title: Medialization of the lamina papyracea after endoscopic ethmoidectomy: comparison of preprocedure and postprocedure computed tomographic scans.
abstract: OBJECTIVE
  The purpose of this article is to report computed tomography demonstration of medial bowing of the lamina papyracea in 5 patients after internal ethmoidectomy.
  
  
  METHODS
  We identified 5 patients who had apparent medial bowing of the lamina papyracea after functional endoscopic sinus surgery (FESS) and who had preoperative scans available. Preoperative and postoperative scans were reviewed using a 3-dimensional workstation to ensure similar angulation of the slices before measurement. Measurements of the interorbital distance and also the position of the posterior margin of the globe relative to a line connecting the lateral orbital walls were performed.
  
  
  RESULTS
  Each of the patients demonstrated a decrease in the interorbital distance on the postoperative scan. Measurement of globe position showed that 9 of the 10 globes lay in a more posterior position within the orbit on postoperative examination.
  
  
  CONCLUSIONS
  Medial bowing of the lamina papyracea may occur as a result of FESS and may lead to relative enophthalmos in comparison. The incidence of this phenomenon is unknown because most patients are not reimaged after FESS.
authors.affiliation: Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA. Mary_Beth_Cunnane@meei.harvard.edu
authors.forename: Mary Elizabeth
authors.initials: ME
authors.lastname: Cunnane
authors.forename: Michael
authors.initials: M
authors.lastname: Platt
authors.forename: Paul A
authors.initials: PA
authors.lastname: Caruso
authors.forename: Ralph
authors.initials: R
authors.lastname: Metson
authors.forename: Hugh D
authors.initials: HD
authors.lastname: Curtin
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D004724:Endoscopy; D005004:Ethmoid Bone / Q000000981:diagnostic imaging* / Q000601:surgery*; D005005:Ethmoid Sinus / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D011182:Postoperative Care / Q000379:methods; D011300:Preoperative Care / Q000379:methods; D011379:Prognosis; D012852:Sinusitis / Q000601:surgery*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016896:Treatment Outcome