Cryptogenic organising pneumonia

Case contributed by Dr Yi-Jin Kuok


Consolidation not responding to multiple courses of antibiotics.

Patient Data

Age: 35 years
Gender: Female

There are areas of clearing consolidation with central ground glass, also known as the reverse halo sign. Instead of ground glass surrounding an opacity/nodule ("halo sign"), there is an opacity/consolidation with a central ground glass density ("reverse halo").

There is the so called "atoll sign". As the consolidation clears away from the peripheries, the resultant curvilinear band of atelectasis is akin to an atoll.

Case Discussion

Features are, in the correct clinical setting, consistent with cryptogenic organising pneumonia (COP)

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Case information

rID: 14111
Published: 28th Jun 2011
Last edited: 16th Jul 2018
System: Chest
Inclusion in quiz mode: Included

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