Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comparative Study
. 2003 Sep;9(9):1985-9.
doi: 10.3748/wjg.v9.i9.1985.

Differences in endoscopic classification of early colorectal carcinoma between China and Japan: a comparative study

Ren-Min Zhu  1 , Fang-Yu Wang, Ichiro Hirata, Ken-Ichi Katsu, Shu-Dong Xiao, Zhong-Lin Yu, Zhi-Hong Zhang, Zhao-Min Xu
Affiliations
Comparative Study

Differences in endoscopic classification of early colorectal carcinoma between China and Japan: a comparative study

Ren-Min Zhu et al. World J Gastroenterol. 2003 Sep.

Abstract

Aim: To compare the differences in the endoscopic classification of early colorectal carcinoma (CRC) between Japan and China.

Methods: Ten cases of early CRC were included in the study. After reviewing the color pictures of these cases, 5 Japanese endoscopists and 5 Chinese endoscopists made their classificatory diagnosis individually using the current Japanese classification, and indicated their findings on which the diagnosis was based.

Results: Some lesions diagnosed by the Japanese endoscopists as IIa or IIa plus IIc, were classified as Is or Isp by the Chinese endoscopists. For superficial lesions consisting of elevation plus central depression, IIa plus depression, IIa plus IIc or IIc plus IIa were classified according to the ratio of elevated area/depressed area. However, international as well as interobserver difference still existed in the classification of such lesions. In addition, most Chinese endoscopists overlooked slightly depressed part on the top of a protruded lesion. Laterally spreading tumor, a special type of IIa, was identified as LST by some Japanese endoscopists.

Conclusion: Discrepancies on macroscopic classification for early CRC do exist between Japanese and Chinese endoscopists, which are found not only in terminology but also in recognition of some lesions. In order to develop a universal classification, it needs for international communication and cooperation.

PubMed Disclaimer

Figures

Figure 1
Figure 1
Submucusal adenocarcinoma with a diameter of 10 mm and a height of 5.5 mm. A: before indigocarmine staining, B: after indigocarmine staining.
Figure 2
Figure 2
Mucosal adenocarcinoma with a diameter of 13 mm and a height of 1.5 mm. A: before indigocarmine staining, B: after indigocarmine staining.
Figure 3
Figure 3
Adenoma with a diameter of 5 mm. A: before indigocarmine staining, B: after indigocarmine staining.
Figure 4
Figure 4
Submucosal adenocarcinoma with a diameter of 8 mm. A: before indigocarmine staining, B: after indigocarmine staining.
Figure 5
Figure 5
Mucosal adenocarcinma with a diameter of 26 mm. A: before indigocarmine staining, B: after indigocarmine staining.
Figure 6
Figure 6
Submucosal adenocarcinoma with a diameter of 28 mm. A: before indigocarmine staining, B: after indigocarmine staining.
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Bond JH. Colorectal cancer screening. Curr Opin Oncol. 1998;10:461–466. - PubMed
    1. Breen N, Wagener DK, Brown ML, Davis WW, Ballard-Barbash R. Progress in cancer screening over a decade: results of cancer screening from the 1987, 1992, and 1998 National Health Interview Surveys. J Natl Cancer Inst. 2001;93:1704–1713. - PubMed
    1. Wan J, Zhang ZQ, Zhu C, Wang MW, Zhao DH, Fu YH, Zhang JP, Wang YH, Wu BY. Colonoscopic screening and follow-up for colorectal cancer in the elderly. World J Gastroenterol. 2002;8:267–269. - PMC - PubMed
    1. Kudo SE, Hara E. [New trends in diagnosis and treatment of depressed and flat type neoplasms in colon and rectum] Nihon Shokakibyo Gakkai Zasshi. 2002;99:463–468. - PubMed
    1. Schroy PC, Heeren T, Bliss CM, Pincus J, Wilson S, Prout M. Implementation of on-site screening sigmoidoscopy positively influences utilization by primary care providers. Gastroenterology. 1999;117:304–311. - PubMed

Publication types