Thyroid and neck ultrasound assesses the structure of the thyroid gland, nodules, lymph nodes and other superficial neck abnormalities.
Why may it be requested?
Ultrasound may be requested for a neck lump, an enlarged thyroid, a nodule found on examination or another scan, abnormal lymph nodes, pain or follow-up of a known finding. It can measure nodules and describe features that help guide management.
What happens during the scan?
No special preparation is usually required. You will lie on your back with the neck gently extended. Gel is placed on the skin and the probe is moved across the thyroid and adjacent neck. You may be asked to turn your head or swallow.
What can ultrasound show?
- Thyroid size, texture and inflammation-related changes.
- Number, size and appearance of thyroid nodules.
- Cysts and other superficial neck lumps.
- Lymph-node size, shape and internal features.
- Blood flow using Doppler.
- A safe pathway for fine-needle aspiration or core biopsy when required.
What can ultrasound not determine?
Ultrasound cannot determine whether the thyroid is underactive, overactive or functioning normally; blood tests are used for thyroid function. It also cannot always distinguish a benign nodule from thyroid cancer with certainty. The radiologist may recommend surveillance, specialist review or biopsy based on the imaging features and clinical context.
Why might follow-up be recommended?
Many thyroid nodules are benign and do not need biopsy. Follow-up may be used to assess stability. Growth alone is not the only feature considered, and the recommended interval depends on the nodule appearance, size and patient risk factors.
Related Patient Guides
- PG3001 Ultrasound Scan: What to Expect Before, During and After Your Appointment
- PG3002 Preparing for an Ultrasound: Fasting, a Full Bladder and Other Instructions
- PG3003 Musculoskeletal Ultrasound: Dynamic Tendon, Ligament, Nerve and Joint Assessment
- PG3004 Vascular and Doppler Ultrasound: Arteries, Veins and Blood Flow
- PG3005 Pelvic and Transvaginal Ultrasound: What to Expect
- PG3006 Breast and Axillary Ultrasound: Lumps, Symptoms and Follow-Up
- PG3007 Thyroid and Neck Ultrasound: Nodules, Lymph Nodes and Biopsy
- PG3008 Paediatric Ultrasound: A Guide for Parents and Carers
- PG3009 Contrast-Enhanced Ultrasound and Elastography: Advanced Ultrasound Explained
- PG3010 What Ultrasound Can and Cannot Show: When MRI, CT or Other Tests May Be Needed
We have more detailed information on many interesting regenerative and radiological topics on our Insights page
Frequently Asked Questions
For other FAQs please visit our FAQs page
Does a thyroid nodule mean cancer?
No. Thyroid nodules are common and most are benign. Ultrasound helps identify which nodules need no action, surveillance or biopsy.
Will I need to fast?
No special preparation is usually required for a standard thyroid ultrasound.
Can ultrasound check my thyroid hormone levels?
No. Thyroid function is assessed with blood tests, not ultrasound.
| Important: A rapidly enlarging neck mass, breathing difficulty, marked swallowing difficulty or new voice change requires prompt clinical assessment. |
PATIENT GUIDE • PG-3007 [Patient information: Thyroid and neck ultrasound assesses the structure of the thyroid gland, nodules, lymph nodes and other superficial neck abnormalities.]
