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Core Needle Breast Biopsy

Medically reviewed by Drugs.com. Last updated on Apr 2, 2024.

What do I need to know about a core needle breast biopsy (CNBB)?

A CNBB is a procedure to remove a sample of fluid or tissue from your breast. The samples are sent to a lab and tested for cancer or infection. The needle used in a core needle biopsy is larger than the one used in a fine needle aspiration. This lets your healthcare provider take a larger sample of tissue.

How do I prepare for a CNBB?

What will happen during a CNBB?

What will happen after a CNBB?

Healthcare providers will monitor you until you are awake. You may need a mammogram if a marker was inserted during your procedure. This will make sure that it is in the correct place. You may be sore or have bruising or swelling in your breast for a few days. Do not breastfeed for 24 to 48 hours if you received contrast liquid. The contrast liquid may harm your baby. You may go home after your procedure or you may need to spend a night in the hospital.

What are the risks of a CNBB?

You may bleed more than expected or get an infection. A pocket of blood or fluid may form under your skin. You may need surgery to drain or remove it. The biopsy needle may make a hole in your lung and cause trouble breathing. You may need other treatments to fix the hole.

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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