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Understanding Radiation Therapy

Radiation therapy, also called radiotherapy, is the careful use of radiation to treat many different kinds of cancer.

  • Cancer doctors, called radiation oncologists, use radiation therapy to try to cure cancer, to control cancer growth or to relieve symptoms such as pain.
  • Radiation therapy works within cancer cells by damaging their ability to multiply. When these cells die, the body naturally eliminates them.
  • Healthy cells that grow and divide quickly are also harmed by radiation, but they are able to repair themselves in a way cancer cells cannot.