thyroid peroxidase antibodies what is considered high
Testing for thyroid antibodies, such as thyroid peroxidase antibody (TPO), is primarily ordered to help diagnose an autoimmune thyroid disease and to distinguish it from other forms of thyroid dysfunction.esting may be performed as a follow-up when other thyroid test results such as total or free T3, free T4, and/or TSH indicate thyroid dysfunction. One or more thyroid antibody tests may also be ordered to determine if a person with an autoimmune condition is at risk of developing thyroid dysfunction.