Peter Attia· MD
the good news is there are companies and technologies that are looking at these things is this belongs into a sub heading of things called liquid biopsies where you could do a blood test and in theory you could find that needle in a haystack you could find that cancer cell that you know you could say well wow this is a colon cell and it has an acquired mutation and that mutation is giving it the capability to escape the colon and take up residence somewhere else