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How is radiotherapy given?

Radiotherapy can be given in two ways:

  • External radiotherapy—a machine from outside the body aims radiation beams towards the cancer and surrounding tissues where the cancer may have spread.
  • Internal radiotherapy (brachytherapy)—a radiation source is put inside the body on or near the cancer.
    Depending on the type and size of the cancer and where it is in your body, you may have one or both types of radiotherapy.