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Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.
Carcinoembryonic antigen (CEA) is a protein that is found in many types of cells. It is associated with tumors or a developing fetus. Blood levels of this protein disappear after birth. In adults, CEA may be a possible sign of cancer. The CEA test is performed to monitor the severity of cancer or tumors in the patients. The values obtained after the CEA test indicates the response of body to the therapy.