Bone tumors are tumors that occur in bones or their accessory tissues (blood vessels, nerves, bone marrow, etc.) and are common diseases. Like other tissues in the body, the exact cause is unknown; bone tumors can be benign or malignant. Benign bone tumors are easy to cure and have a good prognosis, while malignant bone tumors develop rapidly, have a poor prognosis, and have a high mortality rate. There is still no satisfactory treatment. Malignant bone tumors can be primary or secondary, and malignant tumors from other tissues or organs in the body are transferred to the bones through the blood circulation and lymphatic system or directly invade the bones. There is also a type of lesion called tumor-like lesions. The tissues of tumor-like lesions do not have the characteristics of tumor cell morphology, but their ecology and behavior are destructive to tumors. They are generally more limited and easier to cure.