TG and thyroid gland disorder: Thyroid function tests include the measurable thyroid stimulating hormone (TSH), total thyroxine (total T4), free thyroxine (Free T4), total triiodothyronine (total T3), free triiodothyronine (free T3), reverse T3, thyroglobulin, thyroxine-binding globulin, and various types of antibody tests to define characteristics of thyroid disorders [1,3].