The clinical and radiological features of the empty sella syndrome.

The importance of the empty sella syndrome has increased with recent interest in pituitary micro-adenomas, trans-sphenoidal hypophysectomy and computerised tomography. Four cases of the empty sella syndrome which illustrate the clinical and radiological features are reported, and the literature is reviewed. Headache, visual symptoms and endocrine disturbances are commonly found in association with the empty sella syndrome, and the coexistence of pituitary micro-adenomas is well recognised. Symmetrical ballooning of the sella turcica without changes in configuration is the typical finding with plain radiography, but occasionally more extensive destructive changes in the region of the pituitary fossa may occur. Provided that the correct angulation, collimation and level of cut are chosen, computerised tomography now may be used to make a definitive diagnosis, making air encephalography unnecessary.