Euthyroid
Appearance
Clinically euthyroid patients do not have elevated thyroid-stimulating hormone (TSH) levels. Pathogenesis is unknown but may include decreased peripheral conversion of T4 to T3, decreased clearance of rT3 generated from T4, and decreased binding of thyroid hormones to thyroxine-binding globulin (TBG).
Examples of a nonfunctioning thyroid gland may be hypothyroidism, hyperthyroidism, or thyroiditis.[1][2]