The present disclosure relates to methods of treating patients having liver cancer by performing a genome-targeting technique. It is based, at least in part, on the discovery that a genome editing technique that specifically targets genomic mutations can induce cell death in a cancer cell, e.g., a hepatocellular cancer cell, having the genomic gene. The present disclosure provides methods for treating cancer patients that include performing a genome editing technique targeting a genomic mutation present within one or more cells of a subject to produce an anti-cancer effect.