Ewing sarcoma is a rare type of cancer. It’s most common in children and teens between the ages 10 and 19. It usually grows in bone, but it can also grow in soft tissue that’s connected to the bone. This may include tendons, ligaments, cartilage, or muscles.
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Osteosarcoma is cancer of the bone. The cancer (malignant) cells make immature bone cells (osteoid). Osteosarcoma is rare, but it is the most common type of bone cancer in children and teens. It is most common when teens have growth spurts. That is between the ages of 13 and 16.
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