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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
cysts (LAM, LIP ... Diagnosis #Radiology #Pulmonary ... #CTChest #LowAttenuation ... #Differential # ... Emphysema #SignetRing #RadiologyAssistant
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
attached to the chest ... There is a lung ... LAM is a rare lung ... airways leading to pulmonary ... #RadiologyAssistant
Tree-in-bud
In centrilobular nodules the recognition of 'tree-in-bud' is of value for narrowing the differential diagnosis.
Tree-in-bud describes
narrowing the differential ... identified in the lung ... Pathophys #Radiology #Pulmonary ... #CTChest #TreeInBud ... #Diagram #RadiologyAssistant
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
Perilymphatic nodules are ... the overlap in differential ... Diagnosis #Radiology #Pulmonary ... #HRCT #CTChest ... #RadiologyAssistant
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
between acute consolidation ... - Lung neoplasms ... Diagnosis #Radiology #Pulmonary ... Consolidation #Acute ... #RadiologyAssistant
Causes of Interstitial Lung Disease - Differential Diagnosis Algorithm
Idiopathic Interstitial Pneumonia
 • (UIP) Usual Interstitial Pneumonia
Disease - Differential ... Primary - Other (Rare ... Lymphangioleiomyomatosis (LAM ... ), • Pulmonary ... , Beomycin • Acute
Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
UIP, NSIP and long ... Diagnosis #Radiology #Pulmonary ... #CTChest #Consolidation ... #Differential # ... RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... in interstitial lung ... is interstitial lung ... Diagnosis #Radiology #Pulmonary ... #RadiologyAssistant
On the left a case with multiple cysts that are evenly distributed througout the lung (
througout the lung ... Lymphangiomyomatosis (LAM ... Clinical #Radiology #CTChest ... #LAM #Lymphangiomyomatosis ... #Pneumothorax #RadiologyAssistant
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
These are often ... Diagnosis #Radiology #Pulmonary ... #HRCT #CTChest ... MultipleNodules #Nodules #Differential ... #Algorithm #RadiologyAssistant