<prompt> Tumor markers for primary hepatocellular carcinoma are all exceptAlpha-feto proteinAlpha-2 macro globulinPIVKA-2Neurotensin  <response>: Tumor markers PIVKA Des-gamma-carboxy prothrombin Glypican-3 AFP fractions AFP-L3 is highly specific to HCC Ref:Sabiston 20th edition Pgno :1458-1463 