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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
These include: - Emphysema ... on the basis of HRCT ... Diagnosis #Radiology #Pulmonary ... LowAttenuation #Differential ... #SignetRing #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
(centrilobular emphysema ... - Aspiration - Pulmonary ... #HRCT #ChestCT ... #Differential #Table ... #Upper #Lower #RadiologyAssistant
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
the overlap in differential ... Sometimes the term ... Diagnosis #Radiology #Pulmonary ... #HRCT #CTChest ... #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
arise within a mass ... without associated pulmonary ... emphysema. ... The term is mostly ... #Comparison #RadiologyAssistant
On the left a smoker with RB-ILD with subtle HRCT-findings.
The dominant pattern is ground glass opacification.
Additional
RB-ILD with subtle HRCT-findings ... are paraseptal emphysema ... there is a broad differential ... interpretion of the HRCT ... RespiratoryBronchiolitis #ILD #RadiologyAssistant
The table on the left is the overall table for mediastinal masses.
In the next paragraphs we
Neurogenic tumors - Germ ... masses #Diagnosis #Pulmonary ... #Mediastinal #Mass ... #Differential # ... Middle #Posterior #RadiologyAssistant