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Familial melanoma: when skin cancer runs in a family | CION Cancer Clinics
Familial melanoma means melanoma has appeared in more members of one family than chance would explain. Sometimes a single inherited gene fault is behind it, most often in a gene called CDKN2A. Often no gene is found at all. This page explains which genes matter, how a family is assessed, what a result changes, and why melanoma in Indian skin tends to hide in unexpected places. At CION Cancer Clinics, our oncologists plan screening and care for families with an inherited cancer syndrome, explained in plain words.
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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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On this page
- What does familial melanoma actually mean?
- Which genes are linked to melanoma running in families?
- How is a family assessed for inherited melanoma?
- The words you will meet, in plain language
- What a gene result changes, and what it does not
- What this page cannot tell you
- Four things families tell us, and what is actually true
- Common questions about familial melanoma
The short answer
What does familial melanoma actually mean?
Familial melanoma means melanoma, the most serious type of skin cancer, has appeared in more members of one family than chance would explain. Usually that means two or more close relatives, or one person with several separate melanomas. In some of these families a single inherited gene fault is behind it. In many others, no single gene is ever found.
How rare this is in India
Melanoma is much less common in India than in fair-skinned countries, and familial melanoma is rarer still. Most of what doctors know about it comes from families in Australia, Europe and North America. Studies of Indian families are few and small, so some advice has to be adapted rather than copied.
Why a family would want to know
A confirmed pattern changes who gets their skin checked, how often, and by whom. In some families it also raises the question of pancreatic cancer, which is linked to the most common melanoma gene. For relatives who turn out not to carry the family fault, it can close the question altogether.
A family pattern is a reason to be watched more closely. It is not a diagnosis.What can sit behind it
Which genes are linked to melanoma running in families?
A handful of genes explain some families. Shared skin type, shared sun habits and chance explain many more.
CDKN2A
The gene most often found in melanoma families. It normally acts as a brake on cell growth. People who carry a fault in it tend to have many moles, melanoma at a younger age, and in some families a raised risk of pancreatic cancer too.
CDK4
A rare cause that works on the same growth brake as CDKN2A. Families with a CDK4 fault look very similar to CDKN2A families, and they are watched in much the same way.
BAP1
Linked to melanoma of the eye as well as the skin, and to a few other cancers. People with a BAP1 fault often have small, raised, skin-coloured bumps that a trained eye can recognise.
Other cancers in the family can include
- Melanoma inside the eye
- Mesothelioma, a cancer of the lining of the lung
- Some kidney cancers
Lower-risk genes and no gene at all
Several other genes nudge risk up a little rather than a lot. In a large share of families, testing finds nothing. The family is then watched from its history, which is still genuinely useful.
Not sure whether this applies to you?
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How is a family assessed for inherited melanoma?
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Someone notices a pattern
Often a dermatologist or oncologist spots it: two relatives with melanoma, one person with more than one, or a melanoma alongside pancreatic cancer or melanoma of the eye in the same family.
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A counsellor draws the family tree
Both sides of the family, every cancer, and roughly how old each person was. Melanoma on the sole of the foot or under a nail counts, and is easily forgotten.
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The affected relative is tested first
Testing the person who had melanoma tells the family whether there is a fault to look for. A blood or saliva sample is enough.
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Relatives follow the result
If a fault is found, relatives can be tested for that exact fault. If none is found, close relatives are still offered regular skin checks based on the history.
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Skin checks become routine
Whatever the result, relatives at raised risk learn to check their own skin and are examined by a specialist at regular intervals.
On your report
The words you will meet, in plain language
- Melanoma
- A cancer of the cells that give skin its colour. It can also start in the eye, the mouth, the nose or the genital area.
- Naevus
- The medical word for a mole. Almost all moles are harmless and stay that way for life.
- Atypical mole
- A mole that looks irregular in shape or colour. It is not cancer, but having many of them raises melanoma risk.
- Acral melanoma
- Melanoma on the palms, the soles of the feet or under a nail. This is the form most often seen in Indian skin.
- Germline
- Present in every cell from birth and therefore inheritable, as opposed to a fault found only inside the tumour.
- Dermoscopy
- Looking at a mole through a lit magnifier that shows patterns under the skin surface the naked eye cannot see.
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Side by side
What a gene result changes, and what it does not
A gene fault is found
No gene fault is found
Relatives can be tested for that exact fault
Close relatives are checked based on the family history
Relatives without the fault can usually step back
No one can be ruled out by a test
Pancreatic checks may be discussed in some families
Pancreatic checks are rarely needed
Skin checks start earlier and are more frequent
Skin checks are still advised for close relatives
Being straight with you
What this page cannot tell you
It cannot tell you whether your family carries a melanoma gene. That question is answered by a genetic counsellor who has drawn out your family tree, confirmed which diagnoses really were melanoma, and arranged a test for the right relative first.
It cannot read a report you are holding
The same gene name can mean very different things depending on the exact variant and how the laboratory classified it. What your specific variant means is a question for the counsellor who ordered the test, not for a search engine.
Who this does not apply to
Most people with a lot of moles do not have familial melanoma. One relative diagnosed with melanoma late in life, with no other pattern, rarely points to an inherited gene. Genetic testing is unlikely to help you, though a skin check still might. A counsellor will say so as readily as they would recommend a test.
If a mole is changing now, do not wait for a genetics appointment. See a dermatologist first.Commonly believed
Four things families tell us, and what is actually true
"Melanoma only happens to fair-skinned people."
It is less common in darker skin, not absent. In Indian skin it tends to appear where the sun does not reach, such as the soles, palms and nails, which is exactly why it is found late.
"Our gene test was negative, so melanoma is not in our family."
A negative test in the affected relative means no known fault was found. It does not undo the family history. Close relatives are usually still advised to have their skin checked.
"Removing all my moles will prevent melanoma."
Most melanomas start in normal skin, not in an existing mole. Removing moles one by one leaves scars and gives false comfort. Watching for change is what actually helps.
"Melanoma is always a black mole."
It can be brown, pink, red or almost skin coloured. In the nail it often appears as a new dark stripe running lengthwise. The warning sign is change, not a particular colour.
Questions we are asked
Common questions about familial melanoma
My father had melanoma. Should I have a gene test?
Usually not on the strength of one relative alone. A test becomes worth discussing when there are two or more relatives with melanoma, one person with several, a young diagnosis, or pancreatic cancer or eye melanoma in the same family. A skin check is still sensible for you.
Who in the family should be tested first?
Wherever possible, the relative who had melanoma. Their result tells everyone else whether there is a specific fault to look for. Testing a well relative first can give a negative result that reassures nobody, because the family fault may never have been identified.
Can a parent pass the gene to a child?
Yes. The genes involved are passed on in a dominant way, which means each child of a carrier has an even chance of inheriting the fault. It passes through fathers and mothers alike, and a carrier can live a long life without ever developing melanoma.
Why would a skin cancer gene affect the pancreas?
The CDKN2A gene acts as a growth brake in many tissues, not just the skin. In some families with a CDKN2A fault, pancreatic cancer appears alongside melanoma. Whether pancreatic checks make sense for you depends on your own family tree, and a specialist should make that call.
Does sunscreen matter if melanoma in India is on the feet?
Sun protection still matters for anyone at raised risk, especially for fairer members of the family and those who work outdoors. It simply does not protect the soles, palms or nails. Checking those areas yourself matters just as much as sunscreen.
Should children in the family be tested?
Gene testing is usually left until a child is old enough to decide, because melanoma in childhood is very rare even in these families. What helps children now is good sun habits and a parent who knows their skin well and notices change.
Is familial melanoma testing covered by insurance?
Coverage for genetic tests varies widely between policies, and many exclude them. Ask your insurer in writing before testing. India also has no dedicated law on genetic discrimination, so raise any worries about future cover with your counsellor first.
Where do I start if melanoma runs in my family?
Write down who had melanoma or pancreatic cancer, on which side, and at roughly what age. Take that list to your oncologist or a genetic counsellor. If you are not sure who to see, the CION helpline will point you to the right clinic.
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
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Sources
- National Cancer Institute — Genetics of Skin Cancer (PDQ) - Health Professional Version
- MedlinePlus Genetics — Melanoma
- MedlinePlus Genetics — CDKN2A gene
- Cancer Research UK — Risks and causes of melanoma
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
Melanoma in Indian skin: where it actually appearsWhy soles, palms and nails matter more hereSkin surveillance and dermoscopyWhat a specialist skin check involvesFamily skin checks and self-examinationHow to check your own skin at homeCDKN2A and pancreatic cancer riskThe pancreas question, answered properly
Talk to us
Does melanoma in your family need a closer look?
Tell us who in your family had melanoma, and at roughly what age. We will tell you honestly whether a genetic referral or a skin check makes sense, and arrange it if it does. One helpline serves every CION centre.