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Keywords:

  • hyperthyroidism;
  • Graves' disease;
  • hydrocephalus;
  • headache

We report a 32-year-old woman presenting with progressive symptoms of increased intracranial pressure and slight enlargement of the ventricles on CT scan. The underlying cause was hyperthyroidism due to Graves' disease. With treatment to correct the hyperthyroid state, all symptoms rapidly disappeared. The rare onset of hyperthyroidism with symptoms indicating intracranial hypertension, and the possible pathophysiologic mechanisms are discussed.