Medical Oncologist
CION Cancer Clinics
TP53 mutation: which cancers, and how high the risk is | CION Cancer Clinics
An inherited TP53 fault causes Li-Fraumeni syndrome, one of the highest-risk inherited cancer conditions known. The cancers seen most often are breast cancer in young women, sarcomas, brain tumours and adrenal cancer, and some start in childhood. This page sets out which cancers appear at which stage of life, why the risk differs between carriers, and what a figure on a website cannot tell you. At CION Cancer Clinics, our oncologists explain what a gene result means for you and your family, and plan the checks that follow.
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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
- Which cancers does an inherited TP53 fault cause?
- The four cancers doctors watch for most closely
- How the risk changes from childhood to later life
- The words you will meet, in plain language
- What tends to raise or lower one carrier's risk
- What this page cannot tell you
- Four things families tell us, and what is actually true
- Common questions about TP53 cancer risks
The short answer
Which cancers does an inherited TP53 fault cause?
An inherited TP53 fault raises the risk of many different cancers, not just one. The four that appear most often are breast cancer in young women, sarcomas of bone and soft tissue, brain tumours and cancer of the adrenal gland. The risk starts in childhood and continues through adult life.
Why this gene carries so much risk
TP53 makes a protein that acts as the cell's emergency brake. When DNA is damaged, it pauses the cell, calls in repairs, or tells a badly damaged cell to die. Almost every tissue relies on it. When one copy is faulty from birth, cells in many organs lose part of that protection, which is why the list of cancers is so long.
Why one family looks different from another
Two families with a TP53 fault can have very different histories. The exact variant matters, and so does chance. Some families see cancers in young children. Others see mostly breast cancer in women in their thirties. Your counsellor will look at your own family, not an average.
How high is high?
Over a lifetime, the chance of cancer for a carrier is far above that of the general population, and higher than for most other inherited faults. Many carriers also develop more than one cancer. The exact figure depends on the variant, on sex and on the family, which is why this page gives no single number.
A high risk is not a certainty. It is the reason carriers are offered careful, regular checks.The core cancers
The four cancers doctors watch for most closely
These are called the core cancers of Li-Fraumeni syndrome. Together they make up most of the cancers seen in carriers.
Breast cancer
The most common cancer in women who carry the fault, and often the first one. It tends to appear well before menopause, frequently in the twenties or thirties. Men carry a much smaller breast risk.
Sarcoma
Cancers of bone, muscle and other connective tissue. Bone sarcoma is more typical in teenagers. Soft tissue sarcomas can appear at any age, from early childhood onwards. A new lump that keeps growing, or bone pain that wakes a child at night, should be checked promptly.
Brain tumours
Several types, at different ages. Some rare childhood brain tumours are so strongly linked to TP53 that finding one is enough reason to offer testing.
Can include
- Choroid plexus tumours in young children
- Medulloblastoma in children
- Gliomas in older children and adults
Adrenal cortex cancer
A rare cancer of the small glands above the kidneys. In a young child it points strongly to an inherited TP53 fault, even when nobody else in the family has had cancer.
Not sure whether this applies to you?
Ask an oncologistAcross a lifetime
How the risk changes from childhood to later life
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Early childhood
Adrenal cortex cancer, choroid plexus tumours and soft tissue sarcomas such as rhabdomyosarcoma are the main concerns. This is why some families are offered testing and checks for children.
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Teenage years
Bone sarcoma, usually osteosarcoma, becomes more likely during the growth spurt. Pain in a bone that does not settle deserves a prompt check.
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Young adult women
Breast cancer becomes the leading risk, often decades earlier than in the general population. This drives early breast MRI for carriers.
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Adult life
Brain tumours, sarcomas and leukaemia remain possible. Cancers of the lung, bowel, stomach, pancreas and skin are also seen more often than expected.
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After a first cancer
Many carriers develop a second, separate cancer. This is a new cancer, not a spread of the first, which is why checks continue after treatment ends.
On your report
The words you will meet, in plain language
- Li-Fraumeni syndrome
- The name for the pattern of cancers caused by an inherited TP53 fault. Doctors often shorten it to LFS.
- Germline
- Present in every cell from birth and able to pass to children. This page is only about germline TP53 faults.
- Core cancers
- Breast cancer, sarcoma, brain tumours and adrenal cortex cancer. The ones most closely tied to the syndrome.
- Penetrance
- How often a fault actually leads to cancer across everyone who carries it. For TP53 it is high, but it is never all carriers.
- Multiple primary cancers
- Two or more separate cancers in one person, each starting on its own. Common in TP53 carriers.
- Clonal haematopoiesis
- A TP53 change that builds up in blood cells with age or after chemotherapy. It can show on a blood test but is not inherited.
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What tends to raise or lower one carrier's risk
Tends to mean higher risk
Tends to mean lower or later risk
A variant known to switch the gene off badly
A milder variant that keeps some function
Relatives diagnosed as young children
Relatives diagnosed mainly in adult life
Being female, because of breast cancer
Being male, where breast risk is small
Past radiotherapy to part of the body
Scans planned around MRI and ultrasound
Smoking or chewing tobacco
No tobacco in any form
Being straight with you
What this page cannot tell you
It cannot give you a personal risk figure. Published numbers come from families who were studied because they had a lot of cancer, so they may overstate risk for families found in other ways. What your specific variant means is a question for the counsellor who ordered the test.
Who this does not apply to
Most people with TP53 on a report do not have Li-Fraumeni syndrome. A TP53 change found only inside a tumour is very common and is not inherited. That result belongs with your treating oncologist and the tumour testing pages, not here.
When a blood result needs a second look
In older adults, or after chemotherapy, a TP53 change can appear in blood cells alone. It may not be in the rest of the body at all. The laboratory can often tell from how strongly the change shows, and a second sample such as skin may be tested to settle it.
Commonly believed
Four things families tell us, and what is actually true
"TP53 is a breast cancer gene."
Breast cancer is only one part of it. Men and children in the family carry real risks too, for sarcoma, brain tumours and other cancers. Checks are planned for the whole body, not one organ.
"She has already had cancer, so the risk is used up."
Surviving one cancer does not lower the risk of another. Second cancers are common in carriers, which is why checks continue for life after treatment ends.
"Children are too young to be affected."
Some TP53 cancers mainly affect young children. That is one reason this is among the few syndromes where testing a child is often discussed early.
"My tumour report says TP53, so my family is at risk."
A TP53 change inside a tumour is one of the most common findings in cancer and usually arose in that tumour alone. Only a blood or saliva test for inherited faults can answer the family question.
Questions we are asked
Common questions about TP53 cancer risks
Will I definitely get cancer if I carry a TP53 fault?
No, though the risk is high and higher than for most other inherited faults. Some carriers live long lives without cancer. Regular checks aim to find any cancer early, when treatment has the best chance of working.
Is the risk the same for men and women?
Overall it is higher for women, mainly because of breast cancer at a young age. Men still carry raised risks of sarcoma, brain tumours and other cancers, and they pass the fault on in exactly the same way.
Which cancers appear in childhood?
Adrenal cortex cancer, choroid plexus tumours, other brain tumours and soft tissue sarcomas are the main ones. They are rare overall, but when one appears in a young child, doctors often consider TP53 testing even without a family history.
Does TP53 raise the risk of leukaemia?
Yes, leukaemia is seen more often in carriers, including in children. It can also follow earlier chemotherapy or radiotherapy. Your haematologist and oncologist keep this in mind when planning treatment and follow-up.
Why do my relatives' cancers look so different from mine?
The same fault can lead to different cancers in different people, at different ages. Chance plays a large part. That is why checks cover many organs rather than following one relative's history.
Can lifestyle lower my risk?
It cannot remove the inherited risk. Avoiding tobacco, limiting alcohol, keeping out of strong sun and avoiding unnecessary radiation all help. The biggest single step is keeping up with the checks your team plans.
Are risk figures from Western studies true for Indian families?
Most published figures come from Europe and North America. Indian data are limited and studies so far are small. The overall pattern of cancers appears similar, but your counsellor will rely on your own family history as much as on any figure.
Where do I start after reading this?
If a relative has a confirmed TP53 fault, ask for a genetic counselling appointment. Bring the relative's report and a list of who in the family had cancer, and at what age. The CION helpline can 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)
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Sources
- GeneReviews (NCBI) — Li-Fraumeni Syndrome
- MedlinePlus Genetics — Li-Fraumeni syndrome
- MedlinePlus Genetics — TP53 gene
- NCCN — Genetic/Familial High-Risk Assessment: Breast, Ovarian, Pancreatic, and Prostate
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
The TP53 gene: what it does and why it mattersHow the cell's emergency brake works, before the risksWhole-body MRI surveillance for TP53 carriersThe checks that follow from these risksGermline TP53 vs a TP53 change in the tumourCheck which kind of result you actually haveWhy TP53 carriers avoid radiation where possibleHow the risk changes scan and treatment choices
Talk to us
Has someone in your family tested positive for TP53?
We can arrange genetic counselling to explain what the result means for you and for each relative, and plan the checks that follow. One helpline serves every CION centre.