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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Flema

Phlegm (flem)
A more than normal amount of thick mucus made by the cells lining the upper airways and lungs. A buildup of phlegm may be caused by infection, irritation, or chronic lung disease, and can cause discomfort in the chest and coughing.



 
 
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.