TSH – For differential diagnosis of primary, secondary, and tertiary hypothyroidism. Also useful in screening for hyperthyroidism. This assay allows adjustment of exogenous thyroxine dosage in hypothyroid patients and in patients on suppressive thyroxine therapy for thyroid neoplasia.
Synonyms: Thyrotropin, Third-generation TSH, Thyroid Stimulating Hormone
SST, minimum volume 1 mL