Medical Oncologist
CION Cancer Clinics
DICER1 and thyroid nodules in children and young adults | CION Cancer Clinics
Thyroid lumps are the most common finding in young people who carry a DICER1 fault, and most of them are benign. Thyroid cancer is more likely than in other young people, but it is still uncommon and usually slow-growing. This page explains what a thyroid scan can show, when a needle test is needed, and how doctors decide between watching a lump and removing it. 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
- Are thyroid lumps common in young people with DICER1?
- What can a thyroid scan show?
- What happens after a lump is found?
- The thyroid words you will meet, in plain language
- When is a lump watched, and when is surgery discussed?
- What families believe about thyroid lumps, and what is true
- What this page cannot tell you
- Common questions about DICER1 and the thyroid
The short answer
Are thyroid lumps common in young people with DICER1?
Yes. Thyroid lumps, called nodules, are the most common finding in people who carry a DICER1 fault, and they often appear in the teenage years or even earlier. Most of them are benign. Thyroid cancer is more likely than in other young people, but it is still uncommon, and the kind usually found grows slowly and responds well to treatment.
Why a lump in a young person gets a second look
In adults, thyroid lumps are very common and rarely point to anything inherited. In children and teenagers they are much less common. A young person with several lumps in the thyroid, a thyroid cancer, or a family history of goitre alongside a childhood tumour may be offered DICER1 testing for that reason.
Who is watched more closely
Young people who were treated with chemotherapy or radiation for another DICER1 tumour in early childhood have a higher chance of thyroid cancer later. Their thyroid checks are usually planned with that in mind. The same applies if a parent or sibling has already had thyroid cancer.
What a family can do between scans
Most of the work is done by the scan. At home, it helps to know what the neck normally looks like, and to notice a new swelling, a voice that stays hoarse, or trouble swallowing. Keep every thyroid report in one folder, with dates, and carry it to each visit. When families travel from a district for checks, bringing earlier scans saves repeat tests.
A thyroid lump in a DICER1 carrier is expected, not an emergency. What matters is how it looks on the scan.On the ultrasound
What can a thyroid scan show?
Thyroid ultrasound is painless, uses no radiation, and takes a few minutes. The report will usually describe one of these.
A normal thyroid
No lumps are seen. Checks continue on the planned schedule, because lumps can appear later in life. A clear scan is good news, not an all clear for life. Keep each report, so the next radiologist can compare like with like.
One or more small, simple lumps
Many are filled with fluid or look smooth and regular. These are almost always benign and are simply measured again at the next scan. A lump that stays the same size over several scans is reassuring.
Usually needs only
- A repeat scan at the planned time
- A note of its size, to compare next time
Multinodular goitre
The gland is enlarged with several lumps. This is the classic DICER1 finding. It can press on the windpipe or show as a swelling in the neck as it grows.
May need surgery if
- It causes trouble swallowing or breathing
- It is growing steadily
- One lump looks unusual
A lump with worrying features
An irregular edge, tiny specks of calcium, or a lump that is taller than it is wide can prompt a needle sample. Most samples still come back benign.
The radiologist grades each lump. Ask what grade was given and what it means.Not sure whether this applies to you?
Ask an oncologistStep by step
What happens after a lump is found?
A thyroid blood test
This checks whether the gland is making the right amount of hormone. In most DICER1 carriers with lumps it is normal.
A closer ultrasound
A radiologist experienced in thyroid scans measures each lump and looks at its shape, edges and blood supply. The neck glands are checked at the same time.
A needle sample, if needed
A thin needle takes a few cells from a lump under ultrasound guidance. It is done awake, often with a numbing cream, and the young person goes home the same day.
A plan: watch or operate
Most lumps are watched with repeat scans. Surgery is discussed when a lump is suspicious, the goitre is causing symptoms, or the needle sample is unclear.
On the report
The thyroid words you will meet, in plain language
- Nodule
- A lump inside the thyroid gland. It can be solid, filled with fluid, or a mix of both.
- Multinodular goitre
- An enlarged thyroid with several lumps. The most typical DICER1 thyroid finding.
- Fine needle aspiration
- A needle sample of cells from a lump, taken under ultrasound, to check whether it is benign.
- Differentiated thyroid cancer
- The common, slow-growing kind of thyroid cancer. It usually responds well to surgery.
- Thyroidectomy
- An operation to remove the whole thyroid. Removing one half is called a hemithyroidectomy or lobectomy.
- TSH
- A blood test that shows how well the thyroid is working. It guides the dose of thyroid tablets after surgery.
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Side by side
When is a lump watched, and when is surgery discussed?
Usually watched
Surgery usually discussed
Small, smooth or fluid-filled lumps
A lump with worrying features on the scan
Lumps that stay the same size
A goitre that is growing steadily
A benign needle sample
A needle sample that is suspicious or unclear
No symptoms in the neck
Trouble swallowing, breathing or a hoarse voice
Commonly believed
What families believe about thyroid lumps, and what is true
"A thyroid lump in a young person means cancer."
Most thyroid lumps in DICER1 carriers are benign. They are watched with ultrasound, and a needle sample is taken only if a lump looks unusual.
"It is a salt problem. More iodised salt will make it go away."
Iodised salt matters for everyone, but DICER1 lumps come from the gene, not from diet. Changing salt will not shrink them. Medicines bought without advice can do harm.
"Once the thyroid is removed, the DICER1 risk is over."
Surgery deals with the thyroid only. Other DICER1 checks, such as pelvic ultrasound for young women, still continue as planned.
"After thyroid surgery she cannot marry or have children."
People without a thyroid take a daily hormone tablet and lead normal lives, including marriage and pregnancy. The tablet dose is checked more often during pregnancy.
Being straight with you
What this page cannot tell you
It cannot tell you whether a particular lump is benign, or whether surgery is right for your child. That depends on the scan images, the needle sample and the young person's wider DICER1 history. What your specific variant means is a question for the counsellor who ordered the test.
It cannot settle how much thyroid to remove
When surgery is needed, surgeons often discuss removing the whole gland, because new lumps tend to grow in whatever remains. Others prefer to keep half where they safely can. Studies so far are small. This is a decision to make with an experienced thyroid surgeon, not from a web page.
Who this does not apply to
Most adults with a thyroid lump do not have DICER1 and do not need genetic testing. Many teenagers with a single lump do not either. This page is for young people who carry DICER1, or whose doctor has raised it because of an unusual thyroid pattern.
Questions we are asked
Common questions about DICER1 and the thyroid
When do thyroid scans usually start for DICER1 carriers?
Thyroid ultrasound usually starts in later childhood and continues at intervals through adult life. Children who had chemotherapy or radiation for another DICER1 tumour may be scanned more often. Your child's team will set the timing for their age and history.
Does every lump need a needle test?
No. Small, smooth or fluid-filled lumps are usually just measured again at the next scan. A needle sample is suggested when a lump has worrying features or grows noticeably between scans.
Is the needle test painful for a teenager?
Most teenagers describe it as uncomfortable rather than painful. It takes a few minutes, is done awake, and a numbing cream or injection can be used first. The neck may feel a little sore for a day.
Will my child need thyroid tablets for life after surgery?
If the whole thyroid is removed, yes. A small daily tablet replaces the hormone the gland used to make, and a blood test guides the dose. If only half is removed, the other half often makes enough on its own.
What signs in the neck should we report?
A lump you can see or feel, a lump that grows quickly, a hoarse voice that does not settle, or difficulty swallowing or breathing. Mention DICER1 to the doctor. Do not wait for the next planned scan.
If thyroid cancer is found, how is it treated?
Usually with surgery, sometimes followed by radioactive iodine and a hormone tablet. The slow-growing type seen in young DICER1 carriers generally does well with treatment. Your surgeon and oncologist will explain the plan for your child.
Do brothers and sisters need thyroid scans too?
Only those who test positive for the family's DICER1 fault need planned thyroid checks for that reason. Siblings who test negative follow ordinary care, like any other young person their age.
Who looks after the thyroid in DICER1 at CION?
An endocrinologist, a thyroid surgeon and a radiologist usually work with the oncologist and genetic counsellor. Call the CION helpline with the latest scan report, and you will be booked with the right team.
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) — DICER1-Related Tumor Predisposition
- National Cancer Institute — Childhood Thyroid Cancer Treatment (PDQ) - Patient Version
- MedlinePlus Genetics — DICER1 syndrome
- NHS — Thyroid 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
Surveillance for DICER1 carriersWhere thyroid scans fit in the full scheduleDICER1 mutation: which cancers and what riskThe other growths linked to the geneDICER1 syndrome in children: what to watch forSigns to report between scansDICER1 positive: what happens nextThe first steps after a positive result
Talk to us
Has a scan found a thyroid lump in your child?
Share the scan report and tell us about the DICER1 result. We will help you reach a thyroid and genetics team who can explain the next step. One helpline serves every CION centre.