Explore 10,000+ laboratory markers, in plain English.

Pituitary hormone measured to assess the thyroid feedback loop.

TRAb (TSH Receptor Binding Antibody) is a biomarker used primarily to diagnose and manage thyroid-related disorders. It is especially useful for identifying Graves' disease, which is an autoimmune condition where the body's immune system attacks the thyroid, causing it to become overactive. TRAb testing can also help diagnose neonatal hypothyroidism, a condition in newborns where the thyroid is underactive, and postpartum thyroid dysfunction, which can occur in some women after childbirth and involves temporary thyroid problems. TRAb works by measuring antibodies in the blood that affect the thyroid-stimulating hormone (TSH) receptor. These antibodies can either stimulate or inhibit the receptor. In Graves' disease, these antibodies typically stimulate the receptor, leading to increased thyroid hormone production and symptoms like rapid heartbeat, weight loss, and anxiety. On the other hand, inhibitory antibodies can block TSH from binding to its receptor, potentially leading to reduced thyroid activity. By measuring TRAb levels, doctors can determine the presence and activity of these antibodies, providing important information about thyroid function. Managing conditions related to abnormal TRAb levels involves addressing the underlying thyroid issues. For Graves' disease, treatment options may include antithyroid medications to reduce hormone production, radioactive iodine to shrink the thyroid, or surgery to remove part or all of the thyroid gland. For neonatal hypothyroidism, hormone replacement therapy is typically required to ensure normal growth and development. In cases of postpartum thyroid dysfunction, monitoring and managing symptoms is key, as the condition often resolves on its own. Regular testing and follow-up care are important to ensure that thyroid function remains balanced and to adjust treatment as necessary.

often present in the serum of patients with Graves’ disease