Fig. 2.

A. Chest CT scan one month later showed that progression of lung inflammation and bronchopleural fistula with increased amount of pleural effusion. Note the newly developed large bulging contour with irregular air density at right anterior chest wallindicates the empyema necessitatis formation. B. Chest CT scan three month after treatment initiation showed that decreased size of empyema, disappearance of bronchopleural fistula in right upper lobe and improved empyema necessitatis at right anterior chest wall. Chest tube was inserted into the right pleural space.