The data show that mRNA expression of KCNK1, KCNK7, and KCNK9 is upregulated in cancer tissues while KCNK2, KCNK3, KCNK5, KCNK10, KCNK13, KCNK15, and KCNK17 levels are decreased compared to controls. This evidence concerns the gene KCNK2 and cancer.