Abstract:

Objective  To provide lamellar sectional anatomy data of coronal for endoscopic sphenoidotomy.  Methods  A digital freezing milling technique was used to obtain continuous sectional data of coronal as thin as 0.1mm.of 10 cadaver heads(20 sides) without organic lesions. The sphenoid sinus and some surrounding structures were observed on typical and continuous coronal sectional images.  Results  75% of the sphenoid sinus was sellae type,  only 15% of the septum located in the median sagittal section,  60% of the optical nerve canal and 75% of the internal carotid bulge on the area of the lateral sphenoid sinus. Conclusion  The lamellar coronal sectional image obtained from digital freezing milling technique offers a better understanding of the complex anatomic structures and provides sectional anatomy data for sphenoidotomy.

Key words: Sphenoid sinus； Endoscope； Sphenoidotomy； Coronal； Sectional anatomy； Freezing milling technique