The voltage-gated potassium channel human ether-à-go-go 1 (hEag1, KV10.1) represents an interesting cancer target because it is overexpressed in a wide range of human tumor cells and tissues [4,5,6,7,8,9,10] but is virtually undetectable in healthy tissue outside the central nervous system (CNS) [6,11,12,13]. This evidence concerns the gene KCNH1 and cancer.