Respiratory Obstruction
Respiratory obstruction, including laryngeal stenosis, may occur in newborns. The mortality rate due to respiratory distress can approach 25% in early infancy.
Hypoplastic Cartilage
Hypoplastic cartilage in the trachea and larynx causes voice abnormalities and breathing difficulty.
Small Auditory Canals
Small auditory canals are characteristic, but this does not usually impair hearing. However, deformity of the middle ear ossicles can result in hearing loss.