Snapshot A 32-year-old G0P1001 woman and her 4-week old newborn come to the clinic for a routine newborn checkup. The mother complains of irritation and palpitations but denies other concerns. A physical examination of the newborn is unremarkable and he is tracking well within his growth curves. A thyroid function test of the mother shows low levels of TSH. Introduction Introduction login to view 6 more bullets ETIOLOGY Pathogenesis login to view 1 more bullet Silent Thyroiditis Characterized by transient hyperthyroidism (followed sometimes by hypothyroidism) and then recovery; considered a variant form of chronic autoimmune thyroiditis (Hashimoto’s thyroiditis) login to view 4 more bullets Presentation login to view 6 more bullets Studies login to view 3 more bullets Treatment login to view 5 more bullets Postpartum Thyroiditis Autoimmune destructive thyroiditis within one year after delivery characterized by either 1) transient hyperthyroidism 2) transient hypothyroidism or 3) transient hypothyroidism followed by hypothyroidism and then recovery login to view 5 more bullets Presentation login to view 6 more bullets Studies login to view 3 more bullets Treatment login to view 5 more bullets Riedel Thyroiditis An invasive fibrotic process associated with a mononuclear cell inflammation that extends into the perithyroidal soft tissue login to view 2 more bullets Presentation login to view 6 more bullets Imaging login to view 1 more bullet Studies login to view 6 more bullets Treatment login to view 3 more bullets Complications login to view 2 more bullets