The collection of pus in a cavity in the body, especially in the pleural cavity.
- These complications include pleural infection or empyema, meningitis, purulent pericarditis, or endocarditis.
- An empyema or complicated pleural effusion can be identified only by examination of the pleural fluid.
- Thoracic empyema is defined as an infection of the pleural space associated with the formation of thick, purulent, pleural fluid.
Late Middle English: via late Latin from Greek empuēma, from empuein 'suppurate', from em- 'in' + puon 'pus'.
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