Jeongmin Choi1, Sang Gyun Kim, Jong Pil Im, Joo Sung Kim, Hyun Chae Jung. 1. Division of Gastroenterology, Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, 28 Yeongeon-dong, Jongno-gu, Seoul, 110-744, South Korea.
Abstract
BACKGROUND: Although the accurate estimation of tumor size is essential for proper patient selection for endoscopic resection in early gastric cancer (EGC), no study has been conducted to date on tumor size estimation. We aimed to evaluate the accuracy of endoscopic visual estimation of tumor size of EGC. METHODS: In 508 EGC patients that underwent endoscopic resection, endoscopic visual estimations were performed retrospectively by independent two endoscopists using still images. Data were compared with pathologic measurements as gold standard. Inter-observer agreement was determined using the Bland-Altman method and intra-class correlation coefficients (ICC). Measurement discrepancies were presented as differences between measurements. RESULTS: The ICC between the two endoscopists was 0.915 (95 % CI 0.900-0.928). Mean endoscopic estimates for both endoscopists were significantly lower than mean pathologic measurements (1.50 and 1.67 vs. 1.80 cm, P < 0.001). Absolute differences between average endoscopic estimates and pathologic measurements were found to be acceptable in most cases: an absolute difference of <0.4 cm was found for 80 % (404/508) of cases. Bland-Altman plot showed that 94 % of cases lay within the 95 % limits of agreement. Measurement discrepancy was proportional to tumor size and increased for an undifferentiated histology. CONCLUSIONS: Endoscopic visual estimations were found to show reliable agreement with pathologic measurement in EGC patients undergoing endoscopic resection, together with good inter-observer agreement. Further prospective study is needed to confirm the validity of this method.
BACKGROUND: Although the accurate estimation of tumor size is essential for proper patient selection for endoscopic resection in early gastric cancer (EGC), no study has been conducted to date on tumor size estimation. We aimed to evaluate the accuracy of endoscopic visual estimation of tumor size of EGC. METHODS: In 508 EGCpatients that underwent endoscopic resection, endoscopic visual estimations were performed retrospectively by independent two endoscopists using still images. Data were compared with pathologic measurements as gold standard. Inter-observer agreement was determined using the Bland-Altman method and intra-class correlation coefficients (ICC). Measurement discrepancies were presented as differences between measurements. RESULTS: The ICC between the two endoscopists was 0.915 (95 % CI 0.900-0.928). Mean endoscopic estimates for both endoscopists were significantly lower than mean pathologic measurements (1.50 and 1.67 vs. 1.80 cm, P < 0.001). Absolute differences between average endoscopic estimates and pathologic measurements were found to be acceptable in most cases: an absolute difference of <0.4 cm was found for 80 % (404/508) of cases. Bland-Altman plot showed that 94 % of cases lay within the 95 % limits of agreement. Measurement discrepancy was proportional to tumor size and increased for an undifferentiated histology. CONCLUSIONS: Endoscopic visual estimations were found to show reliable agreement with pathologic measurement in EGCpatients undergoing endoscopic resection, together with good inter-observer agreement. Further prospective study is needed to confirm the validity of this method.
Authors: N Gopalswamy; V N Shenoy; U Choudhry; R J Markert; N Peace; M S Bhutani; C J Barde Journal: Gastrointest Endosc Date: 1997-12 Impact factor: 9.427
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Authors: Joon Mee Kim; Jin Hee Sohn; Mee-Yon Cho; Woo Ho Kim; Hee Kyung Chang; Eun Sun Jung; Myeong-Cherl Kook; So-Young Jin; Yang Seok Chae; Young Soo Park; Mi Seon Kang; Hyunki Kim; Jae Hyuk Lee; Do Youn Park; Kyoung Mee Kim; Hoguen Kim; Youn Wha Kim; Seung-Sik Hwang; Sang Yong Seol; Hwoon-Yong Jung; Na Rae Lee; Seung-Hee Park; Ji Hye You Journal: Gastric Cancer Date: 2015-11-30 Impact factor: 7.370