Thyroid Ultrasound
Thyroid ultrasound is a painless, non-invasive imaging test that evaluates the structure of the thyroid gland and surrounding neck tissues.
It is the primary imaging tool for thyroid nodules, goitre, and suspected structural problems.
Last medically reviewed: 1 November 2025
What the scan shows
Ultrasound reveals gland size, texture, and any nodules — their number, size, composition, and suspicious features. It also detects cysts, enlarged lymph nodes, and inflammatory changes.
Results typically take minutes; a gel is applied to the neck and a probe glides over the area.
When ultrasound is recommended
Palpable neck lumps, visible goitre, abnormal thyroid function tests with structural suspicion, monitoring known nodules, or pre-biopsy evaluation. It is not needed for every thyroid patient — clinical judgment guides its use.
After the scan
Images and a report are provided. Findings are interpreted alongside blood tests and examination — a suspicious nodule may need FNAC, while benign-appearing nodules are monitored.
Frequently asked questions
Is the procedure uncomfortable?
No — it is completely painless. You lie still while a gel and probe are used on the neck; it takes about 15–30 minutes.
Do I need any preparation?
No special preparation — you can eat and take medications normally before the scan.
Can ultrasound diagnose cancer?
It identifies suspicious features that warrant biopsy but cannot definitively diagnose cancer — FNAC provides cellular diagnosis.
References & further reading
This page is based on established medical knowledge and guidelines from authoritative sources. Always consult a qualified clinician for personal medical advice.
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