title: Ethmoid silent sinus syndrome causing inward displacement of the orbit: case report.
abstract: OBJECTIVE
  We describe a previously unreported case of ethmoid silent sinus syndrome.
  
  
  METHODS
  Case report and review of the world literature regarding silent sinus syndrome.
  
  
  RESULTS
  A 33-year-old woman developed medial displacement of the left orbital contents in the absence of trauma, surgery or other significant pathology. Imaging showed opacification of the left ethmoid sinus and implosion of the medial orbital wall. Previously reported cases of silent sinus syndrome have all involved the maxillary sinus, with subsequent implosion of the orbital floor. Computed tomography scans of our patient showed wide, flat ethmoidal bulla and surrounding cells, with few horizontal bony septae reinforcing the area of collapse.
  
  
  CONCLUSIONS
  This case represents the first report of ethmoid silent sinus syndrome. We argue that, in anatomically susceptible individuals, the silent sinus syndrome can present due to chronic ethmoidal sinusitis.
authors.affiliation: Division of Surgery, Gold Coast Hospital, Southport, Australia. bennymac@bigpond.net.au
authors.forename: B
authors.initials: B
authors.lastname: McArdle
authors.forename: C
authors.initials: C
authors.lastname: Perry
mesh_terms: D000328:Adult; D015841:Enophthalmos / Q000000981:diagnostic imaging / Q000209:etiology*; D005260:Female; D006801:Humans; D015523:Maxillary Sinusitis / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D009916:Orbital Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D013577:Syndrome; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome