What test did he take to get that CRE score?
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Sorry, it was a typo. It is CEA. It is a blood test.
Normal ranges for the colon cancer marker CEA (carcinoembryonic antigen) are typically 0-3 ng/mL for non-smokers and up to 5 ng/mL for smokers. Higher levels can indicate a greater likelihood of cancer, with levels above 10 ng/mL suggesting more extensive disease or metastasis, though a definitive diagnosis always requires further tests.
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