title: Brief education on microvasculature and pit pattern for trainees significantly improves estimation of the invasion depth of colorectal tumors.
abstract: Objectives. This study was performed to evaluate the effectiveness of education for trainees on the gross findings identified by conventional white-light endoscopy (CWE), the microvascular patterns identified by magnifying narrow-band imaging endoscopy (MNE), and the pit patterns identified by magnifying chromoendoscopy (MCE) in estimation of the invasion depth of colorectal tumors. Methods. A total of 420 endoscopic images of 35 colorectal tumors were used. Five trainees estimated the invasion depth of the tumors by reviewing the CWE images before education. Afterwards, the trainees estimated the invasion depth of the same tumors after brief education on CWE, MNE and MCE images, respectively. Results. The initial diagnostic accuracy for deep submucosal invasion before education and after education on CWE, MNE, and MCE findings was 54.3%, 55.4%, 67.4%, and 76.6%, respectively. The diagnostic accuracy increased significantly after MNE education (P = 0.028). The specificity for deep submucosal invasion before education and after education on CWE, MNE, and MCE findings was 47.9%, 45.7%, 65.0%, and 80.7%, respectively. The specificity increased significantly after MNE (P = 0.002) and MCE (P = 0.005) education. Conclusion. Brief education on microvascular pattern identification by MNE and pit pattern identification by MCE significantly improves trainees' estimations of the invasion depth of colorectal tumors.
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Joon Sung
authors: 0000-0001-9158-1012
authors: JS
authors: Kim
authors: Division of Gastroenterology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, Republic of Korea.
authors: Bo-In
authors: 0000-0002-0218-4136
authors: BI
authors: Lee
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Hwang
authors: H
authors: Choi
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Bong Koo
authors: BK
authors: Kang
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Jong In
authors: JI
authors: Kim
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Hae Mi
authors: HM
authors: Lee
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Eun-Joo
authors: EJ
authors: Im
authors: Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, 665 Bupyeong-dong, Bupyeong-gu, Incheon 403-720, Republic of Korea.
authors: Byung-Wook
authors: BW
authors: Kim
authors: Division of Gastroenterology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, Republic of Korea.
authors: Sang-Woo
authors: SW
authors: Kim
authors: Division of Gastroenterology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, Republic of Korea.
authors: Myung-Gyu
authors: 0000-0003-4083-5187
authors: MG
authors: Choi
authors: Division of Gastroenterology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, Republic of Korea.
authors: Kyu Yong
authors: KY
authors: Choi