Radiation therapy uses high-energy rays or particles to kill cancer cells.
When is radiation therapy used?
As the first treatment for cancer that is still just in the prostate gland and is low grade. Cure rates for men with these types of cancers are about the same as those for men treated with radical prostatectomy.
As part of the first treatment (along with hormone therapy) for cancers that have grown outside the prostate gland and into nearby tissues.
If the cancer is not removed completely or comes back (recurs) in the area of the prostate after surgery.
If the cancer is advanced, to help keep the cancer under control for as long as possible and to help prevent or relieve symptoms.
Types of radiation therapy
The 2 main types of radiation therapy used for prostate cancer are:
External beam radiation
Brachytherapy (internal radiation)