A 26-year-old woman comes to the physician for a 2-day history of restlessness, palpitations, and neck tenderness. Heart rate is 90. Thyroid-stimulating hormone (TSH) is 0.3 mIU/L. Radioiodine-131 scan shows reduced uptake. Which of the following is the most likely explanation for this patient’s findings?
Antibodies against TSH receptor
Anti-microsomal antibodies
Exogenous administration of levothyroxine
Increased release of pre-formed thyroid hormone
Toxic adenomatous autonomous secretion
