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After your breast biopsy

Marker Clip Left After — a Breast Biopsy

If a clip was placed inside your breast after a biopsy and no one explained it, you are not alone. The clip is a standard part of the procedure — a tiny marker that helps your care team find the exact spot again. This page explains what it is, whether it stays, and whether it is safe.

Medically reviewed by Dr. Muralidhar Muddusetty, Surgical Oncologist, MBBS (AIIMS) · MS Surgery (AIIMS) · DNB Surg Onc · MRCS (Edinburgh) · Last reviewed September 2026

  • Routine and expected — Placing a clip at the end of a core needle biopsy is standard practice, not a sign that something is wrong.
  • Cannot be felt — The clip is far too small to feel through the skin and causes no ongoing symptoms.
  • Safe for MRI — Biopsy clips are made from non-magnetic material and are safe to scan. Tell the technician before every MRI.
  • Stays unless surgery removes it — If no surgery is needed, the clip remains in your breast indefinitely and causes no harm.
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The clip is a small titanium marker left inside your breast at the end of the biopsy. It marks the exact spot where tissue was removed, so radiologists can find that location again on future scans. It is safe, causes no symptoms, and stays in place unless you need surgery.

Why did the doctor leave a clip inside my breast?

At the end of a core needle biopsy, your radiologist places a tiny titanium marker into the biopsy site. This clip marks the exact point where tissue was removed.

Without it, the small cavity left by the biopsy heals quickly and becomes nearly impossible to locate on a mammogram or ultrasound. The clip keeps that site visible on every future scan.

This matters whether your result is benign or not. If a second look or repeat biopsy is ever needed, the team knows where to go. If surgery is recommended, the clip guides the surgeon to the right location. If results are benign, it is the reference point that lets radiologists compare the same spot year after year.

Will the clip stay in my breast permanently?

Yes, unless surgery removes it. The clip is designed to remain in place long-term. It causes no pressure, no allergic reaction, and no change to the surrounding breast tissue.

If your results lead to surgery, the surgeon will most likely remove the clip along with the tissue at that site. You will not have it afterwards.

If your results are benign and no surgery is planned, the clip remains in your breast. It does not rust, does not dissolve, and does not need to be removed.

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Is the biopsy clip safe for MRI and airport security?

Biopsy marker clips are made from non-magnetic materials — typically titanium — and are safe for MRI scanning. They do not move inside your body when exposed to the scanner's magnetic field.

The clip may appear as a very small shadow on the MRI image. This is expected. The radiologist records it as a biopsy marker site. Before every MRI, tell the technician you have a biopsy clip so your images are read correctly.

The clip is too small to activate airport metal detectors. You do not need a medical letter or travel certificate because of it.

What happens with the clip from biopsy day to your next appointment?

  1. Clip is placed at the end of the biopsy

    The radiologist inserts the clip through the same needle used for the biopsy, into the space where tissue was removed. You will not feel this step.

  2. A confirmation image is taken before you leave

    A mammogram or X-ray is taken immediately to confirm the clip is sitting in the correct position. This image is added to your permanent record.

  3. Your tissue sample goes to pathology

    The biopsy sample is sent to a pathologist for analysis while the clip stays in place. Results typically take several days to a week or more.

  4. Benign result: the clip becomes a surveillance landmark

    If your result is benign, the clip marks the exact spot for future mammograms, so radiologists can confirm that area remains unchanged over time.

  5. If further treatment is needed: the clip guides your team

    If cancer is found, the clip tells your surgeon precisely where the biopsy site is, even if the area looks different after chemotherapy or other treatment.

Questions families ask about the biopsy clip

Can I feel the clip inside my breast?

No. The clip is far too small to feel through the skin and causes no pressure or discomfort. Most people are unaware it is there within a day of the biopsy, once any soreness from the procedure settles. If you notice a new lump or unusual firmness that was not there before, that is worth reporting to your care team — but it will not be the clip.

Will the clip show on future mammograms or ultrasound?

Yes, and this is intentional. The clip appears as a small distinctive mark on the image, which the radiologist records in your report as a biopsy marker. When you go for follow-up imaging at the same or a different centre, always mention that a clip was placed, and bring your earlier biopsy report if you have it. This prevents the clip from being flagged as something new.

Do I need to mention the clip to every doctor I see from now on?

Yes, particularly before any breast imaging or scan. It does not need to be a detailed conversation — a simple note that you have had a breast biopsy and a clip was placed is enough. If you have your biopsy report, keeping a copy accessible is the easiest way to pass this information on when you change hospitals or move to a new city.

Can the clip move from where it was placed?

Clips are designed to anchor in the biopsy cavity, but a very small shift can occasionally happen as the cavity heals in the days after placement. This is why a confirmation image is taken immediately after the procedure. Significant migration is uncommon. Your radiologist tracks clip position each time imaging is done, and any change that matters clinically will be discussed with you.

My results came back benign — do I still need the clip?

Yes. A benign result is reassuring, but the clip remains useful as a reference point for follow-up mammograms. Radiologists compare the marked spot over time to confirm it stays stable. Removing a clip from a benign biopsy site is not routine — it would require a separate procedure with its own small risks — so most teams leave it in place unless there is a specific clinical reason to remove it.

Why was I not told about the clip before the biopsy?

This is one of the most common concerns, and it is a fair one. Placing a clip is standard at the end of a core needle biopsy and is usually included in the consent process, though not every team explains it in detail beforehand. If you feel you were not informed, ask your oncologist for a full explanation now. Going forward, it is reasonable to ask at the start of any procedure what will happen and whether anything will remain in your body.

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Common questions

Frequently asked questions

What is a biopsy marker clip made of?

Biopsy clips are most commonly made from titanium or similar non-magnetic metals. These materials were chosen because they are inert in the body, safe for MRI scanning, and do not cause allergic reactions in the vast majority of people. If you have a known sensitivity to a specific metal, tell your care team before the biopsy so they can check which clip material was used and flag it in your records.

Will the clip set off a metal detector at the airport?

No. Biopsy marker clips are too small and made from non-magnetic metal, so they do not activate airport security scanners. You do not need a medical letter or special documentation to travel. If you are asked about implants or medical devices at security, you can mention it, but in practice the clip falls well below the detection threshold of standard airport equipment.

My report says 'clip in situ' — what does that mean?

'Clip in situ' means the clip is confirmed to be sitting exactly where it was placed. In situ is Latin for 'in place'. It is entirely normal wording in a post-biopsy report — the radiologist is confirming the marker is where it should be. If you are reading your own report and are uncertain about any phrase in it, ask your oncologist to go through it with you at your next appointment.

Can the clip cause any harm over the long term?

No long-term harm from biopsy marker clips has been established in the medical literature. The clip does not interact with surrounding tissue, does not corrode, and does not break down over time. If you develop any new symptoms in the breast — a lump, unusual pain, or skin changes — report them to your care team promptly, but they are very unlikely to be related to the clip itself.

I forgot to mention the clip before my MRI — what should I do?

Tell the MRI technician as soon as you remember, even if you are already in the scanning room. The clip is safe for MRI, so this is not a safety emergency. The reason to mention it is so the radiologist reading your images knows to expect a small artefact at the biopsy site and does not interpret it as something new. If the scan is already complete, raise it when you discuss the results with your doctor.

Can I ask for the clip to be removed if I do not want it?

You can raise this with your oncologist, and it is a reasonable question. In most cases, removal is not recommended unless there is a specific clinical reason, because it requires a separate procedure with its own small risks, while the clip sitting quietly in place causes no harm. Your oncologist will explain whether removal makes sense in your situation. There is no urgency to decide, and you can revisit the question at any point.

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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