Guardant Health, Inc. announced that despite guideline recommendations for comprehensive genomic profiling (CGP) of all patients with advanced non-small cell lung cancer (NSCLC), profiling remains suboptimal due to continued reliance on invasive tissue biopsies for testing. A new study published in JCO Precision Oncology confirms previously reported data showing that the Guardant360® liquid biopsy is not only concordant to tissue genotyping, but detects significantly more informative alterations when used prior to tissue testing, and achieves similar treatment response rates and progression-free survival in patients with NSCLC. The prospective study (n=186) compares comprehensive genomic profiling using the Guardant360 liquid biopsy versus standard-of-care tissue genotyping for first-line treatment decisions in advanced NSCLC. Patients with advanced NSCLC received targeted therapies based on the actionable biomarkers identified. Compared to tissue biopsy genotyping at time of diagnoses, the Guardant360 liquid biopsy was not only concordant with tissue biopsy but detected 23.6% more informative mutations when used first and before tissue biopsy. The study adds to the growing body of evidence demonstrating that using a “blood-first approach” using the Guardant360 test for genomic biomarker detection can identify more actionable biomarkers than a “tissue-first approach”. Importantly, objective response rates and progression-free survival in biomarker-positive patients receiving targeted therapy was similar to previously reported registrational trials. Numerous clinical studies show that patients receiving targeted or personalized treatments have improved progression-free survival and higher overall response rates compared to chemotherapy or immunotherapy. Various factors contribute to clinical adoption of personalized medicine lagging behind recommended medical guidelines, including insufficient tissue for biopsy, which is the case for as many as 30% of solid cancer patients.