A biomarker refers to any molecule that can be quantified in tissues, blood, or other bodily fluids. Its detection may indicate an abnormal physiological process, condition, or disease. Alternatively known as a molecular marker, genotype, or signature molecule, a biomarker serves various purposes:
- Identifying the presence of a disease or condition
- Assessing the severity or aggressiveness of the disease
- Predicting the body’s response to treatment for a disease or condition
