25 results
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Lung cysts (LAM, LIP ... can be readily ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Differential #Diagram #Comparison
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
woman of child-bearing ... Centrilobular emphysema ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Centrilobular emphysema ... woman of child-bearing ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
Ground-glass opacity (GGO ... HRCT as seen in fibrosis ... in ground glass pattern ... predominance: UIP ... #Pulmonary #CTChest
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Centrilobular emphysema ... central dot. - LIP ... #Clinical #Diagnosis ... #Radiology #CTChest ... #Differential #Comparison
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation pattern ... result of massive fibrosis ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
end-stage with massive fibrosis ... consolidation #Clinical ... #Radiology #HRCT ... #CTChest #HighAttenuation ... #Pattern #Comparison
On the left a patient with GGO as dominant pattern.
In addition there is traction bronchiectasis indicating
a patient with GGO ... As in UIP (usual ... #Clinical #Radiology ... #CTChest #NSIP ... #GroundGlass #GGO
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
centrilobular emphysema ... In chronic HP fibrotic ... #Clinical #Diagnosis ... #Radiology #CTChest ... #UIP #Comparison
Pulmonary Tuberculosis - Patterns of Involvement
 • Scarring, Nodules and Consolidation
    - Lobar
Tuberculosis - Patterns ... consolidation - Fibrosis ... Loculated effusion or empyema ... #chest #xray #clinical ... #radiology #CXR