Antithyroglobulin antibody is a test to measure antibodies to a protein called thyroglobulin.

This protein is found in thyroid cells.A positive test means antithyroglobulin antibodies are

found in your blood. They may be present with: Graves disease or overactive thyroid.

Hashimoto thyroiditis. Subacute thyroiditis.The reference range value for antithyroglobulin

is less than 116 IU/mL.