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The posterior glottis.

J C McIlwain1

  • 1Department of Otolaryngology, Belfast City Hospital, Northern Ireland.

The Journal of Otolaryngology
|June 1, 1991
PubMed
Summary
This summary is machine-generated.

This study redefines the posterior glottis, revealing its integral connection to the subglottis. This finding necessitates a revised understanding of laryngeal anatomy and cancer staging.

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Area of Science:

  • Laryngology
  • Anatomy
  • Embryology

Background:

  • The posterior glottis, often termed the posterior commissure or interarytenoid region, lacks a precise definition.
  • Existing terminology is inadequate for describing this distinct laryngeal area.

Purpose of the Study:

  • To provide a new definition for the posterior glottis.
  • To investigate the posterior glottis in relation to embryology, anatomy, and disease spread.
  • To re-evaluate laryngeal structure and cancer staging.

Main Methods:

  • Examination of nearly 300 larynges.
  • Analysis of embryological development, epithelial characteristics, mathematical dimensions, gross and microanatomy, submucosal spaces.
  • Investigation of carcinoma spread patterns.

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Main Results:

  • Identification of a pharyngoglottic duct dividing the embryonic larynx.
  • Confirmation of respiratory epithelium in the posterior glottis of neonates and non-smokers.
  • Demonstration of direct carcinoma spread from the posterior glottis to the subglottis.

Conclusions:

  • The posterior glottis is anatomically and functionally inseparable from the subglottis.
  • A new definition of the larynx is required, challenging current American Joint Committee on Cancer Staging and U.I.C.C. classifications.
  • Understanding the posterior glottis as part of the subglottis impacts laryngeal cancer staging and treatment strategies.