Lung Abscess Dr Sheetu Singh Assistant professor Department of Chest & tuberculosis

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Lung Abscess

• Dr Sheetu Singh
• Assistant professor
• Department of Chest tuberculosis
• SMS Medical College, Jaipur

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Anatomic Alterations of the Lungs

• Alveolar consolidation
• Alveolar-capillary and bronchial wall destruction
• Tissue necrosis
• Cavity formation
• Fibrosis and calcification of the lung parenchyma
• Bronchopleural fistulae
• Atelectasis
• Excessive airway secretions and empyema

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Etiology

• Pneumonia caused by aspiration (most common)
• Klebsiella
• Staphylococcus
• Predisposing factors for aspiration
• Alcohol abuse
• Seizure disorders
• General anesthesia
• Head trauma
• Cerebrovascular accident
• Swallowing disorders

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Etiology

• (Less frequent causes)
• Aerobic organisms
• Streptococcus pyogenes
• Klebsiella pneumoniae
• Escherichia coli
• On rare occasions
• Streptococcus pneumoniae
• Pseudomonas aeruginosa
• Legionella pneumophila

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Etiology

• (Other organisms that may lead to a lung abscess)
• Mycobacterium tuberculosis
• Fungal organisms
• Histoplasma capsulatum
• Coccidioides immitis
• Blastomyces
• Aspergillus fumigatus
• Parasites
• Paragonimus westermani
• Echinococcus
• Entamoeba histolytica

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Etiology

• Lung abscess may also develop from
• Bronchial obstruction
• Vascular obstruction
• Interstitial lung disease
• Bullae or cysts
• Penetrating chest wounds
• Bronchogenic carcinoma
• Congenital cysts