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The clinical test for carcinoembryonic antigen (CEA) is a blood test used to measure the level of CEA in a patient's serum. CEA is a protein produced by certain types of cancer cells, and elevated levels of CEA in the blood can indicate the presence of cancer.
The method for obtaining CEA from a patient's serum involves drawing a sample of blood from the patient and then separating the serum from the other components of the blood. The serum is then tested for the presence of CEA using an enzyme-linked immunosorbent assay (ELISA) or a radioimmunoassay (RIA). These tests measure the amount of CEA in the serum and can be used to diagnose and monitor certain types of cancer.
All of the following must be considered when interpreting clinical findings and are too extensive to be covered on this site: