Study of Neuroendoscopic Anatomy Related with Transsphenoidal Approach to Sellar Region

Objective To provide the anatomical data for resection of the tumor in the sellar region by neuroendsoscope-assisted surgery through transsphenoidal approach.Methods The transsphenoidal approach to the sellar region was simulated in 15 formalin-fixed adult adaveric heads(30 sides) and 5 fresh adult adaveric heads(10 sides).The structures related to the transsphenoidal approach to the sellar region were observed under a neuroendscope.Results The ostia of sphenoid sinuses were observed in 8 sides of 5 fresh adaveric heads and 21 sides of 15 formalin-fixed adaveric heads.The optic canal processes were observed in 5 sides of 5 fresh adaveric heads and 12 sides of 15 formalin-fixed adaveric heads.The carotid artery processes were observed in 8 sides of 5 fresh adaveric heads and 22 sides of 15 formalin-fixed adult adaveric heads.The part structures in the sellar region and cavernous sinus region were directly observed after the lateral wall of the sphenoidal sinus was opened.Conclusion The knowledge of the anatomy of the sphenoid sinus and its adjacent structures is important for the precise location and establishment of stereoscopic ideal in the transsphenoidal endoscopic-assisted surgery.