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    CEA blood test

    Carcinoembryonic antigen blood test

    The CEA test measures the level of carcinoembryonic antigen (CEA) in the blood. CEA is a protein normally found in the tissue of a developing baby in the womb. The blood level of this protein disappears or becomes very low after birth. In adults, an abnormal level of CEA may be a sign of cancer.

    A blood sample is needed.

    Smoking may increase CEA level. If you smoke, your doctor may tell you to avoid doing so for a short time before the test.

    When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging sensation. Afterward, there may be some throbbing or a slight bruise. These soon go away.

    This test is done to monitor the response to treatment and then to check for the return of colon and other cancers such as medullary thyroid cancer and cancers of the rectum, lung, breast, liver, pancreas, stomach, and ovaries.

    It is not used as a screening test for cancer.

    The normal range is 0 to 2.5 micrograms per liter (mcg/L). In smokers, the normal range is 0 to 5 mcg/L.

    In smokers, slightly higher values may be considered normal.

    A high CEA level in a person recently treated for certain cancers may mean the cancer has returned.A higher than normal level may be due to the following cancers:

    • Breast cancer
    • Cancers of the reproductive and urinary tracts
    • Colon cancer
    • Lung cancer
    • Pancreatic cancer
    • Thyroid cancer

    Higher than normal CEA level alone cannot diagnose a new cancer. Further testing is needed.

    An increased CEA level may also be due to:

    • Liver and gallbladder problems, such as scarring of the liver (cirrhosis), or gallbladder inflammation (cholecystitis)
    • Heavy smoking
    • Inflammatory bowel diseases (such as ulcerative colitisor diverticulitis)
    • Lung infection
    • Inflammation of the pancreas (pancreatitis)
    • Stomach ulcer

    Risks

    Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.

    Other risks associated with having blood drawn are slight but may include:

    • Excessive bleeding (rare)
    • Fainting or feeling lightheaded
    • Hematoma (blood accumulating under the skin)
    • Infection (a slight risk any time the skin is broken)

    References

    Lee P, Jain S, Bowne WB, Pincus MR, McPHerson RA. Diagnosis and management of cancer using serologic and tissue tumor markers. In: McPherson RA, Pincus MR, eds. Henry’s Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, Pa: Elsevier Saunders; 2011:chap 73.

    Sokoll LJ, Chan DW. Biomarkers for cancer diagnostics. In: Abeloff MD, Armitage JO, Niederhuber JE, et al., eds. Abeloff’s Clinical Oncology. 4th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2008:chap 20.

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            Review Date: 9/20/2013

            Reviewed By: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.

            The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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