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Breast biopsy

The Marker Clip Left — After Your Breast Biopsy

If you were not told a small metal clip would be left in your breast, finding out from a report or a later scan can feel alarming. It is a standard part of the procedure — placed so the exact site can be found again if it is ever needed.

Medically reviewed by Dr. Bharati Devi Gorantla, Medical Oncologist, MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK) · Last reviewed September 2026

  • It is very small — The clip is a few millimetres — smaller than a sesame seed. You will not feel it.
  • It was placed to help you — If surgery or further imaging is needed, the clip tells your team exactly where to look.
  • It is MRI-safe — Biopsy clips are made from materials that are safe for MRI scanning.
  • It does not reflect your result — A clip is placed at every biopsy as a precaution. The result is not known at the time of the procedure.
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A biopsy marker clip is a small metal tag left at the site where tissue was taken. It marks the location so it appears on future mammograms or scans. The clip is made from materials that are safe for MRI. It does not need to be removed unless surgery later includes that area of breast tissue.

Why was a clip left in your breast?

A biopsy marker clip is a small metal tag, a few millimetres in size, placed at the point where tissue was removed. Most are made from titanium or a similar biocompatible material the body tolerates well.

The biopsy needle removes tissue, and the site can close over and become impossible to find on a scan within days. The clip marks the location permanently so it shows up on future mammograms and imaging.

If your result is clear, the clip stays and causes no harm. If further treatment is needed, the clip tells your surgeon exactly where to go.

How is the clip placed during a breast biopsy?

  1. Imaging guides the needle throughout

    Ultrasound or X-ray imaging is used so your radiologist can see the needle in real time. This is why a scanner is part of what might seem like a simple needle test — the image makes the needle precise.

  2. Tissue samples are taken

    A hollow needle removes small cores of tissue from the area of concern. You will feel local anaesthetic beforehand and some pressure during sampling, but not sharp pain.

  3. The clip is placed through the same path

    After sampling, the clip is introduced through the same track the needle took and positioned at the biopsy site before the needle is withdrawn.

  4. A confirmatory image is taken

    An X-ray or ultrasound image is taken immediately after to confirm the clip is in the right position. Your radiologist documents this before you leave.

  5. The site is dressed and you go home

    A small dressing covers the entry point. Most people leave the same day.

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Is the clip safe, and does it stay in permanently?

Biopsy marker clips are made from materials that are not magnetic in the way steel is. They do not move, heat up, or cause harm during MRI scanning.

The clip is intended to stay in place permanently. Tell any radiologist, surgeon, or anaesthetist treating you in future that a clip is in place, so they can account for it when reading your images. You do not need the precautions required for a pacemaker.

If surgery later removes the area of the breast where the clip sits, the clip comes out with the tissue. Your surgeon uses its position to confirm the correct area was removed.

The clip shows as a small bright mark on future mammograms. Radiologists recognise biopsy clips and note their position in the report.

What else people ask about biopsy clips

I was not told about the clip. Is that normal?

Clip placement is a standard part of most image-guided breast biopsies, but consent discussions do not always make this detail clear. Discovering it on a mammogram report can feel alarming — it is not a sign anything was hidden from you. It is a procedural detail teams often mention briefly or assume was understood. If you have unanswered questions, call the imaging centre or the clinic that arranged your biopsy and ask them to explain.

Does the clip mean my result was bad?

No. A clip is placed at the time of biopsy regardless of what the result turns out to be. The result is not known during the procedure — the tissue goes to a laboratory and takes several days to return. The clip is placed as a precaution so the site can be found whether the result is clear, inconclusive, or shows something needing further attention. Its presence says nothing about your diagnosis.

Will the clip move inside my breast?

Clips are designed to stay where they are placed. The tissue around the clip holds it in position as healing occurs. It is not free-floating. A confirmatory image is taken before you leave to check the clip's position, and if significant movement were seen, your team would address it at that point.

Can I have the clip removed if I want it out?

Removal is possible but requires a surgical procedure, and it is not routinely recommended when the clip is causing no symptoms. If the area is surgically removed for any other reason, the clip comes out with the tissue. If you have a specific concern — discomfort, anxiety, or something related to future treatment — discuss it with your oncologist or breast surgeon, who can advise whether removal is appropriate for your situation.

Will the clip set off a metal detector?

The clips used are very small and made from materials that do not reliably trigger airport or security metal detectors. Most people pass through without any alert. Your biopsy report documents that a clip was placed. Some imaging centres give patients a card at the time of the procedure — ask the team whether one is available.

Explore 62 more Biopsy Techniques and How They Compare topics

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Common questions

Frequently asked questions

Why was a scanner used during my needle biopsy?

The scanner — usually ultrasound or a mammogram machine — lets your radiologist see the needle in real time and guide it to the exact area of concern. Without imaging, a needle biopsy relies on feel alone. The same imaging confirms the clip's position at the end of the procedure. If you expected a simple needle test and a large piece of equipment was also involved, the scanner is why.

Do I need to tell doctors about the clip before future scans or procedures?

Yes. Tell any radiologist, surgeon, or anaesthetist treating you that you have a breast biopsy clip in place. They do not need to take the precautions required for a pacemaker, but knowing about the clip helps them read your images correctly and plan any procedure in that area. Keep a copy of your biopsy report so the details are easy to share.

Can the clip cause irritation or problems over time?

The materials used in biopsy clips are chosen because they do not react with body tissue. Ongoing irritation or a reaction to the clip months or years after placement is not a recognised pattern. Any discomfort in the days immediately after the biopsy is more likely related to the procedure itself and should settle. If symptoms persist or feel unexpected, contact the team that performed the biopsy rather than waiting for a scheduled follow-up.

My mammogram report mentions a biopsy clip I did not know about. What do I do?

Call the clinic or hospital that arranged your biopsy and ask them to walk you through the report. A clip noted on a mammogram simply documents what is in your breast — it is a normal finding after a biopsy. The report is not telling you something is wrong. Once you have spoken to the team who knows your history, you will have a clear picture of what it means for your follow-up care.

How much time does clip placement add to the biopsy?

Very little. The clip is introduced through the same needle track at the end of sampling, before the needle is withdrawn. The overall appointment will take longer than the procedure itself to allow for preparation, consent, and time before you leave. Your team will give you a specific estimate based on the type of biopsy you are having.

Will the clip affect how my future mammograms are read?

The clip appears as a small bright or dense mark on your mammogram. Radiologists recognise biopsy clips by their appearance and record their position in the report. Knowing where tissue was sampled is often useful context for anyone reading your scans in future. Tell any new radiologist about the clip so they have that background. It does not make the mammogram harder to interpret.

Full index

Browse all 701 biopsy topics

Every page in this section, grouped by the part of the journey it belongs to. Pick a group to see what is in it.

What Is a Biopsy?

What Is a Biopsy? Everything You Need to Know →

Types of Biopsy Compared

Which Biopsy Will You Have? Techniques Compared →

Preparing for a Biopsy

What to Expect on the Day of Your Biopsy →

Recovery and Aftercare

After a Biopsy: Recovery, Aftercare and Warning Signs →

Biopsy by Body Part

Biopsy by Body Part: What to Expect at Each Site →

Understanding Your Report

How to Read a Biopsy Report: Terms Explained →

IHC and Molecular Markers

IHC and Molecular Markers on a Biopsy: What They Mean →

Grading and Scoring Systems

Cytology & Prostate Scoring Systems Explained →

How Accurate Is a Biopsy?

How Accurate Is a Biopsy? Errors and Second Opinions →

If Your Result Is Benign

Your Biopsy Is Benign: What It Means and What Comes Next →

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