Extraskeletal masses are chondrosarcomas. Central chondrosarcoma is a chondrosarcoma that originates from within the bone. The main symptom is deep pain that is not intense and non-persistent. In the progressive stage of the tumor, large spherical extraosseous masses may form. There are distinct sites of predilection, in order of predilection, for the femur (especially proximal), pelvis, proximal humerus, scapula, and proximal tibia. The other bones of the trunk, the radius, the ulna, the foot, and the hand are the less frequent sites of softness (chondrosarcoma is common in the hand and less common in the bones of the trunk). Chondrosarcoma is usually slow to develop and the most common symptom is pain, which starts as a dull, intermittent pain that gradually worsens, followed by a slowly growing mass. Symptoms exist for an average of 1 to 2 years. Examination may reveal a painful mass with pressure, limited joint motion, and localized warmth of the mass may be palpable. Primary chondrosarcoma is usually under 30 years of age and more common in males than females. It occurs in the long bones of the extremities, especially in the lower femur, upper tibia and upper humerus epiphysis. Other bones such as ribs, iliac bone, scapula or sternum also have incidence. It is rare that it occurs in short bones. The main symptom is a dull pain of a dull nature. It may change from intermittent to persistent and affect the adjacent joints, limiting their movement. Sometimes a localized lump is found without significant pressure pain, and the surrounding skin may be congested and red. Secondary chondrosarcoma is usually found in adults over 30 years of age and is more common in men. It is more common in the pelvis, followed by the scapula, femur and humerus. The main manifestation of chondrosarcoma is the appearance of lumps, the course of the disease is slow, pain is not obvious, the surrounding skin is not red and hot, when it is close to the joints, it may cause joint swelling and restricted movement, if the nerve is stimulated and compressed, it may cause radioactive pain and numbness. Tumors located in the thoracic cavity and pelvis are usually difficult to be detected until the tumor compresses the internal organs and produces corresponding symptoms.