Clinical Endoscopy

The Korean Society of Gastrointestinal Endoscopy (대한소화기내시경학회)
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Utility of narrow-band imaging with or without dual focus magnification in neoplastic prediction of small colorectal polyps: a Vietnamese experience

  • Tien Manh Huynh (Department of Internal Medicine, University of Medicine and Pharmacy at Hochiminh City, Ho Chi Minh University) ;
  • Quang Dinh Le (Department of Internal Medicine, University of Medicine and Pharmacy at Hochiminh City, Ho Chi Minh University) ;
  • Nhan Quang Le (Department of Internal Medicine, University of Medicine and Pharmacy at Hochiminh City, Ho Chi Minh University) ;
  • Huy Minh Le (Department of Endoscopy, University Medical Center at Hochiminh City) ;
  • Duc Trong Quach (Department of Internal Medicine, University of Medicine and Pharmacy at Hochiminh City, Ho Chi Minh University)
  • Received : 2022.08.18
  • Accepted : 2022.12.04
  • Published : 2023.07.30
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Abstract

Background/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). Methods: 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. Results: 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). Conclusions: NBI improved the real-time neoplastic prediction of small colorectal polyps. The DF mode was especially useful in polyps ≤5 mm in size.

Keywords

Acknowledgement

The authors would like to thank the staff at UMC Hospital for approving this study and for their assistance in the data collection, as well as all patients who participated in this study. All authors contributed to the interpretation of the data, and critically reviewed and approved the manuscript.

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