Oh my… I honestly dint know much about oncology, but I wonder about the blood test… is it exclusive to that one type of cancer, or can it be indicative of something else? You say this has been unresolved for 7 years… when it was initially diagnosed, did the radiology studies find anything then? You might want to see if there is a specialist or center with experence in this particular condition that might give you a second opinion. I am sorry to hear that you’re dealing with this, and hope that they get you diagnosed promptly so appropriate treatment can be started! Good luck!