title: A morphometric study of the larynx.
abstract: OBJECTIVE
  Describe anatomical measurements of a selection of laryngeal structures, performing a comparison of such measurements between men and women and between different age groups.
  
  
  METHODS
  Populational morphometric study.
  
  
  METHODS
  Larynges from 50 male and 50 female fresh cadavers of older than 40 years were removed during autopsy.
  
  
  METHODS
  The following measurements were made on the external angle laryngeal framework between the blades of the thyroid cartilage: width of the thyroid cartilage, distance from the thyroid notch to the anterior commissure (AC), distance from the AC to the inferior thyroid border, distance from the AC to the larynx proeminence, length of membranacea part of vocal fold (VF), length of cartilaginea part of VF, width and thickness of true VF.
  
  
  RESULTS
  The differences between men and women were highly significant. All measured values of larynx obtained in the study were greater in men than in women, except for the thyroid angle, which was higher in women (P < 0.05). A significant difference in the comparison between the morphological measurements in the age groups for both men and women was not observed (P > 0.05).
  
  
  CONCLUSIONS
  The comparison of larynx dimensions showed the presence of sexual dimorphism in the group of South Brazilian people studied. There was no morphometric difference between the larynx samples of the individuals of the same sex after 40 years of age.
authors.affiliation: Morphological Sciences Department/Basic Sciences of Health Institute, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil. Electronic address: geraldo.jotz@terra.com.br.
authors.forename: Geraldo Pereira
authors.initials: GP
authors.lastname: Jotz
authors.affiliation: Morphological Sciences Department/Basic Sciences of Health Institute, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
authors.forename: Marco Antônio
authors.initials: MA
authors.lastname: Stefani
authors.affiliation: General Hospital of Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.
authors.forename: Omero
authors.initials: O
authors.lastname: Pereira da Costa Filho
authors.affiliation: Morphological Sciences Department/Basic Sciences of Health Institute, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
authors.forename: Tais
authors.initials: T
authors.lastname: Malysz
authors.affiliation: Morphological Sciences Department/Basic Sciences of Health Institute, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
authors.forename: Paula Rigon
authors.initials: PR
authors.lastname: Soster
authors.affiliation: Human Anatomy Department, Universidade Ritter dos Reis, Porto Alegre, Rio Grande do Sul, Brazil.
authors.forename: Henrique Zaquia
authors.initials: HZ
authors.lastname: Leão
mesh_terms: D000328:Adult; D000367:Age Factors; D001344:Autopsy; D001938:Brazil; D002102:Cadaver; D005260:Female; D006801:Humans; D007830:Larynx / Q000033:anatomy & histology*; D008297:Male; D012727:Sex Characteristics; D012737:Sex Factors
keywords: Anatomy; Larynx; Morphometry; Pathology