Blood test for breast cancer
As far as present day recommendations are concerned, the testing for this marker is still not routinely recommended for the exact usefullness of this test is still not definite. For example, in your situation, in the presence of a high level result, your doctors are still not sure on the best way to deal with this result (whether to observe and have the test repeated, or undergo further testing such as X rays or ultrasound of liver).
More often, a high result really does not mean anything significant, especially if the repeat tests reveal almost the same levels. You may have missed out on a smal but significant incremental benefit in survival when you forego with the tamoxifen treatment, but starting it now would still provide some benefit (and this should be discussed with your oncologist).
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