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my cea rose only slightly and was within the normal range when my brain mets were found in early 2003. due to slight but frequent headaches, I got an mri. the mets were tiny and gamma knifed. a year later when more brain mets were found with follow up mri's, my cea was high due to bone mets. I believe I can't depend on my cea for brain mets, but it's been very accruate for other spots. interesting question.
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