Cryptogenic organizing pneumonia
From Radipedia
aka BOOP
- Idiopathic inflammation of the bronchioles and surrounding tissue causing granulation tissue and "non-infectious pneumonia"
- Patchy peripheral subpleural or peribronchovascular consolidation
- Atoll sign or reverse CT halo
- Responds to steroids not antibiotics
- a/w many systemic diseases (lupus, c-anca, GVHD, etc)
- No pleural effusion or lymphadenopathy
Differential
- Pulmonary infarct
- Eosinophillic pneumonia
