The abnormal set of behaviour can be explained by virtue of reduced CTLs activity secondary to suppressive nature of HCC tumour microenvironment and failing to release IFNγ upon stimulation of tumour-infiltrating CD8+ T-cells in contrast to peripheral CD8+ T-cells [48], although the installation of CTLs following isolation and ex-vivo cultivation has exhibited optimum antitumour specific activity [49]. The gene discussed is CD8A; the disease is hepatocellular carcinoma.