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A carcinoembryonic antigen (CEA) test is used to check how well treatment is working in certain types of cancer, particularly colon cancer.
Carcinoembryonic antigens are harmful substances (usually proteins) that are produced by some types of cancer. In response to the antigens, the body produces antibodies to help fight them.
A CEA test is often carried out after surgery to check carcinoembryonic antigen levels.
As well as being a useful marker in cases of colon cancer, CEA tests can also be used to assess other types of cancer including:
Read more about the CEA test at Lab Tests Online UK.