Antithyroid microsomal antibody Information | Mount Sinai – New York
A positive test may be due to:
- Granulomatous or subacute thyroiditis (an immune reaction of the thyroid gland that often follows an upper respiratory infection)
- Hashimoto thyroiditis (a reaction of the immune system against the thyroid gland)
High levels of these antibodies have also been linked with an increased risk of:
- Miscarriage
- Preeclampsia (high blood pressure and protein in the urine after the 20th week of pregnancy)
- Premature birth
- In vitro fertilization failure
Important: A positive result does not always mean that you have a thyroid condition or that you need treatment for your thyroid. A positive result may mean that you have a higher chance of developing thyroid disease in the future. This is often associated with a family history of thyroid disease.
Antithyroid microsomal antibodies may be seen in your blood if you have other autoimmune conditions, including:
