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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 - ... Nodule or mass ... - 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 ... : reticular, nodular ... low attenuation (table ... 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
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 ... #Interstitial # ... Pattern #Sarcoidosis
The distribution of nodules shown on HRCT is the most important factor in making an accurate
pattern. ... In most cases small ... peribronchovascular interstitium ... #Pattern #Distribution ... Perilymphatic #Comparison
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
Unknown • 6-7 cases ... opacities, Unilateral consolidation ... and GG pattern, ... irregular lines, nodular ... • 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