To diagnose primary<unk> , many doctors simply measure the amount of Thyroid-stimulating hormone (TSH) being produced.  High levels of TSH indicate that the thyroid is not producing sufficient levels of Thyroid hormone (mainly as thyroxine (T4) and smaller amounts of triiodothyronine (fT3)).
Hypothyroidism laboratory findings
Hyperthyroidism laboratory findings
Addison's disease laboratory findings
Graves' disease laboratory findings
Autoimmune polyendocrine syndrome laboratory findings
Hypopituitarism laboratory findings
Hyperparathyroidism laboratory findings
Cushing's syndrome laboratory findings