Revision 13 for 'Sphenoid sinus'

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Sphenoid sinus

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
  • conchal
  • lateral recess
  • presellar
  • 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

See also

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