[Ethmoid sinus osteoma with orbital extension]. / Orbital yayilimli etmoid sinüs osteomu.

Osteoma is the most common neoplasm of the paranasal sinuses. A fifty-year-old woman who had presented with complaints of protrusion of the eyeball and double vision was referred to our department with a diagnosis of proptosis. Computed tomography of the paranasal sinuses and the orbits showed a high-density mass of 2x3 cm, involving the left ethmoidal cells laterally, the left maxillary sinus superomedially, the left orbit inferomedially, and the nasal cavity superiorly. The mass was removed through the external ethmoidectomy approach. Postoperatively, all visual functions improved. The pathologic diagnosis was osteoma.