IL17A and neoplasm: A pathological role has also been described for γδT17 cells in human gallbladder cancer (GBC), with an increased frequency of γδ TCR+ cells in the blood and TIL of patients with GBC.40 Here, γδT17‐derived IL‐17 induced expression of vascular endothelial growth factor (VEGF) and other pro‐angiogenic factors by GBC cells, facilitating tumor growth and survival.