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The goal of radiation therapy is to use high-energy X-rays to kill cancer cells and shrink tumors or keep them from coming back. This may also ease symptoms, such as bleeding or pain.
Radiation is used most commonly to treat kidney cancer that has spread to the brain or bones and to treat pain caused by bone metastasis. It kills the cancer cells in the bone. It also stabilizes a bone that has been weakened by metastasis and may be at risk for breaking. Your doctor may suggest radiation as your main treatment if you can’t have surgery.