[Pituitary adenoma apoplexy after spinal anaesthesia. Report of two cases and review of the literature].

Two cases of pituitary apoplexy occurring after spinal anaesthesia are described. Both presented with headache and III par palsy, one of them with additional visual disturbance and hyponatremia. A bibliographical review has been done, looking for early diagnostic keys. We propose the arterial hypotension as a possible pathogenetic mechanism of pituitary adenoma apoplexy.