PKD2 and neoplasm: Similarly, PKD2, GJA4, KCNJ8, TRPC1, KCNJ2, KCND2, KCNB1, CLIC5, CLIC2 and GABRE were previously reported to have a role in tumor growth in several tumors [45,46,47,48,49,50,51,52,53,54,55,56].