Carcinoembryonic Antigen

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** A cancer-specific antigen associated with both tumors and the developing fetus. The main use of this antigen is as a tumor marker, especially with respect to intestinal cancers. Production of the antigen ceases shortly before birth, but may reappear in people who develop certain types of cancer.

**Synonyms:** - CD66 Antigen Family Protein - CD66 Family Protein - CEA - CEA - CEA Family Protein - Carcinoembryonic Antigen Family Protein - carcinoembryonic antigen