KCNK9 and intrahepatic cholangiocarcinoma: Furthermore, in coimmunostaining experiments with KCNK9 and an ICC marker c-Kit (Fig. 5D), 22.4% of c-Kit+ cells in MP were found to be KCNK9+ (n = 156) though the double-positive cells had relatively weaker c-Kit immunosignals (i.e., most of the cells with the strongest c-Kit immunosignals lacked KCNK9 immunosignal).