CEA (carcinoembryonic antigen)

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A substance that is sometimes found in high levels in the blood of people with certain cancers, in particular colon cancer. High levels of CEA can also indicate breast cancer as well as a number of non-cancerous problems (like inflamation of the bowel).

For more information on CEA and other blood markers, see Breastcancer.org's Blood Marker Tests page.

Audio contributed by: Marisa Weiss, M.D.