Dr. Gerald Diaz @GeraldMD
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Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief πŸ‡΅πŸ‡­ πŸ‡ΊπŸ‡Έ - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG: https://www.instagram.com/grepmed/ | Twitter: https://twitter.com/grepmeded/
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Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 β€’ Hypersensitivity pneumonitis, Farmer's lung, Bird
Pneumonias: β€’ ... pneumonia (NSIP ... ), Cryptogenic organizing ... pneumonia (COP) ... pneumonia (DIP)
On the left a patient with rheumatoid arthritis and bilateral peripheral consolidations as a result of
of organizing pneumonia ... Clinical #Radiology #CTChest ... #COP #Cryptogenic ... RheumatoidArthritis #ILD ... #RadiologyAssistant
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
Non specific interstitial ... Cryptogenic organizing ... pneumonia (COP) ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
idiopathic or cryptogenic ... of NSIP, UIP, OP ... Radiology #Pulmonary #CTChest ... #ILD #Findings ... #RadiologyAssistant
On the left a patient who complained of arthritic pain.

There are multiple small bilateral peripheral consolidations.
The
also organizing pneumonia ... Clinical #Radiology #CTChest ... #COP #Cryptogenic ... #Organizing #Pneumonia ... #ILD #RadiologyAssistant
HRCT findings in OP
- Bilateral peripheral consolidations, sharply demarcated.
- Consolidations may be migratory.
- Lesions may show
organizing pneumonia ... Clinical #Radiology #CTChest ... #COP #Cryptogenic ... #Organizing #Pneumonia ... #ILD #RadiologyAssistant
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
usually multiple ill-defined ... idiopathic it is called cryptogenic ... (COP). ... The old name is ... Differential #Table #RadiologyAssistant
Here are the most common examples of these four patterns on a chest x-ray (click image
patterns on a chest ... consolidation - Multifocal ill-defined ... opacities - Fine Nodular ... interstitial opacities ... Consolidation #Patterns #RadiologyAssistant
On the left two cases with chronic consolidation. 
There are patchy non-segmental consolidations in a subpleural
organizing pneumonia ... (COP). ... Clinical #Radiology #CTChest ... #COP #Cryptogenic ... OrganizingPneumonia #RadiologyAssistant
Differential diagnosis of the reversed halo sign (RHS). AIA, angioinvasive aspergillosis; AIS, adenocarcinoma in situ; COP,
adenocarcinoma in situ; COP ... , cryptogenic organising ... , non-specific interstitial ... pneumonia; OP, ... cavitary lesions, lobular