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Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
there are four patterns ... low attenuation (table ... The ground-glass ... The cystic pattern ... pattern can be
Pulmonary Hypertension Groups - WHO Classification
Group I - Vascular remodeling of pulmonary arteries
 • Idiopathic, HIV,
- WHO Classification ... hypoxemia • COPD, ILD ... IV - CTEPH • ... PH Functional Classification ... #WHO #Classification
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation pattern ... Non specific interstitial ... pneumonitis (NSIP): ground ... HighAttenuation #Pattern ... #Comparison #Table
Here are the most common examples of these four patterns on a chest x-ray (click image
of these four patterns ... consolidation - Multifocal ill-defined ... consolidations Interstitial ... - Reticular interstitial ... Consolidation #Patterns
Mayo UC Endoscopic Classification
 • Score = 0 (normal or inactive disease) - Normal vascular pattern
UC Endoscopic Classification ... Normal vascular pattern ... decreased vascular pattern ... absent vascular pattern ... UC #Endoscopic #Classification
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
a heterogenous group ... listed in the table ... have specific patterns ... realise, that these patterns ... IdiopathicInterstitialPneumonia #ILD
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Metastases - Interstitial ... Nodular - Acute Interstitial ... - Ground Glass ... Opacity - Chronic Interstitial ... Diseases #Radiology #Patterns
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation pattern ... peripheral areas of ground ... both areas of ground ... HighAttenuation #Pattern ... #Comparison #Table
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... bronchiolitis: ill ... centrilobular nodules of ground-glass ... CTChest #Nodular #Pattern ... Differential #Comparison #Table
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
Ground-glass opacity ... Ground-glass opacity ... Thickening of the interstitium ... the alveoli) or interstitial ... glass pattern can