Nevertheless, it will be intriguing to elucidate the roles of DLL4+ Mo-LCs because DLL4+ Mo-LCs may be responsible for T cell activation in autoinflammatory immune diseases such as psoriasis (5–7, 13, 24, 28, 29, 33, 35, 59) and may also be efficacious for cancer treatment (24, 27, 35, 57, 60). Here, DLL4 is linked to cancer.