Thyroglobulin
Thyroglobulin is a protein produced by the thyroid gland that serves as a precursor for thyroid hormones T3 and T4. It is primarily used as a tumor marker after thyroid cancer treatment.
Category: Thyroid Panel
Also known as: thyroglobulin, serum thyroglobulin, tireoglobulin
Reference range: 0.5–55 ng/mL (Source: ABIM)
Standard unit: ng/mL
High values may indicate
High thyroglobulin may indicate thyroid cancer recurrence (post-thyroidectomy), thyroiditis, Graves' disease, or an enlarged thyroid (goiter).
Low values may indicate
Low thyroglobulin is generally normal. After thyroid cancer treatment, very low levels indicate successful removal or ablation of thyroid tissue.
Frequently asked questions
- What is a normal Thyroglobulin level?
- A typical reference range for Thyroglobulin is 0.5–55 ng/mL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Thyroglobulin measured in?
- Thyroglobulin is most commonly reported in ng/mL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Thyroglobulin reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Thyroglobulin over time?
- Yes. Upload results from any lab and BloodId charts your Thyroglobulin over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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