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Types of Thyroid Cancer
Hürthle cell (oncocytic) carcinoma — explained for the newly diagnosed
Just been told you have Hürthle cell carcinoma — also called oncocytic thyroid cancer? It is a rare, distinct type of thyroid cancer. This page explains, calmly and clearly, what it is, how it's diagnosed, and how it's treated, so you understand each step ahead.
- A rare but well-understood type — distinct from papillary and follicular thyroid cancer
- A clear treatment pathway — surgery, then radioiodine and follow-up where needed
- Tumour board for every patient — a team view, not one doctor's opinion
- No unnecessary tests, ever — transparent costs and a free first consultation
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What is Hürthle cell (oncocytic) carcinoma?
Being newly diagnosed with Hürthle cell carcinoma raises a lot of questions, and the first is usually simply: what is it? It is a rare type of thyroid cancer that grows from the follicular cells of the thyroid gland. Today it is more often called oncocytic carcinoma of the thyroid, but the older name "Hürthle cell" is still widely used.
It gets its name from the cells it is made of. Under the microscope, the tumour is built mostly of large, granular Hürthle (oncocytic) cells — a distinctive appearance that sets it apart from the more common papillary and follicular thyroid cancers. For this reason it is now classed as its own type of thyroid cancer.
Hürthle cell tumours are often first noticed in one of these ways:
- A lump in the neck — a painless swelling in the front of the neck that you or a doctor notice
- A nodule found on a scan — picked up on an ultrasound or CT done for another reason
- An indeterminate FNAC result — a needle sample reported as a "Hürthle cell" or oncocytic pattern
- Pressure symptoms — occasionally a growing lump, hoarseness, or difficulty swallowing
A diagnosis like this is understandably frightening, but Hürthle cell cancer is treatable and well understood. What matters now is a clear, calm plan — and at CION that plan is shaped by a tumour board, not a single opinion.
Did you know?
Hürthle cell carcinoma is uncommon — it makes up only a small minority of all thyroid cancers and is now grouped under oncocytic carcinoma of the thyroid in the World Health Organization classification. Because benign and malignant Hürthle cell nodules look alike on a needle sample, the diagnosis is often confirmed only after the nodule is removed and examined for invasion. (Source: WHO Classification of Endocrine Tumours; American Thyroid Association guidance.)
How It's Different
How oncocytic thyroid cancer compares with other types
Most thyroid cancers are papillary or follicular. Hürthle cell (oncocytic) carcinoma shares some features with follicular cancer but is treated as its own type, because it behaves a little differently. Here is how it compares.
Most common
Papillary
The most common thyroid cancer. It usually grows slowly, often takes up radioactive iodine well, and is generally very treatable.
Follicular-cell type
Follicular
Also arises from follicular cells. Like Hürthle cell cancer, it is diagnosed by looking for invasion through the nodule's capsule or into blood vessels.
This page
Hürthle cell (oncocytic)
A rare type made of distinctive oncocytic cells. It can take up radioactive iodine less readily, so treatment is planned individually rather than by a single rule.
Less common types
Medullary & anaplastic
Rarer thyroid cancers that come from different cells and are managed quite differently — listed here only so you can see where Hürthle cell sits.
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A clear plan is one consultation away
A Hürthle cell diagnosis is treatable. Let a CION specialist review your reports calmly, without unnecessary tests, so you understand exactly where you stand and what comes next.
How We Diagnose
How Hürthle cell carcinoma is diagnosed, step by step
Diagnosis follows a clear, low-risk sequence. Because a needle sample alone often can't separate a benign from a cancerous Hürthle cell nodule, the final answer sometimes comes after surgery. Each step is explained to you first.
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Ultrasound & thyroid blood tests
A painless neck ultrasound examines the nodule's features, while a simple TSH blood test checks how your thyroid gland is working and guides the next step.
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FNAC & an indeterminate result
A fine-needle sample is examined for cell type. A Hürthle cell or oncocytic pattern is often reported as indeterminate, because benign and cancerous nodules can look alike.
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Molecular testing, where it helps
In some indeterminate cases a molecular test on the sample can help clarify the level of risk before any decision about surgery is made.
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Surgical pathology confirms it
A carcinoma is defined by invasion through the nodule's capsule or into blood vessels — visible only when the whole nodule is examined after removal. This gives the definite diagnosis.
Treatment Options
How Hürthle cell (oncocytic) carcinoma is treated
Treatment is planned for you individually, based on the tumour's size, any invasion, and stage. Your CION tumour board decides the plan together — surgery is the foundation, with other steps added only when they help.
Surgery (thyroidectomy)
Removing part or all of the thyroid gland is the main treatment. Lymph nodes are assessed where needed, and the removed tissue confirms the diagnosis.
Radioiodine (RAI), selectively
Hürthle cell cancer can absorb radioactive iodine less readily, so RAI is considered case by case rather than routinely, based on stage and post-surgery results.
Thyroid hormone tablets
After surgery, a daily levothyroxine tablet replaces the gland's function and keeps your hormone levels steady. Doses are adjusted using blood tests.
Long-term follow-up
Regular thyroglobulin blood tests and neck ultrasound watch for any recurrence, with further imaging arranged only when it is genuinely needed.
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Why patients choose CION for Hürthle cell thyroid cancer
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- 35+ centres across Telangana & Andhra Pradesh — expert care close to home, with the same specialists at every centre.
- Free written second opinion — bring an existing ultrasound, FNAC, or pathology report and have it reviewed calmly by our team.
This page is for general information and does not replace a consultation. Hürthle cell (oncocytic) carcinoma should be assessed by a qualified doctor, who can recommend the right tests and treatment for your situation.
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Common questions
Hürthle cell carcinoma: your questions answered
What is Hürthle cell (oncocytic) carcinoma?
Hürthle cell carcinoma — now usually called oncocytic carcinoma of the thyroid — is a rare type of thyroid cancer that arises from follicular cells of the thyroid gland. Under the microscope it is made up mostly of Hürthle (oncocytic) cells, which look distinctly large and granular. It is classed separately from the more common papillary and follicular thyroid cancers. Although uncommon, it is well understood and treatable, and at CION every case is reviewed by a tumour board so the plan reflects a team view rather than one doctor's opinion.
How is Hürthle cell thyroid cancer diagnosed?
Diagnosis usually starts with a thyroid ultrasound to examine the nodule and a fine-needle aspiration (FNAC) to sample cells. A Hürthle cell pattern on FNAC is often reported as an indeterminate result, because cytology alone cannot always separate a benign Hürthle cell adenoma from a carcinoma. For that reason the final diagnosis is frequently confirmed only after surgery, when the whole nodule is examined for capsular or vascular invasion. Molecular testing may also be used to clarify risk. Your CION specialist explains each step before it is done.
Why is Hürthle cell carcinoma harder to diagnose on FNAC?
On a fine-needle sample, benign Hürthle cell nodules and Hürthle cell carcinoma can look very similar, so the result is often reported as indeterminate rather than clearly benign or malignant. What defines a carcinoma is invasion — cancer cells breaking through the nodule's capsule or into blood vessels — and that can only be seen when the whole nodule is examined under the microscope after removal. This is why surgery is often needed to give a definite answer, and why a tumour-board review of your scans and report matters.
How is Hürthle cell (oncocytic) carcinoma treated?
The main treatment is surgery to remove part or all of the thyroid gland (lobectomy or total thyroidectomy), with lymph nodes assessed where needed. Because Hürthle cell carcinoma often takes up radioactive iodine less readily than other differentiated thyroid cancers, radioiodine (RAI) therapy is considered selectively rather than routinely. After surgery, thyroid hormone tablets replace the gland's function. Your exact plan depends on the tumour's size, invasion and stage, and is decided by a multidisciplinary tumour board at CION.
Does Hürthle cell cancer respond to radioactive iodine?
Hürthle cell (oncocytic) carcinoma tends to take up radioactive iodine less reliably than papillary or follicular thyroid cancer, so RAI is not always effective and is used selectively. Whether it is recommended depends on factors such as the tumour's size, any invasion, the stage, and post-surgery thyroglobulin levels. Where the cancer does concentrate iodine, RAI can help treat any remaining or spread disease. Your CION team weighs these factors together rather than applying a single rule to every patient.
What follow-up is needed after treatment?
After treatment you have regular follow-up with blood tests, including thyroglobulin — a marker that helps show whether any thyroid tissue or cancer remains — alongside thyroid function tests to keep your hormone replacement correct. Neck ultrasound is used periodically to watch for recurrence, and further imaging is arranged only if it is needed. Follow-up is usually long-term but becomes less frequent over time if results stay stable. At CION the plan is explained clearly, with transparent costs and no unnecessary tests.
Can I get a second opinion on a Hürthle cell diagnosis at CION?
Yes. You can book a free, 45-minute, doctor-led consultation at CION Cancer Clinics and bring any existing ultrasound, FNAC, or pathology report for a free written second opinion. There is no obligation to start treatment, costs are explained upfront, and we do not order unnecessary tests. CION has 35+ centres across Telangana and Andhra Pradesh, so there is usually one near you. Call 1800 202 8726 or request a callback to take the next step.
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Thyroid Cancer Topics
Browse our complete guide to thyroid cancer — types, symptoms, causes, tests, stages and treatment. Tap any topic to read more.
Treatment & Specialist Care
Types of Thyroid Cancer
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Tests & Diagnosis
Stages, Survival & Prognosis
Treatment & Procedures
Thyroidectomy Surgery
Thyroid Lobectomy
Neck Dissection
Radioactive Iodine (RAI)
Low-Iodine Diet for RAI
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External Beam Radiation
Does It Need Chemotherapy?
Treatment Without Surgery
Active Surveillance
Hormone Replacement & TSH
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