KIT and neoplasm: further subdivided duct‐like cells populations into intercalated ductal‐like cells (KRT19+/AQP5+/KIT+) and duct‐like cells (KRT19+/AQP5−/KIT−), with intercalated ductal‐like cells showing direct relevance to tumor development, participating in NOTCH‐ and MYC‐signaling‐driven tumor proliferation and differentiation pathways, and involvement in immune responses.