Acquired subglottic cysts: a case-control study

Abstract

Background: Subglottic cysts (SGCs) are rare but important causes of stridor in infants. They may cause significant upper airway obstruction and potentially lethal consequences, particularly when exacerbated by upper respiratory tract infections. Although typically seen in preterm infants, there is a lack of literature regarding their aetiology apart from the common finding of preterm birth and intubation. Previous studies have reported series of cases without control groups. We aimed to determine the risk factors in patients with SGCs compared to a matched cohort of intubated patients who did not develop cysts.