The thyroid is an important endocrine organ located in the front of the neck. Although it is not large in size, it plays an important role in the body. When this organ is poisoned, its function will be significantly affected.

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.