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Breast core biopsy
Category: Biopsies, Lab & Pathology Tests · All biopsies, lab & pathology tests
What it is
A breast core biopsy takes small cylinders of breast tissue with a spring-loaded needle under ultrasound (or X-ray/stereotactic or MRI) guidance, to diagnose lumps, areas of distortion and microcalcifications found on examination or screening.
Why it is done
It is the standard tissue test in breast clinics after imaging suggests an abnormality needing diagnosis — most results are benign, and a clear benign answer avoids surgery.
How to prepare
Tell the clinic about blood thinners, allergies (local anaesthetic, latex, dressings) and implants. Wear a supportive bra to the appointment. No fasting is needed.
What happens during the procedure
With the area numbed, the needle makes a clicking sound as each core is taken — usually three or more samples. For calcifications, specimen X-rays confirm the right tissue was sampled, and a tiny marker clip may be placed to mark the site for any future surgery. It takes about 20 to 30 minutes.
Afterwards — recovery & results
You go home with a dressing and pressure advice; bruising is common and can be extensive, settling over one to two weeks. Paracetamol is usually enough; avoid aspirin-type painkillers for a day or two unless prescribed. Results are typically given at a follow-up appointment within about two weeks, with the plan for any surgery or reassurance explained.
Risks & considerations
Risks include bleeding/haematoma, infection (uncommon), a non-diagnostic sample occasionally needing repeat or surgical biopsy, and fainting during the procedure (the team watches for this). The marker clip is harmless, permanent and MRI-compatible.
Watch: Breast core biopsy videos
Real procedure videos from the MedicalVideos.com library. Some clinical footage is graphic — that is the nature of a medical video library.
Related guides on MedicalVideos.com
Frequently asked questions
Does a biopsy spread cancer?
No — core biopsy is a safe, standard diagnostic step and does not spread breast cancer. Getting an accurate diagnosis is what enables correct treatment.
Why the marker clip?
If surgery is needed, the clip marks the exact spot even if the abnormality is no longer visible; if benign, it documents the biopsied site on future mammograms.
Related procedures — Biopsies, Lab & Pathology Tests
Browse the B section of the A–Z list or return to the Procedures & Tests hub.