Medical Oncologist
CION Cancer Clinics
Telling your family about inherited colon cancer risk | CION Cancer Clinics
If a gene fault linked to colon cancer has been found in you, your parents, brothers, sisters and children should hear about it from you. Each of them can then be tested for that exact fault, and those who carry it can start colonoscopy early. This page explains who to tell first, what to say, and how to handle relatives who would rather not know. At CION Cancer Clinics in Hyderabad, our oncologists explain colon cancer in plain words and plan care around you and your family.
NG
Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed October 2026, next review due October 2027
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The short answer
Do I have to tell my family about a colon cancer gene fault?
Nobody can force you, but your blood relatives gain a great deal from knowing. Once a fault is found in you, each of them can be tested for that exact fault with a simple blood test. Those who carry it can start colonoscopy early, when polyps can be removed before they turn into cancer.
Why the news has to come from you
Your result belongs to you. Your doctor and genetic counsellor keep it confidential and will not phone your brother or your cousin without your permission. In practice, the person who was tested is the one who carries the message. That can feel like a heavy job, especially while you are still having treatment yourself.
What you are really passing on
You are not passing on a diagnosis. You are passing on a choice. A relative who hears the news can decide to be tested, decide to wait, or decide not to know. What they cannot do is choose at all if nobody tells them. Most families find the conversation goes better than they feared, and many relatives are grateful to have been told.
Telling family is part of looking after them. It is not an admission that you did something wrong.Who needs to know
Which relatives should I tell first?
Start with the people closest to you by blood, then work outwards along the side of the family the fault came from.
Parents, brothers, sisters and children
These are your closest blood relatives, and for most colon cancer genes each of them has an even, one-in-two chance of sharing your fault. Adult children and siblings usually come first.
Tell them
- The name of the syndrome
- The exact gene and fault on your report
- That a simple blood test is available
Aunts, uncles, cousins, nephews and nieces
Their chance is lower, but it is real. Once a parent or sibling knows, they can pass the news down their own branch of the family, so you do not have to call everyone yourself.
Your husband or wife
A spouse is not a blood relative and cannot inherit your fault. They still need to know, because your children may have inherited it and decisions about testing them are shared.
The same is true for daughters-in-law and sons-in-law. They are not at risk, but their children may be.Relatives who live far away
Family in a district town or abroad can be tested where they live. They only need your report or a family letter so their own doctor knows exactly which fault to look for.
Not sure whether this applies to you?
Ask an oncologistOne step at a time
How do I actually start the conversation?
Get the facts in writing first
Ask your counsellor for a copy of your result and a family letter. A family letter explains the fault in plain words and tells any doctor which test to order.
Draw up a short list
Write down who needs to know, starting with parents, siblings and adult children. Decide who you will tell yourself and who can hear it from someone else.
Tell people one at a time
A quiet phone call or a visit works better than a message in the family WhatsApp group. People react differently and some need time alone with the news.
Keep the message simple
Say what was found, that it raises risk but does not mean cancer is certain, and that a test can tell them where they stand. Then hand over the letter.
Point them to a counsellor
Relatives should talk to a genetic counsellor before they are tested. You do not have to answer every question yourself.
What families worry about
Four fears that stop people telling, and what is true
"If people know, nobody will want to marry my daughter."
This is a real fear in many Telugu families, and it is worth saying out loud. Knowing a fault is present lets your daughter be watched closely and stay well. Not knowing does not remove the fault. It only removes the chance to act.
"My brother feels perfectly fine, so he does not need to hear this."
That is exactly why he needs to hear it. Polyps and early colon cancer usually cause no symptoms at all. Testing and colonoscopy are most useful in people who still feel healthy.
"It is my fault my children might have it."
Nobody chooses the genes they pass on, and you inherited this fault yourself from a parent who did not know either. By finding it, you are the first person in the family able to protect the next generation.
"Telling them will only make everyone anxious."
Some worry is normal at first. Most relatives who test and learn they do not carry the fault feel lighter afterwards, and those who do carry it have a clear plan instead of a vague fear.
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Did you know
A relative who tests negative for your family's exact fault usually goes back to ordinary screening for their age. One clear result can take a whole branch of the family off the high-risk list.
Being straight with you
What this page cannot tell you
It cannot tell you which relatives are at risk in your particular family. That depends on the gene involved, which side it came from, and who has already been tested. A counsellor who has drawn your family tree can tell you exactly who to approach. Some genes behave differently; with MUTYH-associated polyposis, for example, brothers and sisters are the ones most likely to be affected.
Who this page does not apply to
If no fault has been found, or no genetic test has been done, there is no specific result to pass on. Your family history still matters, and close relatives may need earlier screening; see screening for siblings and parents. If your report says variant of uncertain significance, do not describe it to relatives as a gene fault. They should not be tested for it.
When a relative does not want to know
That is their right. Give them the letter, tell them it is there if they change their mind, and leave the door open. You have done your part.
Not sure how to start? Call the helpline and ask to speak to the team. We can help you plan what to say.Questions we are asked
Common questions about telling family
Will my doctor contact my relatives for me?
Usually not. Your result is confidential, so the normal route in India is that you share it yourself. Your counsellor can give you a family letter to hand over, and your relatives can bring that letter to their own doctor or to a genetic counsellor.
When should my children be told?
Adult children should be told soon after your result. For Lynch syndrome, testing usually waits until a child is grown up. For familial adenomatous polyposis (FAP), checks start in late childhood. Read should your children be screened and ask your counsellor.
What should I say in the first conversation?
Keep it short. Say a gene fault linked to colon cancer was found in you, that it raises risk but does not make cancer certain, and that a blood test can tell them if they share it. Offer the letter, and let them ask questions in their own time.
Can I share my report in the family WhatsApp group?
You can, but most families find a private conversation works better first. A report in a group chat can frighten people and be misread. Tell your closest relatives directly, then share the family letter with each person once they understand what it means.
Does my husband or wife need a test?
No, not for your fault. A spouse cannot inherit it from you. The exception is MUTYH, where a counsellor may sometimes suggest checking the partner, because a child needs a fault from both parents to be at high risk.
My relative tested negative. Are they free of risk?
They have the same risk as most people of their age, not zero risk. They usually return to ordinary screening and should still see a doctor about any bowel symptoms. A negative result for your family's fault does not rule out cancer from other causes.
What if my family refuses to talk about it?
Some families treat illness as private or unlucky to discuss. You can tell one trusted person, often a sibling or an adult child, and let them help spread the message. Our guide to talking to a relative who will not get checked may help.
Where can my relatives get tested near Hyderabad?
They need a genetic counsellor and a laboratory that can test for your family's exact fault. Call the CION helpline and describe your result. We can arrange counselling and testing through our genetics partners, and help relatives in districts plan a single visit.
Your Specialists
Meet CION's colon cancer specialists. Bring your colonoscopy, scan or biopsy report.
Our surgical and medical oncologists plan colon cancer care together: which operation, whether chemotherapy is needed, and the follow-up that comes after.
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
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
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Sources
- National Cancer Institute — Genetic Testing Fact Sheet
- NICE — Molecular testing strategies for Lynch syndrome in people with colorectal cancer
- Cancer Research UK — Risks and causes of bowel cancer
- American Cancer Society — Colorectal Cancer Risk Factors
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 for siblings and parentsWhat your brothers, sisters and parents should do nextShould your children be screened?When testing and colonoscopy start for the next generationGenetic counselling for colon cancer in HyderabadWhere relatives can be counselled and testedLynch syndrome and colon cancerThe most common inherited cause, explained
Talk to us
Not sure how to tell your family?
Tell us what your genetic report says and who is in your family. We can help you plan the conversation and arrange counselling and testing for relatives who want it. One helpline serves every CION centre.