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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Lung cysts (LAM ... on the basis of HRCT ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... low attenuation (table ... histiocytosis or honeycombing ... #Diagnosis #Radiology ... #RadiologyAssistant
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
, bulla, honeycombing ... visible wall #CXR ... #Lucency #Differential ... #Table #CavitaryLesion ... #Diagnosis #Radiology
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
On a chest X-ray ... to confirm the diagnosis ... #Clinical #Radiology ... #Interstitial # ... #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
or an area of consolidation ... diagnosis there ... the surrounding lung ... #Radiology #CTChest ... #RadiologyAssistant
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Lymphangitic Carcinoma, Interstitial ... Hemorrhage, Edema • Consolidation ... Attenuation: • Emphysema ... Antitripsyn Def • Cysts ... #radiology
Lung abnormalities mostly present as areas of increased density, which can be divided into the following
following patterns: Consolidation ... are seen as in emphysema ... #Diagnosis #Pathophys ... #Radiology #CXR ... #RadiologyAssistant
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
Thickening of the lung ... diagnosis (Table ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
UIP with honeycombing ... chronic HP (right) Differential ... centrilobular emphysema ... show very similar HRCT ... #Radiology #CTChest