<prompt> Most common congenital abnormality of the larynx is:LaryngomalaciaLaryngeal webSubglottic stenosisSubglottic haemangioma  <response>: Laryngomalacia: Ref: 353-D 272-D 4thLARYNGOMALACIA Congenital Laryngeal strider is the most common congenital abnormality of the larynx The condition manifests at birth or soon after, and usually disappears by 2 years of age It is characterized by excessive flaccidity of supraglottic larynx which is sucked in during inspiration producing stridor and sometimes cyanosis Stridor is increased on crying but subsides on placing the child in prone position. Cry is normal Direct laryngoscopy shows elongated epiglottis, curled upon itself omega-shaped floppy aryepiglottic folds and arytenoids Treatment is conservative, Tracheostomy for severe respiratory obstruction. 