Extraosseous mass

Introduction Central chondrosarcoma is a chondrosarcoma that originates in the bone. The main symptoms are deep pain, not severe, and non-sustainable. During the progression of the tumor, a large spherical extra-bone mass can be formed. There are obvious areas of good hair, followed by the femur (especially the proximal end), the pelvis, the proximal humerus, the scapula, and the proximal humerus. Less common sites are the other bones of the torso, the humerus, the ulna, the foot and the hand (the chondroma is common in the hand and rarely found in the trunk bone). Chondrosarcoma is one of the common malignant bone tumors. It occurs in the medullary cavity as the center type, and in the periosteum is the periosteal type, and a few can occur in the soft tissue.

Cause

The cause of chondrosarcoma is unknown. The disease occurs from chondrocytes or mesenchymal tissue and originates from the bones of any cartilage internalized bone of the body, possibly related to abnormalities in the chromosome.

an examination

Related inspection

Bone imaging

The symptoms are mild and slow to develop. The disease has a long history and sometimes manifests as a "chondroma-like" tumor that recurs after local surgery. The main symptoms are deep pain, not severe, and non-sustainable. Since the tumor has not expanded into the soft tissue, it often cannot reach the extra-bone mass, but only a slight bone enlargement; in the advanced stage of the tumor, a large spherical extra-bone mass can be formed.

If the central chondrosarcoma is located in the spine, humerus, ribs or pelvis, it can compress the nerve trunk, causing severe pain and sometimes radioactive pain.

Some cases grow rapidly and have strong invasiveness. In the early stage, cortical bone can be destroyed and invaded into soft tissues to form a large soft tissue mass.

In some cases, joints can be invaded from the epiphysis, causing joint symptoms. Pathological fractures are rare.

Differential diagnosis

1. There are often scattered calcifications in the chondroma, but less and smaller than chondrosarcoma, the cortical bone remains intact, and there is no tumor soft tissue mass.

2. Osteochondroma is a bony prominence attached to the metaphysis. The shape of the osteochondroma is thick. The thicker cartilage cap also shows the cauliflower-like calcification shadow at the end of the tumor. In the chondrosarcoma secondary to osteochondroma, the cartilage cap is thicker and more obvious, and a soft tissue mass is formed, and a large amount of irregular flocculent calcification spots are visible therein.

3. Osteosarcoma is easily confused with central chondrosarcoma, especially when there is no calcification in chondrosarcoma, which is similar to osteolytic osteosarcoma. However, if osteosarcoma has characteristic tumor ossification, and periosteal reaction is significant, the difference.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.