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International Journal of Colorectal Disease

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01-12-2009 | Original Article

Comparative study of conventional colonoscopy, magnifying chromoendoscopy, and magnifying narrow-band imaging systems in the differential diagnosis of small colonic polyps between trainee and experienced endoscopist

Authors: Chun-Chao Chang, Ching-Ruey Hsieh, Horng-Yuan Lou, Chia-Lang Fang, Cheng Tiong, Jen-Juh Wang, I-Van Wei, Shie-Chiang Wu, Jun-Nan Chen, Yuan-Hung Wang

Published in: International Journal of Colorectal Disease | Issue 12/2009

Abstract

Background

Removal of colorectal neoplastic polyps can reduce the incidence of colorectal cancers. It is important to distinguish neoplastic from nonneoplastic polyps. We compared the ability of a trainee and an experienced endoscopist in distinguishing between neoplastic polyps and nonneoplastic polyps by conventional white-light, magnifying narrow-band imaging (NBI), and magnifying chromoendoscopy.

Materials and methods

One hundred and sixty-three small colorectal polyps from 104 patients were studied. All polyps were diagnosed by trainees and experienced endoscopists using conventional white-light, magnifying NBI, and magnifying chromoendoscopy. The kappa values of interobserver agreement between trainees and experienced endoscopists were evaluated before this study. Sensitivity, specificity, and diagnostic accuracy were assessed by reference to histopathology. The first 50 polyps were diagnosed by the trainee as the first stage and the rest 113 polyps were diagnosed as the second stage.

Results

Magnifying NBI and magnifying chromoendoscopy were significant better than conventional white-light by the experienced endoscopist (diagnostic accuracy: NBI 85.3%, chromoendoscopy 87.7%, conventional view 74.8%). No significant differences were found for the trainee. The kappa values (0.77~0.85) were good for each endoscopic modality for the experienced endoscopist. However, only NBI and chromoendoscopy had acceptable kappa values (0.40~0.48) for the trainee. The trainee improved diagnostic accuracy in the second stage, but not yielded the level of the experienced endoscopist.

Conclusion

Magnifying NBI and magnifying chromoendoscopy had a better interobserver agreement than conventional white-light among trainees and experienced endoscopists. The trainee needs learning time to improve diagnostic ability, even using a new modality such as magnifying NBI.

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Title: Comparative study of conventional colonoscopy, magnifying chromoendoscopy, and magnifying narrow-band imaging systems in the differential diagnosis of small colonic polyps between trainee and experienced endoscopist
Authors: Chun-Chao Chang
Ching-Ruey Hsieh
Horng-Yuan Lou
Chia-Lang Fang
Cheng Tiong
Jen-Juh Wang
I-Van Wei
Shie-Chiang Wu
Jun-Nan Chen
Yuan-Hung Wang
Publication date: 01-12-2009
Publisher: Springer-Verlag
Published in: International Journal of Colorectal Disease / Issue 12/2009
Print ISSN: 0179-1958
Electronic ISSN: 1432-1262
DOI: https://doi.org/10.1007/s00384-009-0760-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Comparative study of conventional colonoscopy, magnifying chromoendoscopy, and magnifying narrow-band imaging systems in the differential diagnosis of small colonic polyps between trainee and experienced endoscopist

Abstract

Background

Materials and methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Materials and methods

Results

Conclusion

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