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Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
and cardiogenic pulmonary ... (COP), chronic ... eosinophilic pneumonia ... #HRCT #ChestCT ... Central #Peripheral #RadiologyAssistant
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
• Pleuritic chest ... Lymphadenopathy, Chest ... : • Chest pain ... Abdominal pain, chronic ... Infections #HIV #AIDS #pulmonary
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 ... Organizing Pneumonia ... Patterns #Lung #Pulmonary ... #ChestCT #radiology
Causes of Chronic Dyspnea - Differential Diagnosis Algorithm
Pericardial
 • Effusion
 • Cardiac Tamponade*
 • Constriction
Myocardial
 •
Causes of Chronic ... Dyspnea - Differential ... Thickening/Masses Chest ... Alveoli • Pneumonia ... #Dyspnea #SOB #
Eosinophilic Pneumonia
When to suspect Eosinophilic Pneumonia? Non-resolving pneumonia + BAL > 25% eosinophils + excluded more
Fever+, Cough+, Dyspnea ... +, Pleuritic Chest ... mechanical ventilation Chronic ... Consolidations AKA "inverse pulmonary ... #diagnosis #pulmonary
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Radiographic Features of Pulmonary ... Diseases - Pneumonia ... Glass Opacity - Chronic ... Emphysema - Pulmonary ... Lung #CXR #XRay #ChestCT
Venn Diagram - Does this patient have pneumonia?
Diagnosis is generally based on three lines of evidence:
this patient have pneumonia ... evidence of a chest ... e.g., CXR, CT, ultrasound ... symptoms (e.g., dyspnea ... #Pneumonia #Venn
Lobar pneumonia
On the chest x-ray there is an ill-defined area of increased density in the right
Lobar pneumonia ... On the chest x-ray ... list of causes of chronic ... an acute lobar pneumonia ... #RadiologyAssistant
Causes of Dyspnea - Differential Diagnosis Algorithm
Cardiac:
 • Dysrhythmia
 • Ischemia
 • Cardiomyopathy
 • Valvular disease
Causes of Dyspnea ... Bronchitis • Chronic ... Parenchyma: • Pneumonia ... • Pulmonary edema ... amzn.to/2LmUODZ #Dyspnea
Acute and Chronic Causes of Dyspnea - Differential Diagnosis
Pulmonary/Chest Wall:
 • Acute: Trauma, COPD exacerbation, Asthma
Causes of Dyspnea ... Differential Diagnosis Pulmonary ... /Chest Wall: • ... Pleural effusion, Pneumonia ... Pleural effusion, Pulmonary