1800 202 8726
Before your biopsy

Preventing an Inadequate Biopsy — What to Ask Before You Go

An inadequate biopsy is one of the harder outcomes to absorb — you went through the procedure, waited for results, and came back with no answer. Most of the time it is preventable. The right questions, asked before the procedure, give the sample the best chance of being enough the first time.

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

  • Ask about image guidance — CT or ultrasound guidance helps the doctor reach the right part of the tumour rather than sampling dead tissue at the centre.
  • Ask about sample number — More cores from the right location means the pathologist has enough material to work with.
  • Ask about molecular testing — Standard diagnosis and biomarker testing need different sample preservation — clarify both before you go.
  • Ask about the laboratory — Knowing where the sample goes and when results return helps you understand the timeline and plan what comes next.
4.8 · 800+ Google reviews · 15,000+ patients treated
Limited Slots Today

Get this explained properly

₹950   Today: FREE  ·  Including free written second opinion

Reply within 2 working hours
Report reviewed by a senior oncologist
Confidential. No commitment to start treatment.
or
Call 1800 202 8726
17+
Cancer Specialists
on Panel
96.9%
Breast Cancer
Survival Rate*
15,000+
Patients
Treated
4.8★
Google Rating
(800+ reviews)

Three questions before your biopsy — which technique, whether imaging guides the needle, and whether the sample will cover molecular testing as well as diagnosis — are the most useful things you can do to avoid an inadequate result. Most inadequate biopsies happen because the sample was too small, from the wrong area, or not preserved for all the tests needed.

What should you ask your doctor before the biopsy?

Ask whether imaging — CT or ultrasound — will guide the needle during the procedure. Image guidance lets the doctor see exactly where the needle is going and steer it toward viable tumour tissue rather than the dead centre of a large mass.

Ask how many core samples will be taken. Taking several cores from the right part of the lesion gives the pathologist more material to work with. Too few samples, or samples from the wrong location, are a common reason results come back insufficient.

Ask whether the sample will be preserved for molecular testing as well as standard diagnosis. Many cancers now require biomarker testing — for markers such as EGFR, PD-L1, or MSI — on the same tissue. If preservation is not set up for both from the start, a second procedure may be unavoidable.

Ask where the pathology will be read. Some centres process samples in-house; others send them to a reference laboratory. Either can be reliable — knowing which tells you the realistic timeline for your result.

What can you do before the day of your biopsy?

  • Ask whether imaging will guide the needle during your procedure.
  • Ask how many core samples your doctor plans to take.
  • Ask whether the tissue will be preserved for molecular testing, not just standard pathology.
  • Tell your team about every medicine you take, including aspirin, blood thinners, and any supplements or herbal preparations.
  • Ask where the sample will be sent and when the result is expected.
  • Ask what happens if the first sample turns out to be insufficient — so you are not caught off guard if that is the outcome.

Still unclear?

Send your reports across and a specialist will walk you through what they mean — what is known, what is not, and what the options actually are.

Meet the Specialists

17+ senior cancer specialists. One panel for your case.

Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.

Dr. Naresh Gundu
Medical Oncologist

Dr. Naresh Gundu

MBBS, DNB (Internal Medicine), DM (Medical Oncology)

View Profile
Dr. C. Raghavendra Reddy
Medical Oncologist

Dr. C. Raghavendra Reddy

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

View Profile
Dr. Bharati Devi Gorantla
Medical Oncologist

Dr. Bharati Devi Gorantla

MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)

View Profile
Dr. Owais Mohammed
Medical Oncologist

Dr. Owais Mohammed

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

View Profile
Dr. T. Raghavender Reddy
Medical Oncologist

Dr. T. Raghavender Reddy

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

View Profile
Dr. N. Kiranmayee
Medical Oncologist

Dr. N. Kiranmayee

MBBS, DM (Medical Oncology), MD (Internal Medicine)

View Profile
Dr. Muralidhar Muddusetty
Surgical Oncologist

Dr. Muralidhar Muddusetty

MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)

View Profile
Dr. Raghavendra Naik
Surgical Oncologist

Dr. Raghavendra Naik

MBBS, MS (General Surgery), M.Ch (Surgical Oncology)

View Profile
Dr. Mohammed  Imaduddin
Surgical Oncologist

Dr. Mohammed Imaduddin

M.B.B.S, MS (General Surgery), M.Ch (Surgical Oncology)

View Profile
Dr. Vinay Mamidala
Surgical Oncologist

Dr. Vinay Mamidala

MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)

View Profile
Dr. Paila Gowri Naidu
Surgical Oncologist

Dr. Paila Gowri Naidu

MBBS, MS (General Surgery), M.Ch (Surgical Oncology), FMAS

View Profile
Dr. Venkata Sushma P
Radiation Oncologist

Dr. Venkata Sushma P

MBBS, MD (Radiation Oncology)

View Profile
Dr. Kirti Ranjan Mohanty
Radiation Oncologist

Dr. Kirti Ranjan Mohanty

MBBS, MD (Radiation Oncology)

View Profile
Dr. Gangadhar Vajrala
Radiation Oncologist

Dr. Gangadhar Vajrala

MBBS, MD (Radiation Oncology), MPH

View Profile
Dr. Basudev Pokhrel
Hematologist

Dr. Basudev Pokhrel

MBBS, M.D (Immunohematology & Blood Transfusion)

View Profile
Dr. Mohammed Imran
Interventional Radiologist

Dr. Mohammed Imran

View Profile
Dr. Vajja Sandeep Kumar
Surgical Oncologist

Dr. Vajja Sandeep Kumar

MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology

View Profile
Dr. Sridhar Kamani
Surgical Oncologist

Dr. Sridhar Kamani

MBBS, MS (General Surgery), DrNB (Surgical Oncology)

View Profile

Want a specific doctor for your case? Mention them when booking.

Book Free Consultation

Get a straight answer from a specialist

45 minutes, your reports reviewed, your questions answered in plain language.

Book Free Consultation Call 1800 202 8726

Which biopsy technique is least likely to give an inadequate result?

TechniqueTissue collectedTypically used forMain adequacy risk
CT-guided core needle biopsyMultiple cores — enough for most tests including molecularDeep lesions in chest, abdomen, or pelvisSampling the dead centre rather than the viable tumour edge
Ultrasound-guided core needle biopsyMultiple cores — enough for most tests including molecularSuperficial nodes, breast, liver, soft tissueLesions not visible or poorly seen on ultrasound
Fine needle aspiration (FNA)Cells only — no tissue coreLymph nodes, thyroid, superficial lumpsOften not enough for molecular testing; a frequent source of inadequate results
Endoscopic biopsy (bronchoscopy, colonoscopy)Small fragments, variable numberAirway, lung, bowel, stomach liningPeripheral lung lesions may be beyond reach; small sample size
Surgical (open or excision) biopsyLargest sample availableWhen other approaches have failed or are not feasibleMore invasive; not a first approach for most tumours

Did you know?

Fine needle aspiration provides cells without tissue architecture — and that matters because many current biomarker tests require an actual core of tissue to return a result.

ESMO guidelines recommend image-guided core needle biopsy as the preferred first approach for most solid tumours, precisely because it balances sample adequacy with safety.

Source: ESMO Clinical Practice Guidelines — Pathology and Molecular Diagnostics

Explore 112 more Markers, Molecular Testing and Test Accuracy topics

HUB — How Accurate Is a Biopsy? Repeats, Errors and Second Opinions

HUB — IHC and Molecular Markers on a Biopsy

HUB — Labs, Slides and Second Opinions on a Biopsy

All Markers, Molecular Testing and Test Accuracy →

Next step

Still not sure what applies to you?

Send your reports across and a senior medical oncologist will go through what they mean, what is known, and what the options actually are.

Book Free Consultation Call 1800 202 8726
Common questions

Frequently asked questions

Does it matter which hospital or imaging centre performs the biopsy?

Experience with your tumour type matters more than the name of the centre. What counts is whether the doctor performing the procedure is experienced in image-guided sampling for your specific lesion location, and whether the pathology laboratory is equipped to process the sample for both standard diagnosis and molecular testing. Your oncologist is best placed to advise you on where makes sense in your situation — they have access to your imaging and know which centres handle your tumour type regularly.

Can I ask for a different technique than the one my doctor suggested?

You can ask, and your doctor should be able to explain why a particular technique was chosen. The choice is usually guided by where the tumour is, how large it is, what structures surround it, and what the sample needs to show. In some situations there is a genuine choice between approaches; in others only one is safe or feasible. If you would like a second opinion on the planned approach before going ahead, that is a reasonable request.

Is a fine needle biopsy enough, or do I need a core biopsy?

For most cancer diagnoses today, a core needle biopsy is preferable to fine needle aspiration because it provides a tissue core rather than loose cells. That tissue structure is what many molecular tests require. Fine needle aspiration may still be appropriate in specific situations — for example, confirming that a lymph node contains cancer before planning surgery — but if biomarker testing is likely to follow, ask whether a core biopsy is possible. Your oncologist can tell you what your specific diagnostic pathway requires.

What does 'insufficient for molecular testing' mean on a pathology report?

It means the pathologist received enough tissue to confirm the cancer diagnosis but not enough to run the additional biomarker tests needed to guide treatment — such as which targeted therapy or immunotherapy might be relevant. It does not mean the diagnosis itself is in doubt. It does mean another sample will be needed before a treatment plan can be finalised. This outcome is one of the most common reasons a repeat biopsy is recommended, and it is often preventable if molecular preservation is specifically requested before the first procedure.

How many samples are usually taken during a biopsy?

This depends on the technique and the tumour being sampled. For a core needle biopsy, several passes are typically made to collect multiple cores, because no single core is guaranteed to be representative of the whole tumour. The exact number is a clinical decision made during the procedure. It is reasonable to ask your doctor beforehand how many they expect to take. Letting them know that molecular testing will be needed can also influence how the sampling is planned.

I have already had one inadequate biopsy. What should I ask before the next one?

Ask your doctor what made the first sample insufficient and what will be done differently this time. The answer may involve a different technique, a different target area within the tumour, image guidance where none was used before, or a different pathology laboratory. Ask explicitly that the new sample be preserved for molecular testing, since this is sometimes the gap that was missed the first time. The decision about technique and location for the repeat procedure should be made with your treating oncologist, who has your imaging and prior results to work from.

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 →

Call now Book free consultation