The IL‐17 secreted by MAIT cells can promote cancer progression through multiple mechanisms, such as upregulating the expression of vascular endothelial growth factor (VEGF) and VEGF receptors, promoting the recruitment and expansion of immunosuppressive cell populations in tumors, and participating in immune escape and drug resistance of tumor cells [9, 10, 11, 12]. The gene discussed is IL17A; the disease is neoplasm.