biomarker
Description
Any cellular, molecular, chemical or physical change that can be measured and used to study a normal or abnormal process in the body. Biomarkers are used to check the risk for, presence of or progress of a disease or the effects of treatment.
For example, prostate-specific antigen (PSA) can be used as a biomarker for prostate cancer or blood sugar levels can be used to monitor diabetes.
Also called biological marker (a molecular biomarker may be called molecular marker or signature molecule).
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