| International Session (Workshop) 1 (JGES・JSGE) |
| Sat. November 3rd 9:00 - 12:00 Room 13: Kobe International Conference Center International Conference Room |
| The study on the diagnostic accuracy of JNET classification for colorectal polyps. | |||
| Takeshi Yamamura1, Masanao Nakamura2, Yoshiki Hirooka1 | |||
| 1Department of Endoscopy, Nagoya University Hospital, 2Gastroenterology and Hepatology, Nagoya University | |||
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| 【Background and Aim】The JNET classification was proposed in 2014, but few study on international inter-operator comparison of the usefulness of the JNET classification has been reported. The objective of this study was to evaluate the usefulness of the JNET classification and clarify international differences. 【Objective】A total of 185 colorectal tumor cases were collected at our hospital and associated hospital. These cases were examined by magnifying endoscopy using JNET classification and pathologically evaluated after en bloc resection. 【Methods】Six endoscopists (3 each from Japan and Taiwan) participated in the study. The Japanese endoscopists (Group J) usually make diagnoses using magnifying endoscopy, whereas the Taiwanese endoscopists (Group T) usually make diagnoses without magnifying endoscopy. After attending a lecture to uniform the criteria for the JNET classification, they observed one magnified image per 1 lesion and made diagnoses. 【Results】The diagnostic accuracy rate was 75.3% in Group J and 73.3% in Group T (P=0.45). Inter-observer agreement rates within Groups J and T were 0.705 and 0.803. The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy rate of Type 3 for the diagnosis of deep submucosal invasive carcinoma were 44.4, 98.3, 57.1, 97.2, 95.7% in Group J, on the other hand, 70.0, 94.7, 40.4, 98.4, 93.5% in Group T. Positive predictive value was higher in Group J than T (p<0.05). 【Conclusion】The diagnostic accuracy rate was high and comparable between the 2 groups, but the PPV for Type 3 was different between the 2 groups, suggesting the necessity of getting familiar with differentiation between Type2B and Type3. |
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Index Term 1: colon polyp Index Term 2: magnifying endoscopy |
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