@rlf66attnet , Knowing the specific type of cancer is important. That allows our doctors to match a treatment to what may be driving the cancer. I have a specific mutation known as ALK positive lung cancer. I started taking a targeted therapy (pills) that is specific to that mutation. The therapy is called alectinib. I know that I am very fortunate to have found a treatment that has worked well for me. I hope you are able to find a treatment that is as effective for you too. My cancer was first identified through a biopsy of the lymph node, and then later refined to knowing that it was driven by the ALK mutation through a liquid/blood biopsy. Are you asking your doctor for biopsies? They can be helpful.