Thyroid

T3 is one of two major hormones from your thyroid that regulates how your body uses energy. It's also important in controlling your weight, body temperature, muscle strength, and nervous system. This test measures free circulating T3, excluding that bound to carrier proteins. It aids diagnosis of, or following the treatment for, hyperthyroidism.
Free T4 is the active form of the thyroxine hormone that enters your tissues where needed. Your thyroid, which controls how your body uses energy, produces thyroxine. These hormones affect your weight, heart, body temperature, muscle strength, and mood. A T4 test checks how well your thyroid is working.
T3 is one of two major hormones made by your thyroid, a small gland located near the throat. It helps regulate your energy use, weight, body temperature, muscle strength, and nervous system. This test helps diagnose, assess and monitor thyroid disorders, such as an overactive or underactive thyroid gland and aids diagnoses of pituitary gland disorders.
Thyroxine (T4) is a thyroid hormone affecting your weight, heart, body temperature, and muscle strength. A T4 test can check how well your thyroid is working. It also helps diagnose and monitor thyroid disease and conditions like an underactive or overactive thyroid.
Thyroglobulin is a thyroid protein. This test is mostly used to monitor, but not to diagnose, patients with well-differentiated thyroid cancers. The measurement of thyroglobulin after thyroidectomy and ablation of the thyroid gland is useful for determining metastasis. It may also help diagnose hyperthyroidism and hypothyroidism, which are common non-cancer thyroid conditions.
Thyroglobulin is a protein that your thyroid produces. Antithyroglobulin antibodies can indicate thyroid gland damage caused by the immune system. They may be measured in suspected cases of thyroid inflammation. Measuring thyroglobulin antibody levels after thyroid cancer treatment can help your provider monitor recurrence.
Antibodies are immune system proteins that fight foreign substances like viruses and bacteria. Sometimes antibodies attack the body's cells, tissues, and organs by mistake, known as an autoimmune response. When thyroid antibodies attack healthy thyroid cells, it can lead to Hashimoto's or autoimmune thyroiditis. This test measures the level of thyroid antibodies in your blood.
Antibodies are immune system proteins that fight foreign substances like viruses and bacteria. Sometimes antibodies attack the body's cells, tissues, and organs by mistake, known as an autoimmune response. When thyroid antibodies attack healthy thyroid cells, it can lead to Hashimoto's or autoimmune thyroiditis. This test measures the level of thyroid antibodies in your blood.
TSH stands for thyroid stimulating hormone. The thyroid is a small gland in the front of your neck, controlled by the pituitary gland. The pituitary gland makes TSH to control the production of thyroid hormones. When the thyroid hormone levels in your blood are too low, your pituitary gland produces larger amounts of TSH to tell your thyroid to work harder.
The TRAb or TSH receptor antibody measures the ability of antibodies to inhibit TSH binding to their receptor. TSH is a pituitary gland hormone that stimulates the thyroid hormone's release into the blood. Measurement of TRAb is used to diagnose and manage Graves' disease, neonatal hypothyroidism, and postpartum thyroid dysfunction.
TSIs are antibodies that tell the thyroid gland to release excess amounts of thyroid hormone into the blood. High levels of TSI in the blood can indicate Graves’ disease. This autoimmune disease affects the thyroid gland and causes hyperthyroidism (an excess of thyroid hormone leading to several abnormal metabolisms in your body).