Neck | ultrasound / ct / mri
Thyroid Nodule
A thyroid nodule means there is a focal area in the thyroid gland that looks different from surrounding tissue. Many are benign, but ultrasound features and size often guide whether doctors monitor it or sample it.
A thyroid nodule is a focal lump or small area in the thyroid gland seen on imaging.
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What it means
A thyroid nodule means there is a focal area in the thyroid gland that looks different from surrounding tissue. Many are benign, but ultrasound features and size often guide whether doctors monitor it or sample it.
Also seen as: thyroid mass, thyroid lesion.
How common it is
Thyroid nodules are common and are often found on ultrasound or incidentally on CT or MRI.
Common incidental neck finding
Thyroid nodules are often found on dedicated ultrasound and also on imaging done for unrelated reasons.
Common causes
- Benign colloid nodule
- Hyperplastic or adenomatous nodule
- Thyroiditis-related change
- Less commonly, thyroid malignancy
When doctors worry
- The report describes suspicious ultrasound features
- There are abnormal lymph nodes
- The nodule meets biopsy thresholds
Typical follow-up
- Use ultrasound pattern and size thresholds
- Repeat ultrasound in selected cases
- Biopsy some nodules based on guideline criteria
Example report wording
Solid thyroid nodule in the right lobe.
See phrase explanationTI-RADS follow-up recommended for thyroid nodule.
See phrase explanation
Common report phrases linked to this finding
solid thyroid nodule
"solid thyroid nodule" is radiology report language linked to thyroid nodule and is best understood in the context of the full imaging report.
Solid thyroid nodule in the right lobe.
"Solid thyroid nodule in the right lobe." is radiology report language linked to thyroid nodule and is best understood in the context of the full imaging report.
TI-RADS follow-up recommended for thyroid nodule.
"TI-RADS follow-up recommended for thyroid nodule." is radiology report language linked to thyroid nodule and is best understood in the context of the full imaging report.
Common size, location, and severity variations
Frequently asked questions
Does a thyroid nodule mean cancer?
No. Most thyroid nodules are not cancer.
Why is ultrasound important?
Dedicated ultrasound gives better risk-pattern detail than incidental CT wording.
Related symptom guides
These educational symptom pages explain search-intent questions that often overlap with this finding.
Clear medical disclaimer
Educational information only. Always consult your clinician for medical advice.
This page is educational only and should be used to understand report language, not to diagnose a condition or replace clinician review.
Sources
Sources and medical review process
RadDx finding pages are written for patient education using consumer-friendly radiology references, plain-language terminology resources, and cautious summary review of common imaging follow-up frameworks.
- Reviewed by
- RadDx Editorial Team
- Last reviewed
- March 10, 2026
- RadiologyInfo.org
RSNA and ACR
- MedlinePlus
U.S. National Library of Medicine
- NCI Dictionary of Cancer Terms
National Cancer Institute
Sources are used for patient education context and terminology support. They do not replace clinician review of your individual report.
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