Colorectal cancer (CRC) is a major cause of morbility and mortality from cancer worldwide. Most studies on the survival of CRC patients comes from developed countries because and very few populations in developing have an appropriate monitoring systms, making it impossible to know the magnitude and impact of the problem. This work focused on determinig the survival of the population of the municipality of Pasto diagnosed with CRC during 2004-2008 to establish the population at risk over which should be directed prevention programs to reduce CRC mortality and increase survival of the population. In the results, the relative survival at 5 years was low (56%) and very similar to that reported in other populations before implementation of preventive programs and early diagnosis. Moreover, the increasing age, the decreasing of the degree of tumor differentiation and tumors of rectum and anus decreased the chances of survival.
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