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Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
and UIP. ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #Table ... #Peripheral #RadiologyAssistant
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
Chronic eosinophilic pneumonia ... consolidation #Clinical ... #Radiology #HRCT ... Pattern #Comparison #Table ... #RadiologyAssistant
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
Cryptogenic organizing pneumonia ... #Clinical #Radiology ... #HRCT #CTChest ... Pattern #Comparison #Table ... #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
idiopathic interstitial pneumonias ... listed in the table ... morphologic findings on HRCT ... #Diagnosis #Radiology ... ILD #Findings #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
emphysema: no walls, central ... dot. - LIP #Clinical ... #Diagnosis #Radiology ... Differential #Comparison #Table ... #RadiologyAssistant
Acute interstitial pneumonia (AIP, earlier named Hamman Rich Pneumonitis) is a rare idiopathic lung disease characterized
Acute interstitial pneumonia ... aswell as the HRCT ... The HRCT characteristics ... #Clinical #Radiology ... AcuteInterstitialPneumonia #ILD #RadiologyAssistant
Honeycombing represents the second reticular pattern recognizable on HRCT.
Because of the cystic appearance, honeycombing is also
recognizable on HRCT ... usual interstitial pneumonia ... (UIP). ... #Clinical #Radiology ... UsualInterstitialPneumonia #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
show very similar HRCT ... periphery towards the centrum ... #Clinical #Diagnosis ... #Radiology #CTChest ... Fibrosis #Mimic #ILD #RadiologyAssistant
On a normal lateral chest film the silhouette of the left diaphragm 2- can be seen
One should be able ... all the way to anterior ... #Clinical #Radiology ... #CXR #Pneumonia ... SilhouetteSign #RadiologyAssistant