Thyroid function tests including TSH, total T4, FT3, TSI and other components play an important role in the diagnosis and treatment of thyroid diseases.

Thyroglobulin (Tg) is a protein synthesized and used in the thyroid gland. In some disorders, thyroglobulin is synthesized in excess and released outside the thyroid gland. Thyroglobulin testing is now commonly used to monitor the effectiveness and detect recurrence of differentiated thyroid cancer.

TG is synthesized by thyroid follicular cells and released into the serum along with thyroid hormones. TG levels are used as tumor markers to evaluate the effectiveness of thyroid cancer treatment and monitor recurrence of differentiated thyroid cancers.

Tg and antiTg tests are not used to diagnose thyroid cancer, this test is only valuable for monitoring the disease after treatment for well-differentiated thyroid cancer.

Anti-thyroglobulin occurs when the immune system attacks the thyroid gland. The anti-thyroglobulin antibody test is indicated to check the level of antibodies in the blood, to assess the autoimmune status.