- 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: