Hyperaeration of the sphenoid sinus: Cause for concern?

A case of exuberant pneumatization of the left sphenoid sinus into the pter ygoid process and floor of the middle cranial fossa is presented. The fact that pneumatization of the sphenoid sinus is frequently atypical is of clin ical import because there is an intimate relationship between the contents of a hyperaerated sinus and adjacent vital facial and cranial structures. I t is imperative that clinicians determine the location and extent of the wa lls of the sphenoid sinus and its relationship to adjacent vital structures whenever endoscopic sinus surgery is contemplated to avoid morbid conseque nces during surgery.