Revision 13 for 'Sphenoid sinus'All Revisions
The sphenoid sinus is the most posterior paranasal sinus. It lies antero-inferior to the sella. It is important to look for the variable pneumatization of this sinus and to report the relationship of neurovascular structures.
Pneumatization starts at around 2 year of age and it develops more slowly than the other paranasal sinuses.
Types of pneumatization
- lateral recess
- sellar (which can be incomplete or complete)
Variations with respect to optic nerve relationship
- type 1 - adjacent to sphenoid sinus
- type 2 - indenting the sinus
- type 3 - traversing the sinus
- type 4 - adjacent to posterior ethmoid sinus