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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... histiocytosis) - Bronchiectasis ... #Diagnosis #Radiology ... #TractionBronchiectasis ... #SignetRing #RadiologyAssistant
The CXR demonstrates a reticular interstitial pattern with a preference at the lung bases.
The HRCT demonstrates
preference at the lung bases ... #Clinical #Radiology ... #Honeycombing # ... #TractionBronchiectasis ... #RadiologyAssistant
The case on the left shows subpleural honeycomb cysts in several contiguous layers.
There is also a
The case on the ... #Clinical #Radiology ... UsualInterstitialPneumonia #TractionBronchiectasis ... #Honeycombing # ... RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
When the cysts have ... histiocytosis or honeycombing ... seen and in many cases ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
On the left another case of UIP.
The lower zone predominance is demonstrated when you scroll through
#Clinical #Radiology ... UsualInterstitialPneumonia #TractionBronchiectasis ... #Bronchiectasis ... #Honeycombing # ... RadiologyAssistant
On the left two cases of NSIP.
Note the varying combination of GGO and fibrosis (traction bronchiectasis),
On the left two cases ... fibrosis (traction bronchiectasis ... but the lack of honeycombing ... #Clinical #Radiology ... NonspecificInterstitialPneumonia #ILD #RadiologyAssistant
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
In many cases you ... demonstrating honeycombing ... #Clinical #Radiology ... #Honeycombing # ... RadiologyAssistant
Ground-glass opacity is nonspecific, but highly significant finding since 60-80% of patients with ground-glass opacity on
20-40% of the cases ... In those cases there ... and honeycombing ... On the left two cases ... #Clinical #Radiology
On the left two cases with chronic consolidation. 
There are patchy non-segmental consolidations in a subpleural
On the left two cases ... fibrosis like honeycombing ... or traction bronchiectasis ... this #Clinical #Radiology ... OrganizingPneumonia #RadiologyAssistant
On the left a patient with GGO as dominant pattern.
In addition there is traction bronchiectasis indicating
there is traction bronchiectasis ... This case is one ... fibrosis with honeycombing ... #Clinical #Radiology ... GroundGlass #GGO #RadiologyAssistant