Bronchopulmonary sequestration Bronchopulmonary sequestration also called accessory lung or pulmonary sequestration, is a rare congenital cystic piece of abnormal lung
Pyriform aperture stenosis Congenital nasal pyriform aperture stenosis is a very rare and potentially lethal form of upper airway obstruction in newborns where the front opening of the nose is narrow due to an overgrowth