Medical Oncologist
CION Cancer Clinics
Screening a child with a Wilms tumour gene fault: what, how often and until when | CION Cancer Clinics
Children with a gene fault or syndrome that raises Wilms tumour risk are usually offered a tummy ultrasound roughly every three months through early childhood. The aim is to find a tumour while it is small, when kidney-sparing surgery is more often possible. Not every child needs it. This page explains who is offered screening, what each visit involves, when it usually stops, and which signs should never wait. 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 children are offered Wilms tumour screening?
- What does a screening visit involve?
- How does the screening schedule change over time?
- The words you will meet, in plain language
- Four things parents tell us about screening, and what is true
- What this page cannot tell you
- Common questions about Wilms tumour screening
The short answer
Which children are offered Wilms tumour screening?
Screening is offered to young children whose chance of Wilms tumour is judged to be meaningfully higher than that of other children. That usually means a confirmed gene fault or syndrome such as WAGR, Denys-Drash or Beckwith-Wiedemann syndrome. The main test is a tummy ultrasound scan, repeated regularly through the early years.
Why screening is worth doing
A Wilms tumour found on a routine scan is usually smaller than one found because of symptoms. Smaller tumours are more often removed with kidney-sparing surgery, which matters for children whose other kidney is also at risk. Screening does not stop a tumour from forming. It aims to find one sooner.
Who it does not suit
Not every child with a Wilms tumour gene needs scans. Children in lower-risk groups, children past the high-risk years, and adult carriers are usually not scanned for Wilms tumour. A brother or sister who has tested negative for the family fault does not need screening at all. If you are unsure which group your child is in, ask before the first scan is booked.
Screening is a safety net, not a sign that a tumour is expected.At each appointment
What does a screening visit involve?
Most visits are short. Which parts your child needs depends on the gene or syndrome involved.
Tummy ultrasound
The core of screening. A sonographer looks at both kidneys, and often the liver, using a probe on the skin. It is quick, painless and uses no radiation. Each scan is compared with the one before, so keep every report together in one folder.
Liver blood test
Some children with Beckwith-Wiedemann syndrome also have a blood test for a marker called alpha-fetoprotein, to look for liver tumours. Guidelines differ on whether it is needed.
Blood pressure and urine
For children with a WT1 fault, these checks look for early kidney disease, which can matter as much as the tumour risk.
Often includes
- A urine test for protein
- A blood test of kidney function
Growth and development review
The paediatrician checks height, weight, any overgrowth and general development. It is also the moment to raise any worries from home, such as poor feeding, tummy pain or a change in the colour of the urine.
Not sure whether this applies to you?
Ask an oncologistAs your child grows
How does the screening schedule change over time?
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From diagnosis
Once the gene or syndrome is confirmed and the child is judged to be in a higher-risk group, the first tummy scan is booked.
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Through the baby and toddler years
Many centres repeat the scan roughly every three months. Wilms tumour can grow quickly in young children, which is why the gap is kept short.
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In the early years, for some BWS children
Where the liver blood test is used, it usually runs alongside the scans in the first few years and stops earlier than the scans.
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Around school age
Scans usually stop once the child is around seven or eight, when the chance of a new Wilms tumour has fallen close to that of other children.
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Longer term
Children with a WT1 fault continue kidney function checks. Some also need follow-up of the ovaries or testes. Your team will set out what continues.
!
Do not wait for the next scan
If you notice a new lump or swelling in your child's tummy, pink or red urine, or your child seems unwell with tummy pain or a sudden rise in blood pressure, see your child's doctor the same day. Tell them about the gene fault. A tumour can grow between scans, and parents often find it first. Do not press on or massage a lump.
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On your child's plan
The words you will meet, in plain language
- Surveillance
- Regular planned checks in a child who is well, to find a tumour early. It is watching, not treating.
- Screening interval
- The gap between scans. It is kept short in the early years because Wilms tumour can grow quickly.
- Alpha-fetoprotein
- A protein in the blood that can rise when a liver tumour is present. Levels are naturally high in babies and fall with age.
- Kidney-sparing surgery
- Removing only the tumour and keeping the rest of the kidney. It is more often possible when a tumour is small.
- Nephrogenic rests
- Small patches of immature kidney tissue that can sometimes turn into Wilms tumour. They may be seen on scans.
- Incidental finding
- Something seen on a scan that was not being looked for, such as a harmless cyst.
Commonly believed
Four things parents tell us about screening, and what is true
"Scans every few months must be harmful."
Ultrasound uses sound waves, not radiation. It can be repeated as often as needed without harm to the child.
"The last few scans were clear, so we can skip one."
A clear scan only covers that day. Wilms tumour can appear and grow within months, so keeping the interval short is what makes screening work.
"A CT scan would be more thorough."
CT uses radiation and is not needed for routine screening. It is kept for checking something an ultrasound has already found.
"Once screening stops, the gene no longer matters."
The Wilms tumour risk falls, but some genes carry other lifelong concerns, such as kidney function. The gene also matters when your child plans a family of their own.
Being straight with you
What this page cannot tell you
It cannot set your child's schedule. When scans start, how often they repeat and when they stop depend on the exact gene change, your child's signs and your team's reading of the guidelines. What your child's specific result means is a question for the counsellor or geneticist who ordered the test.
Where the evidence is thin
Guidance from North America and Europe differs on some groups, such as whether lower-risk BWS children need scans and whether the liver blood test helps. The studies behind both are small, and there is little published data from Indian children.
Practical questions this page cannot answer
For families travelling from the districts, the right balance between scans done locally and scans at a specialist centre is worth discussing with your team. A consistent sonographer who knows your child, with every earlier report to hand, often matters more than the location.
Ask your team to write down the date each check should stop, so the plan is clear to every doctor your child sees.Questions we are asked
Common questions about Wilms tumour screening
How often will my child need a scan?
In higher-risk groups, many centres scan roughly every three months through the early years. Your team may choose a different gap depending on the gene and guidelines they follow. Ask for the schedule in writing, with the date of the next scan.
Can scans be done near our home?
Often, yes. What matters is a reliable scan at the right interval by someone experienced with children. Bring every previous report, and tell the sonographer about the gene fault. Any worrying finding should be reviewed by the specialist team.
What happens if a scan shows something?
Most findings are harmless, such as a cyst. If a solid lump is seen, your child is referred quickly to a paediatric cancer team for further imaging, usually an MRI, and a treatment plan if needed.
Does screening prevent Wilms tumour?
No. Screening cannot stop a tumour from forming. It aims to find one while it is small, when treatment is simpler and more of the kidney can often be kept.
Why does screening stop around school age?
Wilms tumour grows from kidney cells that are still developing. By school age, that development is largely complete and the chance of a new tumour has fallen close to that of other children.
We missed a scan. What should we do?
Book the next one as soon as you can and carry on with the schedule. One missed scan is not a reason to panic, but long gaps weaken the safety net. Watch for any tummy swelling in the meantime.
Do we need to prepare our child for the scan?
Usually not much. Loose clothing helps. Some centres ask for a short fast before a liver scan. A favourite toy, a feed for a baby, or a video on a phone can help a young child stay still.
Who coordinates the screening?
Usually a paediatrician or paediatric oncologist, working with a clinical geneticist. One named person should hold the schedule and see every result. Call the CION helpline if you are unsure who that is for your child.
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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Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. One helpline books a consultation at any of these centres, and your team will tell you where counselling and testing take place.
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Sources
- GeneReviews (NCBI Bookshelf) — Wilms Tumor Predisposition
- GeneReviews (NCBI Bookshelf) — Beckwith-Wiedemann Syndrome
- MedlinePlus Genetics — WT1 gene
- National Cancer Institute — Wilms Tumor and Other Childhood Kidney Tumors Treatment (PDQ) - Patient 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.
Keep reading
Related pages
Abdominal ultrasound screening in predisposed childrenWhat happens inside the scan roomBeckwith-Wiedemann syndrome and tumour screeningHow the cause of BWS changes the scheduleWilms tumour genes: which cancers and what riskWhy some children need scans and others do notTesting the family for Wilms tumour genesWhether brothers and sisters need testing too
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Need help planning your child's screening scans?
We can help you understand the schedule your child needs and group visits so the journey from the districts is worth it. One helpline serves every CION centre.