Quick answer. Thyroid nodules (lumps) and goitre (an enlarged thyroid) are very common; ultrasound can find nodules in up to two-thirds of people, and around 90% are benign. Most cause no symptoms and are found incidentally. Red-flag features needing prompt assessment include a hard or rapidly growing lump, a hoarse voice, difficulty swallowing or breathing, a lump fixed to surrounding tissue, enlarged neck lymph nodes, or past neck radiation. Assessment in Singapore typically involves a thyroid ultrasound (graded using TI-RADS), thyroid function blood tests, and a fine needle aspiration (FNA) biopsy if a nodule looks suspicious. Most benign nodules just need monitoring; surgery is used for cancer, compressive symptoms or cosmetic concerns.
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Finding or feeling a lump in your neck can be alarming, but thyroid nodules and goitre are extremely common and the large majority are not cancer. A thyroid nodule is a localised swelling within the thyroid gland; when there are several, it is called a multinodular goitre. Ultrasound can detect nodules in up to two-thirds of the general population, and most are simply overgrowths of normal tissue, fluid-filled cysts or benign growths.
This guide focuses specifically on lumps, nodules and swelling, rather than general thyroid hormone problems. It explains how common nodules are, the warning features that genuinely need attention, how thyroid nodules are assessed in Singapore (ultrasound, thyroid function tests and fine needle aspiration biopsy), and the treatment and monitoring options. The aim is to help you understand when reassurance is appropriate and when to seek prompt medical assessment.
At a glance
| Feature | Usually reassuring | Needs prompt assessment |
|---|---|---|
| Growth | Stable or very slow change over years | Rapidly enlarging lump |
| Texture | Soft, moves on swallowing | Hard, fixed to surrounding tissue |
| Voice | Normal voice | New or persistent hoarseness |
| Swallowing/breathing | No difficulty | Trouble swallowing or breathing |
| Neck glands | No enlarged lymph nodes | Enlarged or firm neck lymph nodes |
| History | No special risk factors | Past neck radiation or family history of thyroid cancer |
How common are thyroid nodules and goitre?
Thyroid nodules are very common. Using ultrasound, nodules can be found in up to about two-thirds of a random population, and they become more common with age. Most are discovered by chance during a scan, a routine check or self-examination rather than because of symptoms.
A goitre is simply an enlarged thyroid; a multinodular goitre contains several nodules. Worldwide the commonest cause of multinodular goitre is iodine deficiency, although it can also occur in people with adequate iodine. The reassuring headline is that around 90% of thyroid nodules are benign (non-cancerous).
When to worry: cancer red-flag features
Although most nodules are harmless, certain features raise concern for thyroid cancer and should prompt medical assessment without delay:
- A hard lump or one that is fixed to surrounding tissue
- A rapidly enlarging swelling
- New or persistent hoarseness of the voice
- Difficulty swallowing or breathing
- Enlarged or firm neck lymph nodes
- A history of radiation to the neck, or a family history of thyroid cancer
In Singapore, thyroid cancer is the eighth most common cancer among women overall, but among women under 50 it is one of the three commonest cancers, so a suspicious lump in a younger woman deserves prompt evaluation. Even so, the presence of a nodule alone is usually not cancer.
How thyroid nodules are assessed
Assessment in Singapore usually combines three things:
- Thyroid function tests (TFT): blood tests for TSH and thyroid hormones to check whether the gland is overactive, underactive or normal
- Ultrasound: the key imaging test, now reported using the TI-RADS (Thyroid Imaging Reporting and Data System) to grade how suspicious a nodule looks and decide whether a biopsy is needed
- Fine needle aspiration (FNA) biopsy: a quick clinic procedure using a thin needle, often under ultrasound guidance, to sample cells; results are reported using the Bethesda system, which estimates the risk of cancer from very low (benign) to very high
This stepwise approach avoids unnecessary surgery while making sure suspicious nodules are properly investigated.
Treatment and monitoring options
Treatment depends on the diagnosis and on whether the nodule causes symptoms:
- Surveillance: most benign, asymptomatic nodules simply need monitoring with periodic ultrasound, with the interval depending on the TI-RADS grade. Significant growth (for example more than about 20%) or new symptoms prompt re-assessment.
- Surgery (hemithyroidectomy or total thyroidectomy): recommended for confirmed or strongly suspected cancer, for nodules causing compressive symptoms, for a large goitre, or sometimes for cosmetic reasons or patient preference.
- Radiofrequency ablation (RFA): a minimally invasive option offered at some centres to shrink benign but symptomatic nodules without surgery.
If a nodule is also overactive, treatment may overlap with management of hyperthyroidism.
Living with a thyroid nodule or goitre
Being told you have a thyroid nodule or goitre is common and usually not a cause for alarm. Key points to remember:
- Most nodules are benign and need only monitoring, not removal
- Keep your follow-up ultrasound appointments so any change is detected early
- Report new symptoms promptly, especially hoarseness, a rapidly growing lump, or trouble swallowing or breathing
- If thyroid function is abnormal, treating the hormone problem is separate from managing the lump itself
Care for thyroid nodules and goitre in Singapore is provided by endocrinologists, often alongside head-and-neck or endocrine surgeons when surgery is being considered. Costs vary by setting and procedure; ask your provider for an estimate.
What to expect at the appointment
If you have noticed a lump or your doctor has found a nodule, the assessment is usually straightforward and not painful. Your doctor will feel your neck while you swallow, ask about your symptoms and any family history of thyroid problems, and arrange a thyroid ultrasound and blood tests. An ultrasound uses a small probe on the skin of your neck and takes only a few minutes. If a fine needle aspiration biopsy is advised, a thin needle is used to take a small sample of cells; most people describe it as similar to a blood test and can return to normal activities the same day.
How to prepare and what to ask
You do not usually need to fast before an ultrasound or thyroid blood tests unless told otherwise. Bring a list of your medicines, including any thyroid hormone or iodine-containing supplements. Helpful questions to ask your doctor include:
- What is the TI-RADS grade of my nodule, and does it need a biopsy?
- Is my thyroid function normal, or do I need treatment for an over- or under-active thyroid?
- How often should I have a follow-up ultrasound?
- What changes or symptoms should prompt me to come back sooner?
Common questions
Does a thyroid nodule mean I have cancer?
Usually not. The large majority of thyroid nodules are benign. Ultrasound and, where needed, a biopsy help your doctor tell the difference safely.
Will I need surgery?
Most benign nodules just need periodic monitoring. Surgery is mainly considered for confirmed or suspected cancer, for nodules causing pressure on the windpipe or gullet, or for a large or visible goitre.
Can a nodule affect my thyroid hormone levels?
Some nodules are “hot” and produce extra thyroid hormone, which is why blood tests are part of the assessment. If hormone levels are abnormal, that is treated separately from the lump itself.
Related guides
- Best Endocrinology & Diabetes Clinics in Singapore — our editorial shortlist
- endocrinology & diabetes clinics directory
- Gestational diabetes
- Hyperthyroidism & Graves' disease
- Diabetic complications
Sources
- SingHealth – Thyroid Nodules: An Update on Investigations and Management
- HealthXchange – Thyroid Nodules and Goitres
- SingHealth – Thyroid Nodules: Symptoms, Diagnosis & Treatment
- SingHealth – Thyroid Nodules and Surgery
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