Abstract
Our previous paper described how to implement efficient screening TCS (S-TCS) for invasive carcinoma 1). This report presents a reconsideration of how to implement efficient S-TCS, and the extension of the investigation period for another year. Of the 34,348 subjects who had undergone STCS for the first time at our center from 1992 through 1999, 1, 184 that were found to have invasive carcinoma were investigated. The results are as follows.(i) Implementing initial S-TCS for those suspected of colorectal cancer at 35 years of age or over seems efficient.(ii) Performing only a single S-TCS yields very hight screening effect.(iii) When m tumor or adenoma is detected at the initial screening, it is efficient to perform a second screening 3 years thereafter.(iv) When m tumor or adenoma is not detected at the initial screening, the second screening can wait until 5 years after the initial screeing.(v) A third S-TCS may not be necessary for some time.
