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CION Cancer Clinics
Multigene panel testing: reading several genes at once | CION Cancer Clinics
A multigene panel checks a group of cancer-risk genes together in one test, instead of one gene at a time. Most people who go for genetic testing today start here. This page explains the three kinds of result a panel can return, how the genes on it are chosen, and who a panel test is unlikely to help. At CION Cancer Clinics in Hyderabad, our oncologists review your family history with you and guide you to the right genetic counselling and testing.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
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The short answer
What is multigene panel testing?
A multigene panel reads a group of genes together in one test, rather than checking one gene at a time. Most people who need genetic testing for cancer risk today start here, because so many different genes can raise risk for overlapping cancers, and checking them one by one would take far too long.
Why testing moved away from one gene at a time
Years ago, a doctor had to guess which single gene was most likely involved and test that one first, often waiting weeks for a result before trying the next candidate. Reading several genes together in one run removed most of that guesswork. It found faults that would otherwise have been missed simply because nobody thought to test that particular gene.
How the genes on a panel are chosen
Panels are usually built around a pattern of cancer, such as breast and ovarian cancer together, or several bowel cancers in one family. Laboratories group genes known to raise risk for that pattern, so the panel matches the story your family history is already telling.
Why one test can now answer several questions at once
Before panels existed, a family with both breast and ovarian cancer might have needed several separate tests, each one aimed at a different candidate gene, run one after another over weeks or months. A panel built around that same pattern checks all the relevant genes in a single sitting, which is a large part of why panel testing has become the usual starting point rather than the exception.
A panel result is not a single answer. It is a list, and most of that list will come back showing nothing of concern.Three kinds of result
What a panel result can actually say
A panel does not return a single yes or no. It returns one of three outcomes for each gene checked.
A pathogenic variant is found
A fault known to raise cancer risk is identified in one of the genes tested. This is the result families expect to hear about, though it is the least common of the three outcomes.
A variant of uncertain significance
A spelling difference is found, but it is not yet known whether it matters. This is a genuinely unfinished result, not a hidden positive, and it should not change treatment or lead to preventive surgery.
Nothing of concern is found
Most people who take a panel test get this result. It lowers the chance of a fault in the genes checked, but it does not remove risk from family history or from genes the panel did not include.
Why the three matter equally
A counsellor treats all three outcomes as real information, not just the first one. What happens next, including whether relatives should be tested, depends on which of the three you receive.
Not sure whether this applies to you?
Ask an oncologistStep by step
What happens between the blood draw and the result
A blood or saliva sample is taken
No fasting and no special preparation is needed. The sample is usually taken at the same visit where the panel is discussed and agreed.
The laboratory reads every gene on the panel
Modern sequencing technology reads all the chosen genes together in one run, rather than one after another, which is what keeps the turnaround time manageable.
Unusual findings are checked and classified
Each spelling difference found is compared against large databases of known variants before the laboratory decides how to classify it in the final report.
A genetic counsellor explains the result
Whatever the panel finds, a counsellor talks it through with you in person, in the context of your own family history, rather than leaving you to read the laboratory report alone.
On your report
The words you will meet, in plain language
- Panel
- A defined group of genes tested together, chosen to match a particular pattern of cancer in the family.
- Pathogenic variant
- A spelling difference known to break a gene's normal instruction. This is what most people mean when they say a gene fault.
- Variant of uncertain significance
- A spelling difference the laboratory cannot yet classify as harmful or harmless. It is not a positive result.
- Negative result
- No fault was found in any gene on the panel tested. It does not mean no risk exists from family history alone.
- Reclassification
- When new evidence changes how a previously uncertain variant is understood, sometimes years after the original test.
- Incidental finding
- A fault found in a gene unrelated to the cancer you were tested for, which some panels report and others are designed not to.
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Did you know
Most people who take a multigene panel receive a result showing nothing of concern in any of the genes checked. A negative panel is the most common outcome, not the exception.
Being straight with you
What this page cannot tell you
It cannot tell you which panel is right for your family. That choice depends on exactly which cancers have appeared, at what ages, and on which side of the family, all of which a genetic counsellor needs to see set out properly before recommending a specific panel.
It cannot interpret a result you are already holding
Panel reports list technical variant names and classifications that read very differently to a specialist than they do to a search engine. If you have a report in hand, bring it to a genetic counsellor rather than searching the gene name online.
Who this does not apply to
Most people do not need a multigene panel. If your family has one relative diagnosed with a common cancer at an ordinary age, and no other pattern, a counsellor is likely to say testing will not change anything useful for you. That advice is not a brush-off; it reflects how these tests actually perform when the family history does not point to a single strong cause.
If you are unsure whether your family history is unusual enough to test, call the helpline and describe it. Someone will tell you honestly whether a referral is worth making.Questions we are asked
Common questions about multigene panel testing
How many genes are usually on a panel?
It depends entirely on the pattern being investigated. Some panels focus tightly on a handful of genes linked to one cancer type, while others are built much wider. Your counsellor chooses the panel size to match your family's specific history.
Is a bigger panel always the better choice?
No. A wider panel finds more uncertain results as well as more genuine faults, and many of those extra genes carry little useful information for your specific family pattern. Your counsellor balances breadth against how much uncertainty is useful to you.
What happens if I get an uncertain result?
It should not change your treatment or lead to preventive surgery. Laboratories review uncertain variants as more evidence accumulates worldwide, so ask your counsellor how and when you would be told if the classification ever changes.
Can a negative panel result still mean I am at risk?
Yes, in a limited sense. A negative result rules out the genes actually tested, but family history itself still counts for something, and some inherited patterns involve genes no current panel yet includes.
Do I need a doctor's referral for a panel test?
Most reputable panel testing is arranged through a genetic counsellor or oncologist, who first checks whether your family history actually meets the criteria for testing before the sample is ever taken.
How long does a panel result take?
It varies by laboratory and by how many genes are included, and can extend further if an unusual variant needs extra confirmation work. Ask your centre for their current timeline when the test is booked.
Will every relative need the same panel?
Not necessarily. Once a specific fault is found in one relative, other family members are usually offered a targeted test for that exact fault rather than repeating the whole panel from scratch.
Where do I start if I think I need a panel?
Write down who in your family was diagnosed, with what, and at roughly what age. Take that to a genetic counsellor or oncologist, or call the CION helpline if you are unsure who to approach first.
Your Specialists
Meet CION's oncologists. Bring your family history or genetic report to them.
Our medical oncologists see people with a strong family history of cancer, arrange genetic counselling and testing where it fits, and plan the checks that follow.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
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Sources
- National Cancer Institute — Genetic Testing for Inherited Cancer Susceptibility Syndromes
- Cancer Research UK — Genetic testing for cancer risk genes
- NCCN — Genetic/Familial High-Risk Assessment Guidelines
- MedlinePlus Genetics — What is genetic testing?
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
How Many Genes Should a Panel Include?The question this page raises but does not settleSmall Panel vs Comprehensive Panel: The Trade-OffWeighing panel size against useful informationTargeted Mutation Analysis: Testing for One Known VariantThe simpler test used once a family fault is already knownWhich Test Would Your Situation Need?A plain guide to choosing between the test types
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Wondering if a panel test fits your family history?
Tell us who was diagnosed and at what age, and we will tell you honestly whether a panel referral is worth making. One helpline serves every CION centre.