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Molecular & Genomic Testing

Sending Your Biopsy Sample — Abroad for Testing

Services that ship biopsy samples to the US or UK for testing are actively marketed to families of cancer patients in India. For most patients, the same test is now available at an accredited Indian laboratory, and the result is clinically comparable.

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

  • It is possible — Your preserved tissue block can be shipped internationally through specialist medical couriers.
  • Rarely necessary now — Accredited Indian laboratories now perform the same genomic tests as leading US and UK centres.
  • It adds weeks — Shipping, customs clearance, and overseas processing add significantly to an already lengthy wait.
  • The cost is substantially higher — Overseas testing adds courier fees and much higher laboratory charges on top of the test cost itself.
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Sending your biopsy sample abroad for molecular testing is possible, but for most patients it is no longer necessary. Indian laboratories accredited by international bodies now run the same genomic and biomarker tests as leading US and UK centres. The cases where overseas testing adds genuine value are narrow — ask your oncologist whether yours is one of them.

Can you send a biopsy sample abroad for testing?

Yes, it is physically possible. Your pathology laboratory stores your biopsy tissue in a preserved block called an FFPE block. A specialist medical courier can ship this internationally, with the chain-of-custody documentation that overseas laboratories require.

For most patients in India, it is no longer necessary. Indian molecular pathology laboratories accredited by NABL — and in some cases by the College of American Pathologists — now perform the same genomic and biomarker tests as leading centres in the United States and United Kingdom. The validated assays and equipment are the same; the result is clinically comparable.

The cost difference remains significant. Overseas testing costs substantially more than equivalent testing in India, and the quality gap that once justified the expense has narrowed considerably.

When does overseas testing actually add something?

There are narrow situations where it may be genuinely useful. If you have an extremely rare tumour type for which a specific assay is not yet validated at any Indian laboratory, an international reference laboratory with an established dataset may interpret the result more reliably.

If a clinical trial based abroad requires results from a specific designated laboratory as part of its eligibility criteria, testing there may be a requirement of the trial itself rather than a preference.

In both situations the decision should come from your treating oncologist, not from a commercial sample-shipping service. If overseas testing has not been recommended, it is reasonable to ask your oncologist directly whether a local accredited laboratory is appropriate for your situation — and to expect a clear answer.

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What do the terms used in this area mean?

FFPE block
The preserved piece of your tumour tissue that the pathologist stores after a biopsy. This is the standard material shipped for molecular testing, whether the laboratory is in India or abroad.
NABL accreditation
India's national accreditation for testing and calibration laboratories. A NABL-accredited molecular laboratory meets internationally recognised quality standards for the assays it is approved to run.
CAP accreditation
A quality standard from the College of American Pathologists. Indian laboratories can hold this, meaning they meet the same standard required of US hospital laboratories.
Chain of custody
A documented record showing who handled your sample and when, from the hospital to the testing laboratory and back. Overseas laboratories require this for the result to be medically valid and usable by your team.
Turnaround time
How long the test takes from when the laboratory receives your sample to when the result is ready. Overseas testing adds international shipping time in both directions on top of the laboratory's own processing time.
Comprehensive genomic profiling
A test that reads large sections of your tumour's DNA in one run to identify multiple mutations simultaneously. This is often the test families are seeking when they research overseas testing, and it is now available at accredited Indian laboratories.

Did you know?

Several Indian molecular pathology laboratories now hold CAP accreditation — the same international quality standard required of US hospital laboratories.

For most genomic tests your oncologist is likely to order, a result from an accredited Indian laboratory is clinically comparable to one from an overseas centre.

Source: College of American Pathologists; National Accreditation Board for Testing and Calibration Laboratories (NABL)

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Common questions

Frequently asked questions

How do you actually send a biopsy sample abroad?

Your hospital's pathology department releases the FFPE block or prepared slides on written request. A specialist medical courier experienced in biological samples handles the international shipment, along with the chain-of-custody and customs documentation the overseas laboratory requires. The result comes back electronically, and the original material is returned if it has not been consumed by the test. The whole process typically adds two to four weeks to your timeline, on top of the overseas laboratory's own processing time. Your hospital's pathology department will need a formal request before releasing the block, so speak to your oncologist first.

What does it cost to send a sample abroad for testing?

Costs are indicative and change frequently, so any figure quoted here would be dated before it reaches you. What is consistent is the structure: the overseas laboratory's test fee is typically several times the equivalent cost at an accredited Indian laboratory, and that is before specialist courier charges, customs handling fees, and any administrative fee your hospital may apply for releasing the block. Ask for a written quote that itemises every component, and compare it against a quote for the same test at an accredited Indian laboratory your oncologist recommends.

Is the quality of molecular testing in India as good as in the US or UK?

For the tests most commonly ordered in cancer care, yes. Indian laboratories accredited by NABL, and those holding CAP accreditation from the College of American Pathologists, use the same validated assays and the same equipment as comparable overseas centres. Accreditation requires participation in external quality-assurance programmes, so a result from an accredited Indian laboratory is not a lesser substitute — it is produced to the same quality standard. The specific laboratory your oncologist recommends matters more than the country it is located in.

Will an overseas test result be accepted by my oncologist in India?

Yes, if the overseas laboratory is internationally accredited and the full technical report is provided. Your oncologist needs the complete report, not a summary letter, to make treatment decisions from it. What does not follow is that an overseas result carries any automatic weight over an equivalent result from an accredited Indian laboratory. The oncologist is interpreting the biomarker findings — the laboratory's address does not change what the findings mean for your treatment.

How much time does overseas testing add?

Shipping in both directions, customs clearance, and any administrative processing at the overseas laboratory typically adds two to four weeks to what is already a multi-week process. In cancer care that time is not neutral — treatment planning is usually waiting on the result. This is one practical reason your oncologist may recommend an accredited Indian laboratory rather than an overseas one, even when both could technically perform the same test.

Which patients genuinely need overseas testing?

The number is small and the situations are specific. Patients with extremely rare tumour types where an overseas laboratory has the only validated assay for a particular mutation, and patients seeking eligibility for a clinical trial abroad that requires testing at a designated laboratory, are the clearest examples. If overseas testing is genuinely indicated for you, your oncologist will say so and will specify which laboratory to use. If you are researching it independently because a service or someone suggested it, raise it directly with your oncologist — not to be dismissed, but to get a clear answer about whether your situation is one of the exceptions.

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