IL17A and neoplasm: γδT and Th17 cells are the two inflammatory cell types primarily responsible for the production of IL-17A in the tumour microenvironment, and the results display that the γδT cells (p = 0.0038 < 0.01) and Th17 cell (p = 0.0213 < 0.05) abundances in the IL17A-hi group were significantly higher(Fig. 2A).