Age. About 90% of patients diagnosed with colorectal cancer over 50 years. It is much less colon cancer occurs in young people.
Previously deferred colon cancer or adenomatous polyps.
Inflammatory bowel disease such as Crohn's disease, ulcerative colitis, and others.
Congenital pathology of the colon, such as a family polyposis. In people with familial polyposis risk of colon cancer after the age of 45 years reaches 90% (no treatment).
Family history of colon cancer.
Diet. Colon and rectal cancer may be associated with a diet poor in fiber and rich in animal fats. Some studies have also linked the risk of cancer and mostly meat diet. This is confirmed by food diet in different nations, and the incidence of colon cancer in them.
Lack of exercise. Low physical activity (physical inactivity) is also a risk of colon cancer. With a lack of physical activity, and also notes the poor performance of the intestine, which leads to constipation, which, in turn, contribute to changes in the intestinal mucosa.
Diabetes mellitus. In people with diabetes and insulin resistance also has the risk of developing colon cancer.
Obesity. In people with obesity-colon cancer risk is higher and in addition, they have a higher death rate from colon cancer, compared with similar patients with normal weight.
Smoking. For smokers the risk of colon cancer is higher, and they also have higher rates of mortality from this disease.
Disturbances of growth hormone. Growth hormone - somatropin, which is released by the pituitary gland affects the proper growth of the organism. With its increased production, which occurs in certain diseases of the pituitary gland, a state of acromegaly, which indicate an increase in the growth of certain body parts. It is noted, and a high risk of colon cancer.
Radiation therapy. Radiation therapy directly into the abdomen, which was held earlier for other tumors, is also a risk factor for cancer.