title: Intracranial extension of a nasal dermoid sinus cyst in a 56-year-old man.
abstract: BACKGROUND
  Nasal dermoid sinus cysts are rare congenital lesions that result from aberrant embryonal development. Cases of nasal dermoids associated with intracranial extension have been reported in the past, but have almost always occurred in children.
  
  
  METHODS
  One case of a nasal dermoid cyst with intracranial involvement in a 56-year-old man is reported herein.
  
  
  RESULTS
  A 56-year-old man presented with a draining sinus in the right medial canthal area and a nasal pit. Imaging studies suggested a nasal dermoid cyst with intracranial extension. He subsequently underwent a craniofacial removal of the lesion with a satisfactory postoperative course.
  
  
  CONCLUSIONS
  That nasal dermoid cysts can remain dormant until the age of 56 suggests that the incidence of this lesion with intracranial extension may be higher than previously reported. A one-stage combined otolaryngologic/neurosurgical procedure is advocated for those lesions that are extra- and intracranial.
authors.affiliation: Department of Otolaryngology, University of Toronto, Mount Sinai Hospital, Ontario, Canada.
authors.forename: D C
authors.initials: DC
authors.lastname: Hacker
authors.forename: J L
authors.initials: JL
authors.lastname: Freeman
mesh_terms: D003399:Craniotomy / Q000379:methods; D003884:Dermoid Cyst / Q000151:congenital / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009669:Nose Neoplasms / Q000151:congenital / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D013524:Surgical Flaps / Q000379:methods; D014057:Tomography, X-Ray Computed