[A woman with a pituitary stone].

A 78-year-old female patient was presented with acute onset nystagmus and vertigo. A magnetic resonance imaging (MRI) was performed that revealed a pituitary stone. Metabolic imbalances have been described as their cause. Endocrinological analysis showed an elevated corrected serum calcium level (2.77 mmol/L). Further nuclear radiology analysis exposed a primary hyperparathyroidism.