hi, Ihad the test last Friday. the test will identify antibodies that the body makes in response to lung cancer whether in situ or not. Still waiting for results. The primary nodule is on surface of heart pericardium so Im told a biopsy is not possible or extremely dangerous to biopsy. This test by Biodesix is also termed a " wet biopsy" highly accurate, it's a simple blood draw. I find it a miracle test.