Common risk factors for colorectal cancer

Colorectal cancer is a malignant tumor second only to gastric cancer and esophageal cancer. It is generally more common in middle-aged and elderly people. The causes of colorectal cancer have also been studied by experts. The following is an introduction to the causes of colorectal cancer by relevant experts.

1. Dietary factors: It is generally believed that a diet high in animal protein, high in fat and low in fiber is a factor in the high incidence of colorectal cancer. People have found that in areas with a high incidence of colorectal cancer, such as Western Europe and the United States, as the intake of high-cholesterol foods such as fat and protein in the diet increases, the number of people with colorectal cancer also increases accordingly. In addition, by observing the incidence of immigrants, the relationship between a high-fat, high-protein diet and the incidence of colorectal cancer has been further confirmed. Studies have found that the incidence of colorectal cancer in Chinese and Japanese is relatively low, but the incidence of colorectal cancer in Chinese and Japanese living in the United States has increased significantly, close to that of local people.

The most obvious change in the living habits of these overseas Chinese is their dietary structure, which has changed from a high-fiber, high-carbohydrate diet to a high-fat, high-protein diet. Further research shows that compared with overseas Chinese and Japanese who have recently immigrated to the United States (who have not completely changed their dietary habits), Americans have significantly higher levels of bile acid metabolites such as deoxycholic acid and lithocholic acid, and cholesterol metabolites in their stool. Animal experiments have confirmed that these changes can lead to the occurrence of colorectal cancer. Increasing fiber intake can play an effective protective role.

2. Genetic factors: People with a family history of colorectal cancer have a 2-6 times higher risk of colorectal cancer than the general population. Several genes and genetic diseases cause great harm to colon cancer. This is also one of the causes of colorectal cancer.

The above is an introduction to the causes of colorectal cancer. Only by clearly understanding the causes can we prescribe the right medicine. If you want to know more about colorectal cancer, please consult online experts.

For more information, please visit the colorectal cancer topic at http://www..com.cn/zhongliu/dca/ or consult an expert for free. The expert will then give a detailed answer based on the patient's specific situation.