Experts in radiation oncology at Mayo Clinic treat more than 7,000 people who have a wide variety of cancers each year. Radiation oncologists work closely with medical oncologists, surgeons and other doctors to coordinate the most appropriate care for you.

Radiation therapy uses carefully targeted and regulated doses of high-energy radiation to kill cancer cells. Radiation causes some cancer cells to die immediately after treatment, but most die or become incapacitated as a result of the radiation-induced damage to the cancer cell's chromosomes and DNA.

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