Experts analyze the main causes of rectal cancer

Rectal cancer is a malignant tumor that occurs frequently in Western countries. It is mainly related to the dietary habits of Western countries and is extremely harmful to patients with rectal cancer. What are the common causes of rectal cancer ? Let's talk about the common causes of rectal cancer.

In general, the common causes of rectal cancer are:

1. Dietary factors: The so-called Western diet of high fat, high protein and low fiber is believed to be related to the cause of rectal cancer. In areas with high incidence of colorectal cancer in Western countries, the incidence of rectal cancer is high. In contrast, the Banti tribe in South Africa consumes rough food with low fat and rich fiber, and the incidence of rectal cancer is low. If these residents immigrate to areas with high incidence of rectal cancer, the dietary structure will change, and the incidence will increase accordingly. Because high-fat and high-protein foods can increase the amount of methylcholanthracene in feces, it can cause increased bile acid secretion, which is decomposed into unsaturated polyunsaturated hydrocarbons by anaerobic bacteria in the intestines. Both of these substances are carcinogens. The reduction in the amount of cellulose slows down the speed of feces passing through the intestines, which increases the contact time between these carcinogens and the intestinal conjunctiva, leading to an increase in the chance of cancer.

2. Inflammatory bowel disease: Ulcerative colitis and Crohn's disease are caused by the destruction of intestinal mucosa, the proliferation of ulcer repair, and the formation of granulation tissue, which leads to cancer. Schistosomiasis eggs are deposited in the rectal mucosa, and chronic inflammation stimulates cancer. This is a common cause of rectal cancer.

3. Genetic factors: In the families of patients with rectal cancer, many have a family history of cancer and many digestive tract tumors. Due to the change of genes in normal cells, cancer patients inherit a susceptibility, and with some stimulating factors, tissue cells grow rapidly and develop into cancer. Cell genetic genes mutate and become malignant cells with genetic characteristics, which manifests as a family history of cancer. This is also a common cause of rectal cancer.

The above is an introduction to the common causes of rectal cancer. I hope it will be helpful to you. For more questions about the causes of rectal cancer, you can consult our online experts, who will give you detailed answers.