Medical Oncologist
CION Cancer Clinics
What to say about a family gene, at what age | CION Cancer Clinics
The right words about a family gene depend on your child's age. Young children need reassurance and one simple sentence. Teenagers can hear the real words and should have a say. Young adults need the full facts and their own choice about testing. This page walks through each stage, with sample sentences, the messages every child needs, and signs that a child needs more support. At CION Cancer Clinics, our team helps carriers and their families plan checks, next steps and support after a genetic result.
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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 should you tell a child about a family gene, at each age?
- What can children understand at each stage?
- What does every child need to hear, whatever their age?
- What might you actually say at each age?
- How can you tell a child needs more support?
- What this page cannot tell you
- Four ideas parents hold, and what is actually true
- Common questions about talking to children by age
The short answer
What should you tell a child about a family gene, at each age?
Match the words to the stage. Young children need reassurance and one simple sentence. School-age children can learn that bodies follow instructions passed down in families. Teenagers can hear the real words and should have a say. Young adults need the full facts and the choice about testing.
Why age matters so much
A small child thinks in terms of now: who will look after me, and did I cause this? An older child can think about chance and the future. A teenager wants privacy and control. The same fact lands very differently at each point, so the words you choose need to change as your child grows.
Ages are a guide, not a rule
Children mature at different rates. A quiet ten-year-old may need less than a curious seven-year-old. A child whose parent is in treatment often needs more, earlier, because they can already see that something is wrong. Watch your own child and follow their questions.
You do not need to get it perfect. You need to keep the conversation going.Stage by stage
What can children understand at each stage?
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Before school
Young children understand "ill" and "better", not genes. Keep it about the parent and the routine. They need to hear who will look after them, and that nothing they did or thought caused it.
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Early school years
Children can grasp that bodies follow instructions, and that they look like their parents for a reason. Some worry that illness is catching. Tell them clearly that it is not.
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The pre-teen years
Now they can understand "passed down", "a higher chance" and "check-ups". Many ask directly whether they will get it. Answer honestly: nobody knows, and they can decide about a test when they are grown up.
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Teenagers
Teenagers can handle the real words: gene fault, carrier, risk. They will probably search online, so offer to read reliable pages together. Include them in decisions about who else in the family is told.
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Young adults
They can have the full facts, meet a counsellor and decide about testing for themselves. Questions about marriage and career often surface now, and they deserve accurate information before those talks begin.
Not sure whether this applies to you?
Ask an oncologistAt every age
What does every child need to hear, whatever their age?
The words change as children grow. These four messages do not.
It is nobody's fault
Children quickly look for someone to blame, often themselves or one parent. Say plainly that genes are passed on by chance and nobody chose this.
We are being looked after
Name the doctors, the check-ups and the plan. Children feel safer when they know adults are in charge of the problem.
You do not need to do anything now
For most inherited faults, there is no test or treatment for a child. Say this clearly, so they do not carry a job they cannot do.
If your family has one of the rare syndromes that affect childhood, your child's doctors will explain what is needed.You can ask me again, any time
Children return to big news in small pieces, often weeks later. Make it clear that no question is silly, and that the subject is not closed.
Words you could use
What might you actually say at each age?
- Before school
- "Amma has to see the doctor more often. The doctors are looking after her. You did not do anything to cause this."
- Early school years
- "Our bodies follow tiny instructions we get from our parents. One of mine has a small mistake. It is not catching."
- Pre-teens
- "Some people in our family have a higher chance of certain illnesses. Doctors check us regularly so anything is found early."
- Teenagers
- "I carry a gene fault. You might carry it too, or you might not. When you are an adult, you can decide whether to find out."
- Young adults
- "Here is my report and the family letter. A counsellor can explain what it means for you, and help you decide about testing."
Side by side
How can you tell a child needs more support?
What you notice
What usually helps
Poor sleep or bad dreams
Extra time at bedtime and a calm repeat of the plan
Clinging, or not wanting to go to school
Steady routines, and a quiet word with a trusted teacher
Anger or long silences in a teenager
Space, a set time to talk, and the offer of a counsellor
Constant worry about their own body
Short, calm answers, and help from a child psychologist
Reading frightening stories online
Reading reliable pages together and talking them through
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Being straight with you
What this page cannot tell you
It cannot tell you whether or when your child should be tested. That depends on the exact gene and whether any check would help a child. What your specific variant means for your children is a question for the counsellor who ordered the test.
It cannot know your child
The stages above are broad. A child with learning difficulties, a child who has already lost a relative to cancer, or a child caring for an ill parent may need a different approach. A child psychologist or a counsellor used to working with families can help you adapt it.
Who this does not apply to
A few inherited syndromes cause problems in childhood and need checks to start young. If your family has one of these, your child's doctors will lead the conversation and the timing, and the ages here matter less. If your result was negative, or showed only a variant of uncertain significance, there may be nothing to pass on and nothing to explain in these terms.
Commonly believed
Four ideas parents hold, and what is actually true
"Very young children should be told nothing at all."
Even young children notice worry and hospital visits. One simple, calm sentence prevents them filling the silence with something more frightening.
"Teenagers should be protected from the real words."
Teenagers will find the words online. Hearing them from you first, with the right context, is safer and builds trust.
"Once I have told them, the job is done."
It is a conversation that runs through childhood. Each stage brings new questions, and older children often need to hear the same facts again in more grown-up words.
"Sons do not need to know about a breast cancer gene."
Sons can carry and pass on the same faults, and some faults raise risk in men too. Sons and daughters deserve the same information at the same stage.
Questions we are asked
Common questions about talking to children by age
What is the right age to first mention a family gene?
There is no single right age. Many parents start when the child first notices something, such as a hospital visit, with a simple sentence about check-ups. The word "gene" can come in the school years. By the teenage years, most children should have heard the real facts from a parent.
My young child asks if I am going to die. What do I say?
If you are well and only carry the fault, say clearly that you are not ill and the doctors are checking you to keep you well. If you have cancer, be honest in a gentle way, and ask your oncologist or a psychologist to help you find words that fit your situation.
Should I use the name of the gene with my teenager?
Yes, usually. Teenagers cope better with real words than with vague ones, and they will need the gene name one day for their own doctors. Explain what it does in plain language, and warn them that online stories often describe the worst cases.
Do I explain it differently to a son and a daughter?
The core message is the same. The details may differ, because some faults affect men and women in different ways. Tell both at the same stage, so neither feels singled out and neither is left out. A counsellor can explain the differences to older children.
My teenager wants to be tested now. What should I do?
Take the wish seriously and arrange for them to meet a genetic counsellor. For faults that matter only in adult life, most counsellors advise waiting until adulthood, so the choice stays their own. Talking it through often eases the urgency.
When should a young adult hear everything before marriage talks?
Well before any proposal. A young adult who has had time to understand the result, and perhaps to meet a counsellor, can handle marriage conversations far more calmly than one hearing it for the first time under family pressure.
Should grandparents say the same things?
Ideally, yes. Children get confused when a grandparent says something different, or more frightening. Tell grandparents what you have said and which words you are using. A counselling session in Telugu can help older relatives explain it the same way.
Who can help me find the right words?
Your genetic counsellor has helped many parents with this. A child psychologist can help if your child is struggling. Call the CION helpline and ask for counselling support, and bring your spouse so you can agree what to say before you begin.
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
Medical Oncologist
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Sources
- National Cancer Institute — Cancer Genetics Risk Assessment and Counseling (PDQ) – Health Professional Version
- NHS — Predictive genetic tests for cancer risk genes
- MedlinePlus Genetics — What is genetic counseling?
- Cancer Research UK — Inherited cancer genes and increased cancer risk
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
Telling your children about a genetic resultHow to plan and start the first conversationGuilt about passing a gene to your childrenFor the feeling that can make the talk harderShould you disclose before marriage?When your grown child faces marriage talksThe right not to knowWhy most children's testing waits until adulthood
Talk to us
Not sure what to say to your child?
A genetic counsellor can help you plan the words for each of your children, and meet older children with you. Tell us their ages and we will help. One helpline serves every CION centre.