A thyroid panel is used to evaluate thyroid function and/or help diagnose hypothyroidism and hyperthyroidism due to various thyroid disorders. The panel typically includes tests for Thyroid-stimulating hormone (TSH), Free thyroxine (free T4) and Total or free triiodothyronine (total or free T3)
A thyroid panel may be ordered when symptoms suggest hypo- or hyperthyroidism due to a condition affecting the thyroid.
The following table summarizes some examples of typical test results and their potential meaning.
TSH | T4 | T3 | INTERPRETATION |
High |
Normal |
Normal | Mild (subclinical) hypothyroidism |
High | Low |
Low or normal |
Hypothyroidism |
Low | Normal | Normal | Mild (subclinical) hyperthyroidism |
Low | High or normal | High or normal | Hyperthyroidism |
*Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
None needed; however, certain medications can interfere with the tests included in the panel, so tell your health practitioner about any drugs that you are taking.
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