Hyperthyroidism affects 2.5% of adults worldwide and, if untreated, is associated with osteoporosis, heart rhythm abnormalities, heart failure, and increased mortality. JAMA Associate Editor Anne Cappola, MD, speaks with Elizabeth N. Pearce, MD, MSc, of Boston University, about the most common causes, symptoms, and first-line treatments for hyperthyroidism. Related Content:

• Hyperthyroidism