Unusual Large Ethmoidal Osteoma with Orbital Extension

Large osteomas of the fronto-ethmoidal cavities are very rare benign tumors. Headache and ocular signs are the most common symptoms. Imaging allows the diagnosis. Treatment of ethmoid sinus osteoma is surgical. One case with orbital extension is reported and discussed. A 30 years-old male; complaining of swelling of themedial angle of the right eye. Computed tomography showed a right ethmoidal process with orbital extension. The tumor was removed through an external ethmoidectomy. Histological examination confirmed diagnosis. The patient's follow-up for the last 12 months was normal. The clinical characteristics and treatment of this disease remain controversial; this case report highlights the epidemiological, clinical, radiological, treatment and histological aspects of this rare disease.