Question About Tumor Markers
A reader posted a question about tumor markers to my blog the other day.
Here's what she wrote:
... Do you know how high the CA 27-29 tests can get? My mother-in-law has breast cancer that has metastasized to her bones. She has already had a spine surgery and also most recently a break in her right leg. Her level has increased dramatically in the last few months.
I have not been able to see how high the markers can get. I appreciate anything you can tell me as it seems that you are very aware of the various tests/markers. I also hope you are doing well.
Regards, Jill
Well, I didn't know the answer, so I e-mailed a couple of my doctors, and here is what Dr. Livingston (in Tucson) said:
Numbers in the hundreds are not uncommon for CA 27.29, usually much lower for CEA if it is elevated. But the absolute level of the tumor marker is not an indicator of how much disease someone has. What is important is whether it is elevated, and if so, whether it is going up or down.
Jill, I hope that helps.
Also, there is my recent experience with my tumor marker (the CEA), which is that it has been in the normal range for months, but I still have several active tumors. Three, actually. They showed up on the PET/CT.
Here's the post that Jill added her comment to:
Tumor Marker: Good (No, GREAT) News, for a Change
And my post about my most recent PET/CT:
The PET/CT Results: Disappointing
@ Jeanne Sather 2008.
