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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
basis of HRCT findings ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Differential #Diagram #Comparison ... Emphysema #SignetRing #RadiologyAssistant
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
pattern of pulmonary ... to confirm the diagnosis ... demonstrating honeycombing ... #Clinical #Radiology ... #RadiologyAssistant
Notice that there are multiple densities in both lungs.
The larger ones are ill-defined and maybe there
multiple ill-defined masses ... The lab-findings ... #Clinical #Radiology ... Organizing #Pneumonia #OrganizingPneumonia ... #BOOP #RadiologyAssistant
On the left two cases with chronic consolidation. 
There are patchy non-segmental consolidations in a subpleural
The final diagnosis ... pneumonia the HRCT findings ... fibrosis like honeycombing ... look like this #Clinical ... #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... histiocytosis or honeycombing ... #Diagnosis #Radiology ... #Pulmonary #CXR ... #Differential #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
UIP with honeycombing ... very similar HRCT findings ... #Clinical #Diagnosis ... #UIP #Comparison ... Fibrosis #Mimic #ILD #RadiologyAssistant
In the images on your left you can appreciate again the spectrum of findings seen in
the spectrum of findings ... Notice the lack of honeycombing ... as diagnosis. ... #Clinical #Radiology ... NonspecificInterstitialPneumonia #ILD #RadiologyAssistant