What is radiotherapy?

You might have radiotherapy as a treatment for cancer. Read about what it is and how it works.

Having radiotherapy

Find out about when you might have radiotherapy, who gives it and where you have it. And about having radiotherapy if you have a pacemaker. 

External radiotherapy

External radiotherapy targets radiation at the cancer from a radiotherapy machine. Read about types of external radiotherapy and what happens during planning.

Internal radiotherapy

Internal radiotherapy means having radiation treatment from inside the body. Read more about what it is and how you have it, including treatment with radioactive implants and radioactive liquid.

Radiotherapy to relieve symptoms

Radiotherapy to treat symptoms and improve quality of life is called palliative radiotherapy.

Radiotherapy side effects

Radiotherapy can cause different side effects depending on which part of the body is being treated. Find out what these side effects are and how they affect you during and after treatment.

Research and clinical trials

All cancer treatments have to be fully researched before they can be used for everyone. This is so we know that they work, they are better than the treatments already available and they are safe.

Last reviewed: 
14 Dec 2018

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