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Duc Trong Quach 3 Articles
Utility of narrow-band imaging with or without dual focus magnification in neoplastic prediction of small colorectal polyps: a Vietnamese experience
Tien Manh Huynh, Quang Dinh Le, Nhan Quang Le, Huy Minh Le, Duc Trong Quach
Clin Endosc 2023;56(4):479-489.   Published online May 24, 2023
Graphical AbstractGraphical Abstract AbstractAbstract PDFSupplementary MaterialPubReaderePub
/Aims: Accurate neoplastic prediction can significantly decrease costs associated with pathology and unnecessary colorectal polypectomies. Narrow band imaging (NBI) and dual-focus (DF) mode are promising emerging optical technologies for recognizing neoplastic features of colorectal polyps digitally. This study aimed to clarify the clinical usefulness of NBI with and without DF assistance in the neoplastic prediction of small colorectal polyps (<10 mm).
This cross-sectional study included 530 small colorectal polyps from 343 consecutive patients who underwent colonoscopy at the University Medical Center from September 2020 to May 2021. Each polyp was endoscopically diagnosed in three successive steps using white-light endoscopy (WLE), NBI, and NBI-DF and retrieved for histopathological assessment. The diagnostic accuracy of each modality was evaluated with reference to histopathology.
There were 295 neoplastic polyps and 235 non-neoplastic polyps. The overall accuracies of WLE, WLE+NBI, and WLE+NBI+NBI-DF in the neoplastic prediction of colorectal polyps were 70.8%, 87.4%, and 90.8%, respectively (p<0.001). The accuracy of WLE+NBI+NBI-DF was significantly higher than that of WLE+NBI in the polyp size ≤5 mm subgroup (87.3% vs. 90.1%, p<0.001).
NBI improved the real-time neoplastic prediction of small colorectal polyps. The DF mode was especially useful in polyps ≤5 mm in size.


Citations to this article as recorded by  
  • Effectiveness of Dual-Focus Magnification on Confidence Levels in Optical Diagnosis of Small Colorectal Polyps
    Tien M Huynh, Quang D Le, Nhan Q Le , Huy M Le , Duc T Quach
    Cureus.2024;[Epub]     CrossRef
  • Implementing narrow banding imaging with dual focus magnification for histological prediction of small rectosigmoid polyps in Vietnamese setting
    Tien Manh Huynh, Quang Dinh Le, Nhan Quang Le, Huy Minh Le, Duc Trong Quach
    JGH Open.2024;[Epub]     CrossRef
  • The role of narrow-band imaging with or without dual focus in the detection of polyps smaller than 10 mm, especially diminutive polyps
    Jin Hwa Park
    Clinical Endoscopy.2023; 56(4): 455.     CrossRef
  • Strategy for post-polypectomy colonoscopy surveillance: focus on the revised Korean guidelines
    Yong Soo Kwon, Su Young Kim
    Journal of the Korean Medical Association.2023; 66(11): 652.     CrossRef
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  • 90 Download
  • 4 Web of Science
  • 4 Crossref
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Assessment of Endoscopic Gastric Atrophy according to the Kimura-Takemoto Classification and Its Potential Application in Daily Practice
Duc Trong Quach, Toru Hiyama
Clin Endosc 2019;52(4):321-327.   Published online July 22, 2019
AbstractAbstract PDFPubReaderePub
The assessment of endoscopic gastric atrophy (EGA) according to the Kimura-Takemoto classification has been reported to correlate well with histological assessment. Although agreement among beginner endoscopists was less than that among experienced endoscopists, it has been shown that agreement level could markedly improve and remained stable after proper training. Several cohort studies have consistently shown that the severity of EGA at baseline is significantly associated with the presence of advanced precancerous gastric lesions and gastric cancer, as well as the development of gastric cancer in future. Patients with moderate-to-severe EGA still have high risk of gastric cancer even after successful Helicobacter pylori eradication and should be candidates for gastric cancer surveillance. The assessment of EGA, therefore, could be used as a preliminary tool to identify individuals at high risk for gastric cancer. In this paper, we review the agreement on mucosal atrophy assessment between the Kimura-Takemoto classification and histology as well as the potential application of this endoscopic classification to identify precancerous gastric lesions and gastric cancer in daily practice.


Citations to this article as recorded by  
  • Endoscopic diagnosis and prevalence of early gastric cancer in India: A prospective study
    Ashutosh Mohapatra, Sonmoon Mohapatra, Shruti Mahawar, Krushna Chandra Pani, Nachiketa Mohapatra, Mohan Ramchandani, Nageshwar Reddy, Mahesh K. Goenka, Noriya Uedo
    DEN Open.2024;[Epub]     CrossRef
  • Clinical and morphological characteristics of patients with chronic gastritis and high risk of gastric cancer
    A. S. Tertychnyy, D. D. Protsenko, N. V. Pachuashvili, D. P. Nagornaya, P. V. Pavlov, A. P. Kiruhin, A. A. Fedorenko
    Experimental and Clinical Gastroenterology.2024; (9): 107.     CrossRef
  • Comparison between the GastroPanel test and the serum pepsinogen assay interpreted with the ABC method—A prospective study
    Sun‐Young Lee, Yeon‐Sun Ahn, Hee‐Won Moon
    Helicobacter.2024;[Epub]     CrossRef
  • The value of LCI-based modified Kyoto classification risk scoring system in predicting the risk of early gastric cancer
    Chao Gao, Guanpo Zhang, Jin Zheng, Yunmeng Zheng, Wulian Lin, Guilin Xu, Yixiang You, Dazhou Li, Wen Wang
    Scandinavian Journal of Gastroenterology.2024; 59(7): 859.     CrossRef
  • Identification of serum microRNAs as potential diagnostic biomarkers for detecting precancerous lesions of gastric cancer
    Hajime Otsu, Sho Nambara, Qingjiang Hu, Yuichi Hisamatsu, Takeo Toshima, Kazuki Takeishi, Yusuke Yonemura, Takaaki Masuda, Eiji Oki, Koshi Mimori
    Annals of Gastroenterological Surgery.2023; 7(1): 63.     CrossRef
  • Evolution of the Correa's cascade steps: A long-term endoscopic surveillance among non-ulcer dyspepsia and gastric ulcer after H. pylori eradication
    Hsiu-Chi Cheng, Yao-Jong Yang, Hsiao-Bai Yang, Yu-Ching Tsai, Wei-Lun Chang, Chung-Tai Wu, Hsin-Yu Kuo, Yu-Ting Yu, Er-Hsiang Yang, Wei-Chun Cheng, Wei-Ying Chen, Bor-Shyang Sheu
    Journal of the Formosan Medical Association.2023; 122(5): 400.     CrossRef
  • Vietnam Association of Gastroenterology (VNAGE) consensus on the management of Helicobacter pylori infection
    Duc Trong Quach, Bang Hong Mai, Mien Kieu Tran, Long Van Dao, Huy Van Tran, Khanh Truong Vu, Khien Van Vu, Ho Thi-Thu Pham, Hoang Huu Bui, Dung Dang-Quy Ho, Dung Tuan Trinh, Vinh Thuy Nguyen, Thai Hong Duong, Tuong Thi-Khanh Tran, Ha Thi-Viet Nguyen, Thin
    Frontiers in Medicine.2023;[Epub]     CrossRef
  • Endoscopic Screening for Missed Lesions of Synchronous Multiple Early Gastric Cancer during Endoscopic Submucosal Dissection
    Jiangnan Wan, Yi Fang, Haizhong Jiang, Bujiang Wang, Lei Xu, Chunjiu Hu, Honghui Chen, Xiaoyun Ding, Tatsuya Toyokawa
    Gastroenterology Research and Practice.2023; 2023: 1.     CrossRef
  • Morphometric features of gastric mucosa in atrophic gastritis: A different pattern between corpus and antrum
    Xue-Mei Lin, Li Wang, Chun-Hui Xi, Jun Wang, Xian-Fei Wang, Qiong Wang, Cong Yuan
    Medicine.2023; 102(14): e33480.     CrossRef
  • Predicting reflux symptom recurrence: The impact of gastroesophageal junction indicators and body mass index among outpatients
    Qing Wang, Junhui Lu, Yue Sui, Jing Fan, Jinnan Ren, Zhenzhen Wang, Xing Chen
    Experimental and Therapeutic Medicine.2023;[Epub]     CrossRef
  • Helicobacter pylori intragastric colonization and migration: Endoscopic manifestations and potential mechanisms
    Tong Mu, Zhi-Ming Lu, Wen-Wen Wang, Hua Feng, Yan Jin, Qian Ding, Li-Fen Wang
    World Journal of Gastroenterology.2023; 29(30): 4616.     CrossRef
  • Factors associated with heterochronic gastric cancer development post-endoscopic mucosal dissection in early gastric cancer patients
    Bing Xie, Yun Xia, Xia Wang, Yan Xiong, Shao-Bo Chen, Jie Zhang, Wei-Wei He
    World Journal of Gastrointestinal Oncology.2023; 15(9): 1644.     CrossRef
  • Kimura–Takemoto Classification: A Tool to Predict Gastric Intestinal Metaplasia Progression to Advanced Gastric Neoplasia
    Leyla Maric, Daniel Castaneda, Harjinder Singh, Pablo Bejarano, Brenda Jimenez Cantisano, Fernando J. Castro
    Digestive Diseases and Sciences.2022; 67(8): 4092.     CrossRef
  • Consistency between the endoscopic Kyoto classification and pathological updated Sydney system for gastritis: A cross‐sectional study
    Osamu Toyoshima, Toshihiro Nishizawa, Shuntaro Yoshida, Tatsuya Matsuno, Nariaki Odawara, Akira Toyoshima, Kosuke Sakitani, Hidenobu Watanabe, Mitsuhiro Fujishiro, Hidekazu Suzuki
    Journal of Gastroenterology and Hepatology.2022; 37(2): 291.     CrossRef
  • Diagnostic Accuracy of H. pylori Status by Conventional Endoscopy: Time-Trend Change After Eradication and Impact of Endoscopic Image Quality
    Duc Trong Quach, Rika Aoki, Akiko Iga, Quang Dinh Le, Toru Kawamura, Ken Yamashita, Shinji Tanaka, Masaharu Yoshihara, Toru Hiyama
    Frontiers in Medicine.2022;[Epub]     CrossRef
  • Relevance of pepsinogen, gastrin, and endoscopic atrophy in the diagnosis of autoimmune gastritis
    Hiroshi Kishikawa, Kenji Nakamura, Keisuke Ojiro, Tadashi Katayama, Kyoko Arahata, Sakiko Takarabe, Aya Sasaki, Soichiro Miura, Yukie Hayashi, Hitomi Hoshi, Takanori Kanai, Jiro Nishida
    Scientific Reports.2022;[Epub]     CrossRef
  • Tauroursodeoxycholic Acid Inhibits Nuclear Factor Kappa B Signaling in Gastric Epithelial Cells and Ameliorates Gastric Mucosal Damage in Mice
    Su Hwan Kim, Ji Won Kim, Seong-Joon Koh, Sang Gyun Kim, Jeong Mo Bae, Jung Ho Kim, Jeong Hwan Park, Mee Soo Chang, Kee Don Choi, Hyoun Woo Kang, Byeong Gwan Kim, Kook Lae Lee
    The Korean Journal of Gastroenterology.2022; 79(4): 161.     CrossRef
  • Serum pepsinogen: A potential non-invasive screening method for moderate and severe atrophic gastritis among an asian population
    Cong Long Nguyen, Tran Tien Dao, Thi-Thuy Ngan Phi, The Phuong Nguyen, Van Tuyen Pham, Truong Khanh Vu
    Annals of Medicine and Surgery.2022; 78: 103844.     CrossRef
  • Risk factors for early gastric cancer: focus on Helicobacter pylori gastritis
    Hee Seok Moon
    Journal of the Korean Medical Association.2022; 65(5): 259.     CrossRef
  • Current status of the gastric cancer screening program in Korea
    Young-Il Kim, Il Ju Choi
    Journal of the Korean Medical Association.2022; 65(5): 250.     CrossRef
  • Endoscopic diagnosis of early gastric cancer
    Dong Chan Joo, Gwang Ha Kim
    Journal of the Korean Medical Association.2022; 65(5): 267.     CrossRef
  • Current Evidence for a Paradigm Shift in Gastric Cancer Prevention From Endoscopic Screening toHelicobacter pyloriEradication in Korea
    Young-Il Kim, Il Ju Choi
    Journal of Gastric Cancer.2022; 22(3): 169.     CrossRef
  • Need for improvement in the evaluation of pre‐malignant upper gastro‐intestinal lesions in India: Results of a nationwide survey
    Deepak Madhu, Veeraraghavan Krishnamurthy, Thirumoorthi Natarajan, Sundeep Lakhtakia
    Journal of Gastroenterology and Hepatology.2022; 37(11): 2113.     CrossRef
  • Usefulness of the Kyoto Classification Score for Prediction of Current Helicobacter pylori Infection
    Heejun Kang, Chul-Hyun Lim, Sukil Kim, Arum Choi, Jung-Hwan Oh
    The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2022; 22(4): 281.     CrossRef
  • The simplified Kyoto classification score is consistent with the ABC method of classification as a grading system for endoscopic gastritis
    Toshihiro Nishizawa, Osamu Toyoshima, Ryo Kondo, Kazuma Sekiba, Yosuke Tsuji, Hirotoshi Ebinuma, Hidekazu Suzuki, Chizu Tanikawa, Koichi Matsuda, Kazuhiko Koike
    Journal of Clinical Biochemistry and Nutrition.2021; 68(1): 101.     CrossRef
  • Endoscopic grading of gastric atrophy on risk assessment of gastric neoplasia: A systematic review and meta‐analysis
    Shiyu Xiao, Yihan Fan, Zhihao Yin, Liya Zhou
    Journal of Gastroenterology and Hepatology.2021; 36(1): 55.     CrossRef
  • Gastritis: The clinico-pathological spectrum
    Massimo Rugge, Edoardo Savarino, Marta Sbaraglia, Ludovica Bricca, Peter Malfertheiner
    Digestive and Liver Disease.2021; 53(10): 1237.     CrossRef
  • Efficacy of Seven-Day Potassium-Competitive Acid Blocker-Based First-LineHelicobacter PyloriEradication Therapy Administered with Bismuth
    Ji Yeon Kim, Sun-Young Lee, Hyobin Kim, Jeong Hwan Kim, In-Kyung Sung, Hyung Seok Park
    Yonsei Medical Journal.2021; 62(8): 708.     CrossRef
  • Second-Line Bismuth-Containing Quadruple Therapy for Helicobacterpylori Infection: A 12-Year Study of Annual Eradication Rates
    Kiwon Shin, Min-Jae Cho, Jung-Hwan Oh, Chul-Hyun Lim
    Journal of Clinical Medicine.2021; 10(15): 3273.     CrossRef
  • Predictive Significance of Promoter DNA Methylation of Cysteine Dioxygenase Type 1 (CDO1) in Metachronous Gastric Cancer
    Yo Kubota, Satoshi Tanabe, Mizutomo Azuma, Kazue Horio, Yoshiki Fujiyama, Takafumi Soeno, Yasuaki Furue, Takuya Wada, Akinori Watanabe, Kenji Ishido, Chikatoshi Katada, Keishi Yamashita, Wasaburo Koizumi, Chika Kusano
    Journal of Gastric Cancer.2021; 21(4): 379.     CrossRef
  • Gastrointestinal Microbiota Changes in Patients With Gastric Precancerous Lesions
    Dehua Liu, Si Chen, Yawen Gou, Wenyong Yu, Hangcheng Zhou, Rutong Zhang, Jinghao Wang, Fei Ye, Yingling Liu, Baolin Sun, Kaiguang Zhang
    Frontiers in Cellular and Infection Microbiology.2021;[Epub]     CrossRef
  • Use of endoscopic assessment of gastric atrophy for gastric cancer risk stratification to reduce the need for gastric mapping
    Duc Trong Quach, Toru Hiyama, Huy Minh Le, Trung Sao Nguyen, Takuji Gotoda
    Scandinavian Journal of Gastroenterology.2020; 55(4): 402.     CrossRef
  • Influence of hypergastrinemia secondary to long-term proton pump inhibitor treatment on ECL cell tumorigenesis in human gastric mucosa
    Atsushi Tatsuguchi, Shintaro Hoshino, Noriyuki Kawami, Katya Gudis, Tsutomu Nomura, Akira Shimizu, Katsuhiko Iwakiri
    Pathology - Research and Practice.2020; 216(10): 153113.     CrossRef
  • Chronic atrophic gastritis detection with a convolutional neural network considering stomach regions
    Misaki Kanai, Ren Togo, Takahiro Ogawa, Miki Haseyama
    World Journal of Gastroenterology.2020; 26(25): 3650.     CrossRef
  • Naiv Helicobacter pylori pozitif ve negatif hastaların klinik, demografik ve endoskopik karakteristikleri: Retrospektif analiz
    Muhammet AYDIN
    Endoskopi Gastrointestinal.2020; 28(2): 39.     CrossRef
  • Gastrointestinal Microbiota Changes in Patients With Gastric Precancerous Lesions
    Dehua Liu, Si Chen, Yawen Gou, Wenyong Yu, Hangcheng Zhou, Rutong Zhang, Jinghao Wang, Fei Ye, Yingling Liu, Baolin Sun, Kaiguang Zhang
    SSRN Electronic Journal .2020;[Epub]     CrossRef
  • 10,907 View
  • 476 Download
  • 34 Web of Science
  • 36 Crossref
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Endoscopic hemostatic powder as a salvage treatment for acute gastrointestinal bleeding
Duc Trong Quach
Received April 29, 2024  Accepted May 28, 2024  Published online June 11, 2024  
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