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

Ans. is 'b' i.e., Laryngomalacia Larvngomalacia o Laryngomalacia is the most common congenital laryngeal anomaly. o 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 upto 6 months. Typical presentation is inspiratory stridor which is exacerbated by any exeion (crying, agitation, feeding), supine position, and viral infection of U. Stridor is due to paial collapse of a flaccid supraglottic airway during inspiration.