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Chest Pain - Differential Diagnosis Framework

Cardiovascular Causes of Chest Pain:
 • Myocardium:
	- Myocarditis
	- CAD/ACS
	- Valvulopathy
	- Myopericarditis
Diagnosis Framework ... - Tamponade Pulmonary ... Pleuritis • Alveoli ... : - CHF - Pneumonia ... #Differential #Diagnosis
Non-Resolving Pneumonias: Etiologies
Unusual Infections:
 - Immunocompromised patients (e.g.: Mycobacterium, Aspergillosis, Nocardia)
 - Endemic Fungi (e.g.: Histoplasmosis,
Etiologies Unusual Infections ... - Alveolar proteinosis ... Others: - Pulmonary ... infarction/PE, CHF ... NonResolving #Pneumonia #diagnosis
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
- Differential Diagnosis ... Interstitial Edema, Alveolar ... Crazy Paving: Alveolar ... #Differential #Diagnosis ... #pulmonary #radiology
Causes of Chronic Dyspnea - Differential Diagnosis Algorithm
Pericardial
 • Effusion
 • Cardiac Tamponade*
 • Constriction
Myocardial
 •
- Differential Diagnosis ... Thickening/Masses Chest ... Alveoli • Pneumonia ... Interstitium • ILD • CHF ... #Differential #Diagnosis
Notice that even within each lobe there is a gravity dependent difference in density.
This is only
even within each lobe ... exsudate due to infection ... Clinical #Radiology #CTChest ... #CHF #Alveolar ... #Pulmonary #Edema
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Age-Adjusted Gradient • Alveolar ... Weakness, Loss of Chest ... Left Shunt - Anatomic ... #AA #Gradient #alveolar ... #differential #diagnosis
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
Definition: Diffuse alveolar ... Differential Diagnosis ... allopurinol), Infection ... high resolution chest ... DAH, rule out infection
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
reach the terminal alveoli ... taken up by the alveolar ... Progression: • Upper lobe ... Tuberculosis Diagnosis ... Tuberculosis #TB #Diagnosis
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
reach the terminal alveoli ... taken up by the alveolar ... Progression: • Upper lobe ... Tuberculosis Diagnosis ... Tuberculosis #TB #Diagnosis
Pulmonary Renal Syndromes - OnePager Summary
Autoimmune ANCA vasculitis (AAV): GPA (granulomatous with polyangiitis), EGPA (eosinophilic granulomatosis
Other tests: • CT chest ... confirm DAH, r/o infection ... leading to diffuse alveolar ... typically seen on chest ... #differential #diagnosis