Carcinoembryonic Antigen Market Highlights Carcinoembryonic antigen (CEA) is a group of glycoproteins which are produced during the Fetal developmental stages by gastrointestinal tissues. CEA is responsible for cell adhesion. Healthy adults do not have CEA concentrations. However, smoking, and certain medical conditions such as colorectal cancer, breast cancer etc. can mark the presence of CEA...