The frontal sinus in frontoethmoidal meningoencephaloceles.

We performed a review of all patients with frontoethmoidal meningoencephaloceles (FEME) in whom frontal sinus development would be expected to be complete. Frontal sinus absence is the predominant finding. The potential role of the FEME in producing a structural blockage to normal frontal sinus development is suggested. Surgical correction of the encephalocele should include augmentation of the glabella to compensate for the combined effects of the FEME and the surgical osteotomies in this region.