[Lala]

In general the tumor markers are used to trend response to treatment. I use the tumor markers cea and ca27-29. I do Not use the her2 serum test. I have always found that my tumor markers are accurate as scans have confirmed the results. However for some people tumor markers are not accurate. In some cases of rising tumor marker numbers it can mean the cancer cells are dying at a rapid rate in response to treatment. Or it can mean an infection.

It is best to follow the trend over weeks to see if your tumor markers continue to rise. I would ask for scans to confirm the rising numbers if this trend continues.
I wish you the best.