According to the data of cancer registries, the morbidity and mortality of colorectal cancers have considerably increased in the past 15 years. The Hungarian data follow this international trend: yearly 2000-3000 new cases must be reckoned with. Early diagnosis could substantially improve the mortality rates which in Hungary are rather unfavourable as compared to the international data. The results of the surgical treatment of colorectal cancers have not improved essentially in the past decades, although early diagnosis, followed by timely treatment, may increase the chances for cure and improve the postoperational quality of life. Screenings performed in Hungary also report on the favourable results of early diagnosis.