Masses left behind by healed tissue after a fracture or by certain diseases such as bone tumors are called skeletal masses. The skeletal system, like other organs, can develop tumors from any tissue component or metastatic lesions from other organs. Tumors that invade the bone can occur in the bone cells, the hematopoietic component of the bone, the cartilage, and the fibrous or synovial component. Other tumors may arise from the muscles and nerves, blood vessels, and fatty tissue of the bone. Bone lumps may not be felt at the beginning, but when the lump is larger, there may be swelling and pressure pain. 1.Bone X-ray examination: It is the most commonly used examination method for preliminary diagnosis, if the tumor can be located in epiphysis, or in stem bone epiphysis, or in long bone or flat bone; tumor occurring in adolescent epiphysis should be considered as chondroblastoma first, while tumor in adult epiphysis above should be considered as giant cell tumor of bone. 2.Histological examination: It is considered to be a diagnostic method with the highest accuracy rate. 3.CT and MRI: It can detect the diseased tissues earlier and has a high accuracy rate.