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Front view of a CT scanner with a padded table extending towards the viewer.

This leaflet gives you information about having a CT ablation.

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A speech bubble containing a question mark.

If you don’t think you should be having this treatment, please contact the CT Department.

If you haven’t had a copy already, please ask for the ‘Having a CT scan of the body’ leaflet. This will tell you more about CT scans and what to expect.

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Silhouette of human body with magnified view of cancer cell.

What is a CT ablation?

An ablation is where small needles are put into a tumour in your body and heated up (microwave ablation) or made very cold (cryoablation) which helps to kill the cancer cells. The needles are very small.


Sometimes the needles have to be moved to different positions to kill all the cells.


The CT scanner helps us put the needles in the right place in your body.

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Patient lying on a CT scanner table with two medical professionals standing nearby.

Why do I need an ablation?

You need an ablation because you have a tumour that needs either heat or cold to kill the cancer cells.

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Two men, one in a white shirt and one in a blue fleece jacket, having a friendly conversation.

Getting ready for your biopsy

Before your biopsy you will talk to health staff about what will happen. This might be an appointment or on the phone.


You will need to tell us about any medication you take.

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A medical professional in green scrubs administering anaesthesia to a patient.

Health staff will talk to you about the anaesthetic in case there is anything they need to be aware of.

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Hands holding a blue pill organiser and three pills.

If you have medication to thin your blood you might have to stop taking them before your biopsy.


We will tell you if you need to stop your medication.


You should carry on taking your other medication unless we tell you not to.

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Sandwich with red cross and clock showing 6 hours

Please do not eat anything for 6 hours before your appointment time.

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Person in a grey hoodie packing clothes into a blue duffel bag.

You will need to stay in hospital overnight so please bring your overnight things with you.

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Woman opening the driver's side door of a small red car.

You will not be able to drive for a couple of days so make sure you have someone to pick you up.

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Patient lying on a CT scanner table with two medical professionals standing nearby.

What happens during the ablation?

You will go to the scanning room and have an anaesthetic, so you go to sleep.


A scan will be done to check where to put the needles.


Your skin will be cleaned before the needles go in.


The needles are put into the tumour.


Another scan checks how the tumour looks after the ablation.


You will be asleep so you will not feel anything. There might be a small ache afterwards.

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Man lying in a hospital bed with white sheets.

How long will it take?
Everyone is different.

You will be looked after in the Radiology department after your treatment.

When you feel well enough, you will go to a ward and stay in hospital for 24 hours.


Your wounds will be checked and another scan will be arranged to check how things are.

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Person in a pink robe lying on white pillows with a grey blanket.

How will I feel after the ablation?

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A young person relaxing in a yellow armchair with a lavender hoodie.

You might feel a bit poorly for a couple of days.


You need to rest at home for the next couple of days.

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Young person with glasses holding purple dumbbells and smiling with a red cross

You might have to avoid heavy work or exercise for a week depending on where your ablation was.

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Man eating a sandwich with a plate of French fries in front of him.

You can eat and drink normally after the ablation.

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Two brown glass prescription bottles with gray caps in front of a white and blue box.

You might feel a bit uncomfortable, but you can take pain relief for this.


You will have antibiotics to take after your ablation. You will be asked to take them for up to a week.

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A close-up photo of a beige adhesive bandage with perforations.

The needles only make a small hole which will be covered with a plaster.


You can take the plaster off after a couple of days.

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A close-up photo of a hand and wrist with a significant dark purple and red bruise.

There might be pain and bruises which should go away after a few days. You can take paracetamol.

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A person in a striped shirt thinking with a checkmark and an 'X' in a thought bubble.

What are the risks?
This depends on where the ablation is in your body, these are some of the things that might happen.

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Person's chest with an illustration of lungs overlaid.

There could be a leak in your lung, if this happens while you are hospital it might mean you have to stay a bit longer.

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A hand holding a blister pack of ten white round tablets and two cold packs

There could be a blood clot called a haematoma which might cause some swelling and pain.


You can use an ice pack and take paracetamol to help with this.


If it does not go away over the next few days phone the Radiology Nurses.

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A man in a blue shirt and glasses clutching his stomach in discomfort.

If you have very bad bruising and are feeling weak and sick, this is very rare. You might need a small procedure to stop the bleeding: Contact the Radiology Nurses or phone NHS111.


There could be damage to skin, muscles, or nerves near where the needles went in, this is rare.


Sometimes other organs like the bowel might be damaged and might mean an operation but it is rare.

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Person clutching their chest with a pained expression, standing against a white background.

When you get home


If there is bleeding or anything else coming from where the needles went in, contact your doctor or NHS111.


If you have pains in your chest, find it hard to breathe or cough up blood go to A & E straight away.

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Man lying in a hospital bed with white sheets.

Sometimes a tumour can’t be fully treated, and you may need another appointment.

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Calendar with a clock showing 2:00 and a question mark.

When will I get the results?


A follow up appointment will be made when you are discharged.

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Elderly woman in a light blue sweater smiling and touching her head.

Do I have to have an ablation or is there something else?


You do not have to have an ablation.


We can check on your tumour with scans, but it might mean things get worse because there is a delay in your treatment.


It might be possible to have surgery instead.

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Woman raising her arm with a speech bubble containing a question mark.

Ask 3 questions

If you are asked to make a choice about your health, you may have lots of questions you want to ask.

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Four people having a conversation with speech bubbles overhead.

You might want to talk to other people about your choices.

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Man in a red sweatshirt writing notes at a table with a pen and paper.

It can help if you make a list of your questions and take it with you to your appointment.

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Two men shaking hands with a speech bubble above them.

To begin with try to make sure you get the answers to these 3 questions, if you are asked to make a choice about your healthcare:


What are my choices?


What are the good things and not so good things about each choice?


How do I get help so I can make a choice that is right for me?

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Two women on phone calls; one in a floral top smiling, the other in the background focused.

How to contact us

You can contact us on the number in your appointment letter.

You can contact your consultant’s secretary.


You can contact one of the Cancer Nurse Specialists Cheltenham General Hospital 0300 422 2379


Gloucestershire Hospitals Switchboard 0300 422 2222 Ask for the operator and then ask them to bleep the Cancer Nurse Specialist on 2649.

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Smartphone with a download icon next to a PDF document.

Download the leaflet

Easy Read - Having a CT ablation GHPI1803_09_23

Review due: September 2026