Cavitary pneumonia

Cavitary Pneumonia is a disease in which the normal lung architecture is replaced by a cavity. In the healthy lung, oxygen transport occurs at the level of the alveoli which has an average size of 0.1 mm. These air spaces can become enlarged by a number of processes: bacterial infection (Tuberculosis), fungal infection, vasculitis (Wegener's granulomatosis), collagen vascular disease (Sjögren's syndrome) or granulomatous disease (Sarcoidosis).

Bacterial infections
Thin walled cavity Actinomyces Nocardia Klebsiella Staphylococcus aureus Anaerobic organism	Thick walled cavity Tuberculosis
Fungal infection
Histoplasmosis Coccidiomycosis