Common indications for body gamma knife include: 1, primary lung cancer or metastatic lung cancer: stage I and II can achieve radical treatment, stage III and IV are palliative treatment; 2, hepatocellular carcinoma, hilar cholangiocarcinoma: poor liver function or the presence of portal vein cancer thrombus, surgery can not completely cure, SBRT treatment can be chosen; 3, pancreatic cancer: special anatomical structure, surgery is more difficult to cure, internal drainage to solve jaundice, then treatment; 4, mediastinal and retroperitoneal lymph node metastases are more isolated or less, it is appropriate to use stereotactic radiation therapy.