While I was on initial chemo treatment, I was never ordered for tumor markers, but when I once recurred, they tested me for only CA27-19, but not CEA. My CA 27-19 results showed a number in the normal range, despite that I was officially stage 4. They have not tested me again since then.
Tumor markers are considered very controversial, as the study data has indicated that numbers were not reliable, regardless of your stage. So, now it just depends on the onc.
Based on past record, some numbers were 'off' due to elevated enzyme levels, but those enzyme levels didn't mean that you had active cancer.
Angela -- perhaps, you test only for RBC & WBC, because you are on chemo treatment, are you?
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