The most common types of bone tumors in clinical practice are as follows: First, osteochondroma, which occurs mainly in adolescents, will gradually increase in size as the human body grows and develops, but its growth will stop after the human body has finished growing. These diseases are usually found in the epiphysis of the long bones, that is, the distal femur and the proximal tibia. Secondly, bone cysts are single-chambered cyst-like lesions in the bone. This cystic lesion is mainly a cystic defect in the bone with some plasma or serum-like fluid inside, and is commonly seen in children and adolescents, usually in the epiphysis of long tubular bones. Third, giant cell tumor of bone, which is a type of junctional, or indeterminate bone tumor, can be divided into giant cell tumor and malignant giant cell tumor. Fourth, osteosarcoma, a common malignant bone tumor, mostly occurs in adolescents, with posterior sites located in the distal femur, proximal tibia, and proximal humerus. Fifth, metastatic bone tumors, which are often seen in middle-aged and elderly people, mostly from breast cancer, prostate cancer, lung cancer, kidney cancer and other metastases.