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Validation study for development of the Japan NBI Expert Team classification of colorectal lesions.
- Source :
-
Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society [Dig Endosc] 2018 Sep; Vol. 30 (5), pp. 642-651. Date of Electronic Publication: 2018 Jun 26. - Publication Year :
- 2018
-
Abstract
- Background and Aim: The Japan narrow-band imaging (NBI) Expert Team (JNET) was organized to unify four previous magnifying NBI classifications (the Sano, Hiroshima, Showa, and Jikei classifications). The JNET working group created criteria (referred to as the NBI scale) for evaluation of vessel pattern (VP) and surface pattern (SP). We conducted a multicenter validation study of the NBI scale to develop the JNET classification of colorectal lesions.<br />Methods: Twenty-five expert JNET colonoscopists read 100 still NBI images with and without magnification on the web to evaluate the NBI findings and necessity of the each criterion for the final diagnosis.<br />Results: Surface pattern in magnifying NBI images was necessary for diagnosis of polyps in more than 60% of cases, whereas VP was required in around 90%. Univariate/multivariate analysis of candidate findings in the NBI scale identified three for type 2B (variable caliber of vessels, irregular distribution of vessels, and irregular or obscure surface pattern), and three for type 3 (loose vessel area, interruption of thick vessel, and amorphous areas of surface pattern). Evaluation of the diagnostic performance for these three findings in combination showed that the sensitivity for types 2B and 3 was highest (44.9% and 54.7%, respectively), and that the specificity for type 3 was acceptable (97.4%) when any one of the three findings was evident. We found that the macroscopic type (polypoid or non-polypoid) had a minor influence on the key diagnostic performance for types 2B and 3.<br />Conclusion: Based on the present data, we reached a consensus for developing the JNET classification.<br /> (© 2018 Japan Gastroenterological Endoscopy Society.)
- Subjects :
- Colonic Polyps diagnosis
Humans
Intestinal Mucosa blood supply
Japan
Prospective Studies
Radiographic Magnification standards
Random Allocation
Registries
Sensitivity and Specificity
Colonic Polyps classification
Colonic Polyps diagnostic imaging
Colonoscopy standards
Intestinal Mucosa diagnostic imaging
Intestinal Mucosa pathology
Narrow Band Imaging standards
Subjects
Details
- Language :
- English
- ISSN :
- 1443-1661
- Volume :
- 30
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society
- Publication Type :
- Academic Journal
- Accession number :
- 29603399
- Full Text :
- https://doi.org/10.1111/den.13065