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Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
Peripheral distribution ... in cryptogenic organizing ... pneumonia (COP) ... #Diagnosis #Radiology ... #RadiologyAssistant
On the left a patient with rheumatoid arthritis and bilateral peripheral consolidations as a result of
and bilateral peripheral ... as a result of organizing ... pneumonia. ... #Clinical #Radiology ... #ILD #RadiologyAssistant
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
Cryptogenic Organizing ... Cryptogenic Organizing ... : • CXR: Peripheral ... Pneumonia - Diagnosis ... pulmonary #ILD #diagnosis
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
Differential diagnosis ... perihilar (batwing) or peripheral ... OP is organizing ... #Diagnosis #Radiology ... Differential #Table #RadiologyAssistant
On the left a patient who complained of arthritic pain.

There are multiple small bilateral peripheral consolidations.
The
small bilateral peripheral ... pneumonia, but ... #Clinical #Radiology ... #Pneumonia #ILD ... #RadiologyAssistant
Notice that there are multiple densities in both lungs.
The larger ones are ill-defined and maybe there
There is a peripheral ... of organizing pneumonia ... #Clinical #Radiology ... #CXR #Peripheral ... #BOOP #RadiologyAssistant
HRCT findings in OP
- Bilateral peripheral consolidations, sharply demarcated.
- Consolidations may be migratory.
- Lesions may show
OP - Bilateral peripheral ... carcinoma, the diagnosis ... #Clinical #Radiology ... #Pneumonia #ILD ... #RadiologyAssistant
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
the differential diagnosis ... diseases like organizing ... with multiple peripheral ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
Cryptogenic organizing ... pneumonia (COP) ... #Clinical #Radiology ... Comparison #Table #RadiologyAssistant
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
Bilateral Peripheral ... Organizing Pneumonia ... Pulmonary #ChestCT #radiology ... #CTChest #diagnosis