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

Find out about when you might have radiotherapy, who gives it and where you have it.

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

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

Radiotherapy can cause different side effects when it treats different areas of the body. Find out what these side effects are and how they affect you during and after treatment.

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.