Lumpectomy when the tumour cannot be felt

Many breast cancers today are found on a mammogram or ultrasound before they can be felt as a lump. These are called non-palpable tumours. They may be small, show up only as a group of tiny calcium specks, or have shrunk after chemotherapy given before surgery. Finding them early is good news, because smaller cancers are often easier to treat and more suitable for breast conservation. The challenge is that the surgeon cannot find the area by touch during the operation, so it has to be marked beforehand. This process is called localisation. Usually, a small metal marker clip is placed in the tumour at the time of biopsy. Then, shortly before surgery or on an earlier day, a radiologist uses mammogram or ultrasound guidance to place a guide. This can be a thin wire whose tip sits in the tumour, a tiny seed or reflector that a handheld probe can detect, or an ink or skin mark for tumours clearly seen on ultrasound. In some centres the surgeon uses ultrasound directly in the operating theatre. After removal, the tissue is often X-rayed straight away to confirm the marker and target area are inside it. The rest of the lumpectomy, recovery and results are much the same as for a lump that can be felt. Localisation takes a little extra time, but it lets your surgeon remove the right area precisely while keeping as much healthy breast as possible.

Early detection is common

Screening often finds cancers before any lump forms.

The area is marked first

A wire, seed or ultrasound mark guides the surgeon to the exact spot.

The tissue is checked immediately

An X-ray of the removed tissue confirms the target was taken out.

Localisation works well in most cases, but there are some points worth knowing.

Margins can still be close

When cancer shows only as calcium specks, its true extent can be harder to judge, so a second operation for margins is sometimes needed.

The day can be long

Wire placement and surgery on the same day may involve waiting between departments.

Guides can occasionally move

A wire or seed may shift slightly, though the specimen X-ray helps catch this during surgery.

What this page cannot tell you

It cannot tell you which method your hospital uses. Ask your team how your tumour will be marked.

Once the tissue is out, the rest of your journey is similar to any lumpectomy.

Recovery is similar

Soreness, bruising and a small scar are usual. The wire or seed site does not need separate care.

The final report matters

The laboratory checks tumour size, type and margins. This decides whether more surgery is needed.

Radiation usually follows

As with other lumpectomies, radiation to the breast is often recommended afterwards.