Tg details
Description
Thyroglobulin (Tg) is a protein produced exclusively by thyroid tissue, and its main clinical use is as a tumor marker in people who've already been treated for thyroid cancer (typically with surgical removal of the thyroid, sometimes combined with radioactive iodine treatment). Since normal thyroid tissue is the only source of thyroglobulin, a detectable or rising level after treatment can signal that some thyroid tissue — potentially cancer recurrence — remains or has returned, making it a key tool for post-treatment monitoring. It isn't useful as a general thyroid cancer screening test, since benign thyroid conditions also raise thyroglobulin.
Optimal & Reference range
Tg
ng/mL- Low
- Below optimal
- Optimal
- Above optimal
- High
- Optimal range
- 5 - 14
- Reference range
- 2.8 - 40.9
- Out of range
- <2.8 or >40.9
Interpretation
- Low: Your result is below the reference range. Discuss it with your healthcare provider, who can interpret it alongside your symptoms and other results.
- Below optimal: Your result is within the reference range, but below the range we consider optimal.
- Optimal: Your result is within the optimal range.
- Above optimal: Your result is within the reference range, but above the range we consider optimal.
- High: Your result is above the reference range. Discuss it with your healthcare provider, who can interpret it alongside your symptoms and other results.
- These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Blood tests with Tg
Explore available tests to better understand your results and gain deeper insights into your health.
Single marker
Quantitative Thyroglobulin without Thyroglobulin Antibodies
$22.49
Thyroglobulin (TG) is a secretory product only of the thyroid gland. The major clinical use of serum TG measurement is to monitor, but not to diagnose, patients with well-differentiated thyroid cancers.
- Tg Thyroglobulin, a protein made by the thyroid gland. Used mainly to monitor for thyroid cancer recurrence after treatment.
Panel
Thyroglobulin, Quantitative
$40.99
This test measures thyroglobulin (Tg) and thyroglobulin antibodies (Anti-Tg). Thyroglobulin is a protein produced by the thyroid gland that is often used as a tumor marker in patients with thyroid cancer. It is primarily monitored after thyroidectomy or radioactive iodine treatment to detect recurrence or residual thyroid tissue. Thyroglobulin antibodies are autoantibodies directed against thyroglobulin. Elevated levels are commonly associated with autoimmune thyroid diseases such as Hashimoto’s thyroiditis and can interfere with thyroglobulin monitoring in thyroid cancer patients.
- Thyroglobulin Antibodies (Anti-Tg) An autoantibody against thyroglobulin. Elevated levels are associated with autoimmune thyroid conditions like Hashimoto's thyroiditis, and checked before using thyroglobulin to monitor thyroid cancer.
- Tg Thyroglobulin, a protein made by the thyroid gland. Used mainly to monitor for thyroid cancer recurrence after treatment.