The breast biopsy process explained

The clinician may guide the needle with ultrasound, mammography, or MRI, depending on which method shows the area most clearly. Local anaesthetic is commonly used for needle sampling.

A pathologist checks whether the finding is benign, uncertain, or malignant and describes the tissue features. When breast cancer is identified, additional laboratory markers may help the clinical team classify it and choose appropriate treatment.

The radiologist also checks whether the laboratory finding explains the area seen on imaging. If the imaging and pathology do not match, more tissue or surgical removal may be recommended even when the first sample did not identify cancer.

Before the appointment, share your medicine list, allergies, pregnancy status, bleeding history, and any difficulty lying in the required position. Follow the service's instructions about eating and medicines; only the prescribing or biopsy team should direct a medicine change.

Wear a supportive bra if the clinic recommends one and use the cold-pack method they provide. Keep the dressing dry for the stated period, avoid heavy upper-body effort until cleared, and retain the contact details for the results service.

Bruising, tenderness, and a small firm area can follow needle sampling. Contact the clinic if swelling is rapidly enlarging, pain is worsening, redness spreads, the site becomes hot, fluid drains from the wound, or you develop fever.

Seek urgent care for bleeding that persists after following the clinic's pressure instructions, fainting, breathing difficulty, facial swelling, or severe chest symptoms.

Confirm how the biopsy will be guided, whether a small marker will be placed, which activities to avoid, and who will remove any dressing or stitches. Ask when results are expected, how you will receive them, and what happens if the imaging and pathology are not concordant.