Chronic Hypersensitivity Pneumonitis
Brief Discussion
Allergic lung disease resulted from inhalation of antigenic organic dusts.Three stages:
1. Acute
stage: diffuse poorly-defined air-space consolidation / ground-glass
attenuation.
Pathologically, alveolar filling of
polymorphonuclear cells, eosinophils, and lymphocytes.
2. Subacute stage:
fine nodular pattern showing peribronchial distribution.
3. Chronic stage:
patchy fibrosis.