Tumour ablation (heat treatment)
A keyhole, image-guided treatment that destroys a small tumour with heat, using a needle-like probe passed through the skin, most often in the liver or kidney.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Tumour ablation destroys a tumour with heat through a needle-like probe passed through the skin, most often in the liver or kidney.
- For small tumours it can be a curative treatment and an alternative to surgery; for others it is used to control the cancer.
- It works best on smaller tumours and is less suitable for large ones or widespread cancer, and is decided by a specialist team.
- A flu-like reaction and some pain at the probe site for a few days are common, and a follow-up scan checks the tumour was destroyed.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your radiologist will give you advice for your situation.
Can destroy a small tumour completely, sometimes with the aim of cure
Large tumours, or cancer that has spread widely, where ablation is unlikely to control the disease.
You are asleep under general anaesthetic, or relaxed with sedation and local anaesthetic. The skin puncture is numb.
Clear pain relief and advice on managing post-ablation syndrome.
You are asleep under general anaesthetic, or relaxed with sedation and local anaesthetic. The skin puncture is...
You rest in bed, often around four hours, while staff watch for bleeding and check the treated area. Pain relief...
Pain at the site and flu-like symptoms with mild fever are common as the treated tissue settles. Most people are...
Many people return to normal activities, avoiding heavy lifting and strenuous exercise at first, and following...
What is tumour ablation?
Tumour ablation means destroying a tumour in place, usually with heat, rather than cutting it out. A doctor called an interventional radiologist passes a thin needle-like probe through the skin and into the tumour, guided by ultrasound or a CT scan. The probe heats the tumour with either radiowaves (radiofrequency ablation, RFA) or microwaves (microwave ablation, MWA) until the cancer cells are destroyed, while sparing most of the healthy tissue around it.
It is used most often for small tumours in the liver or kidney, and sometimes in the lung or other sites. For small tumours it can be a curative treatment, meaning it aims to destroy the cancer completely, and is sometimes an alternative to surgery for people who are not fit for an operation or have tumours in awkward places. In other situations it is used to control the cancer or treat a limited number of spots.
There is no large surgical cut, only one or more small skin punctures numbed and treated under sedation or a general anaesthetic. It works best on smaller tumours (often under about 3 cm) and is less suitable for large tumours or cancer that has spread widely. The decision is made by a specialist cancer team (a multidisciplinary team, or MDT).
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Ablation vs surgery for a small tumour
| Point | Thermal ablation | Surgery |
|---|---|---|
| Approach | Probe through the skin | Operation to remove tissue |
| Best for | Small tumours, often under 3 cm | Many sizes, if fit for surgery |
| Anaesthetic | Sedation or general | General anaesthetic |
| Recovery | Often about a week | Usually longer |
Ablation and surgery are not always interchangeable; the right choice depends on the tumour and your health, and is decided by a specialist team.
Preparing for your procedure
- Your case is discussed by a specialist cancer team, who confirm ablation is suitable and explain whether the aim is to cure or to control.
- Tell the team about allergies, especially to contrast dye, and about asthma.
- Blood tests check your clotting, and your kidney and (for liver tumours) liver function.
- List all your medicines, including blood thinners, as some are paused beforehand.
- You will usually be asked not to eat for several hours, especially if a general anaesthetic is planned.
- Arrange a lift home and support for the first day or so, and about a week off normal activities.
- Tell the team if you are or might be pregnant, as a CT scan uses X-rays.
What happens
You either have a general anaesthetic, so you are asleep, or sedation with local anaesthetic and strong pain relief. You lie on the scanner table and the radiologist uses ultrasound or CT pictures to find the tumour and guide the probe through the skin into it.
Once the probe is correctly placed, it is switched on and the tumour is heated for a set time to destroy the cancer cells. The radiologist may treat the tumour from more than one position to make sure all of it is covered. The scan is used throughout to check the position.
The probe is removed and a small dressing is applied. You rest in bed for a few hours so staff can watch for bleeding and check the area. Most people stay overnight and go home the next day. A scan a few weeks later checks that the whole tumour has been destroyed.
Is this procedure right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Large tumours, or cancer that has spread widely, where ablation is unlikely to control the disease.
- Tumours sitting too close to vital structures such as the bowel, bile ducts or major vessels to treat safely.
- A bleeding tendency or blood-thinning that cannot be safely adjusted.
- When surgery, TACE or systemic treatment would offer a better outcome for you.
Delay or rearrange if…
- You have an active infection or are generally unwell.
- Your clotting, liver or kidney blood tests need optimising first.
- Blood thinners have not been adjusted or recent results are missing.
- You might be pregnant, as CT guidance uses X-rays.
- Your case has not yet been discussed by the specialist cancer team.
Alternatives to discuss
- Surgery to remove the tumour in people fit for an operation.
- TACE or radioembolisation for some liver tumours.
- Active surveillance for very small, slow-growing tumours in selected patients.
- Systemic cancer drugs if the cancer has spread.
- Best supportive care focused on symptoms if active treatment is not appropriate.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Comfort, sedation or contrast choices
If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.
Benefits
- Can destroy a small tumour completely, sometimes with the aim of cure
- Spares most of the healthy tissue around the tumour
- Can be an option for people who are not fit for surgery
- Avoids a major operation and a large surgical wound
- Usually a shorter recovery than surgery for the same tumour
- Can be repeated if new tumours appear
Risks & complications
- Pain or discomfort at the probe site and in the treated area for a few days
- Flu-like symptoms a few days afterwards with mild fever and feeling unwell (post-ablation syndrome), often for 1 to 2 weeks
- Bruising or a small amount of bleeding at the skin puncture
- Tiredness for several days
- Bleeding from the organ where the probe was placed, occasionally needing treatment
- Infection in the treated area, sometimes forming a collection (abscess)
- Temporary upset of liver or kidney blood tests
- The tumour not being fully destroyed, needing a repeat treatment
- Damage to nearby structures, such as the bile ducts, bowel, gallbladder or the tube from the kidney (ureter)
- A collection of fluid or air around the lung if a chest tumour is treated
- Significant bleeding needing a blood transfusion or further procedure
- Very rarely, a life-threatening complication
The main uncertainties are whether the whole tumour can be safely reached and destroyed, and whether nearby structures, such as the bowel, bile ducts or ureter, are close enough to be at risk. This depends on the size and position of the tumour. Ask your team whether the aim is cure or control, how likely complete destruction is for your tumour, and what would happen if some tumour remained.
Published figures to discuss
Success and complication rates depend strongly on the size and position of the tumour, the organ treated and the experience of the team, so reliable single percentages are not quoted here. Ablation works best on small tumours, and complete destruction is more likely the smaller the tumour. Post-ablation syndrome is common.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Post-ablation syndrome | Common after treatment, especially of larger areas | Flu-like illness with mild fever and tiredness, usually settling within 1 to 2 weeks. | Guide sourcesClinical context |
| Incomplete destruction of the tumour | More likely with larger tumours (often above about 3 cm) | May need a repeat ablation or a different treatment; checked on the follow-up scan. | NICE - Microwave ablation for treating liver metastases (IPG553)nice.org.ukSource-linked context |
| Bleeding, infection or injury to nearby organs | Uncommon, varying by organ and tumour location | Lung, liver, kidney and bone ablations have different risk profiles. | NICE - Microwave ablation for treating liver metastases (IPG553)nice.org.ukSource-linked context |
| Pneumothorax after lung ablation | Common enough to discuss specifically; only a minority need a chest drain | Breathlessness or chest pain after lung ablation should be reported promptly. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no large wound to heal, only one or more small skin punctures, but the treated area needs time to settle and a flu-like reaction is common. Most people stay overnight and are back to normal activities in about a week.
- Aching or soreness in the treated area for a few days
- Flu-like symptoms with mild fever and tiredness for up to a week or two
- Bruising at the skin puncture that fades over a week or two
- Waiting a few weeks for the scan that confirms the result
Aftercare
- Take the pain relief you are given; some soreness and a flu-like feeling are expected.
- Keep the puncture site clean and dry and leave the dressing on as advised.
- Avoid heavy lifting and strenuous activity for about a week, and follow advice on driving.
- Drink plenty of fluids, unless told otherwise.
- Watch for a high or persistent fever, which can signal infection and should be reported.
- Restart paused medicines, such as blood thinners, only when told to.
- Attend the follow-up scan and clinic so your result and next steps are reviewed.
- A lift home and support for the first day after a general anaesthetic
- Pain relief collected and understood
- About a week off work or heavy activity arranged
- The cancer team or unit contact number for fever, severe pain or bleeding
- A note of which medicines to stop and restart and when
- The date of the follow-up scan and clinic appointment
⚠ Get urgent help if…
- A high fever, shivering or feeling very unwell (possible infection or abscess)
- Severe or worsening pain not controlled by your usual pain relief
- Signs of bleeding such as feeling faint, a racing heart or increasing tummy pain or swelling
- Breathlessness or chest pain, especially after a lung tumour was treated
- Yellowing of the skin or eyes after a liver tumour was treated
- Spreading redness, heat or discharge at the puncture site
- Blood in the urine that is heavy or persistent after a kidney tumour was treated
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your radiologist gives you.
Results & realistic expectations
A good result means the whole tumour has been destroyed, which is checked on a scan a few weeks later. For small tumours, ablation can be a curative treatment, aiming to clear the cancer completely, and can work as well as surgery for selected small tumours.
It is not always successful in one go: a small amount of tumour can be left behind, and new tumours can appear elsewhere, especially in the liver. If that happens, ablation can often be repeated or another treatment used. Your team will be honest about whether the aim is to cure the cancer or to control it, and about the chance of the tumour coming back.
How long the benefit lasts depends on the type, size and number of tumours and on the underlying disease. For a small, completely destroyed tumour the result can be lasting, but the cancer can return in the same organ or elsewhere, so regular scans are used to watch for new tumours. Ablation can often be repeated if needed, as part of a longer-term plan.
Related tests, treatments or support
Ablation is often combined with other treatments. For liver tumours it may be used with TACE or surgery; in the kidney or lung it may be used alone or with other approaches. It can also treat a new tumour that appears after earlier surgery or treatment. The specialist team decides how best to combine treatments.
Follow-up & long-term care
You stay under a specialist cancer team. A scan a few weeks after ablation checks the tumour has been destroyed, and regular scans afterwards watch for any return. Further ablation or other treatment is planned from these results. Report fever, severe pain, bleeding or breathlessness straight away.
- Regular scans to check the treated tumour and look for new ones
- Repeat ablation if a new or residual tumour is found, where suitable
- Ongoing liver or kidney blood tests as relevant
- Review within the cancer team to adjust the longer-term plan
Repeat, follow-on and what comes next
- Ablation may need repeating if some tumour remains or a new one appears.
- It is often combined with surgery, TACE or systemic treatment over time.
- Larger tumours are less likely to be fully destroyed in one session.
- Regular scans guide whether further treatment is needed.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Clear pain relief and advice on managing post-ablation syndrome.
- Written warning signs and a named contact for fever, severe pain, bleeding or breathlessness.
- A planned follow-up scan to confirm the tumour was destroyed.
- Ongoing monitoring within the cancer team, with repeat treatment offered if needed.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- The type of ablation (radiofrequency or microwave) and the number of tumours treated
- Whether a general anaesthetic or sedation is used
- Imaging guidance (ultrasound or CT) and the probes used
- The hospital stay and monitoring afterwards
- Follow-up scans to confirm the tumour was destroyed
- The interventional radiologist's fee, the facility fee and the wider cancer team's input
- The interventional radiologist's fee and the facility fee
- Anaesthetic or sedation, probes and contrast dye
- The expected hospital stay
- Follow-up scans and clinic reviews to confirm the result
- What happens, and what it costs, if a repeat ablation or other treatment is needed
- What is covered if a complication needs further care
On the NHS? Tumour ablation is available on the NHS for suitable patients when a specialist cancer team recommends it; private treatment is sometimes used for speed or choice, but the same selection should apply.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Presenting ablation as a guaranteed cure rather than honestly stating the aim and the chance of recurrence.
- Not explaining post-ablation syndrome and the possible need for repeat treatment.
- Not discussing the risk to nearby structures such as the bowel, bile ducts or ureter.
- No discussion of alternatives such as surgery, TACE or surveillance.
- No written warning signs for fever, severe pain, bleeding or breathlessness.
Marketing red flags
- Promising a guaranteed cure or that ablation always beats surgery.
- Offering ablation without a specialist cancer team's involvement.
- Downplaying the chance of incomplete treatment or recurrence.
- Not mentioning the risk to nearby organs or the need for follow-up scans.
Choosing a specialist safely
- Check the radiologist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the radiologist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good radiologist will welcome every one of these.
- Is the aim to cure my cancer or to control it?
- How likely is it that the whole tumour will be destroyed in one treatment?
- Is my tumour close to anything, such as the bowel, bile ducts or ureter, that could be at risk?
- Would surgery be a better option for me, and why?
- What happens if some tumour is left behind or a new one appears?
- Will I have a general anaesthetic or sedation, and what is the recovery like?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the radiologist who carries out my procedure, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this procedure not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Is tumour ablation available on the NHS?
Can ablation cure my cancer?
Is it better than surgery?
Why do I feel unwell afterwards?
Will the cancer come back?
How long will I be in hospital?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: Cancer Research UK - Thermal ablation for liver cancer Cancer Research UK - Microwave and radiofrequency ablation for kidney cancer NICE - Microwave ablation for treating liver metastases (IPG553) Cancer Research UK - Radiofrequency ablation BSIR - What is interventional radiology?
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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