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Stomach and small bowel surveillance in Lynch syndrome | CION Cancer Clinics
Lynch syndrome raises the risk of stomach and small bowel cancer, although both are less common than bowel and womb cancer. Most people are tested once for the stomach infection H. pylori, and some are offered a gastroscopy every few years. This page explains which symptoms should not wait, what the checks involve and why guidelines do not all agree. 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
- Does Lynch syndrome mean my stomach and small bowel need checking?
- Which symptoms should not wait for your next scheduled check?
- What a stomach surveillance check involves
- The words you will meet, in plain language
- What this page cannot tell you
- Four things families tell us, and what is actually true
- Common questions about stomach and small bowel checks in Lynch
The short answer
Does Lynch syndrome mean my stomach and small bowel need checking?
Lynch syndrome raises the risk of stomach and small bowel cancer as well as bowel cancer, although these two are less common than bowel and womb cancer. Most people with Lynch are tested once for a stomach infection called H. pylori and treated if it is found. Some are also offered a camera test of the stomach every few years.
Why guidelines do not all agree
Some American guidance suggests a gastroscopy every few years for the higher-risk Lynch genes, starting somewhere in the thirties or forties. British guidance leans towards a single H. pylori test and treatment instead of routine scopes. Both are reasonable readings of limited evidence, and your doctor will explain which approach fits your family.
Why the small bowel is harder to watch
The small bowel is long and folded, and most of it is out of reach of a normal camera test. A gastroscopy sees the first part. A colonoscopy often sees the last part. The long middle section is rarely scanned routinely, because studies have not shown that checking everyone helps. This is why symptoms matter so much here.
Surveillance for the stomach is added to your colonoscopy plan, never used in place of it.Symptoms to report
Which symptoms should not wait for your next scheduled check?
If any of these last more than a few weeks, see your doctor and mention that you have Lynch syndrome.
From the stomach
Many people in India live with acidity and treat it themselves. With Lynch, persistent symptoms deserve a proper look.
- Indigestion or acidity that does not settle
- Pain in the upper tummy, often after food
- Difficulty swallowing
- Feeling full after a few mouthfuls
From the small bowel
These are easy to put down to diet or gas, so they are often missed.
- Cramping pain around the navel
- Bloating and vomiting after meals
- Weight loss you cannot explain
From a blood test
A low haemoglobin or low iron with no clear reason can be the only sign of slow bleeding somewhere in the gut. Tiredness and breathlessness on the stairs are common clues.
Ask for iron and haemoglobin to be checked if you feel unusually tired.Who this does not apply to
Relatives who tested negative for the family fault follow the same advice as anyone else. Occasional acidity after a heavy meal that settles on its own is not a warning sign.
Not sure whether this applies to you?
Ask an oncologistOn the day
What a stomach surveillance check involves
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Before the test
You are asked not to eat for some hours beforehand. Tell the team if you take aspirin, blood thinners or diabetes medicines, as some may need adjusting.
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The gastroscopy itself
A thin, flexible camera passes through your mouth into the stomach and the first part of the small bowel. A throat spray or light sedation keeps you comfortable. It usually takes a few minutes.
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Small samples are taken
The doctor takes tiny pieces of the stomach lining, even if it looks normal. You do not feel this. The samples show early changes that the eye cannot see.
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H. pylori is checked and treated
If the infection is found, a short course of antibiotics clears it in most people. A follow-up test confirms it has gone.
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The next step is agreed
Depending on what is found and your gene, the next scope may be in a few years, sooner if changes are seen, or not needed routinely.
On your report
The words you will meet, in plain language
- Gastroscopy
- A camera test of the food pipe, stomach and first part of the small bowel. Also called an upper GI endoscopy.
- Duodenum
- The first section of the small bowel, just beyond the stomach. It is the part a gastroscopy can reach.
- H. pylori
- A common stomach infection that raises the risk of ulcers and stomach cancer. It is treated with antibiotics.
- Biopsy
- A tiny sample of tissue taken during the test and looked at under a microscope.
- Intestinal metaplasia
- A change where the stomach lining starts to look like bowel lining. It is not cancer, but it may lead to closer checks.
- Capsule endoscopy
- A swallowed camera the size of a large tablet that photographs the small bowel. It is used for symptoms, not for routine screening.
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Three things that cannot wait
Vomiting blood or material that looks like coffee grounds, passing black and sticky stools, or feeling faint with a racing heart can all mean bleeding in the stomach or small bowel. Go to the nearest emergency department the same day. Tell them you have Lynch syndrome and whether you take aspirin or a blood thinner. Do not wait for your next scheduled check.
Being straight with you
What this page cannot tell you
It cannot tell you when your own stomach checks should start or how often they should happen. That depends on your gene, your age and whether anyone in the family had stomach or small bowel cancer. What your specific variant means is a question for the counsellor who ordered the test.
What the evidence does not yet show
Studies of stomach surveillance in Lynch are small, and none were done in India. H. pylori infection is very common here, and we do not yet know how much that changes the risk for Indian families. Your gastroenterologist will weigh this rather than follow a rule written for another country.
If you live far from Hyderabad
Gastroscopy is widely available in district hospitals. Ask your local team to take biopsies and send a copy of the report to your Lynch doctor. Doing the stomach check on the same day as your colonoscopy can save a second journey.
If you are unsure whether you need stomach checks, call the helpline. Someone will tell you honestly what your family history suggests.Commonly believed
Four things families tell us, and what is actually true
"My colonoscopy was clear, so my whole gut is fine."
A colonoscopy looks at the large bowel and sometimes the end of the small bowel. It does not see the stomach or most of the small bowel. Each part of the gut needs its own check, and symptoms from the upper gut still need reporting after a clear colonoscopy.
"Acidity is normal. Everyone takes an antacid."
Occasional acidity is common. Acidity that keeps coming back, needs daily tablets or comes with weight loss deserves a gastroscopy when you carry a Lynch fault.
"H. pylori is harmless, so there is no need to treat it."
It raises the risk of ulcers and stomach cancer. For people with Lynch, finding and clearing it is one of the simplest steps available. It spreads easily within households, so ask whether others at home should be tested too.
"A capsule camera every year would catch everything."
Studies have not shown that routine small bowel scans help everyone with Lynch. They are used when symptoms or blood tests point to a problem. Used without a reason, they can find harmless findings that lead to more tests and more worry.
Questions we are asked
Common questions about stomach and small bowel checks in Lynch
Which Lynch genes carry the highest stomach risk?
Stomach and small bowel risks appear higher with MLH1 and MSH2 than with MSH6 or PMS2. A family history of stomach cancer also counts. Your counsellor will explain what your family's gene means for these organs.
Can I have my gastroscopy and colonoscopy on the same day?
Often, yes. Many centres do both under one sedation, one after the other. It saves a second day of fasting and a second journey, which matters if you travel from a district.
Is gastroscopy uncomfortable?
Most people find it brief and manageable. A throat spray numbs the gag reflex, and sedation is available if you are anxious. You may have a mild sore throat for a day afterwards.
How is H. pylori tested?
It can be found on biopsies taken during gastroscopy, or with a breath or stool test. Antacid tablets can hide it, so you may be asked to stop them for a while before a breath or stool test.
What happens if the biopsies show early changes?
Changes such as intestinal metaplasia are not cancer. They usually mean closer checks. Your gastroenterologist will explain what was found and when the next scope should be.
When would I need a capsule camera or MRI of the small bowel?
Usually when there are symptoms, unexplained low iron or bleeding that a gastroscopy and colonoscopy have not explained. It is a test for a question, not a routine screen.
Should my relatives have stomach checks too?
Only relatives who carry the family fault need the Lynch plan. Relatives who tested negative follow ordinary advice. Anyone with persistent symptoms should see a doctor whatever their result.
Does diet change stomach risk in Lynch?
Not smoking, limiting alcohol and eating less salted, pickled and smoked food are good for stomach health generally. None of them replaces the checks your doctor recommends.
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
- National Cancer Institute — Genetics of Colorectal Cancer (PDQ) - Health Professional Version
- GeneReviews (NCBI) — Lynch Syndrome
- NHS — Gastroscopy
- NHS — Stomach cancer
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
Why colonoscopy is so frequent in LynchThe main check that stomach surveillance sits alongsideUrinary tract surveillance in Lynch syndromeThe other organ outside the bowel that families ask aboutLynch syndrome: the complete pictureEvery organ at risk and how each is watchedUpper GI endoscopy surveillanceHow stomach checks work across all inherited syndromes
Talk to us
Not sure whether you need stomach checks?
Tell us your Lynch gene and who in the family had stomach or bowel cancer. We will explain which checks make sense for you and help arrange them alongside your colonoscopy. One helpline serves every CION centre.