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Diagnostic Ability of Staging in Early Colorectal Cancer: Comparison with Magnifying Colono-scopy and Endoscopic Ultrasonography Takahiro Fujii 1 1Department of Endoscopy, National Cancer Center Hospital Keyword: 拡大内視鏡 , 超音波内視鏡 , 深達度診断 , pit pattern pp.817-827
Published Date 2001/5/25
DOI https://doi.org/10.11477/mf.1403103237
  • Abstract
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 There is good correspondence between Kudo's classification of the mucosal crypt pattern and histological findings, using magnifying colonoscopy (Type Ⅰ and Ⅱ are non-neoplastic lesions, type Ⅲ or Ⅳ are intramucosal neoplastic lesions, and type Ⅴ are deep invasive carcinomas, respectively). Kudo's classification was modified into three basic types ; non-neoplastic, non-invasive and invasive. The accuracy rates of invasiondepth diagnoses of early colorectal cancer by magnifying colonoscopy and endoscopic ultrasonography (EUS) were compared. There were 123 lesions (protruding lesions, 75, superficial lesions, 48), on which both EUS and magnifying colonoscopy were performed. The accuracy rate was higher for magnifying colonoscopy (89%; 110/ 123) than for EUS (79%; 97/ 123). Moreover, the performance of EUS is time consuming and a little troublesome. And protruding tumors or large colorectal cancers are difficult to evaluate with EUS due to its low degree of penetration. On the other hand, magnifying colonoscopy is more expeditious and costeffective, and detection and adequate examination of tumors tended to be more effective with magnifying colonoscopy than with EUS. In conclusion, magnifying colonoscopy is a better instrument than EUS for diagnosis of the depth of invasion of early colorectal cancer.


Copyright © 2001, Igaku-Shoin Ltd. All rights reserved.

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

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