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... access to biomarker testing in Tennessee! Welcome! Biomarker testing helps connect patients with the right treatment at the right time. ACS CAN and partners are working together to make sure more Tennessee residents can benefit from this important testing. Video of biomarker_testing_unlocking_personalized_treatments_to_improve_patient_outcomes What is Biomarker Testing? In cancer care, biomarkers are often used to help determine the best treatment for a patient . A “ biomarker ” is a sign of a normal biological process, disease or abnormal function that can be measured in blood, tissue or bodily fluid.  Biomarker testing  is the ...