Thank you for the kind words. It's really the cancerous tissue that has to be sampled. Part of what makes cancer so hard to fight is its ability to mutate quic

Thank you for the kind words. It's really the cancerous tissue that has to be sampled. Part of what makes cancer so hard to fight is its ability to mutate quickly. Someone with enough means would likely have a tumor sampled multiple times (for instance, sample again after the treatment stops working).