Pediatric Hypersensitivity Pneumonitis

  • Etiology: Immune mediated inhalational diffuse lung disease involving organic or inorganic antigens less than 5 microns in diameter that are deposited in alveoli and lead to small airway inflammation and fibrosis with the classic antigen being a fungus
  • Imaging:
    — Non-fibrotic type has nodules, ground glass opacity, air trapping
    — Fibrotic type has scarring and end stage lung disease
  • DDX:
  • Complications:
  • Treatment:
  • Clinical:

Radiology Cases of Hypersensitivity Pneumonitis

CXR and CT of pediatric hypersensitivity pneumonitis
CXR AP (above) and coronal CT without contrast of the chest (below) show nodules with associated ground glass opacities distributed throughout the lungs.