CTICasesRespiratory Bronchiolitis
Imaging findings
High-resolution CT shows numerous, diffuse, upper-lung-predominant centrilobular ground-glass nodules without significant confluent consolidation or air trapping.
Key takeaways
Respiratory bronchiolitis (RB) associated with heavy smoking can present with florid, upper-lung-predominant centrilobular ground-glass nodules. Unlike hypersensitivity pneumonitis, RB typically occurs in active smokers and lacks features like diffuse mosaic attenuation or expiratory air trapping.
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