Medical Oncologist
CION Cancer Clinics
Small bowel surveillance and balloon enteroscopy in Peutz-Jeghers | CION Cancer Clinics
In Peutz-Jeghers syndrome, most troublesome polyps grow in the small bowel, where ordinary scopes cannot reach. A capsule camera or an MRI finds them, and a long balloon scope removes the large ones before they can block the bowel. This page explains each test, what happens on the day, and the warning signs that need the same-day attention of a doctor. 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
- How is the small bowel checked in Peutz-Jeghers syndrome?
- Which tests look at the small bowel, and how do they differ?
- What actually happens during a balloon enteroscopy?
- Capsule camera or MRI: how do they compare?
- What this page cannot tell you
- Four things families tell us, and what is actually true
- Common questions about small bowel checks
The short answer
How is the small bowel checked in Peutz-Jeghers syndrome?
The small bowel is checked with a swallowed capsule camera or an MRI scan of the bowel, every few years from childhood. When either test shows a large polyp, it is removed with a long scope called a balloon enteroscope, in a planned session rather than an emergency operation.
Why the small bowel needs its own check
The small bowel is the long, coiled middle part of the gut, between the stomach and the large bowel. An ordinary camera test reaches only its first and last few centimetres. In Peutz-Jeghers, this middle stretch is exactly where most of the troublesome polyps grow, so it needs tests that can see all of it.
What the checks are trying to prevent
A large polyp can drag one part of the bowel inside the next. That blocks the bowel and often ends in emergency surgery, sometimes with part of the bowel removed. Polyps can also bleed slowly, which leads to a low haemoglobin and tiredness. Finding and removing big polyps on a planned day avoids most of this. Cancer of the small bowel is less common, but the same checks watch for it.
Seeing the polyps and removing them are two separate steps, often on two separate days.The tests
Which tests look at the small bowel, and how do they differ?
Two tests find the polyps. Two procedures remove them. Knowing which is which makes the plan easier to follow.
Capsule camera
You swallow a camera the size of a large vitamin tablet. It takes thousands of pictures as it travels through the gut, and passes out in the stool. There is no radiation. A child who cannot swallow it can have it placed with a scope.
Worth knowing
- It takes pictures only. It cannot remove anything
- It can rarely get stuck behind a narrowed section
MRI of the bowel
You drink a large amount of special fluid to open up the bowel, then lie in an MRI scanner. There is no radiation. It is good at measuring large polyps and showing where they are, and some centres alternate it with the capsule.
Balloon enteroscopy
The treatment step. A long scope with soft balloons grips the bowel and gathers it up, like a sleeve pushed up an arm, so the scope can reach deep inside. It goes in through the mouth or the bottom, under deep sedation or a general anaesthetic, and removes polyps with a wire loop.
Scope during surgery
When polyps are too many or too large, or earlier operations have left scarring, a surgeon can guide a scope through the bowel during a planned operation. It is kept for when the other methods cannot reach.
Not sure whether this applies to you?
Ask an oncologistOn the day
What actually happens during a balloon enteroscopy?
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Getting ready
You will be asked not to eat beforehand, and to take a bowel preparation drink if the scope is going in from below. Tell the team about any blood thinners well in advance, because some need stopping first.
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The anaesthetic
Adults usually have deep sedation. Children usually have a general anaesthetic. Either way, you will not feel the scope moving and will remember little or nothing of it.
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The scope moves forward in stages
The balloons inflate, grip, and pull the bowel back onto the scope, then release and move on. This is repeated many times. It takes longer than an ordinary scope, often more than an hour.
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Large polyps are removed
Each large polyp is snared with a wire loop, cut free and collected for the laboratory. A small clip may close the base. An ink mark may be left beside a spot the team wants to find again.
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Recovery
Bloating and a sore throat are common and pass quickly. Some people go home the same day. Others stay overnight, especially after several large polyps have been removed.
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One thing that cannot wait
After a polyp removal, and at any other time, severe or worsening tummy pain, a hard swollen belly, fever, repeated vomiting, or black or bloody stools need to be seen the same day. Bleeding or a small tear can show up a few days after the procedure, not just on the day. Go to the nearest emergency department, say you have Peutz-Jeghers syndrome, and show the procedure report.
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Side by side
Capsule camera or MRI: how do they compare?
Capsule camera
MRI of the bowel
Swallow it, then carry on with the day
Drink the fluid, then lie still in the scanner
Better at spotting small polyps
Better at measuring big polyps and where they sit
Rare chance of getting stuck
Nothing is left inside the body
Hard for a young child to swallow
A young child may need sedation to keep still
Read by a gastroenterologist
Read by a radiologist
Being straight with you
What this page cannot tell you
It cannot tell you which test suits you or your child. That depends on age, on how many polyps were found last time, on any earlier bowel surgery, and on what the nearest centre does well. The gastroenterologist who has seen the previous reports is the person to decide.
It cannot interpret a report
A capsule or MRI report lists polyps by position and size. Whether a given polyp needs removing now, or can wait, is a judgement for the team treating you. What your specific gene variant means is a question for the counsellor who ordered the test.
Who this does not apply to
Most people with polyps in the large bowel do not need small bowel checks at all. This routine is for people with Peutz-Jeghers syndrome, or a few other rare polyp syndromes, confirmed by a specialist. The evidence behind the schedules comes from small studies and expert agreement. Balloon enteroscopy is offered at a limited number of centres, so some families from the districts will need to travel for it.
If a check is overdue, or you do not know where to go for balloon enteroscopy, call the helpline and we will help you find out.Commonly believed
Four things families tell us, and what is actually true
"The capsule will remove the polyps as it passes."
It only takes pictures. If it finds a large polyp, a separate procedure is needed to remove it, usually a balloon enteroscopy.
"No tummy pain means there are no big polyps."
Large polyps often grow without any symptoms at all. The first sign can be a blockage. That is the whole reason for planned checks in someone who feels perfectly well.
"Every polyp has to be removed each time."
The aim is to remove the large ones. Small polyps are usually left and watched, because removing each one adds time and risk without much benefit.
"One operation would be simpler than all these scopes."
Polyps keep forming for life, so no single operation finishes the job. Each operation also leaves scarring that makes later scopes harder. Surgery is kept for when a scope cannot do what is needed.
Questions we are asked
Common questions about small bowel checks
At what age do small bowel checks start?
Most guidance starts them around the age of eight, alongside the first camera tests of the stomach and large bowel. A child with tummy pain, bleeding or a low haemoglobin is checked sooner. The team looking after your child will set the exact timing.
How often are the checks repeated?
Usually every two to three years, and sooner if large polyps were found last time. If the first check is clear, some guidelines allow a longer gap before the next. The interval is reviewed after every check, so keep the latest report with you.
Which polyps need to come out?
Guidelines generally advise removing polyps larger than about one and a half to two centimetres, and any polyp that is bleeding or causing symptoms. Smaller ones are usually watched. Your gastroenterologist decides for each polyp, based on its size, shape and position.
Is a balloon enteroscopy painful?
You should not feel it happening, because it is done under deep sedation or a general anaesthetic. Afterwards, bloating, mild tummy ache and a sore throat are common for a day or so. Pain that gets worse instead of better needs to be seen the same day.
What are the risks of removing polyps this way?
The main ones are bleeding and a small tear in the bowel wall. When the scope goes in through the mouth, inflammation of the pancreas can occasionally follow. Risks are higher when very large polyps are removed. The team will explain your own risks before you agree.
What happens if the capsule gets stuck?
It is uncommon, and it often passes on its own in time. If it does not, it can usually be collected with a scope, which can sometimes be combined with removing the polyp that held it up. If a narrowing is suspected, a dissolving dummy capsule may be tried first.
Can an MRI be used instead of the capsule?
Yes. Both are accepted ways to look at the small bowel, and neither uses radiation. The choice depends on the child's age, whether they can swallow the capsule, and what the local centre does best. Some teams alternate between the two over the years.
Where can balloon enteroscopy be done in Telangana?
It is available at a small number of specialist gastroenterology centres, mostly in Hyderabad. Not every hospital that does ordinary scopes offers it. Call the CION helpline and we will point you to a centre that does, and help coordinate it with the rest of the plan.
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) — Peutz-Jeghers Syndrome
- National Cancer Institute — Genetics of Colorectal Cancer (PDQ) - Health Professional Version
- NCCN — Genetic/Familial High-Risk Assessment: Colorectal, Endometrial, and Gastric
- MedlinePlus Genetics — Peutz-Jeghers 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
Bowel blockage and intussusception in childrenWhat the checks are designed to preventSTK11 surveillance scheduleEvery check, by age, on one pageLiving with Peutz-Jeghers from childhoodFitting the checks into school and family lifeCancer risks across organs in Peutz-JeghersThe other organs the plan watches over time
Talk to us
Is a small bowel check overdue?
Tell us when the last capsule, MRI or enteroscopy was done and what it found. We will help you find a centre and fit it into the rest of the plan. One helpline serves every CION centre.