How to distinguish between chronic eosinophilic pneumonia and COP on imaging

How to distinguish between chronic eosinophilic pneumonia and COP on imaging?

Chronic eosinophilic pneumonia and COP share some similar imaging features. Both are characterized by consolidations which can wax and wane. COP tends to be more peribronchovascular in distribution and is more often associated with nodules and a lower lobe predominance. In contradistinction, chronic eosinophilic pneumonia is classically confined to the subpleural region with an upper lung zone predominance

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