Medical Oncologist
CION Cancer Clinics
BAP1 surveillance: which checks carriers need, and when | CION Cancer Clinics
Most BAP1 carriers are offered regular checks of the eyes, the skin and the kidneys, because cancers in these organs can be found small. There is no proven screening test for mesothelioma, so carriers learn its warning signs and avoid asbestos instead. This page explains each check, when it usually starts, and which symptoms should not wait for the next appointment. 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
- What checks does a BAP1 carrier usually need?
- Which checks are usually offered, and by whom?
- When do the different checks usually start?
- What do the terms in a surveillance plan mean?
- What do carriers often misunderstand about their checks?
- What can this page not tell you?
- Common questions about BAP1 surveillance
The short answer
What checks does a BAP1 carrier usually need?
Most BAP1 carriers are offered regular checks of three organs: the eyes, the skin and the kidneys. On top of that, they learn the warning signs of mesothelioma and avoid asbestos, because no screening test for mesothelioma has been proven to help.
Why these organs
An inherited BAP1 fault raises the risk of eye melanoma, skin melanoma, kidney cancer and mesothelioma. Eye, skin and kidney cancers can be found small by looking for them directly, and small tumours are easier to treat. That is the whole purpose of surveillance: finding trouble early, not preventing it.
Why the plan is personal
Guidelines differ between countries and are based on small studies, because BAP1 syndrome is rare. Your own plan depends on your age, which cancers have appeared in your family, and what services you can reach. A genetic counsellor and your oncologist set it with you, and review it as new evidence comes in.
Surveillance finds cancer early. It does not stop cancer from starting.Organ by organ
Which checks are usually offered, and by whom?
Each check is done by a different specialist. Many families from the districts try to book them on the same day.
Eyes
A dilated eye examination, usually once a year, by an eye specialist who knows eye tumours. Drops widen the pupil so the back of the eye can be seen clearly.
Often includes
- Photographs of the back of the eye
- An eye ultrasound if anything looks unusual
Skin
A full skin check by a dermatologist, usually once a year. They look for melanoma, other skin cancers and the small BAP1 skin bumps. Between visits, carriers are taught to check their own skin and to photograph any spot that seems to be changing.
Kidneys
Imaging of the kidneys, usually every year or two, from young adult life. MRI or ultrasound is preferred over CT, to avoid repeated radiation. Blood in the urine or a new pain in the side should be reported without waiting for the next scan.
Chest and abdominal lining
No proven screening test exists for mesothelioma. Some specialist centres add imaging, but the benefit is not yet shown. Knowing the warning signs and avoiding asbestos matter most.
Not sure whether this applies to you?
Ask an oncologistOver a lifetime
When do the different checks usually start?
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Childhood: learning the family plan
Children of a carrier are usually not scanned. Parents are told which age the counsellor suggests for testing, and what to watch for in the meantime.
-
Teenage years: eye checks begin
Eye melanoma is rare in children but can occur young in BAP1 families. For this reason eye checks usually start before adulthood, often once a child who carries the fault is identified.
-
Early adult life: skin checks join
Yearly skin examinations are added. Sun protection becomes a habit, because sunlight damages skin cells.
-
Young adult life: kidney imaging joins
Kidney scans are added, with the interval set by your team. Many carriers have them every year or two.
-
Throughout life: symptoms and asbestos
New breathlessness, chest pain or abdominal swelling are checked quickly. Asbestos is avoided at home and at work, for life.
!
One thing that should not wait for the next scheduled check
If a BAP1 carrier notices a shadow or curtain across part of their vision, new flashing lights, a dark patch that stays, or blurred vision in one eye, they should see an eye doctor the same day or the next. Say that you carry a BAP1 fault. Do not wait for the yearly appointment, even if the last check was recent.
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Words you will hear
What do the terms in a surveillance plan mean?
- Surveillance
- Regular planned checks in someone who is well, to catch a cancer early if one appears.
- Dilated eye examination
- An eye check after drops widen the pupil. Vision is blurred for a few hours, so do not drive home.
- Ocular oncologist
- An eye specialist who looks after tumours of the eye.
- Dermatoscope
- A hand-held magnifier with a light that a dermatologist uses to look closely at spots on the skin.
- Renal MRI
- A scan of the kidneys that uses magnets rather than X-rays, so it can be repeated safely.
- Interval
- The gap between checks. Your team sets it and may shorten it if anything changes.
Commonly believed
What do carriers often misunderstand about their checks?
"A full-body PET-CT scan every year would be safer."
Repeated CT and PET-CT scans add radiation and often show harmless findings that lead to more tests. Targeted checks of the eyes, skin and kidneys are the approach specialists recommend.
"My last check was clear, so I can skip this year."
A clear check covers that day only. Eye and kidney tumours can appear between visits, which is why the interval matters.
"Any eye doctor can do the eye check."
A routine vision test for glasses does not look at the back of the eye in enough detail. Ask for a dilated examination, ideally by someone who sees eye tumours.
"Checks mean I will not get a serious cancer."
Checks improve the chance of finding a cancer early. They are not a promise. Reporting new symptoms quickly is still part of the plan.
Being straight with you
What can this page not tell you?
It cannot give you your own schedule. The ages and intervals above are the usual pattern, not a prescription. Your counsellor and oncologist will adjust them for your family, and for the specialists you can realistically reach. A plan you can keep up for years is worth more than a perfect plan that is abandoned.
It cannot read your report
What your specific variant means is a question for the counsellor who ordered the test. Be sure the result came from a blood or saliva test. A BAP1 change found only in a tumour does not by itself mean you need lifelong checks.
Who this does not apply to
Most people do not need BAP1 surveillance. It is for confirmed carriers, and sometimes for relatives waiting to be tested. Relatives who tested negative for the family's fault usually return to routine care. Someone with a single eye melanoma and no inherited fault is followed for that cancer, not on this plan.
Where the evidence is thin
BAP1 syndrome is rare and was described fairly recently. Studies so far are small. Mesothelioma screening in particular remains unproven, and advice may change.
Questions we are asked
Common questions about BAP1 surveillance
How often will I need checks?
Most carriers have an eye and a skin check once a year, and kidney imaging every year or two. Your team may change these intervals depending on your age, your family history and what earlier checks have shown.
Why MRI for the kidneys rather than CT?
Checks continue for many years. MRI and ultrasound use no X-rays, so they can be repeated without building up radiation. CT may still be used if something needs a closer look.
Can all the checks be done on one day?
Often, if the specialists are in the same city. Families travelling from the districts usually ask for the eye, skin and kidney appointments to be grouped, which saves repeat journeys.
Is there any screening for mesothelioma?
No proven test. Some centres offer imaging of the chest and abdomen, but it has not been shown to help people live longer. Report new breathlessness, chest pain or abdominal swelling promptly, and avoid asbestos.
When should my children start eye checks?
Eye checks usually begin before adulthood in BAP1 families. Your counsellor will suggest when to test children and, for those who carry the fault, when the first eye examination should be.
Does surveillance cost a lot?
It is an ongoing cost, mostly for yearly eye and skin visits and kidney imaging. Ask before starting which parts any insurance or government scheme will cover, and plan for the long term.
What if a check finds something?
Most findings on surveillance are harmless and need only a closer look or a repeat scan. If a tumour is found, it is usually small, which widens treatment options. Your oncologist will explain every next step.
I tested negative for the family fault. Do I need checks?
Usually not. If you do not carry the fault that was found in your family, your risk is generally that of anyone else your age. Confirm this with your counsellor, who will look at the whole family history.
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
- GeneReviews (NCBI Bookshelf) — BAP1 Tumor Predisposition Syndrome
- MedlinePlus Genetics — BAP1 tumor predisposition syndrome
- National Cancer Institute — Intraocular (Uveal) Melanoma Treatment (PDQ) - Patient Version
- National Cancer Institute — Genetics of Skin Cancer (PDQ) - Health Professional Version
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.
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Need help planning BAP1 checks for your family?
We can help you arrange eye, skin and kidney checks and group them so the journey from the districts is worth it. One helpline serves every CION centre.