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Carcino Embryonic Antigen

Carcino Embryonic Antigen

For men & women
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A carcinoembryonic antigen (CEA) test is a blood test used to diagnose and manage certain types of cancers. The CEA test is used especially for cancers of the large intestine and rectum. CEA is a type of tumor marker which is found in the body. The CEA test is done to monitor cancer treatment. It acts as an indicator of the size of the present tumor and also helps to assist in cancer staging.

In addition to colon and rectal cancer, CEA testing may be done for the following types of cancers like breast, lungs, thyroid, and pancreatic cancer. CEA testing is not used for screening cancer in those who have no symptoms. It is also not used for cancer diagnosis because other noncancerous conditions can cause CEA levels to increase and not all cancers cause CEA levels to rise.

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What does Carcino Embryonic Antigen measure?

Carcinoembryonic antigen (CEA) is a protein that is present in certain tissues of a developing baby (fetus). By the time a baby is born, the levels of this protein drop very low, while in adults CEA is normally present at very low levels in the blood but may get elevated with certain types of cancer.

CEA is a tumor marker for colon cancer and a variety of other cancers like pancreas, breast, lung, ovarian, medullary thyroid, or other cancer. CEA can also be increased in some non-cancer-related conditions, such as inflammation, cirrhosis, peptic ulcer, ulcerative colitis, rectal polyps, emphysema, benign breast disease, and in smokers. Since it is non-specific and can increase in a variety of other conditions, it is not useful as a general cancer screening tool. However, it does help to evaluate and monitor response to cancer treatment. It also acts as an initial baseline test for CEA and then subsequent serial testing of CEA may be performed.


FAQs related to Carcino Embryonic Antigen

The healthcare provider takes a blood sample from the arm. The site from where the blood is to be withdrawn is cleaned with a swab of rubbing alcohol. This is then followed by inserting a small needle which has a tube attached to it for collecting blood. Once the sufficient blood for analysis is withdrawn, the needle is removed. The site is then covered with a gauze pad.
As such there is no risk but in few cases, bruising, bleeding, and infection at the puncture site can be seen. In very few cases, there can be swelling of the vein after the blood is withdrawn.
The implications of test results include monitoring of cancer treatment. Initially elevated levels of CEA when get decreased after surgery indicate that the cancer has been successfully treated. A steadily rising CEA level is often the first sign of tumor recurrence. For staging - On initial testing, people with smaller and early-stage tumors are likely to have a normal or only slightly elevated CEA levels. People with larger tumors (tumor burden), later-stage cancer, or tumors that have spread throughout the body are more likely to have increased CEA levels. For testing of metastasis - Presence of CEA in body fluid other than blood results in increased growth of cancer.
CEA is not a very effective screening test for hidden (occult) cancer since early tumors may not cause significant blood elevations. Also, there are cases where many tumors never cause an abnormal blood level, even in advanced disease.
Content created by
Written by:
Dr. Lipika Khurana
BDS, PGDHHM
Reviewed by:
Dr. Swati Gupta (Anand)
MBBS, MD Lab Medicine
Want to know moreRead our editorial policy
Last Updated17th Mar 2026

Carcino Embryonic Antigen test price for other cities

Price inAhmedabadRs. 556
Price inAllahabadRs. 556
Price inAmritsarRs. 556
Price inBangaloreRs. 556
Price inBhopalRs. 556

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Carcino Embryonic Antigen