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Screening for Colorectal Cancer M. Tada 1 , K. Hayashi 2 , T. Miyaoka 2 , Y. Akasaka 2 , K. Kawai 2 1Dept. of 3rd Internal Med., Kyoto First Red Cross Hospital 2Dept. of Preventive Med., Kyoto Prefectural Univ. of Med pp.423-429
Published Date 1980/4/25
DOI https://doi.org/10.11477/mf.1403106816
  • Abstract
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 The age adjusted death rate from gastric cancer in Japan has decreased gradually since the peak in 1959. On the contrary, according to the change of our environmental factors, colon cancer has been increasing as among Americans and Europeans. Therefore, the screening system similar to gastric mass survey regime should be established as soon as possihle.

 There are several methods to detect colorectal cancer from asymptomatic people: questionaire as a screening filter of colon cancer, fecal occult blood test, sigmoidofiberscopy and so on. One of the most important techniques for the screening of colon cancer is the analysis of complaints caused by colon diseases. By analysis of questionaire responses, patients with colon cancer are easily differentiated from nomal subjects. However, patients with benign polyp and early cancer are not differentiated well from normal subjects. Fecal occult blood test is one of the most effective and simple methods of screening for colon cancer. However, there still exist false positives and negatives in this screening test and small and/or early lesions cannot be detected by fecal occult blood test alone. Endoscopic screening for the lower parts of the colon, most common sites of colon cancer, with flexible sigmoidofiberscope (TCFIS, CFHITS) are easily and effectively performed with minimal bowel preparation and without trouble to patients.

 Under evaluation of these screening techniques, a screening system for the early detection of colon cancer is proposed and it is desired that this screening system become as widely as gastric mass survey.


Copyright © 1980, 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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