The colorectal cancer reaches the 3 th among the most common cancers in Canada, both in men than in women. One in 14 men and 1 in 15 women are at risk of colorectal cancer in their lifetime 1 .
Colon cancer (colorectal cancer): understand everything in 2 min
Some people may contract it because of a hereditary predisposition . But in 75% of cases, heredity is not in question.
The colorectal cancer takes years to form, as the majority of cancers. It usually does it from polyps in the wall lining the inside of the colon . Polyps are small, fleshy growths. There are several kinds of it. Most often, they are benign. However, we know that some of them can become cancerous. It takes an average of 10 years for a polyp to form a cancerous tumor. Polyps (cancerous or not) sometimes cause digestive discomfort . For more information, see our leaflet Intestinal Polyps.
As soon as the doctor detects polyps in a patient, he conducts tests to find out if they pose a risk to his health.
At an advanced stage of development, colorectal cancer can spread to the lymph nodes, then to the liver and then to other parts of the body, forming metastases .
In Canada, colorectal cancer is the 2 th leading cause of death by cancer. The death rate 5 years after diagnosis is about 40%, in both sexes.
Currently, more than half of cases are diagnosed in people aged 70 and older 1 . Health professionals would like more people to be screened regularly by the age of 50, and earlier for people at risk. The earlier the cancer is detected, and it is possible to do so before the onset of symptoms, the better the chances of recovery .