Normal range: Adult: 0.32-5.0 µIU/mL; Children: 0.32-15 µIU/mL
Comment: Produced by the anterior pituitary gland, thyroid stimulating hormones (TSH) stimulates secretion of T4 (thyroxine) and T3 (Triiodothyro- hormone (TSH) secretion is physiologically regulated by T4, and T3, (feedback inhibition) and is stimulated by TRH (thyrotropin releasing hormone) from the hypothalamus. TSH assay was originally used to diagnosis or confirm primary hypothyroidism. TSH measurement is also used to distinguish primary form secondary hypothyroidism. Thyroid tests are interpreted in clinical context, including history, physical examination, additionally with free T4 and free T3 concentrations and other tests as needed
Sample: serum