In general, bone tumors include primary tumors of bone and soft tissues, metastatic tumors, and tumor-like lesions of bone. If we talk about bone lesions alone, in terms of location, skull is usually seen by brain surgeons, sternum and ribs are usually seen by thoracic surgeons, and the rest of bone diseases belong to orthopedics. The rest of the skeletal diseases belong to orthopedic surgery. The main difference lies in the attribution of spinal tumors. In some hospitals, spinal tumors are also classified as orthopedic oncology, while in other hospitals, spinal tumors can be seen in both spinal surgery and orthopedic oncology. In the Department of Orthopedics of Tongji Hospital, retroperitoneal, pelvic and extremity tumors are seen by doctors specializing in orthopedic oncology, while spinal tumors are assigned to spinal surgery.