Tumor Marker CA 19-9: What it means
What exactly is CA 19-9? CA 19-9 (Carbohydrate Antigen 19-9) is a so-called glycoprotein, i.e. a protein to which sugar residues are bound. It is excreted via the bile. This also explains why bile stasis leads to elevated CA 19-9 levels. When is the tumor marker CA 19-9 elevated? The CA 19-9 threshold value is … Tumor Marker CA 19-9: What it means