Intestinal adenocarcinoma is a common malignant tumor of the digestive system. At present, there are three clinical reasons for the occurrence of intestinal adenocarcinoma: 1. Long-term poor dietary habits lead to intestinal adenocarcinoma. If chronic inflammatory diseases are not treated, more than half of the patients will develop into intestinal adenocarcinoma after more than 10 years of illness. 3. Patients with intestinal polyps, especially some adenomatous polyps, such as villous adenomatous polyps, have a cancer rate of 50%. The cancer rate of tubular adenomatous polyps also reaches 20%.