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Here are the most common examples of these four patterns on a chest x-ray (click image
of these four patterns ... Interstitial - ... Reticular interstitial ... Nodule - Multiple Masses ... #Patterns #RadiologyAssistant
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 cystic pattern ... pattern can be ... seen and in many cases
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation pattern ... Non specific interstitial ... Sarcoidosis end-stage: consolidation ... HighAttenuation #Pattern ... #Comparison #Table
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
diagnosis The table ... to look at the pattern ... more than one pattern ... lobar pneumonia caused ... #Differential #Table
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
The idiopathic interstitial ... indicates unknown cause ... listed in the table ... have specific patterns ... realise, that these patterns
Sarcoidosis
On a CXR sarcoidosis usually first presents with hilar and mediastinal lymphadenopathy (example).
Parenchymal disease can present
can present as consolidation ... or even as masses ... they may resemble consolidation ... NodularInterstitial #Nodular #Interstitial ... #Pattern #Sarcoidosis
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
BOOP • Type of interstitial ... Unknown • 6-7 cases ... opacities, Unilateral consolidation ... and GG pattern, ... • HRCT: patchy consolidation
Key findings in alveolar proteinosis
- Crazy paving pattern: reticular pattern superimposed on ground glass opacification.
- Opacifications
- Crazy paving pattern ... : reticular pattern ... ground glass to consolidation ... This is caused by ... transported to the interstitium
Clinical Classification of Pulmonary Hypertension

1. Pulmonary arterial hypertension from pulmonary vasculopathy
Idiopathic pulmonary arterial hypertension
Heritable gene mutations
Clinical Classification ... pulmonary disease Interstitial ... and obstructive pattern ... Hypertension #PHTN #Classification ... #Differential #Causes
Acute interstitial pneumonia (AIP, earlier named Hamman Rich Pneumonitis) is a rare idiopathic lung disease characterized
Acute interstitial ... outcome in many cases ... The histologic pattern ... diffuse or patchy consolidation ... There are areas of consolidation