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How does radiation therapy treat urinary system cancers?

Radiation therapy is sometimes used to treat urinary system cancers, especially bladder and urethral cancer. Radiation therapy utilizes focused doses of high-energy radiation to kill or stop the growth of cancer cells. It can be applied from outside the body using a machine or from inside the body using a small piece of radioactive material that is surgically implanted directly in a tumor. The method used will depend on the type of cancer, where it is located, and its severity. Radiation therapy is sometimes used as a follow-up treatment after surgery, either on its own or in conjunction with chemotherapy. Radiation therapy is not often used to treat kidney cancer because that type of cancer is not very sensitive to radiation.

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