Differential Diagnosis of Colorectal Polyps with Narrow Band Imaging Colonoscopy without Magnification.
10.4166/kjg.2014.63.5.276
- Author:
Bong Jin KIM
1
;
Moo In PARK
;
Seun Ja PARK
;
Won MOON
;
Eun Taek PARK
;
Sung Eun KIM
;
Chang Sup LIM
;
Jae Hoon YOO
;
Seong Joo KANG
Author Information
1. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea. mipark@kosinmed.or.kr
- Publication Type:Original Article
- Keywords:
Colonic polyps;
Narrow band imaging;
Pit pattern;
Intraclass correlation coefficient;
Diagnostic accuracy
- MeSH:
Adenoma/diagnosis;
Adult;
Aged;
Aged, 80 and over;
Carcinoma/diagnosis;
Colonic Neoplasms/*diagnosis/pathology;
Colonic Polyps/*pathology;
Colonoscopy;
Diagnosis, Differential;
Female;
Humans;
Male;
Middle Aged;
Narrow Band Imaging;
Retrospective Studies
- From:The Korean Journal of Gastroenterology
2014;63(5):276-282
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND/AIMS: Narrow band imaging (NBI) endoscopy can be used for gross differentiation between the types of colonic polyps. This study was conducted as a retrospective study for estimation of the interobserver and intra-observer agreement of the pit pattern of the mucosal surface and the accuracy of histology prediction. METHODS: A total of 159 patients underwent complete colonoscopy and 219 polyps examined by NBI endoscopy without magnification were assessed. Interobserver and intra-observer agreement were calculated by investigators in each group for determination of the surface pattern and prediction of histology based on the modified Kudo's classification using intraclass correlation coefficient. RESULTS: Interobserver agreement for the surface pit pattern and prediction of polyp type was 0.84 and 0.73 in experienced endoscopists, and 0.86 and 0.62 in trainees, respectively. Intra-observer agreement for the surface pit patterns and prediction of polyp type was 0.81, 0.83, 0.85, 0.83, 0.56, 0.84, 0.51, 0.83, and 0.71; and 0.71, 0.70, 0.82, 0.54, 0.72, 0.37, 0.51, 0.34, and 0.30, respectively. The diagnostic accuracy for prediction of polyp type was 69.4% for experienced endoscopists and 72.9% for trainees. CONCLUSIONS: NBI endoscopy without magnification showed fairly good inter and intra-observer agreement for the pit pattern of the mucosal surface and the accuracy of histology prediction; however, it had some limitation for differentiation of colon polyp histologic type. Training and experience with NBI is needed for improvement of accuracy.
