CTICasesHypersensitivity Pneumonitis (HP) presenting with emphysema
Imaging findings
Progressive airspace enlargement, cystic changes, and septal thickening in never-smokers. Some cases show features of ground glass opacities and mosaicism, initially mimicking emphysema or fibrotic lung disease.
Key takeaways
Chronic or fibrotic HP can transition to an emphysema-like appearance in a subset of patients, specifically those with antigen sensitivities (e.g., bird ownership).
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