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
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.