What is a double mastectomy?
If you have been told a mastectomy may be needed, a double mastectomy in London means surgery to remove both breasts, also called bilateral mastectomy. It may be part of breast cancer treatment or a risk-reducing operation for someone at high risk, and the reason matters more than the label.
That label does not tell us the whole plan. One patient may need a simple mastectomy, where breast tissue is removed without reconstruction. Another may be assessed for a skin-sparing or nipple-sparing mastectomy, where some skin, and in selected cases the nipple, may be kept as part of a reconstruction plan.
Removing both breasts is also a different decision from removing one breast. We start by asking why both breasts are being considered: known cancer, future risk, or uncertainty after mixed advice. The phrase describes the extent of breast removal, while the clinical indication decides whether it is reasonable.
Both breasts are not always the better operation
More surgery does not automatically mean a better cancer plan. When cancer is only in one breast, the question is whether the other breast has its own clinical risk reason for surgery.
Before we support a bilateral mastectomy decision, we want the facts in front of us. The diagnosis, biopsy result, imaging, tumour extent, family history and genetic risk all matter. For invasive breast cancer, markers called oestrogen receptor, progesterone receptor and HER2, often written as ER, PR and HER2, help guide the wider treatment plan.
NICE guidance does not make breast MRI routine before surgery for biopsy-proven invasive breast cancer or ductal carcinoma in situ, known as DCIS. MRI is used for specific reasons, such as unclear disease extent or difficult assessment on standard imaging. That distinction matters, because a bigger operation should not be based on a vague sense that more information must exist somewhere.
At D B Ghosh Breast Surgeon Specialist in Cancer and Cosmetic Surgery, we approach this as a surgical decision, not a default preference. A second opinion is useful when the choice has become blurred between treating the known cancer, reducing future risk and responding to understandable fear.
The main pathways need different evidence:
| Situation | What the decision usually needs to clarify |
|---|---|
| Cancer in one breast | Whether the other breast has a clinical or genetic risk reason for surgery |
| Cancer in both breasts | How each breast is being treated and reconstructed |
| High inherited or family risk | Whether risk-reducing surgery is appropriate after genetic and multidisciplinary team review |
| Unclear advice or mixed recommendations | Whether a second opinion can clarify the surgical choices |
Breast-conserving surgery, sometimes called a lumpectomy or wide local excision, may still be suitable for some people. Further surgery can be needed if the margin result shows cancer cells too close to the edge of the removed tissue, including what specialists call tumour on ink. That can lead to re-excision or mastectomy, depending on the pathology and the wider plan.
Expert advice on breast cancer treatment, cosmetic breast surgery, and reconstruction options in London.
Book a ConsultationRisk-reducing surgery needs stronger proof
Risk-reducing double mastectomy is a separate pathway from cancer treatment. NICE says bilateral risk-reducing mastectomy is appropriate only for a small proportion of women from high-risk families, and it should be managed by a multidisciplinary team, often shortened to MDT.
A strong family history deserves serious assessment. Preventive surgery reduces risk, but we do not describe it as removing risk completely. The decision needs proof, proportion and time for proper counselling.
Before bilateral risk-reducing mastectomy is agreed, we look for the safeguards that make the decision clinically sound:
- Genetic counselling before the decision is made, usually through a specialist cancer genetic clinic.
- Whether a BRCA1 or BRCA2 gene change is known. These genes can be linked with inherited breast cancer risk.
- Family history needs checking where no gene change has been found.
- MDT agreement is needed where the risk picture is difficult to interpret.
- Counselling should cover body image, sexual consequences, reconstruction choices and the option of going flat.
Reconstruction planning belongs in the same conversation. Immediate reconstruction means starting reconstruction in the same operation as mastectomy. Delayed reconstruction means doing it later in a separate operation. Some people prefer no reconstruction, and that choice should be discussed plainly rather than treated as a fallback.
Bring your biopsy report, imaging results and any genetic test information to the consultation. That helps the surgeon assess whether the operation is about cancer treatment, risk reduction, or both.
The operation is a plan, not a single step
What happens in theatre is only one part of the operation. A double mastectomy plan also covers the type of breast removal, lymph node assessment, reconstruction timing and the practical recovery period afterwards.
Before and during surgery, each part of the plan is checked
Before a mastectomy, you will usually have a pre-operative appointment a few days or weeks before surgery. Checks may include blood tests, X-rays or an electrocardiogram, which records the electrical activity of the heart. The operation is done under general anaesthetic, so you are asleep during surgery.
NHS patient guidance says a double mastectomy can take around 3 hours, and it can take longer if reconstruction is done at the same time. The amount removed depends on the type of mastectomy. Usually the breast is removed, and sometimes lymph glands in the armpit are removed too.
Lymph node assessment is easy to miss in the conversation, yet it can change the operation. The axilla means the armpit area where lymph nodes are checked. A sentinel lymph node biopsy, often shortened to SLNB, samples the first lymph nodes that drain the breast area. Axillary lymph node clearance means removing more lymph nodes from the armpit.
For DCIS, NICE recommends sentinel lymph node biopsy for people having mastectomy. For invasive breast cancer with no evidence of lymph node involvement on ultrasound, or a negative needle sample, sentinel lymph node biopsy is recommended to stage the axilla instead of axillary lymph node clearance.
In London-based consultant-led planning, this is where D B Ghosh Breast Surgeon Specialist in Cancer and Cosmetic Surgery keeps the discussion joined up. Breast surgery, lymph node surgery and reconstruction planning need to make sense as one plan.
Reconstruction changes the shape of the decision
Reconstruction can use an implant or, in some cases, skin, fat or muscle from another part of your body. Immediate and delayed reconstruction should both be discussed after mastectomy for breast cancer, while recognising that some people prefer no reconstruction.
Nipple and skin preservation may be possible in selected reconstruction plans, but suitability depends on the cancer position, breast shape, risk factors and the surgeon’s assessment. Going flat also needs careful planning, because a flat closure is still a surgical outcome, with its own shape and scar planning.
Reconstruction belongs in planning; it does not measure whether the cancer operation has succeeded.
Ask how lymph node surgery affects the plan before agreeing to mastectomy. Sentinel lymph node biopsy, axillary clearance and reconstruction timing can change recovery and follow up.
Recovery is manageable when expectations are specific
When recovery is discussed properly, you know what belongs to normal healing and what needs urgent advice. After double mastectomy, the early recovery plan covers wounds, drains, arm movement, pain control and follow-up results.
Temporary wound drains may be used to remove fluid or bleeding from the wound area. They are usually removed within a few days or weeks. Depending on the surgery, some people go home the same day or after 1 or 2 days, while reconstruction at the same time usually means a few days in hospital.
Recovery can take several weeks. Many people return to most usual activities in around 3 weeks, and wounds can take around 6 weeks to fully heal. Those timings are useful, but your own recovery also depends on reconstruction, lymph node surgery and any further treatment being planned.
Possible complications include bleeding, seroma, which is a fluid collection, infection, painful scarring, deep vein thrombosis, numbness or loss of feeling in the arm, frozen shoulder or reduced shoulder movement, and lymphoedema, which is swelling linked to lymph fluid. We raise these risks clearly because they affect consent, preparation and follow-up.
After a recent mastectomy, NHS guidance says you should call NHS 111 for sudden pain or swelling, bleeding from wounds, or sudden loss of feeling in the arm. You should call 999 or go to A&E for severe difficulty breathing, chest or upper back pain, a very fast heartbeat, or if someone has passed out.
A good clinic discussion should leave you with answers to direct questions:
- What is the clinical reason for removing both breasts rather than one?
- What do my imaging, biopsy and tumour markers show?
- Do I need genetic counselling or testing before deciding?
- Will lymph nodes be sampled or removed, and why?
- What are my immediate reconstruction, delayed reconstruction and going-flat options?
- How could radiotherapy or other treatments affect reconstruction timing?
- What should I expect in hospital and during the first weeks at home?
A weaker plan starts with the wish to remove both breasts and looks for reasons afterwards. A stronger plan tests the diagnosis, future risk, lymph nodes, reconstruction choices and recovery load before agreeing the operation. That second approach takes more thought at the start, and it is the one that serves long-term decisions better.
Expert breast surgery advice from a leading London consultant with over 30 years of experience.
Book ConsultationCommon questions about double mastectomy
Does a double mastectomy mean I will avoid chemotherapy or radiotherapy?
No. Chemotherapy and radiotherapy decisions depend on the cancer biology, lymph node results and wider treatment plan, rather than the mastectomy decision alone.
Will my nipples always be removed during a double mastectomy?
Not always. Nipple-sparing surgery may be considered in selected cases, but suitability depends on the cancer details, anatomy and reconstruction plan.
Is going flat a valid choice after double mastectomy?
Yes. Some people prefer no reconstruction, and that should be discussed as a valid surgical pathway with its own planning, scars and recovery expectations.
Do I need a breast MRI before deciding on double mastectomy?
Not everyone needs breast MRI before surgery. MRI is used for specific reasons, such as unclear disease extent or difficult assessment on standard imaging.
Can I seek a second opinion if I have been advised to have both breasts removed?
Yes. A second opinion can help separate cancer treatment needs, inherited risk and reconstruction choices, especially if the advice you have received feels unclear.
This is general information, not medical advice.
