Although<unk>  is not associated with a specific gene, there is evidence that some cases may be inherited. Relaxation or a lack of muscle tone in the upper airway may be a factor. It is often worse when the infant is on his or her back, because the floppy tissues can fall over the airway opening more easily in this position.
Laryngomalacia
Tracheobronchomalacia
Laryngotracheal stenosis
Tracheomalacia
Subglottic stenosis
Nasal septum deviation
Glossoptosis
Epiglottitis