**3. Algorhythm for the diagnosis of suspected Hyperthyroidism**

In the first step: Measure serum thyrotropin and free thyroxine

	- A. Normal serum free triiodothyronine; Subclınıcal Hyperthyroidism
	- B. High serum free triiodothyronine- → Triiodothyronine Hyperthyroidism

Diagnosis of Graves' hyperthyroidism was established for patients with biochemical evidence of overt hyperthyroidism, i.e. **high levels** of serum free T4, free T3, TSH < 0.1 mIU/l accompanied by at least two of following parameters: diffuse goiter, Graves' ophthalmopathy, **increased level** of anti-TSH receptor antibodies (TRAb), antithyroid peroxidase antibodies (TPOAb).
