Sputum: Expectorated material usually consisting mostly of mucous or mucous mixed with pus. It is frequently produced in increased amounts in diseases of the airways, i.e.,chronic bronchitis or cystic fibrosis.


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Sputum: Material coughed up from the lungs and expectorated via the mouth. It contains Mucus, cellular debris, and microorganisms. It may also contain blood or pus.2

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  1. Source: RDCRN (NCATS/NIH): rarediseasesnetwork.org/ cms/ rld/ Learn-More/ Glossary
  2. Source: MeSH (U.S. National Library of Medicine)

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