Bone tumors are divided into benign bone tumors, malignant bone tumors or metastatic malignant bone tumors, with the following sites of occurrence: 1) benign bone tumors: they can be found in all bones of the body; 2) malignant bone tumors: they usually occur in the metaphysis of the limbs, which are rich in blood flow. The peak age of occurrence is teenagers; 3, metastatic bone tumor: old age bone tumor is mainly metastatic bone tumor, such as lung cancer, kidney cancer, prostate cancer, breast cancer, through the blood, lymphatic transmission, resulting in malignant bone tumor metastasis. They occur in the spine, thoracic vertebrae, lumbar vertebrae, sacrum, pelvis and other parts of the body.