Thyroid Stimulating Immunoglobulin (TSI)

The Thyroid Stimulating Immunoglobulin (TSI) test measures the levels of antibodies that stimulate the thyroid gland to produce thyroid hormones. TSI is typically elevated in autoimmune conditions, particularly Graves' disease, where these antibodies mimic the action of thyroid-stimulating hormone (TSH), leading to increased production of thyroid hormones.

Test Details:

Sample Type: Serum	Tube Type: SST
Collection Method: In person at a Lab location	Results: 1-6 days from sample arrival at our lab
Age: 18+