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Newer sampling methods

Newer Cancer Sampling Methods: — What Is Available in India Now

Several newer ways to sample cancer are available in India today. Most supplement a standard tissue biopsy — they do not replace it. If your oncologist has recommended a biopsy, waiting for a newer technique is not a safe choice.

Medically reviewed by Dr. Mohammed Imaduddin, Surgical Oncologist, MBBS · MS (General Surgery) · M.Ch (Surgical Oncology) · Last reviewed September 2026

  • Blood tests, not just needles — Liquid biopsy detects cancer DNA in a blood sample and is available at specialist labs in Indian cities.
  • Monitoring, not first diagnosis — Most newer methods are used to track treatment response, not to make the initial diagnosis on their own.
  • Tissue biopsy still required — NCCN, ASCO and ESMO guidance is consistent: tissue biopsy remains the standard for first diagnosis.
  • Do not delay — No newer method currently available in India removes the need for a timely tissue sample when cancer is suspected.
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Several newer sampling methods are available in India today, including liquid biopsy, which detects cancer DNA in a blood sample. Most are used for monitoring treatment, not for first diagnosis. A standard tissue biopsy remains necessary to confirm cancer and guide first treatment. Do not delay a needed biopsy while waiting for a newer option.

Liquid biopsy versus standard tissue biopsy: what is the real difference?

Standard tissue biopsyLiquid biopsy (blood test)
What is sampledA piece of tumour tissue removed by needle, scope or minor surgeryCancer DNA fragments shed by the tumour into the bloodstream
How it is doneA needle, scope or surgical procedure — usually image-guidedA standard blood draw — no needle into the tumour
Can it confirm a first diagnosis?Yes — required by NCCN, ASCO and ESMO as the standardNo — a positive result still requires tissue to confirm
What it tells youTumour type, grade, PD-L1, MSI, TMB — the full diagnostic pictureResistance mutations and treatment response signals in certain cancers
What it cannot tell youReal-time molecular changes without a repeat procedureTumour type or diagnosis on its own
Available in India now?Yes — at CION centres and most oncology hospitalsYes — at specialist labs in major cities; referral usually needed
Main use in practiceFirst diagnosis, treatment planning, surgical planningMonitoring treatment response, detecting emerging resistance

What newer biopsy methods are available in India right now?

Liquid biopsy — testing a blood sample for circulating tumour DNA — is the newer method most available in India today. Specialist labs in major cities offer it for specific indications, mainly to monitor whether a treatment is working or to detect mutations that emerge when a cancer becomes resistant.

Image-guided biopsy has improved considerably and is now standard practice at most oncology centres. CT-guided and ultrasound-guided core needle biopsies can reach tumours that would previously have needed open surgery to sample.

Endoscopic ultrasound-guided sampling allows biopsies of pancreatic, stomach and some lung tumours through a scope, without a surgical incision. This is available at larger oncology and gastroenterology centres in Indian cities.

Multi-cancer early detection blood tests — which aim to find several cancers from a single blood draw before symptoms appear — are in large-scale international trials. They are not yet cleared by CDSCO for clinical use in India.

Reasons not to delay a biopsy your oncologist has already recommended

  • A delay of weeks can change what stage your cancer is at when treatment begins.
  • Liquid biopsy cannot confirm a new diagnosis on its own — tissue is still needed first.
  • Newer tests in trials are not yet approved by CDSCO for initial diagnosis in India.
  • Fast-growing cancers can spread or become harder to treat during a wait.
  • Most newer techniques are designed to work alongside tissue biopsy, not instead of it.
  • Your oncologist cannot plan surgery, radiation or systemic treatment until tumour type and grade are confirmed from tissue.

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Should you wait for a better technique to become available?

This is the question many families ask, and the honest answer is no — not if a biopsy has already been recommended. The techniques in clinical trials are promising, but none have yet replaced tissue biopsy for initial diagnosis, and most are designed to add information on top of it.

The information your team needs right now comes from a tissue sample. Delaying that to wait for a blood test or a less invasive option could mean starting treatment later, with less information, at a more advanced stage.

Once you have a confirmed diagnosis, ask your oncologist whether liquid biopsy has a role in your case. For some cancers it genuinely adds information tissue alone cannot give — such as detecting a resistance mutation without a repeat surgical biopsy. That conversation is worth having. But it comes after the tissue result, not before.

What these terms mean

Liquid biopsy
A test that looks for cancer DNA or cancer cells in a blood sample, without removing tissue from the tumour. Its main use in current clinical practice is monitoring and resistance detection, not first diagnosis.
ctDNA (circulating tumour DNA)
Fragments of DNA shed by cancer cells into the bloodstream. Liquid biopsy tests detect and analyse these fragments to look for mutations.
cfDNA (cell-free DNA)
DNA from all cells — both normal and cancerous — that circulates freely in the blood. ctDNA is the cancer-specific portion of cfDNA.
Image-guided biopsy
A biopsy where CT, ultrasound or MRI imaging directs the needle precisely to the tumour. It has largely replaced open surgical biopsy for tumours in the lung, liver, kidney and other solid organs.
EUS-FNA / EUS-FNB
Endoscopic ultrasound-guided biopsy. A scope is passed into the stomach or bowel and an ultrasound probe guides a needle through the wall to reach tumours in the pancreas or abdomen — no external surgical cut.
Core needle biopsy
A hollow needle removes a small cylinder of tumour tissue. It gives more material than a fine needle aspiration and is often required for full molecular testing including PD-L1, MSI and TMB.

Did you know?

Whether a tumour sample is large enough to run full molecular testing — PD-L1, MSI, TMB — is one of the most common reasons a biopsy has to be repeated.

The number of needle passes your radiologist takes, and the size of needle used, matters as much as reaching the right spot. Asking your team whether the sample was adequate for molecular testing is a reasonable question after any biopsy.

Source: ASCO and CAP guidance on tumour tissue adequacy for biomarker testing

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Common questions

Frequently asked questions

Can a blood test diagnose cancer instead of a biopsy?

Not yet, and not as a standalone test in India today. Liquid biopsy can detect cancer DNA in the bloodstream, but a positive result cannot tell your team what type of cancer it is, where it started, what grade it is, or what molecular markers it carries — all of which are needed to plan treatment. NCCN and ESMO guidance is clear that tissue biopsy remains the required standard for initial diagnosis. Liquid biopsy plays a real role in monitoring and detecting resistance mutations, but it comes after the tissue result, not before it.

Is liquid biopsy available in Hyderabad and other cities in Telangana and Andhra Pradesh?

Liquid biopsy testing is available through specialist diagnostic labs in Hyderabad and some larger cities. It is not available at all centres, and which specific tests are offered depends on the indication — your cancer type, the clinical question, and which markers are being analysed. Your oncologist will refer you to the appropriate laboratory if liquid biopsy is appropriate for your situation. Ordering it privately without a clinical recommendation is not advised, as the result needs careful interpretation in the context of your full case.

How long does liquid biopsy take to come back?

Turnaround time varies by laboratory and by which specific test is ordered. Results typically take one to two weeks, though some centres batch samples, which can extend the wait. If your team is using the result to guide a time-sensitive treatment decision, ask specifically how long the lab your sample is going to is currently taking — that is more reliable than a general estimate.

When would my oncologist order a liquid biopsy instead of a repeat tissue biopsy?

The main situation is when a cancer that was responding to treatment starts to grow again and the team suspects a resistance mutation has developed. A liquid biopsy at that point can detect the mutation from a blood draw rather than requiring another needle or surgical biopsy — which matters particularly when the tumour is in a difficult location. It is also used in some cancers to monitor for minimal residual disease after treatment. These are clinical decisions your oncologist will make based on your specific cancer type and situation.

What newer biopsy techniques are in development that might reach India?

Multi-cancer early detection tests — which aim to identify several cancers from one blood sample before symptoms appear — are in large international trials. Urine-based liquid biopsy is being studied for bladder and prostate cancer. AI-guided biopsy tools, which help radiologists target the most informative part of a heterogeneous tumour more precisely, are being piloted at specialist centres. None of these are currently cleared by CDSCO for routine clinical use in India. We do not yet know which will reach clinical practice, on what timeline, or what they will cost.

What should I ask my oncologist before having a biopsy?

Ask four things: whether the needle size and number of passes are planned to give enough tissue for full molecular testing; whether the sample will be sent for PD-L1, MSI and TMB testing alongside standard pathology; whether liquid biopsy has any role in your case after the tissue result comes back; and what happens if the result is non-diagnostic — meaning the sample was not adequate. Writing these down before the appointment helps, because biopsy conversations move quickly.

Full index

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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

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Preparing for a Biopsy

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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

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IHC and Molecular Markers

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

Grading and Scoring Systems

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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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