Reports:
- Serum TSH is undetectable
- Serum T3 and T4 are at the upper end of the reference range.
Risk:
- Atrial fibrillation
- Osteoporosis
Treatment:
- Radioiodine therapy ( 131I ) or
- Low dose thionamide.
- Otherwise, annual review is essential,
Risk:
- The conversion rate to overt thyrotoxicosis is 5% each year.