Frontal sinus pneumocele. A case report.

A pneumocele refers to an aerated sinus with either focal or generalized thinning of the bony sinus wall. Although the pathogenesis of a pneumocele is not yet known, it is presumed that increased intrasinusal pressure, due to a one-way valve between the nasal cavity and the affected sinus, is responsible for this condition. A 37-year-old man with frontal bossing, who underwent surgery for cosmetic reasons, is presented.