title: Idiopathic Subglottic Stenosis: A Comparison of Tracheal Size.
abstract: OBJECTIVE
  To assess the size of the cervical and thoracic trachea among female patients with idiopathic subglottic stenosis (SGS).
  
  
  METHODS
  Computed tomography (CT) scans of neck/chest from female patients with idiopathic SGS (n = 7) and normal controls (n = 30) were analyzed. Only female patients were included. The diameter and cross-sectional area of the trachea were measured at the level of the subglottic larynx, mid-cervical trachea, and mid-thoracic trachea. Measurements of tracheal size were compared between groups.
  
  
  RESULTS
  Patients with idiopathic SGS were found to have a significantly smaller cross-sectional area throughout the course of the cervical and thoracic trachea as compared to normal controls.
  
  
  CONCLUSIONS
  Idiopathic subglottic stenosis is a rare but distinct subclass of subglottic stenosis characterized by smaller cross-sectional area throughout the course of the subglottic, cervical, and thoracic trachea.
  
  
  METHODS
  3b: Individual case-control study.
authors.affiliation: Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA soroush.zaghi@gmail.com.
authors.forename: Soroush
authors.initials: S
authors.lastname: Zaghi
authors.affiliation: Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
authors.forename: Jose
authors.initials: J
authors.lastname: Alonso
authors.affiliation: Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Orestes
authors.affiliation: Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
authors.forename: Natalie
authors.initials: N
authors.lastname: Kadin
authors.affiliation: Department of Radiological Sciences, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
authors.forename: William
authors.initials: W
authors.lastname: Hsu
authors.affiliation: Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
authors.forename: Gerald
authors.initials: G
authors.lastname: Berke
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007829:Laryngostenosis / Q000000981:diagnostic imaging* / Q000473:pathology; D007830:Larynx / Q000000981:diagnostic imaging* / Q000473:pathology; D008875:Middle Aged; D009333:Neck; D009929:Organ Size; D013909:Thorax; D014057:Tomography, X-Ray Computed; D014132:Trachea / Q000000981:diagnostic imaging* / Q000473:pathology; D055815:Young Adult
keywords: airway; cross-sectional area; diameter; idiopathic subglottic stenosis; narrowing; subglottic stenosis; trachea; tracheal size