Congenital lobar hyperinflation

  • 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
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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.