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Antithyroid Antibodies Test - Topic Overview

The immune system may produce antithyroid antibodies that destroy thyroid tissue. An antithyroid antibody test determines whether you have these antibodies.

Increased levels of antithyroid antibodies may mean that you have autoimmune hypothyroidism (Hashimoto's thyroiditis) or autoimmune hyperthyroidism (Graves' disease). But some people who have hypothyroidism or hyperthyroidism never test positive for antithyroid antibodies. Also, people who test positive for antithyroid antibodies may never develop hypothyroidism or hyperthyroidism.

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If you have mild (subclinical) hypothyroidism, the presence of antithyroid antibodies can help predict how likely it is that you will develop hypothyroidism that eventually causes symptoms.

    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: August 07, 2012
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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