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International Session (Panel Discussion)1 (JGES・JSGE・JSGS)
Sat. October 14th   9:00 - 11:20   Room 11: Fukuoka International Congress Center 502+503
The Japan Esophageal Society classification system for the diagnosis of Barrett's esophageal lesions using magnifying endoscopy
R. Ishihara1, K. Goda2, T. Oyama3
1Department of Gastrointestinal Oncology, Osaka International Cancer Institute, 2Digestive Disease Center, Showa University Koto Toyosu Hospital, 3Department of Endoscopy, Saku Central Hospital Advanced Care Center
A new classification (Japan Esophageal Society [JES] classification) for the diagnosis of Barrett's esophagus (BE) -related lesions by magnifying endoscopy was developed. In this classification, diagnosis of dysplastic lesion is made by the irregularity of surface and vascular patterns. A multicenter study was conducted to confirm the validity of the classification. We collected 156 images (67 non-dysplastic and 89 dysplastic BE) taken by NBI with high-definition magnifying endoscopy. Ten endoscopists (five experts and five non-experts) were recruited from 10 hospital as reviewers and were given a lecture on the JES classification. Then, they reviewed the images twice, immediately after the lecture (1st test) and 6 weeks after (2nd test). Sensitivity, specificity, and overall accuracy of the JES classification system in the diagnosis of dysplastic BE were 87%, 98%, and 91% for experts and 87%, 97%, and 91% for non-experts, respectively. Inter-observer agreement was substantial among the experts (κ = 0.75) and non-experts (κ = 0.79) on the 1st test. Intra-observer agreement of experts and non-experts between the 1st and 2nd tests were almost perfect (κ = 0.83 and 0.83, respectively). Our results suggest that the JES classification may provide high accuracy and reproducibility in the diagnosis of BE-related superficial neoplasms.
Index Term 1: Esophageal cancer
Index Term 2: Magnifying endoscopy
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