1. Should I have a test for CA 27.29 in addition to the CA 15-3 test?
In a word, no. Although it has a different name, the CA 27.29 test measures the same protein as CA 15-3 and is used in the same way. It can be used instead of CA 15-3, but you don't need both tests.
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2. I have a strong family history of breast cancer. Shouldn't I be screened for CA 15-3?
CA 15-3 is not recommended as a screening tool. It is not or enough to detect early
breast cancer. Elevations in CA 15-3 may be due to other causes, and a normal value does not ensure that you do not have cancer. As a rule, it should only be used after breast cancer has been diagnosed.
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3. What can I do to lower my CA 15-3?
There is nothing you can do directly to lower your CA 15-3 level. It is not a risk factor like cholesterol that can be lowered through dietary restrictions and exercise. It is a reflection of what is going on in your body. CA 15-3 may rise with tumor growth and fall with treatment, or it may be mildly elevated and stable in a
benign condition.
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