title: Intradural extension of mucocele complicating frontoethmoid sinus osteoma: case report.
abstract: BACKGROUND
  Osteomas of the paranasal sinus are often asymptomatic and are sometimes complicated by mucoceles, but intradural extension of such a mucocele has rarely been reported.
  
  
  METHODS
  This 67-year-old man with complaint of headache was diagnosed as having an intradural extension of a mucocele complicating an osteoma of the frontoethmoid sinus. A right frontobasal craniotomy was performed and a mucocele in the frontal sinus extending into the frontal lobe through two dural defects and the osteoma was removed completely. The patient was successfully treated without recurrence.
  
  
  CONCLUSIONS
  The importance of radical surgery for such lesions and the relationship between osteomas and mucoceles are discussed.
authors.affiliation: Department of Neurosurgery, Yokohama City University School of Medicine, Kanagawa-ken, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Manaka
authors.forename: K
authors.initials: K
authors.lastname: Tokoro
authors.forename: K
authors.initials: K
authors.lastname: Sakata
authors.forename: A
authors.initials: A
authors.lastname: Ono
authors.forename: I
authors.initials: I
authors.lastname: Yamamoto
mesh_terms: D000368:Aged; D004388:Dura Mater / Q000473:pathology / Q000601:surgery*; D005005:Ethmoid Sinus / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D005626:Frontal Sinus / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D006261:Headache / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009078:Mucocele / Q000150:complications / Q000473:pathology / Q000601:surgery*; D010016:Osteoma / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D010255:Paranasal Sinus Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed