[Pituitary apoplexy. A review].

Pituitary apoplexy constitutes a syndrome that is characterized by the ischemic infarction or hemorrhage into a pituitary tumour. Clinically the patient develops sudden headache, meningismus, visual disturbances, even blindness, and occasionally decrease in level of consciousness. To diagnose it is basic to perform a cerebral MRI. Treatment consists in urgent sellar decompression by transsphenoidal surgery and substitute therapy with steroids.