectum. We selected ESD as a surgical option for en bloc resection, and histopathological examination revealed TSA. The findings in this case suggest that TSA with precancerous potential can occur in children, and that ESD is useful for treating this lesion.

Keywords: Pediatric colonic polyp, Hematochezia, Colorectal serrated lesions, Traditional serrated adenoma, Endoscopic mucosal resection, Endoscopic submucosal dissection

Core tip: Most pediatric colonic polyps are juvenile polyps, and the prevalence of colorectal serrated lesions in this age group is unknown. This case report describes a rare pediatric traditional serrated adenoma that was removed by en bloc resection via endoscopic submucosal dissection.