Emphysema
Overinflation (no damage to alveolar septa yet)
Congenital
X-ray
- Compensatory (if lobectomy/collapse)
- Obstructive (bronchial obstruction, easier in than out)
Congenital
- Localised: lobar, segmental, subsegmental
- Generalised
- Interstitial (when air leaks)
X-ray