What is it used for?A thyroglobulin test is mostly used to:See if thyroid cancer treatment was successful. If thyroglobulin levels stay the same or increase after treatment, it may mean there are still thyroid cancer cells in the body. If thyroglobulin levels decrease or disappear after treatment, it may mean there are no normal or cancerous thyroid cells left in the body.See if cancer has returned after successful treatment.A healthy thyroid will make thyroglobulin. So a thyroglobulin test is not used to diagnose thyroid cancer.
