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Lynch syndrome in men: the risks and the checks | CION Cancer Clinics
A man with Lynch syndrome has a raised risk of bowel cancer for life and needs regular colonoscopy, just as a woman does. He also has raised risks in the urinary tract, prostate and stomach, and he passes the fault to his children in exactly the same way. This page explains which cancers matter for men, what checks help and where the evidence is thin. At CION Cancer Clinics, our oncologists plan screening and care for families with an inherited cancer syndrome, explained in plain words.
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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 Lynch syndrome mean for a man?
- Which cancers should a man with Lynch keep in mind?
- What a man's Lynch plan usually looks like
- The words you will meet, in plain language
- What men and women with Lynch share, and what differs
- What this page cannot tell you
- Four things families tell us, and what is actually true
- Common questions about Lynch syndrome in men
The short answer
What does Lynch syndrome mean for a man?
A man with Lynch syndrome has a raised risk of bowel cancer for life, and needs regular colonoscopy just as a woman does. He also has raised risks of cancer in the urinary tract, the prostate, the stomach and the small bowel. And he can pass the fault to his sons and daughters exactly as a woman can.
Why men are often missed
Lynch syndrome is often discovered through womb cancer in a woman, so families come to think of it as a women's condition. Men are less likely to come to counselling, less likely to be tested and more likely to put off colonoscopy when they feel well. In some studies, men with the higher-risk genes had a slightly higher bowel cancer risk than women.
What changes with the gene
The four Lynch genes do not carry equal risks. MLH1 and MSH2 carry the highest bowel risks. MSH2 in particular is linked to cancers of the urinary tract and the prostate, and to certain skin growths. MSH6 and PMS2 generally carry lower risks. Your plan should be built around your family's gene, not a general list.
Feeling well is not a reason to skip a colonoscopy. Most polyps cause no symptoms at all.Organs to think about
Which cancers should a man with Lynch keep in mind?
Bowel risk comes first. The others depend on your gene and your family history.
The bowel
This is the main risk for every Lynch gene. Regular colonoscopy finds and removes polyps before they turn into cancer, and it is the backbone of every man's plan.
The urinary tract and prostate
Cancers of the kidney drainage tubes and bladder are more common in MSH2 carriers. Prostate cancer risk is also raised, again most clearly with MSH2.
Symptoms to report
- Blood in the urine, even once
- Pain in the side or back that does not settle
- A weak stream or passing urine often at night
The stomach, small bowel and skin
Stomach and small bowel risks are raised, mainly with MLH1 and MSH2. Some men develop unusual yellowish skin growths, which can be a clue to Lynch.
Persistent acidity, weight loss or new skin lumps should be checked, not self-treated.Who this does not apply to
Men who tested negative for their family's known fault. They follow the same screening advice as other men their age, and their children cannot inherit the fault from them.
Not sure whether this applies to you?
Ask an oncologistA plan over the years
What a man's Lynch plan usually looks like
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The result is confirmed and explained
A counsellor goes through your gene, what it means for you and what it means for your children. Bring your wife or a sibling if that helps.
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Colonoscopy begins and is repeated
When it starts and how often it is repeated depend on your gene. For the higher-risk genes it begins in early adult life. Your doctor will give you a written schedule.
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A stomach infection check
Most people with Lynch are tested once for H. pylori, a common stomach infection, and treated if it is found. Some are also offered a gastroscopy.
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A prostate conversation in middle age
Some guidelines suggest men with Lynch, especially MSH2 carriers, discuss starting PSA blood tests earlier than other men. The benefits and downsides are talked through before any test.
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Urine checks if advised
Some doctors suggest a yearly urine test for hidden blood, mainly for MSH2 carriers. The evidence that it helps is limited, so it is discussed rather than assumed.
On your notes
The words you will meet, in plain language
- Carrier
- Someone who has the inherited fault. A carrier is not a patient and may never develop cancer.
- MSH2
- One of the four Lynch genes. It carries higher risks for the urinary tract, prostate and skin than the others.
- Upper urinary tract
- The inside of the kidney where urine collects, and the tube that carries urine down to the bladder.
- Urothelial cancer
- Cancer of the lining of the urinary system, anywhere from the kidney to the bladder.
- PSA
- A blood test for a protein made by the prostate. A raised level can mean cancer, but also infection or simple enlargement.
- Sebaceous tumour
- A growth of the oil glands in the skin. It is uncommon, and in some men it is the first clue to Lynch.
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Side by side
What men and women with Lynch share, and what differs
Men with Lynch
Women with Lynch
Regular colonoscopy for life
Regular colonoscopy for life
Prostate risk raised, most clearly with MSH2
Womb and ovarian risk raised
Urinary tract risk raised, mainly with MSH2
Urinary tract risk raised, mainly with MSH2
Each child has a one in two chance of inheriting it
Each child has exactly the same chance
Being straight with you
What this page cannot tell you
It cannot tell you your personal risk for any one organ. That depends on your gene, your age and who else in the family has had cancer. What your specific variant means is a question for the counsellor who ordered the test.
Where the evidence is thin
Prostate and urinary tract screening in Lynch have been studied far less than bowel screening. Nobody yet knows for certain that PSA tests or urine checks save lives in Lynch carriers. Studies so far are small, and none come from India.
What you can change yourself
Smoking is the biggest avoidable cause of bladder and kidney drainage tube cancer, and it adds to bowel risk too. Stopping helps. Keeping a healthy weight and staying active are sensible for general health, but none of these replace your colonoscopy.
If you are a man in a Lynch family and have never been tested, call the helpline. Someone will tell you honestly whether a referral makes sense.Commonly believed
Four things families tell us, and what is actually true
"Lynch is a women's problem because of womb cancer."
Bowel cancer is the main risk for both sexes. Men also carry prostate and urinary tract risks, and they pass the fault on just as women do.
"I have no symptoms, so I can skip this year's colonoscopy."
Polyps rarely cause symptoms. Colonoscopy works because it finds them before anything is felt. Skipping it removes the protection it gives.
"It came from my mother's side, so my son cannot get it from me."
Once you carry it, it does not matter which parent it came from. Each of your children, sons and daughters alike, has a one in two chance of inheriting it.
"Only my daughters need to be told."
Sons need to know too. They need bowel checks from adult life, and they can pass the fault on to their own children.
Questions we are asked
Common questions about Lynch syndrome in men
Do men with Lynch need colonoscopy as often as women?
Yes. Colonoscopy schedules are set by the gene and the family history, not by sex. Men and women with the same gene usually follow the same bowel programme. Your doctor will give you the schedule in writing.
Should I start PSA tests early?
It is worth discussing, especially if you carry MSH2. PSA can pick up cancers early but can also lead to biopsies for harmless changes. Talk it through with your doctor before deciding.
What does blood in the urine mean for me?
Usually an infection or a stone. With Lynch, and especially with MSH2, it should always be checked properly, even if it happens only once and goes away. See your doctor within days and mention Lynch.
Does Lynch affect a man's fertility?
No. Lynch syndrome does not affect the ability to father children. If you want to reduce the chance of passing it on, a counsellor can explain options such as testing embryos during IVF.
Should my sons be tested now?
Usually not while they are children. Lynch screening starts in adult life, so testing normally waits until they can decide for themselves. Tell them about the family result when the time feels right.
Can I get life or health insurance?
India has no dedicated law on genetic discrimination in insurance. Raise the question with your counsellor before testing, not afterwards. Some men choose to arrange cover before they are tested.
I have skin lumps. Could they be linked?
Most skin lumps are unrelated. Yellowish growths on the face or scalp can occasionally be sebaceous tumours linked to Lynch. Ask a dermatologist to look, and mention your Lynch result.
Where do I start if I have never been tested?
If a relative's report shows the family fault, take a copy to a genetic counsellor for a targeted test. If you are not sure where to go, call the CION helpline 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)
Medical Oncologist
Medical Oncologist
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Sources
- GeneReviews (NCBI) — Lynch Syndrome
- National Cancer Institute — Genetics of Colorectal Cancer (PDQ) - Health Professional Version
- National Cancer Institute — Genetics of Prostate Cancer (PDQ) - Health Professional Version
- 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
Urinary tract surveillance in Lynch syndromeWhat urine checks involve and how much they helpSkin findings and Muir-Torre syndromeThe skin growths that can be a clue to LynchWhy colonoscopy is so frequent in LynchThe check every man with Lynch needs, explainedProstate risk in BRCA and Lynch familiesThe prostate question in more depth
Talk to us
A man in a Lynch family who has never been tested?
Bring a copy of your relative's genetic report if you have one. We will arrange a counselling appointment, explain whether a targeted test makes sense and help plan your checks. One helpline serves every CION centre.