- Bronchial abnormality
- Check-valve mechanism, causes progressive hyperinflation of affected lobe
- Tends to reduce with time in asymptomatic patients
- Needs excision in symptomatic children
- Left upper lobe (42%)
- Right middle lobe (35%)
- Radioopacity in affected lobe in postnatal period due to fluid
- With time, hyperinflation with hyperlucency of affected lobe
- CT: rules out other causes – vascular anomalies, compression of bronchi or mediastinal masses
Biyyam, Deepa R., et al. “Congenital lung abnormalities: embryologic features, prenatal diagnosis, and postnatal radiologic-pathologic correlation.” Radiographics 30.6 (2010): 1721-1738.
Zylak, Carl J., et al. “Developmental lung anomalies in the adult: radiologic-pathologic correlation.” Radiographics 22.suppl_1 (2002): S25-S43.