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Normal CA 27-29 (Carbohydrate Antigen) in a blood test

Blood test
Normal CA 27-29 (Carbohydrate Antigen) in a blood test
Last update: 26/10/2021

What is the normal value of CA 27-29 (Carbohydrate antigen) in a blood test?

The normal range of the CA 27-29 (Carbohydrate Antigen) is expressed in U/ml.

Men: < 38 U/ml
Women: < 38 U/ml
Children: < 38 U/ml

Why normal values can differ across different labs?

Each laboratory must establish its own normal range for the CA 27-29 (Carbohydrate Antigen) in a blood test. These ranges depend on the makeup of the local population, the technologies used and the accuracy of the measurement. There may be also slight differences in the normal levels according to age, gender, race or ethnic origin, geographic region, diet, type of sample and other relevant status.

Your doctor will study the results along with your medical record, screenings, physical condition, symptoms and any other relevant information about your situation.

What does CA 27-29 (Carbohydrate antigen) mean?

CA 27-29 (Carbohydrate antigen) is a glycoprotein complex found as a mucin on epithelial cells.

CA 27-29 is part of a bigger protein called MUC1 and it is overexpressed in tumors involving glandular epithelial cells, such as breast tumors.

    What is the CA 27-29 (Carbohydrate antigen) test used for?

    The CA 27-29 (Carbohydrate antigen) is a tumor marker. It means that it raises in the presence of a malignant tumor. It is usually high in malignancies of breast, lung and ovaries, but it may be also high in benign tumors and diseases such as endometriosis or ovarian and breast cysts.

    It provides similar information to that of CA 15-3 for the monitor of breast cancer, although the CA 15.3 is more widely used because it has a better sensibility (the proportion of people with the disease who will have a positive result).

    CA 27-29 antigen test is clinically used in the detection of recurrent breast cancer in patients with stage II or stage III disease because it begins to rise before clinical evidence of a relapse. However, the low sensibility of the test is usually a disadvantage against other screening tests.

    CA 27-29 antigen test is helpful in case of metastatic breast cancer because it increases when there are metastasis to other organs or to the bones. It is useful to monitor the progression of the cancer and the efficacy of the treatment.

    Where can I find more information about CA 27-29 (Carbohydrate Antigen) in a blood test?

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    Which values are considered a normal CA 27-29 (Carbohydrate Antigen) in a blood test?

    The following values are considered to be normal values:

    IMPORTANT: These levels are expressed in U/ml. They are an example of a healthy adult of about 40 years old with no known disease and not taking any medication. The ranges can be different depending on the laboratory or on your personal circumstances.

    CA 27-29
    0 U/ml1 U/ml2 U/ml3 U/ml4 U/ml5 U/ml6 U/ml7 U/ml
    8 U/ml9 U/ml10 U/ml11 U/ml12 U/ml13 U/ml14 U/ml15 U/ml
    16 U/ml17 U/ml18 U/ml19 U/ml20 U/ml21 U/ml22 U/ml23 U/ml
    24 U/ml25 U/ml26 U/ml27 U/ml28 U/ml29 U/ml30 U/ml31 U/ml
    32 U/ml33 U/ml34 U/ml35 U/ml36 U/ml37 U/ml38 U/ml 
    Medically reviewed by our Medical staff on 26/10/2021


    • Laboratory tests and diagnostic procedures : with nursing diagnoses. Jane Vincent Corbett, Angela Denise Banks. 8th ed. 2013. ISBN: 978-0-13-237332-6. Pag. 249.
    • Tietz. Fundamentals of Clinical Chemistry. Carl A. Burtis, Edward R. Ashwood, David e. Bruns. 6th edition. 2008. Pag 354. ISBN: 978-0-7216-3865-2.

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