1. A 20-year-old woman presents to the emergency room in labor. She has had no prenatal care. The patient is noted to be very restless, with fever, profuse sweating, marked tachycardia, and a marked tremor. Over the next hour, she develops delirium, nausea, vomiting and abdominal pain between contractions. This potentially fatal condition is most likely related to which of the following thyroid diseases?