Categories Diagnostic Immunology Thyroid Stimulating Immunoglobulin Test in the Diagnosis of Thyroid Disease By Stephen (Resilientguy)Posted onJuly 22, 2022December 5, 2022Thyroid stimulating immunoglobulin (TSI) is an antibody produced in high titers when the thyroid gland is defective. The test for this diagnosis is the TSI test … Read More >Thyroid Stimulating Immunoglobulin Test in the Diagnosis of Thyroid Disease