Case presentation A 35-year-old female presented with a 10-day history of constant palpitations, weakness, and irritability. She also experienced the symptoms such as heat intolerance, hand tremor, generalized weakness, inability to sleep, and frequent bowel motions. Past medical history Eczema localized to her hands Family history includes ischemic heart disease The mother suffers from vitiligo Sister has type 1 diabetes. Physical examination She has sweaty palms with a marked hand tremor. Her pulse is regular at 104 beats/min, and her BP is 110/70 with no postural drop.

She has a marked lid lag. What can be the most likely diagnosis for this woman? *This case is from the Editorial Team of Docplexus and is meant for educational purposes only. The answer will be posted soon!