Hyperthyroidism affects approximately 1.5% of the worldwide population. Graves’ disease is the most common cause of hyperthyroidism, and accounts for 60 to 80 percent of all cases. It is an autoimmune disorder caused by the thyroid stimulating antibody (TSI), active against the thyroid-stimulating hormone (TSH) receptor, which stimulates the gland to synthesize and secrete excess thyroid hormone. In order to choose the right diagnostic tools for the assessment of Graves’ disease patient status it is critical to understand the role of all thyroid tests available. This video shows how fast and accurate diagnosis is key to ensuring proper patient management.