The survival time of duodenal cancer after surgery cannot be generalized. After early radical duodenal surgery, the 5-year survival rate can be about 25%. Once the opportunity of surgery is missed, the survival rate will be less than 20%. The treatment effect of duodenal cancer is relatively poorer than other GI tumors, and the surgical cure rate is lower, and the expected survival time varies from person to person. Early symptoms of duodenal cancer are not obvious and difficult to detect. The tumor grows infiltratively and can obstruct the duodenum, or even narrow and obstruct. The 5-year survival rate is only about 25% if the patient is in the middle stage of duodenal cancer. If the chance of surgery is missed, the survival rate will be less than 20%. If patients with duodenal adenocarcinoma are not given active intervention and extensive metastasis occurs, the advanced stage will be inoperable and the effect of comprehensive treatment is poor, and the life expectancy is usually not more than 1 year. For duodenal cancer, clinical emphasis is placed on early detection, early diagnosis and early treatment in order to prolong the survival of patients.