Stephen J. Schueler, M.D.

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Croup Anatomy

To better understand croup, it helps to understand the anatomy of the upper airway and larynx.

The larynx is part of the upper airway. It begins at the lower pharynx, and extends down to the trachea. From the outside, it is the area called the Adam's apple in the front of the neck.

The larynx consists of:

  • Epiglottis
  • Vocal cords
  • Subglottic area
  • Thyroid cartilage

Larynx examples:
  • Rear view of larynx
  • Top view of epiglottis with x-ray of enlarged epiglottis
  • Normal pharynx in adult
  • Normal pharynx and epiglottis in child

Last Updated: Nov 3, 2008 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Croup References
  1. Bjornson CL, Klassen TP, Williamson J, Brant R, Mitton C, Plint A, Bulloch B, Evered L, Johnson DW; Pediatric Emergency Research Canada Network. A randomized trial of a single dose of oral dexamethasone for mild croup. N Engl J Med. 2004 Sep 23;351(13):1306-13. [15385657]
  2. Custer JR. A randomized trial of a single dose of oral dexamethasone for mild croup. J Pediatr. 2005 Mar;146(3):434-5. [15756240]
  3. Griffin S, Ellis S, Fitzgerald-Barron A, Rose J, Egger M. Nebulised steroid in the treatment of croup: a systematic review of randomised controlled trials. Br J Gen Pract. 2000 Feb;50(451):135-41. [10750214]
  4. Johnson D. Croup. Clin Evid. 2004 Dec;(12):401-26. [15865647]
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