Breast Biopsy

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Finding a lump or receiving an abnormal mammogram result can feel unsettling. A breast biopsy is often the next step — and while the word "biopsy" can sound intimidating, it's a routine, outpatient procedure that gives your care team the information they need to make the right decisions for your health. Most biopsies confirm that a finding is benign, and even when results show something that needs treatment, catching it early makes a difference.

What is a Breast Biopsy?

A breast biopsy procedure is a minimally invasive way to examine breast tissue more closely. During the procedure, a small sample of tissue is removed from the area of concern and sent to a pathology lab, where specialists determine whether the cells are normal, benign or cancerous.

Your doctor may recommend a breast biopsy if imaging reveals an unusual area — such as a lump, mass or cluster of calcifications — that needs further evaluation. A biopsy is the only way to know for certain whether a change in breast tissue is concerning.

Types of Breast Biopsy Procedures

There are several ways a biopsy is done on breasts, and your care team will recommend the approach best suited to the size, location and characteristics of the area in question.

Excisional Breast Biopsy
An excisional breast biopsy involves surgically removing the entire lump or area of concern, rather than just a sample. It's performed less frequently today — most diagnoses can be made with a needle biopsy — but may be recommended when a needle biopsy is inconclusive or when the size or location of the tissue makes surgical removal the better approach.
MRI-Guided Needle Breast Biopsy
An MRI-guided breast biopsy is used when an area of concern is only visible on MRI. You'll lie inside the MRI machine during the procedure while the imaging guides the needle to the exact location of the tissue sample.
Needle Biopsy of the Breast
Needle biopsies of the breast are most common and include both fine needle aspiration and core needle biopsy. A core needle biopsy uses a hollow needle to remove small cylinders of tissue, while fine needle aspiration uses a thinner needle to withdraw cells. Core needle biopsy is the more common choice because it provides a more complete tissue sample for analysis.
Stereotactic Needle Breast Biopsy
A stereotactic breast biopsy uses mammography imaging and computer guidance to precisely locate and sample tissue that’s visible on a mammogram but not felt by hand. You'll sit — sometimes lay on your side — in a special chair with your breast positioned in the mammogram. The imaging system helps guide the needle with accuracy. This approach is most used for microcalcifications or findings not seen on ultrasound.
Ultrasound-Guided Needle Breast Biopsy
An ultrasound-guided breast biopsy uses real-time ultrasound imaging to guide the needle to the area of concern. It's commonly used for lumps or masses visible on an ultrasound. This biopsy technique is precise, widely available and doesn't involve radiation.

How to Prepare for a Breast Biopsy

Here's how to set yourself up for a smooth procedure:

  • Allergies: If you have any known allergies — particularly to local anesthetics or contrast dye — let your team know in advance.
  • Arrangements: Most patients drive themselves home, but it's always a good idea to have someone with you for support, especially if you feel anxious about the procedure.
  • Eating and drinking: Most breast biopsies are performed with local anesthesia, so there are typically no restrictions on eating or drinking beforehand. Your care team will confirm this based on your specific procedure.
  • Medications: Let your care team know about all medications and supplements you take, including blood thinners such as aspirin, ibuprofen or warfarin. You may be asked to stop taking certain medications several days before your procedure to reduce bleeding risk.
  • What to wear: Wear a comfortable, two-piece outfit so you can easily undress from the waist up. You'll also want to wear or bring a supportive bra, as gentle compression after the procedure helps minimize bruising and discomfort.

What to Expect During a Breast Biopsy

Before the procedure begins, your care team will review your imaging, explain exactly what will happen and answer any questions. The area is cleaned and a local anesthetic is injected to numb the tissue so you're comfortable throughout.

During the procedure, you’re positioned based on the type of biopsy performed — lying on your back, side or stomach depending on the technique. Once the area is numb, a small nick may be made in the skin to allow the needle to pass through. Using imaging guidance, your physician carefully directs the needle to the area of concern and collect one or more small tissue samples. A tiny marker clip is often placed at the biopsy site to help your care team locate the area on future imaging — this is safe, permanent and won't cause any discomfort.

Will it hurt?

Most patients feel little to no pain during the procedure. The local anesthetic injection may cause a brief sting or burning sensation, but the biopsy itself is typically painless. You may feel some pressure or movement as the needle collects tissue. If you feel discomfort at any point, let your care team know right away.

How Long Does a Breast Biopsy Take?

Most breast biopsies take between 30 and 60 minutes, including preparation and imaging. The tissue sampling itself typically takes only a few minutes.

Breast Biopsy Recovery Timeline

Recovery from a breast biopsy is generally quick, and most patients return to their normal routines within a day or two.

Immediately after: You may experience mild soreness, swelling or bruising around the biopsy site. Your care team will apply a bandage and may recommend gentle compression to reduce swelling. Ice packs can help with discomfort in the first 24 hours.

The first few days: Some tenderness and bruising is normal and typically fades within a week. Avoid strenuous activity, heavy lifting and anything that puts direct pressure on the biopsy site for at least 24 to 48 hours, or as directed by your care team.

Sleeping position after breast biopsy: Many patients find it most comfortable to sleep on their back or on the opposite side for the first few nights. Wearing a soft, supportive bra — even to bed — can help reduce movement and discomfort while you heal.

Core needle breast biopsy recovery time: Recovery after a core needle biopsy is typically the shortest of any biopsy type. Most patients feel back to normal within two to three days. Any bruising or mild swelling generally resolves within one to two weeks.

Excisional biopsies involve a small incision and may require a few additional days of rest and a follow-up visit for suture removal.

When to Expect Breast Biopsy Results

Breast biopsy results are typically available within three to five business days, though complex cases may take a bit longer. Your radiologist physician or another radiology team member will contact you directly to discuss your results — you won't be left waiting and wondering without support.

Your results will appear in MyUnityPoint, our patient portal, sometimes before your care team has had a chance to call you — that's normal. Breast biopsy results are typically available within three to five business days, though complex cases may take a bit longer. Your radiologist or another member of the radiology team will contact you directly to discuss your results with you — you won't be left waiting and wondering without support.

What Happens After a Breast Biopsy is Positive?

If results indicate cancer or a precancerous condition, your care team will reach out promptly to walk you through next steps. A positive result is the beginning of a clear path forward, not the end of the road. Your team will explain your diagnosis in plain language, answer your questions and connect you with the specialists — such as a breast surgeon, oncologist or radiation oncologist — best suited to guide your treatment.

If your results are benign, the radiologist physician will let you know whether any follow-up imaging or monitoring is recommended.

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