29 results
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
19 Patterns of Lung ... Findings on Chest ... CT 1. ... ARDS 3. ... COVID19 #Patterns #Lung
Chronic Cough - Differential Diagnosis Algorithm
Red Flags:
 • Fever, night sweats, chills (infection)
 • Weight loss,
Dyspnea (underlying lung ... disease or CHF) ... lymadenopathy, clubbing, chest ... refer + order CT ... disease #Chronic
Acute Respiratory Distress Syndrome – ARDS: Clinical Cheat Sheet

An acute diffuse, inflammatory lung injury, leading to
: Clinical Cheat ... , inflammatory lung ... permeability, lung ... with decreased lung ... be detected on CT
IgG4-Related Disease
Clinical history:  Man, 60 years, multiorgan involvement, unique or multiple inflammatory pseudotumor
4 phenotypes:
 •
IgG4-Related Disease ... head and neck, pancreas ... biliary, renal, lung ... concentration PET-CT ... IgG4 #Related #Disease
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
• Periodontal disease ... : Pleuritic chest ... level seen • Chest ... CT Lung Abscess ... treatment until the chest
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Diagnosis Framework Disease ... angioinvasive disease ... • CT: Halo sign ... Infections #HIV #AIDS ... differential #diagnosis #infectiousdiseases
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Weakness, Loss of Chest ... Elasticity (flail chest ... : Atelectasis, ARDS ... Embolism, Obstructive Lung ... , Interstitial Lung
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) 
- Respiratory symptoms must have begun within one
Distress Syndrome (ARDS ... be present on a chest ... computed tomographic (CT ... lobar collapse, lung ... >= 5cm H2O #ARDS
AIDS-defining illnesses
 - Candidiasis of the esophagus, bronchi, trachea, or lungs [(but NOT the mouth (thrush)]
AIDS-defining illnesses ... bronchi, trachea, or lungs ... Cytomegalovirus disease ... syndrome due to HIV #AIDS ... Illnesses #HIV #InfectiousDiseases
Nontuberculous Mycobacteria (NTM) Infections 

Mycobacterial species other than those belonging to the Mycobacterium tuberculosis complex and
infections Lungs ... to NTM: Chronic lung ... • Dyspnea, • Chest ... Imaging, high res CT ... differential #diagnosis #infectiousdiseases