Who is the risk of colorectal cancer populations
Refers to the occurrence of colorectal cancer in the cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum cancer, is one of the most common malignant tumor, ranked No. 3 in a variety of malignant tumors. In recent years, the incidence of colorectal cancer in China showed a significant upward trend, only to Shanghai in 20 years, the incidence has increased by 2 ~ 3 times. Of particular note is the proportion of young people suffering from colorectal cancer is increasing. Although the doctors believe the increase in colorectal cancer and diet in an increased fat content, but its exact cause remains unclear. At present, the medical profession is known that certain diseases and colorectal cancer closely related to people suffering from these diseases is known as colorectal cancer at high risk. Therefore, from the perspective of prevention and early diagnosis to understand these diseases and susceptible populations, is very beneficial.
Colorectal polyps: Polyps are long out from the intestinal mucosa of a vegetation, size, shape, number, location varies. Patients, the elderly aged over 40 are more polyps increases with age also increased, can be diagnosed with the disease on colonoscopy. Polyp study its origin and can be divided into adenomatous hyperplasia (inflammation) of two broad categories. Known adenomatous polyps, especially multiple and diameter greater than 1 cm in adenomatous polyps greater risk, known as a precancerous lesion of colorectal cancer must be removed clean; even have been radical of adenomatous polyps in patients, but also regularly reviewed to see whether the recurrence.
Ulcerative colitis: is not an ordinary saying colitis, but in repeated episodes of sepsis will be the main symptom, colonoscopy can be seen, "aphthous-like" ulcer colitis. Ulcerative colitis occurs higher than normal risk of cancer 5 to 10 times, especially when a minor disease, but disease has been in operation, a wide range of lesions, duration of 5 years or more persons, a greater risk of cancer. It is noteworthy that in recent years, patients with ulcerative colitis in China increased significantly, thereby also increasing cause of cancer patients.
Schistosomiasis japonica: the disease is endemic to the area south of the Yangtze River in southern China. Schistosome eggs persist in the colonic mucosa to stimulate the intestinal mucosa caused by cancer. Schistosomiasis in the hardest hit regions in comparison with non-disease, colorectal cancer detection rate of 12.3 times higher.
Those who had received pelvic radiation therapy: the uterus, ovarian cancer patients often have to receive radiation therapy, the incidence of colorectal cancer 4 times higher than the common people, especially 10 years after radiotherapy, radiotherapy dose, patients.
Those who previously suffered from colorectal cancer: about 2% ~ 11% of patients with colorectal cancer foci in the treatment of the first one took place after the second primary colon foci (not recurrence), which is referred to as metachronous multiple. Therefore, the patient not to have been treated to sit back and relax, but to regular review. Previously received ovarian cancer, breast surgery, or administration of the sigmoid colon had ureteral anastomosis colorectal cancer who are also high-risk population.
Family members of patients with colorectal cancer: a family history of colorectal cancer the incidence of colorectal cancer than those without family history of high three times, in addition to genetic factors, may be related to the same eating habits.
Others: cholecystectomy patients, small bowel anastomosis in patients with asbestos-processing industry and the textile workers are also at high risk.
