The evolution of cancer diagnostics continues with the FDA’s May 20 approval of Guardant Health Inc.’s Guardant360 Liquid cDx. The new blood-based comprehensive genomic test assesses a 100-times wider genomic footprint than the previously approved Guardant360 cDx to deliver comprehensive tumor profiling results, according to the company. It noted that the seven companion diagnostic indications already approved for the older test will transfer to the new one.