Breast cancer surgery
An overview of the operations used to remove breast cancer, from breast-conserving surgery (lumpectomy) to mastectomy, usually alongside checking the lymph nodes in the armpit.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Breast cancer surgery means either removing the cancer and keeping the breast (breast-conserving surgery) or removing the whole breast (mastectomy), usually with lymph node checks.
- For most early breast cancers, breast-conserving surgery plus radiotherapy works as well as mastectomy for survival — but neither can promise the cancer will never return.
- Surgery is one part of a plan decided by a multidisciplinary team; full pathology results take a week or two and may change what treatment you need next.
- Choose a breast surgeon working within a proper cancer team, and make sure you understand margins, lymph node plans, and what happens if more treatment is needed.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your surgeon will give you advice for your situation.
Removes the known cancer from the breast
Breast-conserving surgery may not be suitable if the cancer is large relative to the breast, involves more than one area, or cannot be removed with a...
Soreness and tiredness are normal. You may go home the same day after breast-conserving surgery, or stay one or more nights after mastectomy or...
A named breast care nurse and clear contact route for problems.
Soreness and tiredness are normal. You may go home the same day after breast-conserving surgery, or stay one or...
Wounds settle and any drains are usually removed. You will normally be told your pathology results at a follow-up...
Most people return to many normal activities, building up gentle arm and shoulder exercises. Heavier activity and...
Wounds are usually well healed. Further treatment such as radiotherapy, chemotherapy or hormone treatment may...
What is breast cancer surgery?
Breast cancer surgery means an operation to remove a cancer from the breast. There are two main approaches: breast-conserving surgery, which removes the cancer and a rim of normal tissue around it (a lumpectomy or wide local excision), and mastectomy, which removes the whole breast. Most operations also involve checking the lymph nodes in the armpit, because this helps work out whether the cancer has spread.
Surgery is usually one part of a wider plan. A multidisciplinary team (surgeons, oncologists, radiologists, pathologists and nurses) reviews your case and recommends the order of treatment. Some people have chemotherapy or hormone treatment before surgery; many have radiotherapy, hormone treatment or chemotherapy afterwards.
For most people with early breast cancer, large studies show that breast-conserving surgery followed by radiotherapy works as well as mastectomy for survival. The right choice depends on the size and position of the cancer, the size of your breast, whether there is more than one area, your own wishes, and whether you would need or want reconstruction.
Surgery aims to remove the cancer with clear margins (no cancer at the edge of what is removed). It cannot on its own guarantee the cancer will never come back, which is why the whole treatment plan matters.
Types & techniques
There isn't one single operation. The right approach depends on you — which is something to discuss with your surgeon.
Breast-conserving surgery vs mastectomy
| Point | Breast-conserving surgery | Mastectomy |
|---|---|---|
| Breast | Most of the breast is kept | Whole breast removed |
| Radiotherapy | Almost always needed afterwards | Sometimes needed, depending on findings |
| Survival (early cancer) | As good as mastectomy in large studies | As good as breast-conserving surgery |
| Re-operation | Sometimes needed if margins are not clear | Less often for margins |
| Reconstruction | Not usually needed | An option, immediate or delayed |
This is a general comparison. The right choice depends on your cancer, your breast, your wishes and your team's advice.
Preparing for your surgery
- Meet the operating surgeon and breast care nurse; make sure you understand which operation is planned and why.
- Ask whether any treatment (such as chemotherapy or hormone treatment) is recommended before surgery.
- Discuss lymph node plans — whether a sentinel node biopsy or clearance is planned, and what happens if nodes contain cancer.
- If a mastectomy is planned, ask about reconstruction options and timing before you decide.
- Tell the team about all medicines and supplements, especially blood thinners, and follow fasting instructions for general anaesthetic.
- Stop smoking as early as you can, as it raises wound-healing and reconstruction risks.
- Arrange time off, help at home, and a lift, as you should not drive straight after a general anaesthetic.
What happens
Most breast cancer operations are done under general anaesthetic. For breast-conserving surgery, the surgeon removes the cancer with a margin of normal tissue; if the cancer is hard to feel, a wire, marker or radioactive seed may be placed first to guide them.
If lymph node surgery is planned, a sentinel node biopsy uses a dye and/or a small amount of radioactive tracer to find the first nodes the breast drains to, which are removed and tested. If nodes are already known to contain cancer, an axillary clearance may be done instead.
For a mastectomy, the whole breast is removed; skin and sometimes the nipple can be preserved if reconstruction is planned. A thin drain may be left to remove fluid. Many people having breast-conserving surgery go home the same day, while mastectomy or reconstruction may mean one or more nights in hospital.
Is this operation 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…
- Breast-conserving surgery may not be suitable if the cancer is large relative to the breast, involves more than one area, or cannot be removed with a clear margin.
- Surgery alone is rarely the whole answer — some cancers are better treated with chemotherapy, hormone treatment or other treatment first.
- Very frail patients, or those with conditions that make a general anaesthetic risky, may need a modified plan discussed with the anaesthetist.
- Surgery does not treat cancer that has already spread elsewhere, where the focus may be on other (systemic) treatments.
Delay surgery if…
- There is an active infection or a major unmanaged health problem that makes anaesthetic unsafe.
- Key results (such as biopsy, receptor status or staging scans) or the multidisciplinary team plan are not yet complete.
- Treatment before surgery (such as chemotherapy or hormone treatment) is recommended first.
- Blood-thinning or other medicines need adjusting and cannot yet be safely managed.
- You do not feel you have had enough information to give informed consent.
Alternatives to discuss
- The other surgical option (mastectomy instead of breast-conserving surgery, or vice versa) where both are reasonable.
- Treatment before surgery, such as chemotherapy or hormone treatment, to shrink the cancer or change the plan.
- Radiotherapy, hormone treatment, chemotherapy or targeted treatment as part of, or instead of, an operation in selected cases.
- In some older patients with hormone-sensitive cancer, hormone treatment alone may be considered after discussion.
- A second opinion if you are unsure about the recommended operation.
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.
Anaesthetic choices
The safest option depends on the operation, your health, the facility and your surgeon/anaesthetist. Ask what is planned and why.
Benefits
- Removes the known cancer from the breast
- Provides tissue for pathology, which guides the rest of your treatment
- Breast-conserving surgery keeps most of the breast, with survival as good as mastectomy for early cancer
- Lymph node surgery helps stage the cancer and plan further treatment
- Reconstruction options can be discussed where a mastectomy is needed
Risks & complications
- Pain, bruising and swelling around the wound
- A fluid collection under the skin or in the armpit (seroma) that may need draining
- Changes to breast shape, size or symmetry
- Numbness or altered sensation in the breast, armpit or upper arm
- Wound infection needing antibiotics
- Bleeding or a blood collection (haematoma) needing attention
- Needing a further operation if the margin is not clear
- Shoulder stiffness or 'cording' (tight bands) in the armpit after node surgery
- Long-term arm swelling (lymphoedema), more likely after axillary clearance
- Blood clots in the leg or lung after surgery
- Problems related to the general anaesthetic
The biggest specific issues are whether the margins come back clear, what the lymph nodes show, and the risk of arm swelling after node surgery. Ask your surgeon what they will do if a margin is involved, how many nodes they expect to remove, and how this affects your lymphoedema risk.
Published figures to discuss
Outcomes and complication rates vary widely with the type of operation, the cancer, whether reconstruction or node clearance is done, and individual factors such as smoking, weight and other illnesses. Survival depends on the whole treatment plan, not surgery alone, so single numbers can mislead.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Re-operation for involved margins (breast-conserving surgery) | About 1 in 5 in an English hospital-episode study; modern unit rates often sit lower but vary with cancer type | Means a further operation, sometimes a mastectomy, if cancer reaches the edge of what was removed. | Survival after breast-conserving surgery vs mastectomy — PMCncbi.nlm.nih.govPublished figure |
| Seroma needing drainage | Common; published mastectomy seroma rates vary very widely, roughly 15–85% depending on definition | A fluid collection under the wound or in the armpit, more frequent after mastectomy and node clearance. | Survival after breast-conserving surgery vs mastectomy — PMCncbi.nlm.nih.govPublished figure |
| Long-term arm swelling (lymphoedema) | Low single figures after sentinel node biopsy; roughly 16–25% after axillary clearance in pooled data, higher with radiotherapy | See the axillary clearance guide for figures; depends on node surgery and any radiotherapy. | Survival after breast-conserving surgery vs mastectomy — PMCncbi.nlm.nih.govPublished figure |
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.
Recovery — what to expect, and when
Recovery depends on the operation. Breast-conserving surgery is often a quicker recovery than mastectomy, and adding reconstruction lengthens it further. Most people are told the final pathology results a week or two after surgery, which can be an anxious wait.
- Soreness, bruising and tightness around the wound that eases over weeks
- A firm, swollen area or seroma that gradually settles
- Numbness or odd sensations in the breast, armpit or inner arm
- Tiredness, and the emotional ups and downs of a cancer diagnosis
- A scar that is pink and firm at first and fades over months
Aftercare
- Take pain relief as advised and rest, building activity up gradually.
- Do the arm and shoulder exercises your team gives you to keep movement and reduce stiffness.
- Care for wounds and any drain as instructed, and keep follow-up appointments.
- Wear a supportive, non-wired bra if advised; your nurse can help with fitting.
- Watch for signs of infection, a growing seroma, or arm swelling and report them.
- Ask your team when you can drive, return to work and lift heavier things.
- Use the breast care nurse and support services — emotional support is part of good care.
- Front-opening tops and a soft, supportive bra
- Pain relief at home as advised
- Help at home for the first days, especially with lifting
- A lift home and someone to stay the first night after a general anaesthetic
- Breast care nurse and clinic out-of-hours numbers saved
- Time booked off work and follow-up appointment noted
Scars and how they heal
Scars depend on the operation. Breast-conserving surgery usually leaves a small scar on the breast; mastectomy leaves a longer scar across the chest, and reconstruction adds scars where tissue or implants are used. Scars are pink and firm at first and usually soften and fade over many months. Your surgeon should show you where scars are likely to be before you agree to surgery.
⚠ Get urgent help if…
- Spreading redness, heat, increasing pain or pus from a wound (possible infection)
- A rapidly growing, tense swelling at the wound or armpit
- Bleeding that soaks through dressings and does not settle
- A hot, swollen or painful calf, or breathlessness or chest pain (possible clot) — seek urgent help
- Fever or feeling generally unwell after surgery
- New or worsening arm swelling, heaviness or tightness
Who to contact: your surgeon or clinic 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 surgeon gives you.
Results & realistic expectations
A good surgical result means the cancer has been removed with clear margins and the lymph nodes have been assessed. The full picture comes from the pathology report a week or two later, which describes the cancer type, size, grade, margins and node status, and from any extra tests on the tissue.
These results, reviewed by the multidisciplinary team, decide what treatment you may need next — such as radiotherapy, chemotherapy, hormone treatment or targeted treatment. Successful surgery lowers the risk of the cancer coming back but cannot promise a cure, which is why follow-up and the rest of the plan are so important.
Surgery removes the cancer that is there now, but breast cancer can sometimes return in the breast, chest wall or elsewhere, even years later. The chance of this depends on the cancer's features and the whole treatment plan, not surgery alone. Ongoing follow-up, breast awareness and any recommended scans or mammograms help pick up problems early.
Combining with other procedures
Breast cancer surgery is usually combined with other treatments in a planned order — for example chemotherapy or hormone treatment before surgery, and radiotherapy, hormone treatment, chemotherapy or targeted treatment afterwards. Mastectomy may be combined with reconstruction. Your team will explain how the parts fit together.
Follow-up & long-term care
You will normally be seen within a week or two to discuss pathology results and the next steps, with further appointments through your treatment. Longer-term follow-up usually includes regular review and surveillance mammograms. You should be given a named contact, often a breast care nurse, for questions or concerns.
- Attend follow-up appointments and any recommended surveillance mammograms
- Continue hormone or other ongoing treatment if prescribed, and report side effects
- Stay breast-aware and report any new changes promptly
- Keep up arm and shoulder exercises, and seek early help for any arm swelling
Revision and secondary surgery reality
- Breast-conserving surgery sometimes needs a second operation, occasionally a mastectomy, if the margin is not clear.
- Symmetry or scar revision may be discussed later, especially after reconstruction.
- Some people choose risk-reducing surgery to the other breast after counselling, particularly with certain genetic risks.
Ask your surgeon for their own revision rate, what counts as a revision, and what is included in the written aftercare policy.
What good aftercare looks like
- A named breast care nurse and clear contact route for problems.
- A clear plan for receiving pathology results and the multidisciplinary team's recommendations.
- Arm and shoulder exercises, and prompt referral if lymphoedema is suspected.
- Joined-up planning for any radiotherapy, chemotherapy, hormone or targeted treatment.
- Access to emotional and practical support, not just wound checks.
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 operation (breast-conserving surgery, mastectomy, or surgery with reconstruction)
- Whether reconstruction is done, and whether by implant or your own tissue
- Lymph node surgery (sentinel node biopsy or axillary clearance) and any tracer/markers used
- Surgeon and anaesthetist fees, theatre time and length of hospital stay
- Pathology, imaging and any extra tumour tests on the tissue
- Follow-up appointments, breast care nurse support and management of any complications
- The surgeon's and anaesthetist's fees and theatre/facility costs
- Whether reconstruction and lymph node surgery are included or charged separately
- Pathology and imaging costs, including any extra tumour tests
- Follow-up appointments and breast care nurse support
- What happens — and what it costs — if you need a further operation or treat a complication
- How your care links with NHS or oncology services for radiotherapy, chemotherapy or hormone treatment
On the NHS? Breast cancer surgery is a core NHS treatment delivered by specialist teams; private care may be chosen for speed, choice of surgeon or a second opinion, but should meet the same clinical standards.
You're entitled to your total cost in writing — including aftercare and any revision — 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
- Not discussing both surgical options, or the role of treatment before or after surgery.
- Glossing over what happens if margins are involved or lymph nodes contain cancer.
- Not explaining the risk of arm swelling before node clearance.
- Implying surgery alone is a cure, without the wider plan or follow-up.
- Deciding about reconstruction without time to consider the options.
Marketing red flags
- Any promise of a guaranteed cure or that the cancer will never come back.
- Pressure to choose a particular operation quickly without a multidisciplinary discussion.
- Claims of 'scarless' breast cancer surgery.
- Downplaying lymph node, margin or further-treatment issues to make the operation sound simpler than it is.
Choosing a surgeon safely
- Check your surgeon is on the GMC Specialist Register for this area.
- Make sure they practise at a CQC-registered location, and look for membership of bodies like BAAPS or BAPRAS.
- You're entitled to a two-stage consent process with time to reflect (a cooling-off period). The surgeon who will operate must consent you — not a salesperson.
- Be wary of pressure: time-limited offers, discounts 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 aftercare and any revision — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good surgeon will welcome every one of these.
- Which operation are you recommending for me, and why this one rather than the alternative?
- What will you do if the margins are not clear or the lymph nodes contain cancer?
- How many lymph nodes do you expect to remove, and how does that affect my risk of arm swelling?
- Is any treatment recommended before surgery, and what is likely to be needed afterwards?
- If I am having a mastectomy, what are my reconstruction options and the timing?
- Who is my named contact, and how do I reach the team if I am worried after surgery?
- 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 surgeon who carries out my operation, 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 operation 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 breast cancer surgery available on the NHS?
Is keeping my breast as safe as removing it?
Will I definitely need radiotherapy or chemotherapy?
How long until I get my full results?
Can the cancer come back after surgery?
Do I have to decide about reconstruction now?
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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: NHS — Breast cancer in women: treatment NHS — Mastectomy Cancer Research UK — Breast cancer surgery Breast Cancer Now — Surgery for primary breast cancer NICE NG101 — Early and locally advanced breast cancer Survival after breast-conserving surgery vs mastectomy — PMC Reoperation rates after breast-conserving surgery for breast cancer in England — BMJ/PMC Postoperative seroma management — StatPearls/NCBI
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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