United States The prevalence of<unk>  widely varies with the population studied. In a 1987 study 3% of infants admitted to the neonatal intensive care unit (NICU) developed<unk> . International Studies reflecting international frequency demonstrated that 2-3% of all infants in NICUs develop<unk> . When limiting the population studied to premature infants, this frequency increases to 20-30%, with the highest frequencies occurring in infants weighing fewer than 1000 g.
Pulmonary interstitial emphysema
Pulmonary alveolar microlithiasis
Focal lung pneumatosis
Pulmonary consolidation
Interstitial lung disease
Pulmonary hyalinizing granuloma
Lymphocytic interstitial pneumonia
Pulmonary infiltrate