hypersensitivity pneumonitis

• pathology:
  • proliferation of epithelial cells
  • elaboration of reticulum fibers

• findings:
  • interstitial reticulonodular pattern (basilar distribution)
  • volume loss (cicatrization atelectasis) in upper lobes
  • pleural effusion (rare)
  • lymph node enlargement may occur

© 2002, C.E. Kahn, Jr.
2002-04-18