It is even more important for tumor patients to avoid foods that contain carcinogenic and cancer-promoting substances. Such as moldy food, smoked food, rotten food and pesticide-contaminated food. Different tumors should have different dietary emphasis. For example, breast cancer patients should avoid high-fat diet; colorectal cancer patients can use high-fiber, high-protein and low-fat diet. Different treatment stages of tumors have different dietary emphasis. For example, before and after surgery, patients should take diets rich in protein and vitamins; in the stage of radiotherapy, foods such as watermelon, winter melon, red kidney beans and Chinese cabbage can be added, which are beneficial to the excretion of toxic substances. At the same time, the dietary contraindications of other diseases should be taken into account. For example, if tumor patients combine with diabetes mellitus, high sugar diet should be used cautiously; if they combine with hyperlipidemia, low-fat diet should be used. Tumor patients should pay attention to consume more soft food and easy digestible food in their daily diet. For patients with esophageal cancer and gastric cancer, they should pay more attention to avoid taking nuts, fried oil cakes and other foods. Many patients are unable to eat because of benign and malignant diseases in esophagus, stomach, lungs, etc. For this kind of patients, our interventional vascular department can solve this problem through esophageal stenting, which has achieved remarkable results, significantly improved the patients’ diet, and provided good nutritional support for the further treatment of the patients. Indications of esophageal stent implantation: 1, malignant esophageal stenosis: including unresectable esophageal cancer or pancreatic cancer, local recurrence of anastomosis after esophagectomy and stenosis of esophageal cancer after radiotherapy, esophageal stenting is the first choice. Esophageal tracheal fistula, esophageal mediastinal fistula, postoperative anastomotic fistula of esophageal cancer and esophageal rupture caused by various reasons can be rapidly closed by inserting coated esophageal stent, which can significantly improve the symptoms, and 75% of the patients can resume oral feeding after operation, which is difficult to be replaced by other treatment methods. 3.Benign esophageal stenosis caused by various reasons, mainly anastomotic scarring stenosis after esophagectomy and scarring stenosis after chemical burns, esophageal dilatation is carried out first, and then a retrievable coated esophageal stent is put in, which can use the good self-expansion power of the stent to continuously expand the narrowed esophagus. 4-6 months later, when the stenosis is stabilized at a certain caliber, the esophageal stent will be retrieved. 4. Cardia dystrophy. 5.Pre-placement before radiotherapy is to put the stent before radiotherapy for esophageal cancer to avoid stenosis during radiotherapy. In this kind of cases, the stent needs to be taken out after radiotherapy, so it should be chosen as a recyclable coated metal esophageal stent, and the effect of this type of stent on the radiation will be smaller.