Fig.3. Stages of an approach to the anterior wall of the sphenoid sinus and the Turkish saddle:
1 - residues of the resected nasal septum and a perpendicular plate of the ethmoid bone; 2 - drawn-off leaves of a mucous membrane; 3 - a nasal mirror; 4 - staged formation of an opening in the anterior wall of the sphenoid sinus; 5 - the saddle fundus.