[Frontal osteoma apropos of a case]

We report a case of frontal sinus osteoma in a 66-year-old woman, with headache and deformation of the upper-inner orbit wall; it was satisfactorily solved by means of osteoplastic technique with the aid of surgical microscope. We emphasize the extrasinusal extension, and specially when the osteoma grows towards the orbit or the endocranium, in order to settle on the surgical technique.