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Radiation Therapy to Relieve Pain

Radiation therapy may be used for pain relief rather than as treatment for primary cancer in patients with cancer that has spread to the bone. Radiation may be given as local therapy directly to the tumor or to larger areas of the body. Local or whole-body radiation therapy may make pain medication and other noninvasive therapies work better by directly affecting the cause of the pain (for example, by shrinking tumor size). Radiation therapy may help patients with bone pain from cancer to move more freely with less pain.

Pain flare is an increase in pain after radiation therapy that develops before pain is relieved. Pain flare is being studied in patients receiving radiation therapy for cancer that has spread to the bone.

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External Beam Radiation Therapy

External-beam radiation therapy (EBRT) is a type of radiation therapy that uses a machine to aim high-energy x-rays at the cancer from outside the body. EBRT relieves pain from cancer that has spread to the bone in many patients. Radiation therapy may be given in a single dose or divided into several smaller doses given over a period of time. Single dose schedules and multiple dose schedules of EBRT are both effective for pain relief but single dose therapy is more likely to need to be repeated. Single dose EBRT for pain relief has not been found to cause more long-term harm than multiple dose EBRT. The decision whether to have single or multiple dose EBRT may also depend on how convenient the treatments are and how much they cost.

Stereotactic Body Radiation Therapy

Stereotactic body radiation therapy (SBRT) is a type of external radiation therapy that uses special equipment to position a patient and precisely deliver radiation to tumors in the body (except the brain). This type of radiation therapy helps spare normal tissue. SBRT may be used to treat cancer that has spread to the bone, especially spinal tumors. SBRT may also be used to treat areas that have already received radiation.

Bisphosphonates with Radiation Therapy

The use of radiation therapy given together with bisphosphonates is being studied in patients with cancer that has spread to the bone. More studies are needed to find out if giving bisphosphonates with radiation therapy relieves pain better than radiation therapy alone.

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