A Simple Examination for Thyroid Health
The thyroid is a small gland located at the front of the neck that plays an essential role in the proper functioning of the body. By producing thyroid hormones, it helps regulate metabolism, body temperature, heart rate and many other functions.
When a structural abnormality is suspected, one of the most commonly used diagnostic examinations is a thyroid ultrasound, a simple, non-invasive and painless procedure that allows doctors to examine the gland and identify potential abnormalities.
But when should you have this examination? How is it performed, and what information can it provide?
What Is a Thyroid Ultrasound?
A thyroid ultrasound is a diagnostic examination that uses sound waves to produce detailed images of the thyroid gland and the surrounding structures.
It allows doctors to assess the size, shape and characteristics of thyroid tissue, identifying any structural changes.
Unlike certain other imaging examinations, ultrasound does not use ionising radiation and can be repeated when clinically necessary, including to monitor previously diagnosed conditions over time.
It is important to remember that ultrasound examines the structure of the thyroid, but it cannot directly determine whether the gland is producing adequate amounts of hormones. Specific blood tests, such as TSH measurement and, when indicated, thyroid hormone tests, are required to assess thyroid function.
When Is a Thyroid Ultrasound Recommended?
A thyroid ultrasound is not a routine screening examination recommended for everyone without symptoms. It is generally prescribed by a doctor when there are specific clinical indications.
Situations that may require an ultrasound examination include:
- Thyroid nodules or swelling in the neck, noticed by the patient or detected during a medical examination.
- Enlargement of the thyroid gland, also known as a goitre.
- Suspected structural abnormalities of the gland, identified during a clinical assessment.
- Monitoring of previously diagnosed thyroid nodules, according to specialist recommendations.
- Assessment of certain thyroid conditions, when ultrasound can help complete the diagnostic picture.
If TSH levels are abnormal, the doctor may also consider whether an ultrasound is appropriate, particularly when there are signs suggesting a structural abnormality of the gland.
How Is a Thyroid Ultrasound Performed?
The examination is quick, painless and generally takes approximately 10–20 minutes, depending on the individual case.
The patient is asked to lie on an examination couch with their neck slightly extended to make it easier to examine the thyroid area.
The doctor applies a gel to the skin and moves an ultrasound probe across the front of the neck. Sound waves make it possible to view the thyroid gland and surrounding structures in real time.
During the examination, the doctor assesses both thyroid lobes, the isthmus connecting them and, when necessary, the lymph nodes in the neck.
No special preparation is required, and fasting is generally unnecessary. Patients can return to their normal daily activities immediately after the examination.
What Can a Thyroid Ultrasound Detect?
Ultrasound can identify several types of structural changes in the thyroid gland.
Thyroid Nodules
Thyroid nodules are localised growths within the gland and are very common among adults.
Most nodules are benign and do not cause symptoms. Ultrasound allows doctors to assess their size and characteristics, distinguishing solid nodules from cystic or mixed formations.
If suspicious features are detected, the specialist may recommend further investigations, such as fine-needle aspiration biopsy.
Goitre and Thyroid Enlargement
The examination can identify an increase in the size of the thyroid gland, which may be diffuse or associated with the presence of multiple nodules.
Changes in Thyroid Tissue
Ultrasound may reveal tissue characteristics consistent with certain forms of thyroiditis, including Hashimoto’s thyroiditis.
However, diagnosis requires a comprehensive assessment that may include symptoms, a specialist consultation and blood tests.
Thyroid Ultrasound and Blood Tests: What Is the Difference?
Ultrasound and blood tests provide different but complementary information.
A thyroid ultrasound examines the structure of the gland, while TSH measurement helps assess how well it is functioning.
In some cases, additional tests may be required, including FT4, FT3 or thyroid antibody tests, depending on the suspected condition.
There is therefore no single examination suitable for every situation: the doctor determines the most appropriate diagnostic approach.
The Importance of Prevention and Targeted Check-ups
Thyroid disorders can develop gradually and, in some cases, without obvious symptoms in their early stages.
Paying attention to changes in the neck, being aware of your family medical history and consulting a doctor if symptoms persist are important steps in looking after thyroid health.
Prevention does not necessarily mean undergoing frequent examinations, but rather having appropriate check-ups based on individual risk factors and medical recommendations.
Take Care of Your Thyroid with Aventino Medical Group
At Aventino Medical Group, patients can access a personalised thyroid health assessment pathway with the support of qualified healthcare professionals.
If you have noticed changes in your neck, have already been diagnosed with a thyroid condition or would like to understand when a check-up may be appropriate, consult a specialist.
From the Aventino Medical Group team