Thyroid Peroxidase Test - Diagnosis

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What is the thyroid peroxidase test?

Thyroid peroxidase test is a test that measures the level of an antibody that is directed against thyroid peroxidase (TPO).

Autoantibodies to thyroid peroxidase (TPOAb) are produced within the body. The presence of TPOAb in the blood reflects a prior attack on the thyroid tissue by the body's immune system.

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See what others are saying

Comment from: Puzgrl, 55-64 Female (Patient) Published: July 12

I was just diagnosed with Hashimoto's thyroiditis. My thyroid peroxidase A was 900 which is high. I was diagnosed with hypothyroidism over 10 years ago, wonder why all of a sudden it is Hashimoto's.

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Comment from: Deedee, 45-54 Female (Patient) Published: November 12

I have been treated for hypothyroidism going on 3 years now. I had my first thyroid peroxidase antibodies (TPOAb) test. The normal range is 0-34. However, mine is nearly 12000. I am wondering if I need to contact a specialist since it is apparent I have Hashimoto's, or do I just stay with family doctor on this matter. My TSH is responding to Synthroid but I feel so sick all over constantly.

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