Thyroid Antibodies : labtest

Why Get Tested?
To help diagnose and monitor autoimmune thyroid diseases and to distinguish these from other forms of thyroiditis; to help guide treatment decisions
When to Get Tested?
When you have a goiter and/or when your other thyroid tests, such as T3, T4, and TSH, indicate thyroid dysfunction; along with a thyroglobulin test when your doctor is using it as a monitoring tool; at intervals recommended by your doctor when you have a known autoimmune thyroid disorder
Sample Required?
A blood sample drawn from a vein in your arm

How is it used?
Thyroid antibody testing is primarily ordered to help diagnose an autoimmune thyroid disease and to separate it from other forms of thyroiditis. It may be ordered to help investigate the cause of a goiter and/or performed as a follow-up when other thyroid test results (such as T3, T4, and/or TSH) show signs of thyroid dysfunction.
One or more thyroid antibody tests may also be ordered if a person with a known non-thyroid-related autoimmune condition, such as systemic lupus erythematosus, rheumatoid arthritis, or pernicious anemia, develops symptoms that suggest thyroid involvement. This involvement may occur at any time during the course of the other condition(s).

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