The diagnosis is made by the clinical picture and the chest X-ray, which demonstrates decreased lung volumes (bell-shaped chest), absence of the thymus (after about six hours), a small (0.5–1 mm), discrete, uniform infiltrate (sometimes described as a "ground glass" appearance or "diffuse airspace and interstitial opacities") that involves all lobes of the lung and air-bronchograms (i.e. the infiltrate will outline the larger airways passages, which remain air-filled). In severe cases, this becomes exaggerated until the cardiac borders become indiscernable (a 'white-out' appearance).
Infant respiratory distress syndrome
Alveolar capillary dysplasia
Neonatal sepsis
Neonatal meningitis
Shaken baby syndrome
Apnea of prematurity
Transient tachypnea of the newborn
Omphalitis of newborn