<unk>  <unk>  is a collection of air outside of the normal air space of the pulmonary alveoli, found instead inside the connective tissue of the peribronchovascular sheaths, interlobular septa, and visceral pleura. (This supportive tissue is called the pulmonary interstitium.) This collection of air develops as a result of alveolar and terminal bronchiolar rupture.<unk>  is more frequent in premature infants who require mechanical ventilation for severe lung disease. Infants suffering from<unk>  are typically recommended for admission to a neonatal intensive care unit.
Pulmonary interstitial emphysema
Pulmonary alveolar microlithiasis
Focal lung pneumatosis
Pulmonary consolidation
Interstitial lung disease
Pulmonary hyalinizing granuloma
Lymphocytic interstitial pneumonia
Pulmonary infiltrate