Osteochondroma is the most common benign tumor, often attached to the metaphyseal bone protruding, also known as exostoses. Tumors often occurred in the metaphysis of long bone, the long bone involvement order of distal femur, proximal tibia, distal tibia, the top of the humerus, radius bone lower, scapula, pelvis and ribs.
Osteochondroma is single and multiple two. Osteochondroma see multiple epiphyseal continued even in dry, bone, cartilage alone in patients with mostly young people, the actual age of onset smaller. In a joint near the border clearly got the fracture sclerosis, not mobile, no tenderness. Some affected tendon sliding due to a neighboring joint activities barriers, or have mild pain. Swelling also greater, the blood vessels can cause nerve compression symptoms. If the rapid growth in a short time, should consider the possibility of malignant transformation (1%). A positive X-ray found.
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