[Frontal sinus osteoma as a cause of purulent meningitis].

Introduction: Osteomas are benign tumours located within bones or developing on them (1). The incidence of osteomas is as follows: frontal, ethmoid and maxillary, while they are extremely rare in the sphenoid sinus (2). Most often they are localized on sutures, and extremely rarely on occipital squama (3).