What are the benefits of radiotherapy?

Radiotherapy. It does decrease chances of local recurrence. Some times use for relieving pain.
Kills cancer cells. Radiation therapy is a treatment that is used to kill cancer cells. It involves the use of high-energy x-rays to create damage to the dna of cancer cells. Approximately 50% of all patients with cancer will receive radiation as a part of their treatment. Learn more about radiation here: http://www.Cancer.Gov/cancertopics/factsheet/therapy/radiation.