Collaborative Hypertext of Radiology

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

Yong H. Hahn, MD - 2 February 1995
Last updated: 1 October 2013