Medical Oncologist
CION Cancer Clinics
MEN1 surveillance: the checks a carrier needs, and when | CION Cancer Clinics
An MEN1 carrier needs yearly blood tests and regular scans for life, starting in childhood. The blood tests find glands making too much hormone, and the scans find silent growths in the pancreas, pituitary and chest. This page sets out what each check looks for, when it usually starts, how to manage it from a district, and the warning signs that need same-day care. 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
The short answer
What checks does an MEN1 carrier actually need?
An MEN1 carrier needs blood tests every year and regular scans for life, starting in childhood. The blood tests look for glands making too much hormone. The scans look for silent growths in the pancreas, pituitary and chest. The aim is to find a growth while it is small and simpler to treat.
Why the checks start so young
Most inherited cancer checks wait until adult life. MEN1 is different. Growths that release insulin, and pituitary growths, have been found in young children. So the international MEN1 guideline, which most specialists follow, starts the first blood tests and a pituitary scan in early childhood and adds the rest as a child grows.
Who runs the plan
An endocrinologist, the hormone specialist, usually leads. They order the tests, compare each result with the last and decide when a growth needs more than watching. MRI is preferred over CT wherever it gives the same answer, because it uses no radiation, and that matters over a lifetime of scans.
Making it work from a district
The yearly blood tests can often be drawn at a good laboratory near home. Scans usually mean a trip to the city. Ask for all of a year's scans and the specialist review on the same day, so one journey covers them.
Keep every report and scan disc in one file. The comparison with last year is what makes the check useful.Gland by gland
What is each check looking for, and why?
MEN1 touches several glands. Each one gets its own check, because a clear result in one says nothing about the others.
Parathyroid glands
The four small glands in the neck that control calcium. They become overactive in almost every carrier at some point. A blood test for calcium and parathyroid hormone picks this up, often years before kidney stones or thinning bones.
Pancreas and duodenum
Neuroendocrine tumours here carry the main cancer risk in MEN1. Some release hormones and show up in blood tests. Many release nothing and are seen only on a scan.
Checked with
- Fasting blood sugar and insulin
- Gastrin and other gut hormones
- A yearly MRI, CT or endoscopic ultrasound
Pituitary gland
A small gland at the base of the brain. Growths here most often make prolactin, which can upset periods, fertility and sex drive. Blood tests for prolactin and a growth hormone marker are done yearly, with an MRI every few years.
Chest and adrenal glands
Rarer tumours can form in the thymus behind the breastbone, or in the lungs. Thymus tumours occur mainly in men and can be aggressive. The adrenal glands are seen on the same scan as the pancreas.
Smoking is linked to thymus tumours in MEN1. Stopping is one thing a carrier can control.Not sure whether this applies to you?
Ask an oncologistAcross a lifetime
When does each check usually start?
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From early childhood
Yearly blood tests for fasting sugar and insulin, and for prolactin and a growth hormone marker. A first MRI of the pituitary is done, then repeated every few years.
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Through the school years
Calcium and parathyroid hormone join the yearly blood tests. A yearly scan of the pancreas begins, which also shows the adrenal glands. Young children may need sedation to lie still in the MRI.
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From the teenage years
A scan of the chest is added, every year or two, to look for thymus and lung tumours. MRI is often used here too, to limit radiation.
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From early adult life
A gastrin blood test is added each year. It looks for tumours that drive the stomach to make too much acid, causing stubborn ulcers.
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For the rest of life
The schedule continues. Your endocrinologist may shorten the gap between scans if a growth is being watched, or adjust it to your family's pattern.
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One thing that cannot wait
Sweating, shaking, confusion, odd behaviour or fainting, especially before breakfast, after a missed meal or after exercise, can mean a tumour is releasing too much insulin and blood sugar has dropped. If the person can swallow safely, give something sugary at once. Then go to the nearest emergency department the same day and say they carry MEN1. Vomiting blood or passing black stools also needs same-day care.
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On your reports
What do the tests on an MEN1 schedule mean?
- Calcium and PTH
- Blood calcium and parathyroid hormone. When both run high, the parathyroid glands are overactive.
- Fasting glucose and insulin
- Blood sugar and insulin measured after an overnight fast. Low sugar with high insulin can point to an insulin-making tumour.
- Gastrin
- A gut hormone that drives acid. Acid-lowering tablets raise it too, so tell the laboratory what you take.
- Chromogranin A
- A protein released by many neuroendocrine tumours. It is a supporting clue, never a diagnosis on its own.
- Prolactin and IGF-1
- Two hormones checked for pituitary growths. IGF-1 is the marker for growth hormone.
- Endoscopic ultrasound
- A thin camera passed through the mouth with an ultrasound probe at its tip. It gives close-up pictures of the pancreas.
Commonly believed
What do families believe about MEN1 checks that is not true?
"I feel well, so I can skip this year."
Most MEN1 growths cause no symptoms while they are small. Feeling well is exactly when checks do their job. A missed year is when a silent pancreas growth can quietly get bigger.
"Every growth they find will need an operation."
Many small pancreas growths are watched rather than removed, because surgery carries its own risks. The decision depends on size, growth and hormones, and is usually made by a team.
"My calcium is normal, so MEN1 is quiet everywhere."
Each gland is separate. A normal calcium says nothing about the pancreas, pituitary or chest. That is why the schedule has several tests, not one.
"Yearly scans will expose my child to too much radiation."
MRI and endoscopic ultrasound use no radiation, and are preferred for children wherever they give a clear picture. Ask your team which scans can be done this way.
Being straight with you
What can this page not tell you?
It cannot set your own schedule. The plan above is the usual starting point, and your endocrinologist will change it for your age, your results and the tumours seen in your family. What your specific variant means is a question for the counsellor who ordered the test.
It cannot read your results
A slightly raised hormone or a small spot on a scan can mean very different things in different people. Some tablets, recent meals and even the laboratory used can shift a reading. Bring every report to your specialist rather than searching the numbers online.
Who this does not apply to
Relatives who tested negative for the family's exact fault need no MEN1 checks. Someone with one overactive parathyroid gland and no MEN1 fault follows ordinary care. A fault found only inside a tumour is not inherited, and belongs with our targeted therapy pages.
Questions we are asked
Common questions about MEN1 surveillance
How long do MEN1 checks go on?
For life. The fault is in every cell, and new growths can appear at any age. The tests and the gaps between them may change as you get older, and your endocrinologist will review the plan with you every year rather than stopping it.
Why MRI rather than CT for most scans?
MRI uses no radiation, and a carrier may have dozens of scans over a lifetime. CT is quicker and sometimes shows the chest or a small growth more clearly, so it is still used when it gives a better answer. Your radiologist and endocrinologist will choose.
Can the blood tests be done in my district?
Often, yes, at an accredited laboratory. Fasting tests must be drawn after an overnight fast. Use the same laboratory each time where you can, because machines differ, and send every report to your endocrinologist before the scan visit.
A small growth was found in my pancreas. Does it need surgery?
Not necessarily. Many small growths that release no hormone are watched with repeat scans. Surgery is usually considered when a growth enlarges, releases a hormone or reaches a size the team agrees is worth removing. Ask for your scans to be reviewed at a tumour board.
Does my child need sedation for the MRI?
Young children often do, because the scan needs them to lie still for some time. Older children usually manage without, especially with a parent in the room. The team will talk through what suits your child's age and temperament before the first scan.
Do the checks change in pregnancy?
They are adjusted. Calcium and prolactin need watching, and some scans are delayed or swapped for safer ones. Tell your endocrinologist and obstetrician about MEN1 early, ideally before you try to conceive, so the plan is agreed in advance.
Will insurance or a government scheme pay for the checks?
It varies. Some insurers and schemes cover scans and tests once a condition is diagnosed, and others do not cover checks in someone who is well. Ask before booking. The helpline can check what your own cover is likely to pay.
What happens if I miss a year?
Restart as soon as you can. Do not wait for the next planned date. Your endocrinologist may bring the next scan forward to make up the gap. Missing one year is common and fixable. Drifting out of checks altogether is what to avoid.
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) — Multiple Endocrine Neoplasia Type 1
- National Cancer Institute — Genetics of Endocrine and Neuroendocrine Neoplasias (PDQ)
- MedlinePlus Genetics — Multiple endocrine neoplasia
- MedlinePlus Genetics — MEN1 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
Tested positive for MEN1: what happens nextThe first year, including the baseline testsMEN1 and the parathyroid, pancreas and pituitaryWhat goes wrong in each gland the checks coverMEN1 mutation: which cancers and what riskWhich growths the schedule is built to findMEN1 testing cost in HyderabadWhat the gene test and relatives' tests usually cost
Talk to us
Need help setting up MEN1 checks?
Tell us what tests you or your child have had so far. We can arrange an endocrinology review and combine a year's scans into one visit where possible. One helpline serves every CION centre.