Hypothyroidism: Antithyroid Antibodies Test
If you test positive for antithyroid antibodies, you may have Hashimoto's thyroiditis, the most common cause of hypothyroidism. But many people with hypothyroidism never test positive for antithyroid antibodies. Also, people who test positive for antithyroid antibodies may never develop hypothyroidism.
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.
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