In a mouse model of pulmonary melanoma, Th9 cells promote the secretion of CCL20 by epithelial cells, thereby promoting the CCR6-dependent recruitment of DCs to the tumor microenvironment, with subsequent tumor antigen delivery to the draining lymph nodes and CD8+ T cell priming, eventually triggering a potent CTL-killing activity [61]. Here, CCR6 is linked to neoplasm.