title: [Orbital osteoma: clinical evaluation of nine cases].
abstract: BACKGROUND
  Osteoma of the nasosinus cavities, particularly the frontoethmoidal cavities, is often a fortuitous radiographic discovery. Potential complications include ophthalmological, sinusal, and endocranial disorders.
  
  
  METHODS
  Nine patients (five men and four women), mean age 24.3 years (18-43) presenting orbital osteoma were managed from 1994 to 1999.
  
  
  RESULTS
  Clinical signs were dominated by ophthalmological disorders, basically non-reducible exophthalmia (n = 8). Two patients had permanent unilateral nasal obstruction and one had acute sinusitis. The bony orbital tumefaction was located in the superior medial angle in five patients. Radiography (Blondeau view) demonstrated an opacity in the sinus with an orbital extension. Computed tomography, performed in all patients, identified the lesion location: ethmoidofrontal (n = 4), anterior ethmoidal (n = 2), frontal (n = 2), ethmoidomaxillary (n = 1). There were no endocranial extensions. Surgery was undertaken for eight patients generally via the transfacial approach (n = 7); a bicoronal approach was used for one patient. En bloc resection (n = 4) or fragmentation (n = 4) was performed. There was one postoperative complication: regressive diplopy. These patients have been followed regularly with clinical and radiographic explorations and have been free of relapse for 2 to 6 years.
  
  
  CONCLUSIONS
  Frontoethmoidal osteoma is a relatively rare benign tumor. Severity depends on the orbital and endocranial extension. Imaging provides the positive diagnosis and guides the surgical approach. Therapeutic indications depend on the tumor size, its course, and the development of complications. We observed total relapse free outcome after complete resection.
authors.affiliation: Service d'ORL et de Chirurgie Maxillo-Faciale, Hôpital des Spécialités, CHU Avicenne, Rabat, Maroc. elkohenasm@hotmail.com
authors.forename: A
authors.initials: A
authors.lastname: El Kohen
authors.forename: M
authors.initials: M
authors.lastname: Lahlou
authors.forename: G
authors.initials: G
authors.lastname: Rabeh
authors.forename: A
authors.initials: A
authors.lastname: Benjelloun
authors.forename: A
authors.initials: A
authors.lastname: Lazrak
authors.forename: N
authors.initials: N
authors.lastname: Jazouli
authors.forename: M
authors.initials: M
authors.lastname: Kzadri
mesh_terms: D000293:Adolescent; D000328:Adult; D004172:Diplopia / Q000209:etiology; D005005:Ethmoid Sinus / Q000601:surgery; D005094:Exophthalmos / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D005626:Frontal Sinus / Q000601:surgery; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000601:surgery; D015508:Nasal Obstruction / Q000209:etiology; D009918:Orbital Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D010016:Osteoma / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis / Q000601:surgery; D011183:Postoperative Complications; D012852:Sinusitis / Q000209:etiology; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome