II. Definition
- Acute Thyroiditis due to neck radiation
III. Epidemiology: Incidence
- Occurs in 1% of patients on I-131 for Hyperthyroidism
IV. Causes
- Radioiodine therapy (I-131) for Hyperthyroidism
- Head and neck radiation for Lymphoma
- High dose irradiation
- Pre-existing Hypothyroidism
- Younger women
VI. Signs
- Thyroid tenderness to palpation
VII. Labs
-
Thyroid Function Tests (TSH, T4 Free)
- Hyperthyroidism surges temporarily
VIII. Management
-
Thyroid Pain
- NSAIDs
- Prednisone if refractory to NSAIDs
- Short course at 40-60 mg orally daily with taper
-
Hyperthyroidism symptoms
- Beta Blocker (e.g. Propranolol)
IX. Course
- Resolves in 6-18 weeks as Thyroid fibrosis occurs
