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On the left a chest film of a 19 year old patient with Langerhans cell histiocytosis.
The
is a reticular patern ... recognized that this pattern ... Emphysema however ... the central dot sign ... Radiology #CXR #CTChest
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
COVID-19 Patterns ... Lung Findings on Chest ... Reverse Halo Sign ... Halo Sign 6. ... ChestCT #radiology #CTChest
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... These include: - Emphysema ... low attenuation pattern ... Radiology #Pulmonary #CTChest ... TractionBronchiectasis #Cysts #Emphysema
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... Centrilobular emphysema ... Radiology #HRCT #CTChest ... LowAttenuation #Cystic #Pattern
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Atelectasis - Emphysema ... Reticular - Emphysema ... Diseases #Radiology #Patterns
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... Centrilobular emphysema ... Radiology #HRCT #CTChest ... LowAttenuation #Cystic #Pattern
Boerhaave Syndrome 
Postemesis 
Iatrogenic (most common)
Left Posterolateral most common

Mackler's Triad:
Lower Chest Pain
Vomiting
Subcutaneous Emphysema

#Boerhaave #Syndrome #Diagnosis #Signs
Triad: Lower Chest ... Subcutaneous Emphysema ... Syndrome #Diagnosis #Signs
Flow Volume Loops - Common Patterns
A. Normal
B. Emphysema
C. Unilateral Main Stem Bronchial Obstruction
D. Fixed Upper Airway
Loops - Common Patterns ... Emphysema C. ... FlowVolume #Loops #Patterns
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
: 'signet ring sign ... Centrilobular emphysema ... Diagnosis #Radiology #CTChest
Pulmonary Tuberculosis - Patterns of Involvement
 • Scarring, Nodules and Consolidation
    - Lobar
Tuberculosis - Patterns ... Loculated effusion or empyema ... Tuberculosis #TB #Patterns ... #chest #xray #clinical