Serum Free T3 to Free T4 Ratio as a Useful Indicator for Differentiating Destruction Induced Thyrotoxicosis from Graves’ Disease

摘要

IntroductionThyrotoxicosis is a common disease encountered in Endocrine Outpatient Department (OPD). Two common causes of thyrotoxicosis are Destruction Induced Thyrotoxicosis (DIT) and Graves’ Disease (GD). Differentiating DIT and GD based on clinical findings, is often not possible due to nonspecific symptoms. Thyroid scan is considered most reliable method for differentiating DIT and GD.