LARYNGOMALACIA (OR CONGENITAL LARYNGEAL STRIDOR)
The infant’s larynx is naturally somewhat different in shape to that of the adult, with some backward folding and overhanging of the epiglottis being usual. In a small proportion of children this is accompanied by some elongation of the epiglottis, and the structures above the true vocal cords are soft and somewhat floppy. This leads to a tendency for the upper part of the larynx to be drawn inward by the flow of inspired air when the infant breaths in. This produces a characteristic crowing, inspiratory stridor.