Stomach and Intestine(Tokyo) Volume 36, Issue 6 (May 2001)

Usefulness of Endoscopic Ultrasonography (EUS) Compared with Colonoscopy for Diagnosing the Depth of Invasion of Early Colorectal Carcinomas Norihiro Hamamoto 1 , Ichiro Hirata 1 , Hiroshi Morikawa 1 , Shin-ichi Sasaki 1 , Ken-ichi Katsu 1 1The Second Department of Internal Medicine, Osaka Medical College Keyword: 早期大腸癌 , EUS , 深達度診断 , 通常内視鏡 pp.809-815
Published Date 2001/5/25
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 We compared the usefulness of endoscopic ultrasonography (EUS) for diagnosis of early colorectal carci-noma with that of colonoscopy (CS). The subjects consisted of 99 lesions. Evaluation by EUS was possible in 83.8% (83/99). The diagnostic accuracy rate of EUS was higher than that of CS (88.0% vs 80.7%). The diagnostic accuracy rate of EUS for protruding and flat elevated lesions was almost the same as that of CS, but the diagnostic accuracy rate of EUS for depressed lesions was higher than that of CS. 10 out of 15 lesions misdiagnosed by CS were properly diagnosed by EUS. All of the lesions overdiagnosed by CS were flat elevated lesions and all of the lesions underdiagnosed by CS were protruding lesions. As for the accuracy rate, combination of EUS with CS was useful for evaluation and diagnosis of tumor invasion especially in depressed lesions. However, EUS is also more helpful for the diagnosis of protruding lesions with regular surface structure, because it is sometimes difficult to diagnose the depth of invasion of these lesions by CS or magnified colonoscopy.

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36巻6号 (2001年5月)
電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院