Abstract
The early detection of colorectal cancer has become more important policy in Japan, by reason of the increasing incidence of its death rate. In the mass survey of the large bowel, the idea of selective mass survey must be indicated. That is, the screening program prior to the detailed examination is necessary in this mass survey.
The program and the result of our mass survey tried in 1980 are as follows ;
The screening test, used with the questionaire and the three days fecal occult blood testing, selected 295 people (19.1 %) from 1547 population of 13 companies. They had the detailed examination of fiberscopy and/or barium enema. One early cancer and 15 adenomatous polyps were detected.
