CTICasesChronic hypersensitivity pneumonitis
Imaging findings
Chest CT shows bilateral parenchymal reticulation, traction bronchiectasis, and bronchovascular-centered fibrosis away from the pleural surface, with areas of lobular air trapping on expiration, without basal predominance or honeycombing. Surgical lung biopsy confirmed chronic airway-centered fibrosis and interstitial granulomas.
Key takeaways
Chronic hypersensitivity pneumonitis typically presents radiographically with bronchovascular-centered or mid-to-upper lung predominant reticular opacities, traction bronchiectasis, and lobular air trapping. It must be differentiated from idiopathic pulmonary fibrosis, and identifying the offending antigen is essential for management.
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