Definition

• Desquamative interstitial pneumonia (DIP)
  • A rare but distinct type of interstitial lung disease (ILD)
  • Characterized by macrophage infiltration of the intra-alveolar spaces
  • Found exclusively in cigarette smokers
• Respiratory bronchiolitis–associated ILD (RB-ILD)
  • A subset of DIP that is clinically less severe
  • Characterized by the accumulation of macrophages in peribronchial alveoli
• See also Interstitial Lung Disease.

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