<unk>  is necrosis of the pulmonary tissue and formation of cavities (more than 2 cm) containing necrotic debris or fluid caused by microbial infection. This pus-filled cavity is often caused by aspiration, which may occur during altered consciousness. Alcoholism is the most common condition predisposing to<unk> es.<unk>  is considered primary (60%) when it results from existing<unk>  parenchymal process and is termed secondary when it is complicated by another process e.g. vascular emboli or follows rupture of extrapulmonary<unk>  into the<unk> .
Lung abscess
Pleurisy
Mediastinitis
Round pneumonia
Hydrothorax
Atypical pneumonia
Cavitary pneumonia
Bronchitis