Hyperthyroidism - Differential Diagnosis Algorithm
High/Normal Radioiodine Uptake
- Autoimmune Thyroid Disease:
• Grave's Disease
• Positive anti-TSH Receptor Antibody
- Autonomous Thyroid Tissue:
• Toxic Adenoma
• Toxic Multinodular Goiter
- TSH/HCG Excess:
• TSH-Secreting Pituitary Adenoma
• Gestational Trophoblastic Neoplasm
Low Radioiodine Uptake
- Subacute Thyroiditis:
• Granulomatous
• Lymphocytic
• Postpartum
• Amiodarone
• Radiation
- Exogenous/Ectopic Hormone:
• Excessive Thyroid Drug
• Struma Ovarii
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