Key points are not available for this paper at this time.
Colorectal cancer (CRC) is a worldwide problem, with an annual incidence of approximately 1 million cases and an annual mortality of more than 500,000. The absolute number of cases will increase over the next two decades as a result of the aging and expansion of populations in both the developed and developing countries.South African Gastroenterology Review Vol. 6 (1) 2008: pp. 13-20
Winawer et al. (Mon,) studied this question.