13 results
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... Negative Abscess ... antibiotics as a cause ... Dracunculiasis - Non-Infectious ... #Abscess #Differential
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
Important Fungal ... • India ink - "Negative ... #microbiology #microscopy ... #fungus #comparison ... #table
Causes of Hemoptysis - Differential Diagnosis Algorithm
Massive Hemoptysis (>I00 mL in 24 hours)
 • Malignancy
 •
Causes of Hemoptysis ... Bronchiectasis • Abscess ... Vasculitis Infection ... Tuberculosis • Fungal ... Diagnosis #Algorithm #Causes
CAVITY – a useful mnemonic for the causes of a cavitating lung mass.

C = cancer
mnemonic for the causes ... vascular - pulmonary ... embolus I = infection ... - pulmonary abscess ... (TB, fungal, staph
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
polymicrobial infection ... • Most common cause ... Prevotella • Fungal ... #pulmonary #differential ... #causes #management
Lung Nodule - Differential Diagnosis Algorithm
Nodule on > 2 Years Without a Change in Size:
 •
Granuloma • Abscess ... Breast, Testicle) Infection ... : • Fungal • ... Diagnosis #Algorithm #Causes ... #Pulmonary
Differentiating NBTE from Infective Endocarditis
No pathognomonic signs/symptoms or echo features that are specific to NBTE, and
in up to 30% of cases ... common, Aortic root abscess ... large infarct - Infectious ... #Endocarditis #comparison ... Marantic #diagnosis #table
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Infectious: • Pre-existing ... Hypercoagulable (APLAS) Microbiology ... • Coagulase-negative ... Cerebral > Splenic, pulmonary ... Septic Emboli Cause
Hemoptysis - Differential Diagnosis Framework
Massive Hemoptysis: >150-300 mL in 24h
Airway disease: 
 • Bronchitis, Bronchiectasis, Malignancy
Parenchyma: • Infection ... Necrotizing PNA, Abscess ... Ebola, Dengue), Fungal ... Differential #Diagnosis #pulmonary ... #causes
Approach to Eosinophilic Lung Diseases
 • Acute Eosinophilic Pneumonia (< 1 wk) - ~30yo, M; Recent
, CNS, skin • Infectious ... (Variable) - Fungal ... Lung #Diseases #pulmonary ... differential #diagnosis #comparison ... #table #eosinophilia