Treatment for anal cancer
Radiotherapy uses high energy x-rays to destroy cancer cells. It is a common treatment for anal cancer.
You usually have radiotherapy combined with chemotherapy (chemoradiotherapy) as your main treatment. But you might also have radiotherapy on its own for anal cancer that has spread elsewhere in the body (advanced anal cancer).
External radiotherapy is normally used to treat anal cancer. You have a planning appointment and a CT scan beforehand and will be told how to prepare for each treatment.
Radiotherapy for anal cancer can cause side effects. These may last a few months after treatment and include frequent loose poo (diarrhoea) and sore skin around the anus.
Radiotherapy for anal cancer can cause long term side effects. Some can start months or years after treatment. They are rare but your doctor or specialist nurse can help you manage them.
Last reviewed: 15 Aug 2025
Next review due: 15 Aug 2028
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