Low TSH – Hyperthyroidism
Toxic multinodular goiter
Suggested Additional Lab Testing
Graves disease: T4 is high and in some cases T3 is elevated and T4 is normal.
Toxic multinodular goiter: T4 and T3 are high with suggestive radioactive iodine uptake and thyroid scans.
Toxic adenoma: T4 and T3 are high with suggestive radioactive iodine uptake and thyroid scans.
Subacute thyroiditis: T4 and T3 are high with increased SED rate and decreased radioactive iodine uptake.
Chronic thyroiditis: T4 and T3 are high with normal SED rate and decreased radioactive iodine uptake.
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