the usefulness and specificity of the main tumor markers ( carcinoembryonic antigen , cea ; gastrointestinal cancer-associated antigen , gica ; tissue polypeptide antigen , tpa ; fibrinopeptide a , fpa ; gamma-glutamyltransferase , gamma-gt ) have been investigated in the diagnosis and follow-up of the circumscribed and disseminated gastric cancers ( gcs ) .
C0041365
tumor markers
C0007082
carcinoembryonic