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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Especificidad

Specificity
When referring to a medical test, specificity refers to the percentage of people who test negative for a specific disease among a group of people who do not have the disease. No test is 100% specific because some people who do not have the disease will test positive for it (false positive).



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