Ashley2235,
I believe gamaryanne stated at one time (at least) that it’s the trend. Is there a trend of ca19-9 going up? My transition into stage 4 occurred 4 months after I completed chemo and my ca19-9 was 24. My CA19-9 was 6 when I had originally had completed chemo. Just 2 weeks before my CT scan was clear. Imaging can be months behind the elevation of your tumor marker. My tumor marker continued to escalate and by the time my imaging (I asked for an MRI instead of a CT based on comments from this site) and endoscopy/biopsy validated the spread to my liver my tumor marker was at 3840. It’s good to know your mutations, and then speak with your oncologist on whether ca19-9 is a good indicator for you.