Hypothyroidism - Differential Diagnosis Algorithm
Central Hypothyroidism
• Isolated TSH Deficiency
• Panhypopituitarism
Thyroid Hormone Resistance
Iatrogenic
Primary Hypothyroidism
- Transient
• Subacute Lymphocytic / Granulomatous
• Thyroiditis
• Post-Partum Thyroiditis
• Subtotal Thyroidectomy
- Infiltrative Disease
• Fibrous Thyroiditis
• Hemosiderosis
- Congenital Thyroid Agenesis/ Degenesis
• Severe Iodine Deficiency
- Medications
• Thionamides
• Lithium
• Amiodarone
• Interferon
- Central Hypothyroidism
• Hashimoto's Thyroiditis
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