Commonest cause of lung abscess:
Lung Abscess Lung abscess refers to a microbial infection of the lung that results in necrosis of the pulmonary parenchyma MC cause of primary lung abscess: Anaerobic bacteria Etiology of anaerobic lung abscess: Aspiration
Aspiration
Hematogenous spread from distant site
Direct contact
Lymphatic spread
Thorax And Mediastinum