KCNH8 and neoplasm: Potassium voltage–gated channel subfamily H member 8 (KCNH8) is a member of ELK (EAG-like K+) of the ether-a`-go-go family (KCNH) channels that have been implicated in neuronal excitability, repolarization of cardiac action potential, cell differentiation, and tumor proliferation [29].