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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
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These include: - Emphysema ... Honeycombing Most diseases ... #Diagnosis #Radiology ... #Differential #Diagram ... #SignetRing #RadiologyAssistant
Pleural fluid
It takes about 200-300 ml of fluid before it comes visible on an CXR (figure).
About
#Diagnosis #Radiology ... Pulmonary #CXR #PleuralEffusion ... #Pleural #Effusion ... Hidden #Volume #Diagram ... #RadiologyAssistant
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
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Features of Pulmonary Diseases ... Atelectasis - Emphysema ... Pneumothorax - Effusion ... Reticular - Emphysema ... #Differential #Diagnosis
Radiographic appearances of pulmonary diseases in HIV/AIDS Patients
 • Diffuse Interstitial Infiltrates: Pneumocystis jirovecii, M.tuberculosis, Histoplasma
• Pleural effusion ... Parapneumonic effusion ... ; empyema, M.tuberculosis ... (NHL, primary effusion ... #differential #diagnosis
Pleural effusion is seen in:
1. Pulmonary edema
2. Lymphangitic spread of carcinoma - often unilateral
3. Tuberculosis
4. Lymphangiomyomatosis
Pleural effusion ... Asbestosis #Diagnosis ... Pulmonary #Pleural #Effusion ... #PleuralEffusion ... #Differential #RadiologyAssistant
Summary table of heart murmurs associated with mitral and aortic valve diseases as well as their
and aortic valve diseases ... well as their signs ... for more medical diagrams ... #diagnosis #heart
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Smoking related diseases ... (centrilobular emphysema ... Pulmonary edema #Diagnosis ... #Upper #Lower #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... : 'signet ring sign ... Centrilobular emphysema ... LIP #Clinical #Diagnosis ... Comparison #Table #RadiologyAssistant
Causes of Dyspnea - Differential Diagnosis Algorithm
Cardiac:
 • Dysrhythmia
 • Ischemia
 • Cardiomyopathy
 • Valvular disease
- Differential Diagnosis ... Atelectasis • Emphysema ... Interstitial lung disease ... Pleura: • Pleural effusion ... #Differential #Diagnosis
Split Pleura Sign on Chest CT
 • Contrast enhancement of the parietal and visceral pleura, separated
Split Pleura Sign ... • DDx: Empyema ... , malignant effusions ... Split #Pleura #Sign ... Lung #Pulmonary #diagnosis