Empyema

Empyema
Classification and external resources
ICD-10	J86.9
MedlinePlus	000123
MeSH	D004653
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An empyema (from Greek ἐμπύημα, "abscess") is a collection or gathering of pus within a naturally existing anatomical cavity. For example, pleural empyema is empyema of the pleural cavity. It must be differentiated from an abscess, which is a collection of pus in a newly formed cavity.

In human medicine, empyema occurs in:

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