Figure 2. Postpartum thyroiditis in a 27-year-old woman who was experiencing palpitations, nervousness, and insomnia 2 months after giving birth. At physical examination, the patient’s thyroid felt enlarged and nodular. Laboratory values were as follows: T4 = 17.3 µg/dL, FT4 = 2.4 ng/dL, and TSH < 0.02 µIU/mL. The 24-hour RAIU was 2%. Anterior image shows an enlarged thyroid with poor radiotracer concentration (thin arrow) (cf Fig 1). Thick arrow indicates the salivary glands.