Management of supraglottic dysgenesis presenting as laryngomalacia.

Laryngomalacia is a common source of stridor and can lead to significant upper airway obstruction and feeding disturbances in infants. We describe a unique case of supraglottic dysgenesis presenting as laryngomalacia featuring a prominent "s-shaped" epiglottis with both posterior edges fused to the right aryepiglottic fold/arytenoid complex. Although this anomaly is not accounted for in any of the current laryngomalacia classification schemes, modified laser supraglottoplasty was a satisfactory approach leading to successful decannulation. Laryngeal embryology and possible timing of the pathogenesis of this rare occurrence are reviewed as well.