Who is more likely to develop colorectal cancer?

The exact cause of colon cancer develops in some people and not in others is unclear. The incidence of colorectal cancer varies greatly in different countries and within the different ethnic groups within a country. In developed countries like USA, Canada, UK, Western Europe, Australia and Japan has a much higher incidence of colorectal cancer have compared to the less industrialized parts of the world such as Asia, Africa, South --America. Colorectal cancer represent more than 9 percent of all cancers in men and about 10 percent of all cancers in women worldwide. In industrialized countries, the incidence of colon cancer can be as high as 12 to 14 of all cancers and in non-industrialized countries, much lower rates of diagnosed about 7 to 8 percent of all cancers may be cancer.

Without skin cancer, colorectal cancer is the third most common cancerDiagnosis in the United States. Each year, more than 100,000 Americans with colon cancer and is more than 50 percent of patients diagnosed with colon cancer. Colon cancer incidence dying is not much different between men and women, colon cancer is slightly more common in women compared to men, the ratio of 1.2:1) (but the rectum is more common in men (ratio of 1.7: 1).

Even if we do not know theexact cause of the development of colorectal cancer, scientists have identified several factors that may increase the risk of developing colon cancer. A risk factor for a disease is any condition that a person more likely to develop that makes that disease. Some risk factors such as dietary factors, by the person concerned, while some other un-modifiable factors such as age are changeable. These risk factors may act in combination, and this combination of risk factors mayassociated with cumulative increase in the risk of developing colon cancer. The mere presence of one or more risk factors does not necessarily mean that someone develop colon cancer. On the other hand, the absence of any risk factors does not mean that an individual will not develop cancer, but generally more risk factors you have, the higher chance of developing colorectal carcinoma. Environmental factors may play a rolethe development of colon cancer. People who tend to migrate from areas with low risk for the regions in the world with a higher risk of colon cancer led them to the risk of the country in which they migrate to acquire. This finding suggests the presence of environmental factors may be at higher risk of developing colon cancer. Changes in dietary habits, factors associated with migration also contributes to the increase of the risk associated with migration ofAreas with low risk with a higher risk areas.

Risk factors for the development of colon cancer include the following:

Age over 50 years
Increased fat intake
Large polyps
Family history of colon cancer
Inflammatory bowel disease such as ulcerative colitis and Crohn's disease.
Personal history of other cancers
Sedentary lifestyles and lack of exercise
Obesity
Diabetes
Smoking
Alcohol
Genetic cancer syndromessuch as familial adenomatous polyposis or hereditary non-polyposis colon cancer (HNPCC)

People at high risk of colorectal cancer may need to undergo screening for colorectal cancer with colonoscopy once every 2 to 3 years. Screening colonoscopy is recommended for anyone who will be 50 years or older. If someone has a higher than average risk of developing colorectal cancer, screening can be started no earlier than 50 years.

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