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    Osteosarcoma and Malignant Fibrous Histiocytoma of Bone Treatment (PDQ®): Treatment - Patient Information [NCI] - General Information About Osteosarcoma and Malignant Fibrous Histiocytoma of Bone

    Osteosarcoma and malignant fibrous histiocytoma (MFH) of the bone are diseases in which malignant (cancer) cells form in bone.

    Osteosarcoma usually starts in osteoblasts, which are a type of bone cell that becomes new bone tissue. Osteosarcoma is most common in teenagers. It commonly forms in the ends of the long bones of the body, which include bones of the arms and legs. In children and teenagers, it often forms in the bones near the knee. Rarely, osteosarcoma may be found in soft tissue or organs in the chest or abdomen.

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    Coenzyme Q10 (commonly known as CoQ10) is a compound that is made naturally in the body. The body uses it for cell growth and to protect cells from damage that could lead to cancer (see Question 1). Animal studies have shown that CoQ10 helps the immune system work better and makes the body better able to resist certain infections and types of cancer (see Question 5). Clinical trials have shown that CoQ10 helps protect the heart from the damaging side effects of doxorubicin, a drug...

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    Osteosarcoma is the most common type of bone cancer. Malignant fibrous histiocytoma (MFH) of bone is a rare tumor of the bone. It is treated like osteosarcoma.

    Ewing sarcoma is another kind of bone cancer, but it is not covered in this summary. See the PDQ summary about Ewing Sarcoma Family of Tumors for more information.

    Having past treatment with radiation can increase the risk of osteosarcoma.

    Anything that increases your risk of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn't mean that you will not get cancer. Talk with your child's doctor if you think your child may be at risk. Risk factors for osteosarcoma include the following:

    • Past treatment with radiation therapy.
    • Past treatment with anticancer drugs called alkylating agents.
    • Having a certain change in the retinoblastoma gene.
    • Having certain conditions, such as the following:

    Signs and symptoms of osteosarcoma and MFH include swelling over a bone or a bony part of the body and joint pain.

    These and other signs and symptoms may be caused by osteosarcoma or MFH or by other conditions. Check with a doctor if your child has any of the following:

    • Swelling over a bone or bony part of the body.
    • Pain in a bone or joint.
    • A bone that breaks for no known reason.

    Imaging tests are used to detect (find) osteosarcoma and MFH.

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