Congenital nasal pyriform aperture stenosis (CNPAS) is a rare condition that causes airway obstruction in newborn children, which was first described in 1989 ().It is caused by an overgrowth of ...

Hyperoxia upregulates lung trypsin and metalloproteinase (MMP-8) noted in the bronchoalveolar lavage fluid along with an increase in alveolar capillary permeability. This suggests a role in the ...