chest Flashcards
1
Q
INTRAPULMONARY SHADOWING (DENSITIES)
A
Shadowing in the lungs is due to:
1. Alveolar disease
2. Interstitial disease
2
Q
The main features of alveolar shadowing
A
- In the early stages it may present as faint homogeneous haze
- Shadowing maybe homogeneous and patchy in appearance.
- Air bronchograms maybe visible
2
Q
Causes of alveolar shadowing
A
Transudate
Exudate
Haemorrhage
Infiltration
2
Q
Transudate
A
Alveoli become filled with transudate of low protein content and occurs in pulmonary oedema.
2
Q
Exudate
A
Alveoli become filled with fluid of high protein content.
Caused by Adult respiratory distress syndrome
2
Q
Haemorrhage
A
Alveoli filled with blood and this may occur in trauma
2
Q
Patterns of alveolar shadowing
A
- Lobar/Segmental pattern
Caused by: infection, pulmonary infarct, contusion, alveolar cell carcinoma - Bat’s wing pattern
Acute: pulmonary oedema
Chronic: Lymphoma/leukemia, pulmonary alveolar proteinosis, alveolar cell carcinoma
3
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