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Complete Thyroid Panel LabCorp
SKU
923-l
This panel evaluates Thyroid health with a focus on tests that can help differentiate between thyroid conditions.
What is this panel?
This comprehensive thyroid includes several tests designed to diagnose thyroid conditions. Tests include:
- Free Thyroxine Index (FTI) – This lab measures the amount of usable (bioavailable) free Thyroxine (T4) in the blood. It does this through calculating the total thyroxine and thyroid binding capacity (T-uptake).
- T3 Uptake – This test shows the available binding sites for T3. This test does not measure T3 levels on its own but can evaluate how well T3 moves through the body.
- Thyroid-stimulating Hormone (TSH) – This test measures TSH, which stimulates the release of T3 and T4 thyroid hormones. Abnormal levels of TSH can point toward a thyroid disease, including hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid). This test can also help monitor the effectiveness of thyroid hormone replacement therapy for patients who have already been diagnosed with a thyroid condition.
- Triiodothyronine (T3) – This test measures the amount of T3 in the system to diagnose a thyroid condition. Certain conditions cause elevated T3 levels while T4 levels remain the same, so measuring both allows for a deeper look into thyroid health.
- Thyroxine (T4) – This test measures the amount of T4 in the system to diagnose potential thyroid disease. T4 levels are often abnormally low in people diagnosed with hypothyroidism and abnormally high in people with hyperthyroidism.
Who is this panel for?
The Complete Thyroid Panel II measures in-depth markers of thyroid health, making it ideal for gathering further information if your first Thyroid Panel results were inconclusive.
This panel is typically recommended for those who have taken the Complete Thyroid Panel and require more in-depth testing to accurately diagnose a thyroid condition. This test can also be a primary diagnostic tool depending on your symptoms and risk factors related to thyroid disease. Lastly, this test can help monitor thyroid disease management if you are on a thyroid hormone replacement protocol.
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