Hyperthyroidism is defined as a hypermetabolic state that is characterized by elevated peripheral thyroid hormones. Subclinical hyperthyroidism: low TSH levels in the setting of normal free peripheral thyroid hormone levels (T3, T4). Overt hyperthyroidism: low TSH is seen in the setting of elevated T3 and/or T4. As always, a thorough medical history and physical exam […]