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PTCH1 and SUFU: which cancers, and how much risk | CION Cancer Clinics
A PTCH1 or SUFU fault mainly raises the risk of basal cell carcinoma, a slow-growing skin cancer that rarely spreads. SUFU also brings a higher chance of a brain tumour in early childhood and of meningioma. This page sets out each risk, the age at which it matters most, how the two genes differ, and which common cancers they do not seem to affect. 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 a PTCH1 or SUFU fault raise the risk of?
- What is each risk, and how serious is it?
- At what age does each risk matter most?
- The words you will meet, in plain language
- How do the risks differ between PTCH1 and SUFU?
- Four things families tell us, and what is actually true
- What this page cannot tell you
- Common questions about PTCH1 and SUFU cancer risk
The short answer
Which cancers does a PTCH1 or SUFU fault raise the risk of?
Mainly basal cell carcinoma, a slow-growing skin cancer that rarely spreads. The second concern is medulloblastoma, a brain tumour of early childhood, which is a much bigger worry with SUFU than with PTCH1. SUFU carriers also have a raised chance of meningioma, a usually benign growth in the brain lining.
Most of the growths are not cancer
Jaw cysts, and fibromas in the ovary or heart, are benign. They can still need an operation, because of where they sit. They are part of the same condition, Gorlin syndrome, and are often what first brings a family to a doctor.
What these genes do not seem to do
There is no clear evidence that PTCH1 or SUFU faults raise the risk of the common adult cancers, such as breast, bowel or lung cancer. Screening for those follows the same advice as anyone else your age, unless your family history says otherwise.
The risk is real, but it is narrow. It sits mostly in the skin, and in the brain in early childhood.Growth by growth
What is each risk, and how serious is it?
Each of these behaves very differently. Grouping them together makes the condition sound worse than it usually is.
Basal cell carcinoma
The main cancer in Gorlin. Many carriers develop several over a lifetime, starting in the teens or twenties. They grow slowly and very rarely spread, but can damage skin and nearby tissue if left alone.
Makes it more likely
- Fair skin
- Years of strong sun
- Past radiotherapy to that area
Medulloblastoma
A brain tumour that appears in early childhood, if it appears at all. It is uncommon with PTCH1. With SUFU the risk is substantially higher, which is why young SUFU carriers are offered regular brain MRI.
Meningioma
A usually benign growth in the lining around the brain, seen more often in SUFU carriers and after radiation to the head. Many never cause symptoms and are simply watched.
Benign growths
Jaw keratocysts, ovarian fibromas and, in babies, heart fibromas are not cancer. They can press on nearby structures, so they are checked and sometimes removed.
Not sure whether this applies to you?
Ask an oncologistAcross a lifetime
At what age does each risk matter most?
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Infancy
A heart fibroma can be present from birth, and a heart scan in the first months picks it up. Most babies with Gorlin have a normal heart.
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Early childhood
This is the window for medulloblastoma. Once a child is past the early school years, the risk falls sharply, and brain scans usually stop.
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The teenage years
Jaw cysts are the main finding. They can loosen teeth or swell the jaw, and often return after removal.
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Adult life
Basal cell carcinomas become the main issue and can keep appearing for decades. Ovarian fibromas may be found in women, usually on a scan done for another reason.
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After radiation, at any age
Skin in a radiotherapy field can develop crops of new skin cancers, sometimes many years later. This risk never fully goes away.
On your report
The words you will meet, in plain language
- Penetrance
- How often a fault actually leads to a problem across everyone who carries it. It differs between PTCH1 and SUFU.
- Lifetime risk
- The chance of a given growth appearing at some point in life, not in the next few years.
- Benign
- Not cancer. A benign growth does not spread, though it may still need treating.
- Fibroma
- A firm, benign lump of fibrous tissue, seen in the ovary or heart in Gorlin.
- Hedgehog pathway
- The growth signal PTCH1 and SUFU normally keep switched off. Some skin cancer tablets work by blocking it.
- Pathogenic variant
- A change known to break the gene's instruction. A positive result means one was found.
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Side by side
How do the risks differ between PTCH1 and SUFU?
PTCH1 fault
SUFU fault
Many skin cancers are common
Skin cancers occur, often fewer
Jaw cysts are a hallmark
Jaw cysts are less frequent
Childhood brain tumour is uncommon
Childhood brain tumour is a leading concern
Meningioma is occasional
Meningioma is more frequent
Commonly believed
Four things families tell us, and what is actually true
"A cancer gene means every kind of cancer is more likely."
Each gene raises the risk of particular cancers. For PTCH1 and SUFU that is mostly skin, and the brain in early childhood. Your chance of the common adult cancers is not clearly changed.
"Skin cancer is always deadly."
Basal cell carcinoma is the mildest kind of skin cancer. It very rarely spreads, and most are removed completely with minor treatment when found small.
"My child is past the danger age, so nothing more is needed."
The brain tumour risk does fall after early childhood. The skin and jaw risks are only starting in the teens, so checks carry on, just for different things.
"Online figures tell me my exact risk."
Published figures come from small studies, mostly in fair-skinned families overseas. They may not fit an Indian family. Studies so far are small, and your counsellor will say so.
Being straight with you
What this page cannot tell you
It cannot give you a personal risk figure. Your risk depends on which gene is involved, the exact change, your skin type, your sun exposure and whether you have ever had radiation. What your specific variant means is a question for the counsellor who ordered the test.
It cannot tell you whether a new spot is cancer
Only a dermatologist can do that, usually by looking closely and sometimes by taking a small sample. If a spot bleeds, grows or does not heal, show it rather than waiting for your next routine check.
Who this does not apply to
If you have had a single basal cell carcinoma later in life, with no jaw cysts and no family pattern, this page almost certainly does not describe you. Basal cell skin cancer is common, and very few people who have one carry an inherited fault. For gene tests on a tumour to guide treatment, see targeted therapy.
Not sure whether your history fits? Call the helpline and describe it. Someone will tell you honestly whether a referral is worth making.Questions we are asked
Common questions about PTCH1 and SUFU cancer risk
Will I definitely get skin cancer?
Not definitely. Many carriers do develop basal cell carcinomas, but people with darker skin tend to have fewer and later ones. Sun protection and regular skin checks mean most are found small, when treatment is simple.
Can basal cell carcinoma spread to other organs?
Very rarely. It tends to grow slowly in the skin where it started. Left alone for years, it can grow deep and damage nearby tissue, which is why early treatment matters even though it is rarely dangerous to life.
How worried should I be about my child's brain?
That depends mostly on the gene. With PTCH1 the risk is low, and teams differ on whether scans are needed. With SUFU the risk is higher, and regular brain MRI in early childhood is usually advised. Your counsellor will explain which applies.
Are jaw cysts a form of cancer?
No. Keratocysts are benign. They can still weaken the jaw, loosen teeth or become infected, so they are removed. Because they often come back, a dental or maxillofacial surgeon who knows about Gorlin should keep watch.
Does Gorlin raise my risk of breast or bowel cancer?
Not in any clear way. Screening for those cancers follows the usual advice for your age and family history. If other cancers run in your family, mention them, because a separate gene could be involved.
Can radiation from scans raise my risk?
It can. Radiation can trigger new skin cancers in the area it passes through. Ask whether an MRI or ultrasound can answer the question instead of a CT scan. Tell every doctor and dentist that you have Gorlin syndrome.
Are there treatments that lower the risk?
Nothing removes the gene fault. Sun protection and avoiding radiation lower the number of skin cancers. For people with many skin cancers, tablets that block the hedgehog growth signal can shrink them, though side effects mean they are not for everyone.
Where do I start if I have just been told I carry the fault?
Ask for a meeting with a genetic counsellor and a dermatologist. Bring a list of any skin cancers, jaw cysts or brain scans in the family. Call the CION helpline if you are not sure who to see, and someone 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)
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Sources
- GeneReviews (NCBI) — Nevoid Basal Cell Carcinoma Syndrome
- National Cancer Institute — Genetics of Skin Cancer (PDQ) - Health Professional Version
- MedlinePlus Genetics — Gorlin syndrome
- MedlinePlus Genetics — SUFU gene
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
Gorlin syndrome explainedThe whole condition, not just the cancersWhy Gorlin patients must avoid radiation where possibleThe one risk you can do the most aboutSurveillance for PTCH1 and SUFU carriersWhich checks happen, and from what ageThe PTCH1 and SUFU genes: what they doWhy a faulty brake gene causes these growths
Talk to us
Worried about what a PTCH1 or SUFU result means for your child?
Tell us which gene was found and who in the family is affected. We will help you reach a counsellor and the right specialists, and arrange it if you want us to. One helpline serves every CION centre.