A 3-month-old child presents with intermittent strider. Most likely cause is –

Laryngomalacia Laryngomalacia is the most common congenital laryngeal anomaly. It is the most common cause of stridor in infants and children. Symptoms appear in the first 2 weeks of life and increase in severity for up to 6 months. The typical presentation is inspiratory stridor which is exacerbated by any exertion (crying, agitation, feeding), supine position, and viral infection of URT. Stridor is due to partial collapse of a flaccid supraglottic airway during inspiration.