Liquid biopsies (also called serum testing) is a practice already approved in Europe for EGFR lung cancer patients. Drawing blood to test for acquired resistance is easier and quicker than needle biopsies. How long until it is standard practice in the US?

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A few years ago, I reviewed a blood test called VeriStrat that evaluates the patterns of proteins in the blood and reports a profile of either “Good” (in about 2/3 of patients with advanced NSCLC) or “Poor” (in the remaining 1/3 of patients) for EGFR inhibitor therapy.