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Pathology second opinion

How to Get a Second Opinion — on Your Biopsy

A second pathologist can re-read the same slides from your biopsy without you going through the procedure again. Most people do not know they have the right to those slides — or that asking for them is straightforward.

Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026

  • No new biopsy needed — The slides and tissue block from your original procedure are all a second pathologist needs.
  • You have a right to your slides — Hospitals are required to release your slides on request. You do not need a specific reason.
  • An independent report, not a comparison — The reviewing pathologist examines the slides fresh, without seeing the first opinion first.
  • Ask before treatment starts — A review is possible at any time, but it is easiest to act on before major treatment begins.
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A biopsy second opinion means a different pathologist re-reads the same slides from your original procedure — no new biopsy needed. You request your slides from the hospital where the biopsy was done, send them to a specialist centre, and receive an independent written report. Most reviews take at least a week; some take longer if additional tests are needed.

When is a second opinion most important?

Your situationIs a review worth getting?What it can change
The cancer type is rare, or the report uses terms your oncologist is unfamiliar withYes — recommendedConfirms the subtype that decides which treatment to use
The report says 'atypical', 'borderline' or 'cannot exclude'YesDetermines whether treatment starts at all, and what kind
Your oncologist is surprised by the result, or it does not fit your clinical pictureYesGuides the next step from a position of confidence
Major or irreversible treatment — surgery, radiotherapy — is being plannedYes — before you proceedWorth the time before a decision that cannot be undone
Common finding at a high-volume centre, oncologist is confidentNot urgentUnlikely to change management, but always your right to ask

What do you need to send for a pathology review?

  • Your original pathology report — all pages, not just the summary
  • The glass slides from your biopsy (tissue sections mounted on glass)
  • The paraffin block if the reviewing centre requests it — ask when you first call
  • A referral letter or written request from your oncologist
  • Any imaging report that shows where the biopsy was taken from
  • Your name and date of birth clearly marked on every item you send
  • A return address and contact number for where the report should go

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MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)

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Dr. Owais Mohammed

MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)

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Dr. T. Raghavender Reddy
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Dr. T. Raghavender Reddy

MBBS, DM (Medical Oncology), MD (Radiation Oncology)

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Dr. N. Kiranmayee

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Dr. Vinay Mamidala
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Dr. Venkata Sushma P
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How does a pathology review actually work?

The reviewing pathologist examines your slides under a microscope, independently. They do not typically see the first opinion before forming their own — that is intentional, to avoid anchoring bias.

Depending on what they see, they may request additional staining or molecular tests on the same tissue block. This can add time, but it also means the review is more thorough than simply re-reading the original slide.

At the end they issue a written report. If it agrees with the first, that agreement is itself useful information. If it differs, the two reports together give your oncologist a clearer picture of what to ask next.

How to get a second opinion on your biopsy, step by step

  1. Request your slides from the hospital

    Contact the pathology department — not the clinical team — and ask for the glass slides and paraffin block from your biopsy. Give the biopsy date and the reference number from your report. They may ask you to sign a release form.

  2. Gather your documents

    Collect your full pathology report, the imaging report from the biopsy appointment, and any other investigation results your oncologist thinks are relevant to the review.

  3. Choose a centre and confirm what they need

    Call ahead before sending anything. Different centres have different requirements — some want the paraffin block, some want only slides, some accept digital scans. Ask about format, packaging, and where to send the material.

  4. Send or hand-carry the slides

    Glass slides break in transit. If you send by courier, use rigid packaging and mark it fragile. Hand-carrying to the centre is safer and removes any risk of loss or damage.

  5. Follow up on the timeline

    Ask when you can expect the report, and get a contact name so you can follow up without starting from scratch each time. If additional staining or molecular testing is needed, the report will take longer than a straightforward re-read.

  6. Bring both reports to your oncologist

    The second report does not replace the first — it sits alongside it. Your oncologist reviews both and explains what they mean for your care plan.

Did you know?

The College of American Pathologists and ASCO have both documented that expert pathology review identifies discrepancies — differences from the original diagnosis — in a clinically meaningful proportion of cancer cases, and that some of these discrepancies change the recommended treatment.

The review uses tissue you have already given. You do not go through the procedure again.

Source: College of American Pathologists; ASCO guidance on pathology quality and second opinions

Explore 112 more Markers, Molecular Testing and Test Accuracy topics

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All Markers, Molecular Testing and Test Accuracy →

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Common questions

Frequently asked questions

Do I need a new biopsy to get a second opinion?

No. The slides and tissue block from your original biopsy contain everything a second pathologist needs. The review is done on the same material, which means no additional procedure, no anaesthesia, and no new wound. This is the part most people are surprised by. The only thing you need to do is request the slides from the hospital where the biopsy was done — they are your records and you have a right to them.

How long does a pathology second opinion take?

It depends on the centre, how much material they receive, and whether they need to perform additional staining or molecular tests on the tissue block. A straightforward re-read may take a week or more. If the reviewing pathologist wants further testing — which happens when the diagnosis is complex — it will take longer. Ask the centre for a realistic estimate when you first contact them, and get a name to follow up with so you are not waiting without a timeline.

Will the second pathologist see the first opinion before they read the slides?

Most specialist centres intentionally do not show the reviewing pathologist the original report before they form their own view. This is standard practice — it removes anchoring bias and ensures the second opinion is genuinely independent. Once they have reached their own conclusion, they may compare it with the first report before finalising theirs. Ask the centre what their specific process is when you make contact.

What happens if the two opinions disagree?

A discrepancy does not mean one pathologist is wrong and the other is right. It means the diagnosis is genuinely uncertain, and that uncertainty needs to be resolved before treatment decisions are made. Your oncologist may request a third expert review, may ask both pathologists to discuss the case together, or may order additional molecular tests on the tissue. A disagreement is not a crisis — it is the system working as it should, and resolving it puts you on more solid ground before treatment begins.

Can I arrange a second opinion through CION?

Your oncologist at CION can advise which centres are most appropriate for your specific cancer type and help coordinate the referral. CION does not run its own pathology laboratory, but guiding patients through the process of obtaining specialist review is a routine part of the care your team provides. Bring your full pathology report and ask your oncologist at your next appointment — they can tell you exactly what to request and where to send it.

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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