carcinoembryonic antigencar·ci·no·em·bry·on·ic antigen
a glycoprotein, found in serum, urine, etc., that is associated with various types of tumors: monitoring its levels is useful in treating cancer patients
Origin of carcinoembryonic antigen; from carcinoembryonic, relating to or found in both carcinomatous and embryonic tissues ; from carcino- (; from Classical Greek karkin?ma, cancer: see carcinoma) + embryonic
A glycoprotein present in fetal gastrointestinal tissue and in the cells or serum of adults having certain cancers. It is used clinically to monitor the effectiveness of a treatment, as for colorectal cancer.