• A S Umur, K Gunhan, M Songu, C Temiz, and A V Yuceturk.
• Celal Bayar University Hospital, Department of Neurosurgery, Manisa, Turkey.
• Rev Laryngol Otol Rhinol (Bord). 2008 Jan 1; 129 (4-5): 333-6.

BackgroundOsteomas of the paranasal sinuses rarely cause intracranial manifestations. A neurological symptom may be the first sign of a previously unrecognized osteoma.Case DescriptionA 28-year-old male was referred with one episode of witnessed tonic-clonic seizure and loss of consciousness. Radiologic examination revealed a calcific mass in the frontal sinus and a cystic structure was detected in the posterior component of the lesion. The patient underwent a combined nasal endoscopic approach and a bilateral frontal osteoplastic craniotomy. The ossifying tumoral tissue and the polypoid soft tissue mass were removed. The histo-pathologic diagnosis of the hard, bony tumor was consistent with an osteoma and the polypoid soft tissue was an inflammatory polyp.ConclusionThis case report illustrates a rare and life threatening complication of a frontal sinus osteoma with an intracranial extension of an inflammatory polyp.

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