Bowel cancer, also known as colorectal cancer, is one of the most common malignancies. Although the incidence rate in China is generally low, it has shown an increasing trend in recent years. The causes of bowel cancer are related to many factors, including dietary habits, lifestyle, genetic factors, disease history, etc. Therefore, it is particularly important to understand high-risk groups early and screen them in advance.
In China, the high-risk groups of bowel cancer mainly include the following aspects:
1. ** in areas with a high incidence of bowel cancerIt is the highest in first-tier cities such as Beijing, Shanghai, Guangzhou and Shenzhen, which is mainly related to high-fat and high-protein diet and lack of exercise.
2. Patients with colorectal adenoma:The mucosa of colorectal cancer with adenoma is 100 times more likely to become cancerous than normal mucosa without adenoma and should be closely followed up and re-examined. 3. Those who have suffered from colorectal cancer before:There are about 25% to 11% of colorectal cancer patients** can redevelop primary colorectal cancer after surgery and should be followed up as a high-risk group. 4. Patients with schistosomiasis, pelvic patients who have received radiation**, patients with chronic ulcerative colitis:These diseases are related to the occurrence of bowel cancer and should be noted. 5. Family members of colorectal cancer patients:A large number of studies have found that the incidence of bowel cancer in family members of colorectal cancer patients is about 3 times higher than that of the control group. 6. Genetically related diseases:Such as adenomatous polyposis syndrome, familial adenomatous polyposis, hamartic polyposis syndrome, Peutz-Jeghers syndrome, Juvenile adenomatous polyposis (syndrome), hereditary nonpolyposis colorectal cancer, etc., such people have a higher risk of bowel cancer. 7. Others:Patients with positive fecal occult blood or chronic diarrhea, frequent mucobloody stools, or chronic constipation should also be aware of the possibility of bowel cancer. 
For the above-mentioned high-risk groups, it is recommended to carry out screening in advance, and the starting age of screening is recommended to be before the age of 40, and colonoscopy is the main screening method. Hereditary diseases such as familial polyposis should be intervened during adolescence. 
Colorectal cancer can effectively reduce the incidence and mortality of colorectal cancer through early screening and diagnosis. At the same time, the public should also raise awareness of bowel cancer and pay attention to diet and lifestyle adjustments to reduce the risk of bowel cancer.