Thyroid Nodules Ultrasound Classification
Learn about thyroid nodule classification through state-of-the-art ultrasound at our specialized thyroid nodule clinic in Singapore. Discover how Dr. Manish Taneja evaluates worrying, indeterminate, and likely benign nodules using key ultrasound features, ensuring accurate diagnosis and tailored care for each patient.
Introduction to Thyroid Nodules Ultrasound and FNAC
Your thyroid gland is a butterfly shaped gland in the neck just below the voice box. Thyroid nodules are small lumps that develop on your thyroid gland. The vast majority are benign and don’t require any treatment. It is a very common condition seen in approximately 30% of adults and more commonly seen in females.
Ultrasound can, however, determine which nodules are more likely to be cancerous. If the nodule looks suspicious on ultrasound, you will be referred for a fine needle aspiration biopsy (FNAC or FNA). This is a procedure in which a small needle is inserted into the thyroid gland to withdraw cells from the nodule. These cells are then examined under a microscope to look for cancerous changes.
FNAC is an outpatient procedure typically done in a doctor’s office and most people don’t even need a local anesthetic or a band-aid. However, ultrasound ensures procedures are not done unnecessarily and also provides the image the doctor needs to insert the needle accurately. Biopsies are typically reported as benign (80%), cancerous (5%) or indeterminate. If cancer is found, surgical removal of the thyroid is recommended, but thyroid cancer is seldom fatal. For some indeterminate results, part of the thyroid is removed. Cysts often have to be reevaluated after biopsy, but a good ultrasound tech can identify cysts at that stage.
Thyroid Nodules Ultrasound Classification
Thyroid nodules are a common finding in medical evaluations, and their assessment is crucial to determine whether they pose any risk of malignancy. At our specialized thyroid nodule clinic in Singapore, we utilize ultrasound and Fine Needle Aspiration (FNA) to classify nodules into categories. This process involves identifying worrying nodules with features that suggest a higher likelihood of cancer, indeterminate nodules that may require closer monitoring, and likely benign nodules that typically do not necessitate invasive procedures. Understanding these classifications helps ensure accurate diagnosis and personalized care for each patient.
Worrying Nodules
When evaluating thyroid nodules, certain characteristics observed during a Fine Needle Aspiration (FNA) can indicate a higher likelihood of malignancy. These include the following nodules that are concerning and raise suspicion:
- Solid with microcalcifications or coarse calcifications
- Those with both cystic and solid components with calcifications
- Irregular margins
- Solid hypoechoic nodules
- Taller than wide nodules
- Those exhibiting intranodular vascularity
These features suggest the need for further diagnostic evaluation to determine the appropriate course of action.
Indeterminate Nodules
For nodules that do not present clear benign or malignant features, the diagnosis may remain indeterminate. In such cases, follow-up imaging and possibly a repeat FNA may be recommended, especially for nodules smaller than 2 cm that are solid and iso-hyperechoic with a thin halo or have solid components with cystic changes.
The decision to proceed with an FNA might also depend on additional risk factors, which can increase the risk of malignancy, including:
- Family history of thyroid cancer
- Previous exposure to radiation
- If the patient is of a younger age
Likely Benign Nodules
Certain types of thyroid nodules are generally considered benign, making FNA unnecessary. These include cystic nodules that may present with
- Comet tail echoes
- Cystic nodules with sludge, or cystic sponge-like nodules
These features typically do not suggest malignancy, and in the absence of other risk factors, these nodules can often be managed with routine observation rather than invasive procedures. In the case of benign nodules, the majority continue to grow and multiple nodules are common in both lobes. This can cause pressure symptoms.
FNAC (Fine Needle Aspiration Cytology/Biopsy) for Thyroid Nodules
FNAC can be done in the clinic and is best done under ultrasound guidance. Special needles are available for biopsy. It is a safe and simple procedure and performed with only local anesthetic. Your neck will be cleaned with an antiseptic solution and a local anesthetic applied. Ultrasound gel will be used to obtain images that guide the doctor to the nodule. The doctor will insert a very fine thin needle, even smaller than ones used for blood draws, into the nodule to draw out cells. The sampling takes only a few seconds and two to six samples are normally taken. Pressure will then be applied to prevent bleeding.
Thyroid Nodules Treatments in Singapore
Treatment Options
When it comes to managing thyroid nodules, several treatment options are available depending on the characteristics and risk level of the nodules. For nodules that are deemed benign or of low concern, clinical monitoring combined with serial ultrasound scans is often recommended. This approach allows for careful observation over time to detect any changes in size or appearance that might warrant further intervention.
For nodules that are suspicious or causing symptoms, surgical removal may be necessary. Conventional surgery remains a common approach, but minimally invasive techniques are also available, offering shorter recovery times and fewer complications. In cases where the nodule is functioning, meaning it produces excess thyroid hormones, radioiodine treatment can be an effective option. This therapy involves using radioactive iodine to shrink the nodule by targeting thyroid cells. Additionally, various interventional treatments provide non-surgical options for patients who may not be suitable for surgery or prefer a less invasive approach.
Interventional Treatments
Interventional treatments for thyroid nodules offer innovative and minimally invasive options to manage nodules without the need for traditional surgery.
Alcohol ablation is one such technique, involving the injection of ethanol directly into the nodule to induce shrinkage. This method is particularly useful for cystic nodules or those that are recurrent after previous treatments.
Thermal ablation techniques represent another category of interventional treatments, utilizing heat to destroy thyroid nodule tissue.
- Laser ablation, for example, uses focused laser energy to target the nodule, causing it to shrink over time.
- Microwave ablation and radiofrequency ablation are similar techniques that employ microwave or radiofrequency energy, respectively, to achieve the same goal.
These procedures are typically performed under local anesthesia and offer a quick recovery, making them attractive alternatives for patients seeking effective treatment with minimal downtime. New technologies, such as Radiofrequency ablation (RFA) are changing the treatment landscape. RFA is a minimally invasive procedure that uses ultrasound and heat energy to kill nodule cells, shrinking the nodule. Repeated treatments eventually leave nothing but a normal thyroid and scar tissue.
Compassionate Care and World-Class Treatment at Supreme Vascular and Interventional Clinic
Managing thyroid nodules effectively requires a personalized approach tailored to the specific characteristics of each nodule and the patient’s overall health. Whether through careful monitoring, surgical intervention, radioiodine treatment, or advanced interventional techniques, our specialized thyroid nodules clinic in Singapore is equipped with the expertise and state-of-the-art technology to provide comprehensive care.
If you have concerns about a thyroid nodule or need expert advice on the best treatment options, contact our clinic today. Our compassionate thyroid nodule speicalist, Dr. Manish Taneja, is here to guide you through every step of the process, ensuring that you receive the most accurate diagnosis and the most effective treatment plan for your needs. Don’t wait - reach out to us now to schedule a consultation and take the first step towards better thyroid health.
The Advantages of RFA of Thyroid Nodules
The major advantages of the technique are as below.
- It is done as day surgery procedure under light sedation.
- It takes about 45 minutes to one hour to complete the entire procedure.
- Patients are discharged the same day.
- Normal thyroid tissue adjacent to the nodule is preserved.
- It does not affect thyroid function.
- Multiple nodules can be treated at same time.
- The treated nodules do not regrow again.
- No surgical scar with needle mark on the skin.
- Quick recovery and back to full activity and normal lifestyle.
- The technique is suitable to treat even large thyroid nodules.
Find out how thyroid nodule Radiofrequency Ablation can help you in a minimally invasive way on our blog post, “Thyroid Nodule Radiofrequency Ablation Treatment: Diagnosis, Management, and Recovery.”
Read More About Vascular Treatments on Our Blog
To dive deeper into the types of vascular treatments such as thyroid nodule radiofrequency ablation, head over to our clinic’s blog. Read our recommended vascular treatments related blog posts to stay informed.
Thyroid Nodule Resources
How to Keep Thyroid Healthy for Optimal Well-Being
As part of the endocrine system, the thyroid hormones must be perfectly balanced at all times for the body to function normally.
Caring For Your Thyroid Health
Have you ever experienced difficulty swallowing or breathing? You may have risk factors including a family history of thyroid nodules or iodine deficiency. Thyroid nodules are abnormal lumps (growths) within the thyroid gland, a butterfly-shaped gland located below your voice box. Even if most thyroid nodules are benign, 10-15% of nodules are cancerous. Sometimes overgrowth of normal thyroid tissue can lead to hyperthyroidism. In other cases, multiple nodules can form in the thyroid called multinodular goiter. Fluid filled thyroid cysts can be one type of thyroid nodule within the thyroid. More complex nodules may lead to thyroid cancers. Depending on the root cause and type of nodule you have, patients can monitor with regular ultrasound or even have a thyroid fine needle aspiration biopsy (FNAC) if required. Surgery to remove partial or whole thyroid gland can be done but thanks to minimally invasive treatments such as Radiofrequency Ablation (RFA), this procedure can treat noncancerous and cancerous thyroid lumps.
Other Health Conditions
The Supreme Vascular and Interventional Clinic is your "go-to" facility for various conditions and pain management. To arrange an appointment with Dr. Manish Taneja, our thyroid nodule specialist, contact us. You can also call us at (+65) 6904 8084 for a consultation.