Range: Less than 20 IU/mL
Remarks: TPO (Thyroid peroxydase antibody) or Thyroid Microsomal antibody test is used in the differential diagnosis of hypothyroidism and thyroiditis. The test should be used together with anti thyroglobulin test. Antithyroglobulin antibody test is used in the investigation of autoimmune thyroidits(Hashimotos disease). About 50% of patients with chronic thyroiditis are positive for anti thyroglobulin antibodylobulin antibody. Most od patients with hypothyroidism also are positive for these antibodies.