Medical Oncologist
CION Cancer Clinics
RB1 surveillance: what is checked, and when | CION Cancer Clinics
Surveillance for an RB1 carrier changes with age. In early childhood it means frequent eye examinations to find retinoblastoma while tumours are small. Later it means regular reviews, knowing the signs of the other cancers linked to RB1, and using scans carefully. This page sets out what is checked at each stage of life, why, and which symptoms should never 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 surveillance does an RB1 carrier need?
- Which parts of the body are watched, and why?
- How does surveillance change as a carrier grows up?
- The terms in a surveillance plan, in plain language
- Four things families tell us, and what is actually true
- What this page cannot tell you
- Common questions about surveillance for RB1 carriers
The short answer
What surveillance does an RB1 carrier need?
It changes with age. In early childhood the focus is the eyes, with frequent examinations to find tumours while they are small. As the child grows, attention shifts to the other cancers linked to RB1, through regular reviews, knowing the warning signs and careful use of scans.
Why the plan changes with age
Retinoblastoma is a cancer of young children. After early school age, new eye tumours are rare. The raised chance of bone and soft tissue cancers shows up later, mostly from the teenage years. Watching for the right thing at the right age avoids missed cancers and avoids needless tests.
Carriers who never had a tumour
Some parents and relatives carry an RB1 fault and never had retinoblastoma. Whether they share the same raised chance of other cancers is less clear, and studies so far are small. Their plan is usually decided case by case, and their children still need screening.
No single schedule is agreed worldwide for adults. Ask for your plan in writing and have it reviewed as you get older.What is checked
Which parts of the body are watched, and why?
Each part of the plan looks for a different problem, at the age when it is most likely to appear.
The eyes
In childhood, examinations with the pupils widened find small tumours before they affect sight.
Usually involves
- Drops to widen both pupils
- An awake check for young babies
- A short anaesthetic as the child grows
The brain
Some centres advise MRI scans in early childhood to look for a rare tumour in the pineal gland. Practice varies, and your team will explain its view.
Bones and soft tissue
From the teenage years, regular reviews and prompt checks of bone pain or lumps. Some centres add whole-body MRI, though its benefit is not yet proven.
The skin
Melanoma is linked to RB1, so skin checks at reviews and your own checks for new or changing moles both matter.
Not sure whether this applies to you?
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One thing that cannot wait
If a young child who carries RB1 has headaches with vomiting, especially in the morning, is unusually drowsy, or their head seems to be growing fast, go to an emergency department the same day and say the child carries RB1. These can be signs of pressure inside the head. Do not wait for the next scheduled scan.
From birth to adult life
How does surveillance change as a carrier grows up?
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From birth
Eye examinations begin in the first weeks and are closest together in the first year. Newborns are often examined awake. Older babies usually need a short anaesthetic.
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Early childhood
Eye checks spread further apart. Some centres add brain MRI scans in these years. A child already treated for retinoblastoma also has follow-up of the treated eye.
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Early school age
Eye screening for new tumours usually ends, as they have become unlikely. Routine eye care continues, especially if sight was affected.
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The teenage years
The focus moves to bone pain and lumps. This is a good time to give the young person their own treatment summary and explain their RB1 result.
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Adult life
A regular review with a doctor who knows the history, skin checks, no tobacco, and radiation only when it is needed. Their own children are offered testing.
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Words you will hear
The terms in a surveillance plan, in plain language
- Surveillance
- Planned checks for someone at higher risk, to find a problem early. It is not a treatment.
- Examination under anaesthesia
- An eye check done while the child is briefly asleep, so the whole retina can be seen.
- Pineal gland
- A small gland deep in the brain. Rarely, children with inherited retinoblastoma develop a tumour here.
- Trilateral retinoblastoma
- Retinoblastoma in the eyes together with a tumour in the pineal gland. It is rare.
- Whole-body MRI
- A scan of the whole body using magnets rather than radiation. Some centres offer it to carriers.
- Low-penetrance variant
- An RB1 fault that causes tumours in fewer carriers than usual. It can change how intensive checks need to be.
Commonly believed
Four things families tell us, and what is actually true
"Once the eye checks end, surveillance is over."
The eye checks end because new eye tumours become rare. The raised chance of other cancers continues into adult life, so a lighter kind of surveillance carries on.
"More scans mean more safety."
CT scans and X-rays use radiation, which carriers are more sensitive to. Frequent scans also find harmless things that lead to more tests and worry. Each scan should answer a clear question.
"A carrier who never had a tumour needs nothing."
They may need less than a survivor. Their children still need testing and eye checks, and they should keep their own doctors informed of their result.
"Surveillance means travelling to a big city every time."
Childhood eye checks do need a specialist team. Much of adult surveillance, such as reviews and self-checks, can often happen closer to home, as long as records travel with you.
Being straight with you
What this page cannot tell you
It cannot give you a personal schedule. How often a carrier is checked depends on age, whether they have had retinoblastoma, whether they had radiotherapy and the exact variant in the family. Your eye team and oncologist set that plan together.
It cannot read your report
What your specific variant means is a question for the counsellor who ordered the test. Some RB1 variants cause tumours in fewer carriers, and that can make the plan lighter.
Who this does not apply to
Relatives who have tested negative for the family's known fault do not need RB1 surveillance. Survivors of a one-eye tumour whose testing found no RB1 fault usually need routine follow-up only. Most people reading about retinoblastoma for a relative will not need this plan themselves.
Keep one folder with the genetic report, eye reports and treatment summary. Bring it to every new doctor.Questions we are asked
Common questions about surveillance for RB1 carriers
How often does a child who carries RB1 need eye examinations?
Most often in the first year of life, then less often through early childhood. The exact gap between checks depends on the child's age, the family variant and what earlier checks found. The eye team gives you a written schedule and updates it at each visit.
Does my child need brain scans?
Some centres offer MRI brain scans in early childhood to look for a rare pineal gland tumour. Others do not, because the benefit is uncertain. Ask your team for its view, and make sure any scan is an MRI rather than a CT scan.
When do the eye checks stop?
Screening for new eye tumours usually stops around early school age, when they have become unlikely. A child who was treated for retinoblastoma continues with follow-up of the treated eye, and routine eye care carries on for everyone.
What should an adult carrier do each year?
See a doctor who knows your history, have your skin checked, and mention any bone pain, lump or change in an area that had radiotherapy. Avoid tobacco. Ask whether each scan uses radiation. If you plan children, see a genetic counsellor first.
Can surveillance happen nearer our home in a district?
Specialist eye checks for young children need a team experienced in retinoblastoma, which usually means travel. Adult reviews can often be shared with a local doctor, as long as your records and your RB1 result go with you.
Are CT scans safe for RB1 carriers?
They are avoided where an MRI or ultrasound can answer the same question, because carriers are more sensitive to radiation. In an emergency, a CT scan may still be the right choice. Always tell the team that you carry RB1.
What if we miss a scheduled eye check?
Call the eye team and rebook as soon as you can. Do not simply wait for the next date on the schedule, because the gap between checks is planned to catch tumours while they are small. Tell them if travel or cost is the problem.
Does the plan change if my child has already been treated?
Yes. The treated eye needs its own follow-up for any regrowth, and the other eye is still screened. If radiotherapy was used, later reviews pay closer attention to the treated area.
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) — Retinoblastoma
- National Cancer Institute — Retinoblastoma Treatment (PDQ) – Health Professional Version
- American Cancer Society — Retinoblastoma
- MedlinePlus Genetics — Retinoblastoma
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
Screening siblings and children of a survivorThe childhood eye checks in more detailSecond cancer surveillance for survivorsWhat adult surveillance looks for, and whyExamination under anaesthesia for screeningWhat happens on the day of an EUARB1 testing cost in HyderabadWhat testing and checks usually cost
Talk to us
Need help setting up a surveillance plan?
Tell us the carrier's age, their RB1 result and any treatment they have had. We will help you find the right teams and explain what the plan should include. One helpline serves every CION centre.