METHODS: Data were collected from 13 patients between September 2001 and June 2002.

RESULTS: The preferred way for surgery of pituitary adenomas is the transsphenoidal approach. Transsphenoidal surgery has some difficulties because of the narrow and long way to deep sella and carotid artery neighborhood. The only reference is anatomic landmarks for not to lose the midline, because fluoroscopy, which is used for imaging in transsphenoidal surgery, provides only two-dimensional images in the sagittal plane. Serious complications may occur because of normal anatomical variations and anatomical deformations in recurrent surgery.

CONCLUSION: Neuronavigation provides images in sagital, horizontal and coronal planes, and diminishes the complications caused by orientation difficulties. Anahtar Kelimeler : Neuronavigation, pituitary adenoma, transsphenoidal surgery