9 results
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
specific interstitial pneumonitis ... bronchiectasis, no honeycombing ... result of massive fibrosis ... Clinical #Radiology #HRCT ... #Comparison #Table
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
fibrosis. ... on the CXR. ... A HRCT is needed ... attributed to chronic ... HRCT demonstrated
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
are: Mosaic pattern ... Fibrosis and parenchymal ... The HRCT shows a ... mosaic pattern ... Clinical #Radiology #CXR
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
Chronic eosinophilic ... pneumonia with ... end-stage with massive fibrosis ... Clinical #Radiology #HRCT ... #Comparison #Table
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
UIP with honeycombing ... Hypersensitivity Pneumonitis ... similar HRCT findings ... In chronic HP fibrotic ... #Comparison #Chronic
Honeycombing represents the second reticular pattern recognizable on HRCT.
Because of the cystic appearance, honeycombing is also
second reticular pattern ... recognizable on HRCT ... composed of dense fibrous ... usual interstitial pneumonia ... (UIP).
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
idiopathic interstitial pneumonias ... combinations of fibrosis ... have specific patterns ... morphologic findings on HRCT ... findings of NSIP, UIP
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
other interstitial pneumonias ... - Imaging: • CXR ... , cavities • HRCT ... Idiopathic interstitial pneumonia ... , Chronic eosinophilia
Acute interstitial pneumonia (AIP, earlier named Hamman Rich Pneumonitis) is a rare idiopathic lung disease characterized
Acute interstitial pneumonia ... Hamman Rich Pneumonitis ... The histologic pattern ... aswell as the HRCT ... The HRCT characteristics