Interleukin-17A (IL-17A), an important proinflammatory cytokine that is mainly secreted by Th17 cells, γδT cells and natural killer T (NKT) cells [4], has been described as a common inflammatory factor in numerous tumour microenvironments, in which it can play dichotomous roles in both tumour growth and tumour elimination [5]. Here, IL17A is linked to neoplasm.