Fig. 1
From: Etiological profile of upper airway obstruction in infants
Causes of respiratory distress. a is showing laryngomalacia with curled epiglottis and sucked-in aryepiglottic folds. b is showing subglottic stenosis with airway narrowing at the cricoid region. Note that some whitish secretion appears above the stenosis which may be mistaken for laryngeal web. c is showing the thin subglottic laryngeal web extending from the undersurface of both vocal folds. Lastly, d is showing left vocal fold paralysis with limited vocal fold mobility in abduction