Dr. Gerald Diaz @GeraldMD
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Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief πŸ‡΅πŸ‡­ πŸ‡ΊπŸ‡Έ - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG: https://www.instagram.com/grepmed/ | Twitter: https://twitter.com/grepmeded/
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Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
four patterns: ... low attenuation (table ... common pattern ... pattern on a CXR ... #Differential #RadiologyAssistant
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
is a histologic pattern ... pattern particularly ... a reticular pattern ... This pattern was ... #Interstitial #Pattern
The CXR demonstrates a reticular interstitial pattern with a preference at the lung bases.
The HRCT demonstrates
pattern with a ... preference at the lung bases ... The HRCT demonstrates ... #Interstitial #Pattern ... TractionBronchiectasis #RadiologyAssistant
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Clinical #Radiology #HRCT ... CTChest #Nodular #Pattern ... #Comparison #Table ... #RadiologyAssistant
Here are the most common examples of these four patterns on a chest x-ray (click image
of these four patterns ... Interstitial - Reticular ... Clinical #Radiology #CXR ... Consolidation #Patterns ... #RadiologyAssistant
Cystic versus Reticular
It can be difficult to determine whether we are dealing with a reticular pattern
pattern or a cystic ... pattern. ... pattern. ... a HRCT will give ... LangerhansCellHistiocytosis #LCH #RadiologyAssistant
Reticular pattern 
1. Lymphangitic carcinomatosis: irregular septal thickening, usually focal or unilateral 50% adenopathy', known carcinoma.
2.
Reticular pattern ... incidental finding in HRCT ... #CTChest #Reticular ... #Pattern #Comparison ... #Table #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
indicates unknown cause ... listed in the table ... have specific patterns ... morphologic findings on HRCT ... realise, that these patterns
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
interpretation of HRCT ... the dominant HR-pattern ... : reticular nodular ... Interpretation #Algorithm ... #ILD #RadiologyAssistant
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
to look at the pattern ... more than one pattern ... lobar pneumonia caused ... Radiology #Pulmonary #CXR ... #RadiologyAssistant