Since the tumor of this case responded to toceranib therapy, we additionally examined KIT expression in the tumor tissue using immunohistochemistry, with the sections incubated with mouse anti-human Melan-A (Thermo Fisher Scientific, Waltham, MA, USA), mouse anti-human PNL2 (Santa Cruz, Dallas, TX, USA), rabbit anti-human KIT (Dako, Santa Clara, CA, USA), or control antibodies (mouse IgG for Melan-A and PNL2; rabbit IgG for KIT). The gene discussed is KIT; the disease is neoplasm.