​Symptoms and Signs – Differential Diagnosis of Cavitary Lesion on Chest Radiograph

​Symptoms and Signs – Differential Diagnosis of Cavitary Lesion on Chest Radiograph
NECROTIZING INFECTIONS
• Bacteria: anaerobes, Staphylococcus aureus, enteric gram-negative
bacteria, Pseudomonas aeruginosa, Legionella species, Haemophilus
influenzae, Streptococcus pyogenes, Streptococcus pneumoniae,
Rhodococcus, Actinomyces
• Mycobacteria: Mycobacterium tuberculosis, Mycobacterium kansasii,
Mycobacterium avium-intracellulare (MAI)
• Bacteria-like: Nocardia species
• Fungi: Coccidioides immitis, Histoplasma capsulatum, Blastomyces
hominis, Aspergillus species, Mucor species
• Parasitic: Entamoeba histolytica, Echinococcus, Paragonimus
westermani

CAVITARY INFARCTION
• Bland infarction (with or without superimposed infection)
• Lung contusion

SEPTIC EMBOLISM
• S. aureus, anaerobes, others

VASCULITIS
• Wegener’s granulomatosis, periarteritis
NEOPLASMS
• Bronchogenic carcinoma, metastatic carcinoma, lymphoma

MISCELLANEOUS LESIONS
• Cysts, blebs, bullae, or pneumatocele with or without fluid
collections
• Sequestration
• Empyema with air-fluid level
• Bronchiectasis