1992 Volume 41 Issue 1 Pages 29-34
In order to know the present state of mass survey for large-bowel cancer in rural areas, we gathered the results of colorectal screening in 1989 from 45 hospitals or cancer detection center related to agricultural cooperatives of all over Japan.
In all of the 45 institutions, method of screening was fecal occult blood test, and in most of them, the stool study was immunological, of one day, and without meal restriction. Methods of further precise examination such as barium enema, total colonoscopy, sigmiodoscopy, or proctoscopy, solely or combined, were employed depending to the facilities.
The total number of examinees were 194, 834, and 8, 523 (4.4%) had a positive reaction for occult blood. Further precise examinations were performed in 4, 351 (59.7%) examinees, and 148 cases of large-bowel cancer were detected. The detective rate of cancer in total examinees was 0.08%. Among these 148 cases of colorectal cancer, 43 cases (51.8%) were in early stage. Examinees in their fifties were the most in number, and both the rate of positive reaction and the rate of cancer detection were increased as the age gets older.
