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Initiative


Informing the future

Education

Prognostic Biomarkers

Overview

A prognostic biomarker helps indicate how a disease may develop in an individual when a disorder is already diagnosed.  The presence or absence of a prognostic marker can be useful for the selection of patients for treatment but does not directly predict the response to a treatment. For example, Oncotype Dx,  a diagnostic test that examines 21 genes, helps determine the likelihood that breast cancer will come back in a patient after initial treatment. This helps the doctor decide whether that patient should continue chemotherapy.