Osteosarcoma
Osteosarcoma also is referred to as osteogenic sarcoma. It is the name of a specific malignant disease or tumor of the bone. It can develop in any bone but usually occurs in the long bones of the arms and legs. Most cases of osteosarcoma are diagnosed between ten and twenty years of age and occur slightly more often in boys than girls. Osteosarcoma is the most common type of bone tumor and sometimes occurs in a bone that has received very high doses of radiation as treatment for another type of cancer that occurred earlier. In most cases, no one knows what causes this disease. It is not contagious, and nothing you have done or not done is responsible for your child's tumor.