Medical Oncologist
CION Cancer Clinics
PTEN and thyroid, kidney and bowel surveillance | CION Cancer Clinics
A PTEN fault raises the risk of cancer in the thyroid, kidney and bowel, as well as the breast and womb. These three organs are watched with ordinary tests: a neck ultrasound, kidney imaging and a colonoscopy. This page explains when each check usually starts, what it looks for, which symptoms to report between visits, and what the checks cannot do. 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
- How are the thyroid, kidney and bowel checked in a PTEN carrier?
- What does each check actually involve?
- When does each of these checks usually start?
- Which symptoms should you report before the next check?
- What this page cannot tell you
- Four things carriers tell us about these checks, and what is true
- Common questions about thyroid, kidney and bowel checks
The short answer
How are the thyroid, kidney and bowel checked in a PTEN carrier?
The thyroid is checked with a neck ultrasound, usually once a year from childhood. The kidneys are imaged every year or two from around forty. The bowel is checked by colonoscopy from the mid-thirties, repeated every few years, or sooner if polyps are found. Your own schedule is set by the team that holds your report.
Why these three organs
A PTEN fault causes harmless overgrowths in many tissues, and raises the chance of cancer in a few of them. The thyroid, kidney and bowel are three of those places. Breast and womb are the others, and they are planned separately with a breast specialist and a gynaecologist.
Why the start ages differ
Thyroid problems can appear in children and teenagers, so neck checks start early. Bowel polyps build up through early adult life. Kidney cancer tends to appear later still. The schedule follows that pattern, so nobody is scanned years before a check could help them.
Surveillance does not stop a cancer starting. It aims to find one early, when treatment is usually simpler.Organ by organ
What does each check actually involve?
All three are routine tests at any large hospital in Hyderabad. None of them needs a hospital stay.
Thyroid
A neck ultrasound, which uses sound waves and no radiation. It shows nodules, which are very common in PTEN carriers and mostly harmless. If a nodule looks unusual, a thin needle takes a few cells to check.
What it looks for
- Nodules that grow or change shape
- A goitre, meaning an enlarged thyroid
- Early follicular or papillary thyroid cancer
Kidney
An ultrasound, CT or MRI of the kidneys. Ultrasound is often used first because it needs no radiation. The scan looks for a solid lump in the kidney, which can be found long before it causes any symptoms.
Bowel
A colonoscopy, where a thin camera looks along the large bowel under sedation. Polyps are very common in PTEN carriers. Most are harmless overgrowths, and any that are found can be removed during the same test.
Before the test
- A light diet and a bowel-clearing drink the day before
- Someone to take you home afterwards
Bringing it together
Many families book all the checks in the same month each year. Travelling from a district once, rather than three times, saves money and missed work, and makes a missed check much less likely.
Not sure whether this applies to you?
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One thing that cannot wait
If you pass a large amount of blood from the back passage, have black tarry stools, or feel faint and breathless with any bleeding, go to an emergency department the same day. Tell the doctors you carry a PTEN fault and may have bowel polyps. A sudden swelling in the neck that makes breathing or swallowing hard also needs same-day care. Do not wait for your next planned check.
Across a lifetime
When does each of these checks usually start?
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At diagnosis, at any age
A full examination and a first thyroid ultrasound. This gives a starting picture that every later scan is compared against.
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Through childhood and the teens
The yearly thyroid ultrasound continues. Parents learn which neck lumps and changes to mention. Nothing else in this group of checks is usually needed at this age.
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In the mid-thirties
A first colonoscopy. If polyps are found, they are removed and the next test comes sooner. If the bowel is clear, the gap is usually a few years.
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From around forty
Kidney imaging is added, typically every year or two. By now all three checks are running, alongside breast and womb checks for women.
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For life, unless your team changes it
The checks continue for as long as they are useful. Earlier starts are common if a close relative was diagnosed young, so tell your team about every diagnosis in the family.
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Between visits
Which symptoms should you report before the next check?
Planned check
Report sooner if you notice
Thyroid ultrasound
A neck lump that grows, a hoarse voice that lasts, or trouble swallowing
Kidney imaging
Blood in the urine, or pain in the side or back that does not settle
Colonoscopy
Blood in the stool, a lasting change in bowel habit, or tiredness from a low haemoglobin
All three
Weight loss you cannot explain
Being straight with you
What this page cannot tell you
It cannot set your own schedule. The ages and gaps above reflect international guidance, mainly from the NCCN, and published expert reviews. Your team may start earlier, add tests or space them differently, depending on your family history and your earlier results. The team that holds your report sets the plan.
It cannot read your scan or your polyp report
A thyroid nodule, a kidney cyst or a bowel polyp can mean very different things depending on its size, its appearance and its type. What a particular finding means for you is a question for the doctor who arranged the test. What your specific variant means is a question for the counsellor who ordered it.
Who this does not apply to
These checks are for people with a confirmed PTEN fault, and for relatives waiting to be tested for a fault already known in the family. Someone with a single thyroid nodule or one bowel polyp, and no other PTEN features, follows ordinary advice. A relative who tests negative for the family fault can usually stop these extra checks.
Commonly believed
Four things carriers tell us about these checks, and what is true
"I feel well, so I can skip this year's scan."
The checks exist because early thyroid, kidney and bowel cancers usually cause no symptoms at all. Feeling well is exactly the state in which these growths are found early.
"Every thyroid nodule in a PTEN carrier is cancer."
Most nodules are harmless. The ultrasound watches them, and only those that look unusual or change are sampled with a needle.
"Polyps mean I already have bowel cancer."
Polyps are overgrowths, and in PTEN most are harmless types. Removing them during colonoscopy is one of the ways surveillance lowers the chance of cancer later.
"A kidney scan every year means a lot of radiation."
Kidney ultrasound and MRI use no radiation. CT does, and your team will choose the test with that in mind, especially when checks continue over many years.
Questions we are asked
Common questions about thyroid, kidney and bowel checks
Can my child have a thyroid ultrasound without sedation?
Yes. A neck ultrasound is quick, needs no injection and no sedation. The child lies still with the neck gently stretched while a gel-covered probe moves over the skin. Most children manage it easily, and a parent can usually stay in the room throughout.
Do I need my thyroid removed to prevent cancer?
Usually not. Removing the whole thyroid is sometimes discussed when there are many nodules, one looks suspicious, or a needle test is unclear. It is not routine for every carrier. Your surgeon and endocrinologist will weigh the choice with you, and there is time to think.
How often will I need a colonoscopy?
The first is usually in the mid-thirties, or earlier if you have symptoms or a relative had bowel cancer young. After that it depends on what is found. More polyps usually means a shorter gap. Your gastroenterologist sets the interval after each test.
Which kidney scan is best?
There is no single right answer. Ultrasound is widely available and uses no radiation. MRI gives more detail and also avoids radiation, but costs more. CT is detailed but involves radiation. Your team will suggest one based on your age, your kidneys and the cost.
Are these checks covered by Aarogyasri or insurance?
Scans and colonoscopy done for symptoms or for a cancer are often covered. Planned checks in a well person may not be. Ask the scheme desk or your insurer in writing before booking, and keep a copy of your genetic report in your file.
Can all three checks be done on one visit?
Often yes, or within a few days. Tell the booking team you are travelling from a district and ask to group the thyroid scan, kidney scan and colonoscopy. The colonoscopy needs preparation the day before, so plan that into the trip.
What happens if a scan finds something?
You are usually offered a further test, such as a needle sample or a different scan. Many findings turn out to be harmless. If a cancer is found early, treatment is often simpler, and your team will explain the options with you in person.
Do men need the same checks?
Yes, for these three organs. Thyroid, kidney and bowel risks apply to both men and women who carry a PTEN fault. Women also have breast and womb checks, which are planned separately with their own specialists.
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
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Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. One helpline books a consultation at any of these centres, and your team will tell you where counselling and testing take place.
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Sources
- GeneReviews (NCBI) — PTEN Hamartoma Tumor Syndrome
- NCCN — Genetic/Familial High-Risk Assessment: Breast, Ovarian, Pancreatic, and Prostate
- MedlinePlus Genetics — Cowden syndrome
- MedlinePlus Genetics — PTEN gene
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 PTEN carriersThe full schedule, including breast, womb and skinPTEN positive: what happens nextThe first steps after a positive resultPTEN mutation: which cancers and what riskWhy these organs are on the list at allPTEN testing cost in HyderabadPlanning for the test and the checks that follow
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Need help organising your yearly checks?
Tell us which checks you are due and where you are travelling from. We will help you group them into as few visits as possible. One helpline serves every CION centre.