Screening for Superficial Colorectal Tumor Using Narrow Band Imaging Takahiro Fujii 1 1TF Clinic, Tokyo Keyword: NBI , 表面陥凹型腫瘍 , O-ring sign , chromoendoscopy pp.1210-1214
Published Date 2017/8/25
DOI https://doi.org/10.11477/mf.1403201155
  • Abstract
  • Look Inside
  • Reference
  • Cited by

 Screening for superficial colorectal tumors has evolved over time with advances in endoscopic technology ; conventional WLI(white-light imaging)is being increasingly replaced with IEE(image-enhanced endoscopy)with NBI(narrow-band imaging)as the mainstay for screening. Of note, a comparison between WLI and NBI has shown the superiority of NBI over WLI in detecting non-granular type(LST-NG)tumors. Depressed and reactive elevated areas of depressed tumors are visualized as whitish and brownish areas, respectively, on performing NBI, which together constitute the so-called“O-ring sign”that is characteristic of the NBI findings of depressed tumors. Prospective screening for cecal diminutive adenomas alone sequentially with WLI, NBI, and chromoendoscopy(indigo carmine dye spraying)has shown that cecal diminutive adenomas are most frequently detected with chromoendoscopy, followed by NBI and WLI(47, 37, and 11 lesions, respectively), suggesting the usefulness of chromoendoscopy. Thus, while NBI appears to represent the mainstay for pan-colonic screening at present, further refinements in IEE are required to improve chromoendoscopy in pan-colonic screening.

Copyright © 2017, Igaku-Shoin Ltd. All rights reserved.


電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院