As the tumor grows, the size of the tumor will gradually increase, which will fill up and compress the important channels such as blood vessels and digestive tubes causing obstruction and producing serious symptoms. At this time, doctors can put metal mesh stents inside the lesion to prop up the tumor and restore the lumen to be open. For example, esophageal cancer can lead to esophageal stricture, and patients will have difficulty in eating, and in severe cases, they cannot even swallow their own saliva and have to rely on fluids to sustain their lives. Often, the opportunity of surgical resection is lost at this time, and what the patient desires most is to resume eating, which is their biggest spiritual pillar. Doctors can use the method of placing an esophageal stent, which is a tube-like stent made of metal mesh, to the lesioned part of the esophagus to open the esophagus, so that the patient can eat. At the same time, radioactive particles can be carried on the stent, which makes the stent not only have the effect of relieving obstruction, but also have the effect of killing tumors around the stent. Some malignant tumors grow in the chest cavity and compress the large blood vessels inside, causing the blood to be blocked. At this time, blood pools in the upper part of the patient’s body, resulting in swelling of the head, thickening of the neck, thickening of the shoulders, thickening of the upper limbs, difficulty in breathing, and inability to rest in bed, only sitting on the bed, which is very painful. And some tumors grow in the abdominal cavity, which can block the venous blood return to the lower body, and the legs are seriously thickened like elephant legs, and the scrotum is highly swollen like a leather ball, and cannot walk, which is very painful. This condition is called superior (or inferior) vena cava obstruction syndrome, when a stent can be implanted in the blocked vessel to hold it open and allow blood to return to the heart, and the patient’s symptoms can be relieved immediately. Biliary drainage + stenting – improving the quality of life of patients with malignant obstructive jaundice Malignant obstructive jaundice is a disease caused by malignant tumors of the bile ducts or cancer of the head of the pancreas. As the tumor compresses the bile duct, resulting in bile duct narrowing or occlusion, bile cannot be excreted to the intestinal cavity through the bile duct and stagnates in the liver, resulting in dilatation of intrahepatic bile ducts, damaging liver function, causing infection and accelerating disease development. Patients will have yellow skin all over the body, itching, and white or dark green stools. However, such patients are mostly in the middle and late stages of the tumor, which can no longer be removed surgically, while radiotherapy and chemotherapy are almost ineffective. The only treatment that can be done at this time is to drain the bile out of the body or excrete it into the intestine to relieve the unfavorable state caused by the obstruction. Usually, percutaneous transhepatic internal/external biliary drainage + endobiliary stent implantation is the most common interventional treatment. This procedure is performed by simply puncturing a rice-sized hole in the patient’s abdomen with a needle, through which a guidewire enters the bile duct, delivers a drainage catheter, and places a metal stent to dilate the compressed bile duct and resolve the bile duct obstruction. With a needle-eye sized trauma and one to twenty minutes of surgical time, we have completed hundreds of such patients in recent years, prolonging their lives, improving life treatment and reducing pain.