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Radiotherapy treats cancer by using high-energy rays to destroy the cancer cells, while doing as little harm as possible to normal cells.
Radiotherapy is rarely used to treat colon cancer except occasionally to relieve symptoms.
Our radiotherapy| section discusses the treatment and its side effects in more detail.
For answers, support or just a chat, call the Macmillan Support Line free (Monday to Friday, 9am-8pm)
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If you are diagnosed with colon or rectal cancer we have a pilot of a new online tool to help you make decisions about your treatment and care. Find out more|.
If you have any questions about cancer, need support or just want someone to talk to, ask Macmillan.