Radiotherapy for pancreatic cancer

Radiotherapy may be used on its own or together with chemotherapy to control the cancer and relieve symptoms.

What is radiotherapy?

Radiotherapy uses radiation to destroy cancer cells.

A machine called a linear accelerator is usually used to deliver radiotherapy for pancreatic cancer. This directs beams of radiation at the cancer from outside the body, destroying the cancer cells.

If you have pancreatic cancer, you may have radiotherapy on its own, or together with chemotherapy. This is called chemoradiotherapy.

Who can have radiotherapy?

Radiotherapy is used in different ways, depending on your diagnosis. It may be used after, and occasionally before, surgery to remove the cancer.

  • Borderline resectable pancreatic cancer is cancer that has grown very close to the major blood vessels near the pancreas. Chemotherapy together with radiotherapy (chemoradiotherapy), or more rarely, radiotherapy on its own may be suitable for some people with borderline resectable cancer. The aim is to shrink the cancer enough to make it possible to remove it with surgery.
  • Locally advanced pancreatic cancer is cancer that has spread to the large blood vessels near the pancreas, or the stomach, spleen or large bowel. If you have locally advanced cancer, you may be offered chemoradiotherapy. Chemoradiotherapy may help control the cancer and slow down its growth. Another option may be a type of radiotherapy called SABR (stereotactic ablative body radiotherapy), which is very precise radiotherapy that delivers higher doses of radiation in a shorter time.
  • If you have cancer that has spread to other parts of the body (advanced or metastatic cancer) it can cause pain. You may be able to have radiotherapy to help the pain. This is called palliative radiotherapy.

How will I have radiotherapy?

You will normally have a planning session before your radiotherapy starts, so that the radiotherapy team can make a treatment plan for you. You will have a scan, and the radiographers will make tiny permanent dots (tattoos) on your skin. They will use these dots to get you into exactly the right position for each treatment session.

You will usually go to the hospital Monday to Friday for your radiotherapy. Treatment normally lasts three to six weeks, although this varies. The treatment session may take up to 30 minutes each time.

The radiographers will position you on the radiotherapy table (often called a couch). The radiotherapy machine will move around you during treatment, but won’t touch you.

You will usually have scans or X-rays taken while you are having radiotherapy to check that you are in the right position during treatment. You can go home as soon as each treatment session has finished.

Read more about how radiotherapy is given.

How will I have chemoradiotherapy?

If you are having chemoradiotherapy, you will usually have chemotherapy on its own for three to six months to begin with. You will then have a CT scan. If this shows that the cancer has not grown, you will have radiotherapy and chemotherapy every day from Monday to Friday, for five to six weeks.

The chemotherapy drug most often used with radiotherapy is capecitabine, which is taken as a tablet.

Are there any side effects?

Radiotherapy and chemoradiotherapy can cause some short and longer-term side effects but these are often mild. Side effects include:

  • fatigue (extreme tiredness)
  • feeling and being sick (nausea and vomiting)
  • runny poo (diarrhoea)
  • skin changes.

If you have chemoradiotherapy, you may also get side effects from the chemotherapy.

Your medical team will carefully plan your treatment to reduce the risk of any side effects, and there are ways to manage side effects.

Questions about radiotherapy?

If you have any questions about radiotherapy speak to your doctor or nurse. You can also speak to our specialist nurses on our free Support Line.

Speak to our nurses
A specialist nurse taking a phone call.

Questions to ask your doctor or nurse

You might want to write down any questions you have for your doctor to take with you so you don’t forget to ask them. You may also want to take someone with you when you see your doctor so they can write down the answers and any important information.

  • Why is radiotherapy recommended for me?
  • Will radiotherapy help control my cancer?
  • Will radiotherapy help me to live longer?
  • Will radiotherapy make surgery more likely?
  • Will radiotherapy help any of my symptoms?
  • Will I have chemotherapy as well as radiotherapy?
  • What side effects might I get?
  • How long will the side effects last?
  • How can the side effects be managed?
  • Who do I contact if I have side effects?
  • Which hospital will I go to for radiotherapy?
  • Can I have radiotherapy closer to where I live?
  • Are there any clinical trials involving radiotherapy or chemoradiotherapy that I could take part in?
  • Are there any other treatment options that would be suitable for me?

Read our fact sheet about radiotherapy

To read more about radiotherapy, download our fact sheet, Radiotherapy for pancreatic cancer.

Download our fact sheet
An image of the front cover of Pancreatic Cancer UK's fact sheet on radiotherapy for pancreatic cancer

Published September 2019

To be reviewed September 2021

This information is currently under review.



References and acknowledgements


If you would like the references to the sources used to write this information, email us at


We would like to thank the following people who reviewed our information on radiotherapy.

  • Andrew Bateman, Consultant Clinical Oncologist, University Hospital Southampton
  • Catriona Buchan, Radiotherapy Advanced Practitioner (Pre Treatment), St James’ Institute of Oncology, Leeds
  • Mark Collins, Academic Delivery Manager, Department of Allied Health Professions, Sheffield Hallam University
  • Maria Hawkins, Associate Professor in Clinical Oncology, University College London, London
  • Ganesh Radhakrishna, Consultant Clinical Oncologist, The Christie NHS Foundation Trust, Manchester
  • Pancreatic Cancer UK Lay Information Reviewers
  • Pancreatic Cancer UK specialist nurses