Why is this test important? A thyroglobulin antibodies (TgAb) test is used to measure blood levels of antibodies produced by the thyroid gland. In a healthy immune system, the thyroid does not secrete significant levels of antibodies.
But when the immune system malfunctions, the blood level of antibodies may elevate. This test helps determine if an autoimmune thyroid disease is present and distinguishes it from other forms of thyroid malfunction.
What does this test include?
Who should be tested? The Thryoglobulin Antibodies Test (TgAB) is useful in determining the cause of a goiter (enlarged thyroid gland) or as a follow-up when other thyroid tests such as T3, T4 and TSH) indicate thyroid dysfunction.
If you have a known, non-thyroid-related autoimmune condition, such as systemic lupus erythematosus, rheumatoid arthritis, or pernicious anemia, consider taking this test annually to monitor thyroid involvement. This test may also be taken regularly following thyroid cancer treatment. People who have thyroid gland swelling or injury should also consider this test as antibodies often increase following these events.
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