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A positive PMS2 result: the steps that usually follow | CION Cancer Clinics
A positive PMS2 result means you carry a fault in one of the Lynch syndrome genes, the one with the lowest cancer risk of the main four. It does not mean you have cancer, and it does not mean you will get it. This page walks through what usually happens next: confirming the result, planning colonoscopy, the choices women face, and telling relatives. 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 does a positive PMS2 result mean?
- What does a positive result change?
- What usually happens next, step by step?
- The words you will meet, in plain language
- What changes, and what stays the same
- Four things people assume after a PMS2 result
- What can this page not tell you?
- Common questions after a positive PMS2 result
The short answer
What does a positive PMS2 result mean?
It means you carry a fault in PMS2, one of the genes behind Lynch syndrome. It raises your chance of bowel cancer and, for women, womb cancer, above that of other people. Of the main Lynch genes, PMS2 carries the lowest risk, and cancers tend to appear later in life. Most of what happens next is about finding problems early.
It is not a diagnosis
The result describes risk, not illness. A carrier is not a patient and needs no treatment for the fault itself. What changes is how closely you are watched, and from what age. Many people who carry a PMS2 fault never develop cancer at all.
Why the plan is gentler than for other Lynch genes
Because the risk is lower and comes later, colonoscopy usually starts later and may be spaced further apart than for MLH1 or MSH2. Decisions about surgery for women are also less pressing. Your team should give you a plan written for PMS2 specifically, not for Lynch syndrome in general.
PMS2 is harder for laboratories to read than most genes. Confirming the result is often the first step.Four areas of life
What does a positive result change?
Four areas are touched. None of them needs deciding in the first week.
Your bowel
Regular colonoscopy becomes part of life, starting at an age your team sets. Polyps are removed during the procedure itself, which is how most bowel cancers are prevented rather than treated.
For women, the womb and ovaries
Womb cancer risk is raised. Removing the womb and ovaries once a family is complete is one option to discuss, not an instruction.
Worth reporting promptly
- Bleeding between periods
- Any bleeding after the menopause
- Periods that suddenly become much heavier
Your relatives
Your parents, brothers, sisters and grown-up children each have a one in two chance of carrying the same fault. A simple test for the family's exact change can answer that for each of them, and those who test negative can put the worry down.
If you already have cancer
A Lynch result can shape treatment for bowel or womb cancer, including whether immunotherapy may suit. Talk it through with your oncologist. Tumour tests used to choose treatment are covered under targeted therapy.
Not sure whether this applies to you?
Ask an oncologistIn order
What usually happens next, step by step?
A results appointment
The counsellor explains the result, draws the family tree and answers your questions. Bring someone with you, and a list of relatives with any cancer diagnosis and roughly when it happened.
Confirming the result
PMS2 has a near-identical copy nearby, called a pseudogene, which can confuse tests. Some results are checked with a second, specialised method before any plan is made.
Planning colonoscopy
You are referred to a gastroenterologist. The first colonoscopy is set at an age suited to PMS2 and your family history, and the gap between checks is agreed and written down.
Telling relatives
You are given a family letter to share. Each relative decides whether to be tested. Nobody should be pressured, and the letter means you do not have to explain the genetics yourself.
Checking back over time
Advice on PMS2 is still being refined. Ask how you will hear of any change, including if your variant is ever reclassified.
On your report
The words you will meet, in plain language
- Lynch syndrome
- An inherited condition that raises the risk of bowel, womb and some other cancers. PMS2 is one of the genes behind it.
- Mismatch repair
- The cell's spell-checker for DNA. PMS2 makes one of the proteins that does this work.
- Pseudogene
- A near-identical copy of a gene that does not work. PMS2 has one, which is why testing it is harder than usual.
- Cascade testing
- Testing relatives for the family's known fault, one branch at a time, starting with the closest.
- Carrier
- Someone with the fault who does not have cancer. A carrier needs watching, not treatment.
- CMMRD
- A rare, serious childhood condition in a child who inherits a faulty repair gene from both parents. It needs very different care.
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Side by side
What changes, and what stays the same
What changes
What does not
Colonoscopy becomes regular and lifelong
Your daily life, your work and your food
Women are asked to report unusual bleeding early
Most women do not need surgery soon after the result
Relatives are offered a test for the family change
Children are not usually tested until they are adults
Partner choice may matter if you marry a relative
The fault does not affect your fertility
Commonly believed
Four things people assume after a PMS2 result
"Lynch syndrome means I will get bowel cancer."
PMS2 is the lowest-risk Lynch gene. Many carriers never develop cancer, and regular colonoscopy removes polyps before they have a chance to turn into one.
"PMS2 is low risk, so I can ignore it."
Lower is not the same as none. Your chance of bowel and womb cancer is still higher than other people's, and colonoscopy is what keeps it low. Skipping checks throws that advantage away.
"Only the women in the family need to know."
Men carry and pass on a PMS2 fault in exactly the same way, and share the raised bowel cancer risk. Brothers and sons need the family letter too.
"If my partner carries it too, nothing changes for our children."
If both parents carry a fault in a repair gene, a child can inherit two faults and develop CMMRD. This matters most where marriage within the family or community is common. Tell your counsellor if your partner is a relative.
Being straight with you
What can this page not tell you?
It cannot tell you what your own result means. What your specific variant means is a question for the counsellor who ordered the test. Some PMS2 results need confirming by a second method, and a few are reclassified as evidence grows.
Where the evidence is thin
Fewer PMS2 families have been studied than families with other Lynch genes. Risk estimates have come down as more families were included, and advice on when to start colonoscopy, and whether surgery helps women, is still being refined. Guidelines from different countries do not always agree, so ask which one your team follows.
Who this does not apply to
A PMS2 change found only in a tumour, not in blood, is not inherited. If your report says variant of uncertain significance, do not follow this plan until a counsellor says so. Relatives who test negative for the family's change do not need the extra checks at all.
If Telugu is easier for you, ask for the results conversation in Telugu. You should leave understanding it fully.Questions we are asked
Common questions after a positive PMS2 result
Do I have cancer if I test positive for PMS2?
No. The result means you carry a fault that raises risk. It says nothing about whether cancer is present now. If you have symptoms, such as bleeding from the bottom or a lasting change in bowel habit, tell your doctor anyway.
When will my first colonoscopy be?
It depends on the guideline your team follows and on your family history. For PMS2, colonoscopy usually starts later than for other Lynch genes, and sooner if a relative was diagnosed young. Ask for the date and the gap between checks in writing.
Should I have my womb and ovaries removed?
Not straight away, and not necessarily at all. It is one option discussed once your family is complete, weighed against your own risk and wishes. Many women choose to watch and report symptoms early instead. Take your time, and a second opinion if you want one.
Can aspirin lower my risk?
A large trial in people with Lynch syndrome found that regular aspirin lowered bowel cancer risk. It does not suit everyone, because it can cause bleeding and stomach problems. Discuss it with your doctor first, and do not start it on your own.
When should my children be tested?
Usually once they are adults, well before their first colonoscopy would be due. PMS2 cancers do not usually appear in childhood, so there is time for them to decide for themselves. The exception is a family where CMMRD is possible.
Do I have to tell my relatives?
It is your choice, but the result matters to them. A family letter from your counsellor explains the fault in writing, so you do not have to. Many people tell one trusted relative first and let the news travel from there.
Will this affect my insurance or a marriage proposal?
India has no dedicated law on genetic discrimination in insurance, so ask your counsellor before sharing results widely. For marriage, a counsellor can help you explain the result accurately, so that decisions rest on facts rather than fear.
Who should I see first?
A genetic counsellor first, then a gastroenterologist for colonoscopy and, for women, a gynaecologist. Call the CION helpline if you are unsure who to approach, and someone will point you to the right clinic.
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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Sources
- GeneReviews (NCBI) — Lynch Syndrome
- MedlinePlus Genetics — PMS2 gene
- National Cancer Institute — Genetics of Colorectal Cancer (PDQ)
- MedlinePlus Genetics — Lynch syndrome
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
Surveillance for PMS2 carriersThe colonoscopy and womb checks, set out in orderTesting the family for PMS2Who to tell first, and how relatives are testedPMS2: the lowest-risk Lynch geneWhy PMS2 is treated more gently than other Lynch genesWhy PMS2 is hard to testThe pseudogene problem, and why results are confirmed
Talk to us
Just been given a PMS2 result?
Tell us what the report says and who in the family has had cancer. We will help you reach a genetic counsellor and plan the first colonoscopy at the right time. One helpline serves every CION centre.