Colorectal carcinoma represents a major cause of cancer deaths in the
United Kingdom, Tumours detected at an early or even premalignant stag
e have a better prognosis. In this review we consider the argument for
screening for colorectal carcinomas and discuss the means available a
nd the implications of implementing screening programmes using some of
these methods. A suggestion is made for the more rational use of limi
ted resources to target those at greatest risk.