METTL3 and neoplasm: Overexpression of METTL3 followed by treatment with PD-1 monoclonal antibodies did not show a significant trend of tumor regression in the present results, whereas the HPV vaccine has the potential to act as a METTL3 inhibitor, and the combination with PD-1 monoclonal antibodies for cSCC played a synergistic role to further slowdown the tumor growth.