• Graves' disease
  • Toxic multinodular goiter
  • Toxic adenoma
  • Subacute (de Quervain's) thyroiditis
  • Hashimoto's thyroiditis (may have initial hyperthyroid phase)
  • Exogenous thyroid hormone ingestion
  • Postpartum thyroiditis
  • Jod-Basedow phenomenon (in endemic or multinodular goiter, hyperthyroidism due to high iodine intake, eg, amiodarone, radiocontrast)
  • Thyroiditis after radioiodine administration
  • Amiodarone-induced thyroiditis
  • Struma ovarii
  • High hCG level: pregnancy, trophoblastic tumor, testicular malignancy
  • Thyroid secreting hormone hypersecretion by pituitary tumor (rare)
  • "Subclinical" hyperthyroidism: low thyroid secreting hormone, clinically euthyroid, normal T4, common in elderly (10%), risk of atrial fibrillation and osteoporosis

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Last updated: December 1, 2014