title: Frontal sinus osteoma complicated with intracranial inflammatory polyp: a case report and review of the literature.
abstract: BACKGROUND
  Osteomas of the paranasal sinuses rarely cause intracranial manifestations. A neurological symptom may be the first sign of a previously unrecognized osteoma.
  
  
  METHODS
  A 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.
  
  
  CONCLUSIONS
  This case report illustrates a rare and life threatening complication of a frontal sinus osteoma with an intracranial extension of an inflammatory polyp.
authors.affiliation: Celal Bayar University Hospital, Department of Neurosurgery, Manisa, Turkey.
authors.forename: A S
authors.initials: AS
authors.lastname: Umur
authors.forename: K
authors.initials: K
authors.lastname: Gunhan
authors.forename: M
authors.initials: M
authors.lastname: Songu
authors.forename: C
authors.initials: C
authors.lastname: Temiz
authors.forename: A V
authors.initials: AV
authors.lastname: Yuceturk
mesh_terms: D000328:Adult; D001927:Brain Diseases / Q000150:complications*; D004660:Encephalitis / Q000150:complications*; D005626:Frontal Sinus; D006801:Humans; D008297:Male; D010016:Osteoma / Q000150:complications*; D010255:Paranasal Sinus Neoplasms / Q000150:complications*; D011127:Polyps / Q000150:complications*