Thyroid Ultrasound In Singapore

A thyroid ultrasound is a non-invasive imaging test used to assess the structure of the thyroid gland. It uses high-frequency sound waves to create detailed images, helping to evaluate thyroid nodules, swelling, or other abnormalities. The scan does not involve radiation and is commonly performed to aid diagnosis and guide treatment decisions.

Dr Donovan Tay

Senior Consultant Endocrinologist

Dr Ben Ng

Senior Consultant Endocrinologist

When is a Thyroid Ultrasound Recommended?

A thyroid ultrasound in Singapore may be recommended in various situations to assess the gland’s size, structure, and any irregularities. It is typically recommended for:

Evaluation of Thyroid Nodules

If a lump or swelling is detected in the thyroid, an ultrasound helps determine its size, shape, and characteristics.
Monitoring of Existing Nodules

For individuals with previously identified nodules, periodic ultrasounds assess any changes in size or appearance over time.
Unexplained Symptoms

If someone experiences persistent swelling in the neck, discomfort, difficulty swallowing, or visible enlargement of the thyroid, an ultrasound can help identify underlying causes.
Abnormal Thyroid Function Tests

If blood tests show unexpected thyroid hormone levels, imaging may be required to check for structural changes.
Post-Treatment Follow-Up

After thyroid surgery, radioiodine therapy, or other treatments, ultrasounds help monitor recovery and detect any recurrence of nodules or swelling.

Benefits of a Thyroid Ultrasound

A thyroid ultrasound provides valuable insights into thyroid health and assists in medical decision-making. The advantages include:

Detailed Imaging Without Radiation

The scan uses sound waves instead of X-rays, making it suitable for all individuals, including pregnant women.

Identification of Nodule Features

Ultrasound imaging provides information on the size, shape, texture, and composition of nodules, helping to distinguish between solid and fluid-filled (cystic) nodules.

Real-Time Guidance for Procedures

The scan assists in performing fine needle aspiration (FNA) biopsies by ensuring accurate placement of the needle.

Assessment of Thyroid Blood Flow

Doppler ultrasound can evaluate blood supply to the thyroid, which may be relevant for conditions such as thyroiditis.

Ongoing Monitoring Without Discomfort

The test allows for regular evaluation of nodules or thyroid enlargement without the need for invasive procedures.

Preparing for the Procedure

A thyroid ultrasound does not require fasting or medication adjustments. Individuals can eat and drink normally before the test. It is helpful to bring previous thyroid test results, including past ultrasounds or blood test reports, for comparison if available.

What Happens During the Procedure?

Positioning

The patient lies on their back with the neck slightly extended to allow clear imaging of the thyroid.
Gel Application

A small amount of gel is applied to the skin over the thyroid to improve contact between the probe and the skin.
Scanning Process

The ultrasound probe (transducer) is moved across the neck to capture detailed images of the thyroid gland and surrounding structures.
Duration and Comfort

The scan usually takes 15 to 30 minutes and is painless. Apart from slight pressure from the probe, there is no discomfort.

There are no restrictions after the procedure, and individuals can return to daily activities immediately.

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Results Review and Follow-Up

The images captured during the scan are reviewed by a doctor, and a report is typically available within a few days. If the thyroid appears normal, no further action may be needed. If nodules or other abnormalities are found, the next steps depend on factors such as size, appearance, and medical history. In some cases, the procedure may need to be done in radiology depending on the complexity and location of the underlying nodule.

Some cases may require additional tests, such as fine needle aspiration (FNA) biopsy, or periodic ultrasounds to monitor changes over time. If signs of thyroid inflammation or enlargement are detected, further blood tests may be advised to assess thyroid function. Follow-up recommendations will be based on individual findings.

Frequently Asked Questions

Can a thyroid ultrasound detect thyroid cancer?

A thyroid ultrasound can identify nodules and assess their characteristics, but it cannot confirm whether a nodule is cancerous. If certain features suggest the possibility of malignancy, a biopsy may be recommended for further evaluation.

Is a thyroid ultrasound the same as a neck ultrasound?

A thyroid ultrasound focuses specifically on the thyroid gland, while a full neck ultrasound examines additional structures such as lymph nodes, blood vessels, and salivary glands.

Can lifestyle factors affect the results of a thyroid ultrasound?

Diet, stress, and physical activity do not influence the ultrasound results. However, a history of iodine deficiency, previous thyroid treatments, or medication use may affect the thyroid’s appearance on the scan. In obese patients, increased fat deposition in the neck can make thyroid ultrasound more technically challenging, potentially reducing image clarity and the sensitivity of the findings.

Dr Ben Ng

Senior Consultant Endocrinologist

As a senior consultant endocrinologist with over 20 years of clinical experience, Dr Ben Ng provides comprehensive care for patients managing various endocrine conditions. His expertise includes the diagnosis and treatment of diabetes, thyroid disorders, obesity, and a range of other metabolic and endocrine conditions.

Dr Ben Ng Jen Min graduated from the Queens University of Belfast Northern Ireland, United Kingdom (UK).
He completed his postgraduate training with the certificate of completion of training (CCT) from the Royal College of Physicians (UK) with dual accreditation in diabetes and endocrinology and in general internal medicine.
In 2010, he was awarded an MD with honours by the University of Hull, UK, in recognition for his research in diabetes mellitus

Dr Donovan Tay

Senior Consultant Endocrinologist

As a senior consultant endocrinologist with over 20 years of clinical experience, Dr. Donovan Tay provides comprehensive care for patients managing various endocrine conditions. His expertise includes the diagnosis and treatment of diabetes, thyroid disorders, osteoporosis, and a range of other metabolic and endocrine conditions.

Dr. Donovan Tay graduated from the National University of Singapore (NUS) and obtained his membership in the Royal College of Physicians (UK), Master of Medicine (NUS), and Master of Clinical Investigation (NUS).
After completing training in endocrinology, he was conferred as a Fellow of the Academy of Medicine, Singapore (FAMS).
He further specialised in endocrinology with a fellowship at the prestigious Columbia University Medical Centre in New York City.

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