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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 ... result in decreased lung ... attenuation or ... - Emphysema - Lung ... pattern can be
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
in interstitial lung ... there are four patterns ... , high and low attenuation ... is interstitial lung ... The cystic pattern
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
pneumonitis are: Mosaic pattern ... and areas of low attenuation ... shows a mosaic pattern ... nodules of increased attenuation ... #Clinical #Radiology
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation ... pattern 1. ... emphysema: low attenuation ... #Clinical #Radiology ... LowAttenuation #Cystic #Pattern
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation ... pattern (2) 1. ... emphysema: low attenuation ... #Clinical #Radiology ... LowAttenuation #Cystic #Pattern
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation ... pattern 1. ... consolidation #Clinical ... HighAttenuation #Pattern
Personality Disorders - Differential Diagnosis Algorithm
• Enduring pattern of experience and behaviour that deviates from cultural
Differential Diagnosis Algorithm ... • Enduring pattern ... stable and of long ... • Histrionic - attention-seeking ... Differential #Diagnosis #Algorithm
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation ... pattern (2) 1. ... #Clinical #Radiology ... HighAttenuation #Pattern
Common Clinical Patterns of Weakness

#Weakness #Diagnosis #Differential #Algorithm #Patterns
Common Clinical ... Patterns of Weakness ... #Differential #Algorithm ... #Patterns
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
correlation in normal lung ... congestion, rheumatoid lung ... Notes: (A) Normal lung ... artifact); (G) UIP pattern ... #Clinical #Diagnosis