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Carcinoembryonic Antigen (CEA) Test
Carcinoembryonic Antigen (CEA) Test
Test Overview
The carcinoembryonic antigen (CEA) test measures the amount of this protein that may appear in the blood of some people who have certain kinds of cancers, especially cancer of the large intestine (colon and rectal cancer). It may also be present in people with cancer of the pancreas, breast, ovary, or lung.
CEA is normally produced during the development of a fetus. The production of CEA stops before birth, and it usually is not present in the blood of healthy adults.
Why It Is Done
Why It Is Done
The carcinoembryonic antigen (CEA) test is used to monitor a person before and during treatment. Along with other tests, this test may be used to see how well a treatment is working. And in some cases, it may be used with other tests to see if the cancer has grown or come back.
How To Prepare
How To Prepare
In general, there's nothing you have to do before this test, unless your doctor tells you to.
How It Is Done
How It Is Done
- A health professional uses a needle to take a blood sample, usually from the arm.
How It Feels
How It Feels
When a blood sample is taken, you may feel nothing at all from the needle. Or you might feel a quick sting or pinch.
Risks
Risks
There is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the site.
Results
Results
Results are usually available in 1 to 3 days.
Normal
Each lab has a different range for what's normal. Your lab report should show the range that your lab uses for each test. The normal range is just a guide. Your doctor will also look at your results based on your age, health, and other factors. A value that isn't in the normal range may still be normal for you.
Most cancers do not produce this protein, so your CEA may be normal even though you have cancer.
High values
Many conditions can change your CEA levels. Your doctor will discuss any significant abnormal results with you in relation to your symptoms and medical history.
- Cancer of the colon, lung, pancreas, breast, or ovary may be present.
- Cancer may not be responding to treatment.
- Cancer may have returned after treatment. A steadily rising CEA may be the first sign that cancer has come back after treatment. Also, people with advanced cancer or cancer that has spread to other parts of the body (metastatic cancer) may have high CEA levels if their original cancer produced this protein before treatment.
- Another condition or disease is present, such as cirrhosis, hepatitis, diverticulitis, inflammatory bowel disease, peptic ulcer disease, chronic obstructive pulmonary disease (COPD), inflammation of the gallbladder (cholecystitis), or an obstructed bile duct.
Current as of: May 13, 2023
Author: Healthwise Staff
Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.
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