Accumulation of purulent exudate in the pleural cavity.

an accumulation of pus within a cavity, especially the chest cavity.

a collection of pus in a body cavity (especially in the lung cavity)

a collection of pus within a natural body cavity, most commonly the pleura l space surrounding the lung s

an infection of the inside of the chest cavity, often due to severe pneumonia or previous surgery

a purulent infection which, in most cases, is confined to the pleural space, although it can develop as a complication of, or serve as a cause of a lung abscess

The presence of pus in the pleural space which is between the outer surface of the lung and the chest wall. Empyema is often a complication of pneumonia caused by bacteria such as Streptococcus pneumonia, Staphylococcus aureus, or Haemophilus influenza (H. flu) type b. See the entire definition of Empyema

Pus located in a body cavity.

An empyema is a collection of pus within a natural body cavity, most commonly the pleural space surrounding the lungs. It is usually caused by a bacterial infection of the lungs (pneumonia).