List DDs.
Pulmonary hypoplasia
Underdevelopment of the lungs characterized by a decreased number of alveoli and small airways and reduced lung volumes in one or both lobes
Results in impaired gas exchange and severe respiratory distress that may require intubation
Associated with congenital diaphragmatic hernia (usually left-sided), oligohydramnios, and Potter sequence
Congenital diaphragmatic hernia
Pneumothorax
Neonatal pneumonia
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