In the urinary tract, including the renal pelvis, ureter, bladder, and urethra, KIT-positive ICCs, which are referred to as interstitial cells (IC), ICC-like cells, or myofibroblasts [11], have also been identified by their morphological characteristics [5, 12, 13], but show variability among tissues, which may account for individual characteristics of the organs [13]. Here, KIT is linked to intrahepatic cholangiocarcinoma.