FOB-BAL Patterns

Neutrophil-Predominant BAL

  • Bacterial Pneumonia:
  • BOOP

Lymphocyte-Predominant BAL

  • HP
  • Sarcoid
  • TB
  • Fibrosis

BAL Eosinophilia (>20%)

  • Pulmonary Eosinophilia: due to Acute Eosinophilic Pneumonia, Chronic Eosinophilic Pneumonia, IPF
  • Infection: Strongyloides, PCP, TB, Cocci
  • ABPA:
  • Rheum Diseases: RA, Sjogren’s,
  • Drug-Induced Lung Disease:
  • Hypereosinophilic Syndrome:
  • Churg-Strauss Sydrome:
  • GVHD (in BMT/SCT):
  • Lung Allograft Rejection:
  • Sarcoidosis:

BAL with Hemosiderin-Laden Macrophages (>20%)

  • DAH