<unk><unk>  is defined as an infection of<unk>  resulting in necrosis of<unk>  parenchyma. It can be classified into three categories based on the duration of symptoms, etiology, and mode of spread as acute or chronic, primary or secondary and bronchogenic or hematogenic.
Lung abscess classification
Hemoptysis classification
Pleural empyema classification
Pleural effusion classification
Lung mass diagnosis
Lung abscess laboratory findings
Hemothorax classification
Farmer's lung differential diagnosis