3- (1- {3- [5- (1-Methyl-piperidin-4-ylmethoxy) -pyrimidin-2-yl] -benzyl} -6-oxo-1,6-dihydro-pyridazin-3-yl) -benzonitrile, or a pharmaceutically acceptable salt and / or solvate thereof, for use in the treatment of hepatocellular carcinoma (HCC).El 3-(1-{3-[5-(1-metil-piperidin-4-ilmetoxi)-pirimidin-2-il]-bencil}-6-oxo-1,6-dihidro-piridazin-3-il)-benzonitrilo, o una sal y/o un solvato farmacéuticamente aceptable de éste, para usar en el tratamiento del carcinoma hepatocelular (HCC).