10 results
Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
organizing pneumonia (COP ... ), chronic eosinophilic ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #Table
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
perilymphatic distribution ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table ... #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
bronchiolitis (RB-ILD ... Pulmonary edema #Diagnosis ... #HRCT #ChestCT ... #Differential #Table ... #Distribution #
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
perilymphatic distribution ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... Differential #Comparison #Table ... #RadiologyAssistant
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
CXR: Peripheral distribution ... irregular lines, nodular ... , cavities • HRCT ... organizing pneumonia, Chronic ... BOOP #pulmonary #ILD
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
The table summarizes ... the pattern of distribution ... called cryptogenic (COP ... #Diagnosis #Radiology ... #RadiologyAssistant
Notice that there are multiple densities in both lungs.
The larger ones are ill-defined and maybe there
month history of chronic ... of chronic consolidation ... organizing pneumonia (OP ... #Clinical #Radiology ... OrganizingPneumonia #BOOP #RadiologyAssistant
On the left two cases with chronic consolidation. 
There are patchy non-segmental consolidations in a subpleural
two cases with chronic ... and peripheral distribution ... The final diagnosis ... pneumonia the HRCT ... OrganizingPneumonia #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
) Differential diagnosis ... show very similar HRCT ... strong lower zone distribution ... #Radiology #CTChest ... #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
listed in the table ... morphologic findings on HRCT ... #Diagnosis #Radiology ... IdiopathicInterstitialPneumonia #ILD ... #Findings #RadiologyAssistant