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carcinoembryonic antigen

   Also found in: Medical, Acronyms, Encyclopedia, Wikipedia, Hutchinson 0.07 sec.
car·ci·no·em·bry·on·ic antigen  (kärs-n-mbr-nk)
n. Abbr. CEA
A glycoprotein present in fetal gastrointestinal tissue and in the cells or serum of adults having certain types of cancers. It is used clinically to monitor the effectiveness of a treatment, as for colorectal cancer.


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Immunohistochemical staining can be an important diagnostic aid in these cases; columnar cell variants of PTC should be negative for carcinoembryonic antigen and positive for thyroglobulin unless the cells are too poorly differentiated.
Results of testing for tumor-associated antigens, such as carcinoembryonic antigen, carcinoma antigen 19-9, prostatic specific antigen, and alpha fetoprotein, were negative.
16) They found a statistically significant infrequency of gross cystic disease fluid protein-15 in eccrine sweat gland carcinomas, a paucity of carcinoembryonic antigen in breast cancers, and an absence of estrogen receptor protein in salivary duct carcinomas.
 
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