More Than One Spot, Not Necessarily Losing the Breast: Understanding Multifocal Breast Cancer
- By Dr. Vani Parmar, Head of Department - Breast Oncosurgery
If you or someone you love has just been told there's "more than one tumour focus" in the breast, the first question that usually follows is, "Does this mean I have to lose my breast?"
It's a completely natural fear. But here's the reassuring truth—in many cases, the answer is no.
What Does "Multifocal" Actually Mean?
When more than one small tumour is found within the same region of the breast, doctors call this multifocal breast cancer. It sounds alarming, but it's not automatically a reason to go straight to mastectomy. Breast-conserving surgery—the lumpectomy—is often still very much on the table, as long as a few conditions are met.
So, When Can the Breast Be Conserved?
If all the tumour foci are sitting in one area of the breast and together take up less than about 20% of the breast's volume, breast conservation is generally a safe and reasonable option.
The two things that matter most here are:
- Complete removal of the cancer—with a healthy margin of normal tissue surrounding it, so nothing is left behind.
- Reshaping the remaining breast tissue afterwards, so the result looks and feels natural.
Imaging does a lot of the heavy lifting before we even pick up a scalpel. A mammogram usually flags multifocal disease early on. During the surgery itself, a specimen mammogram lets us double-check that everything of concern has actually come out and that the margins are clear. And an MRI beforehand helps rule out any other small, hidden spots elsewhere in the breast that might not show up otherwise.
What If the Area Involved Is Bigger?
Sometimes the disease spans a larger area—up to about a third of the breast. Removing that much tissue can leave a visible dent or asymmetry if the reconstruction isn't planned carefully.
This is where oncoplastic surgery really earns its keep. Using techniques like adjacent perforator flaps (borrowing tissue from around the breast) or local tissue rearrangement, we can redistribute what's left to restore a natural shape and contour. These aren't experimental add-ons—they're well-established, safe procedures that let us achieve both things patients care about most: getting the cancer out and still looking and feeling like themselves.
Removing the cancer completely will always be the priority. But being able to protect the cosmetic outcome at the same time makes a real difference to how patients feel afterward—physically and emotionally.
And When Does Mastectomy Become Necessary?
This is where it's worth knowing the difference between two terms that sound similar but aren't the same.
Multicentric breast cancer means the tumours are in different quadrants of the breast or clearly separated from one another—not clustered in one region. In these cases, breast conservation usually isn't a safe option, and removing the whole breast becomes the more sensible path for controlling the cancer properly.
Even so, this doesn't mean the story ends with just a mastectomy scar. Surgical options have come a long way.
- In early-stage disease—and sometimes even after chemotherapy shrinks the tumor—a skin-sparing mastectomy, or one that preserves the nipple-areola complex, may be possible.
- Once all the breast tissue is removed, reconstruction can follow using:
- Tissue from your own back (the Latissimus Dorsi or LD flap), sometimes paired with a silicone implant
- Tissue from the lower abdomen (DIEP flap)
Both approaches aim to give patients back their shape, without compromising on cancer safety.
What About the Lymph Nodes?
During surgery, we also check the lymph nodes under the arm, since this is where breast cancer often spreads first. If there's suspicion of involvement, the appropriate nodes are removed. But if the sentinel nodes—the first ones the cancer would reach—come back clear, a more limited removal is often all that's needed.
The guiding principle throughout is simple: clear the cancer completely, but never do more surgery than necessary.
The Bottom Line
A diagnosis of multifocal breast cancer doesn't automatically mean losing the breast. With careful imaging, precise surgical planning, and the oncoplastic techniques available today, treatment can be tailored to each patient—protecting both their health and their sense of self.