Some studies reported that METTL3 played an oncogenic role in myeloid leukaemia,29 liver cancer,28 breast cancer,30 glioblastoma,31 bladder cancer 11 and lung cancer.33 Other studies indicated that METTL3 played a tumour suppressor in renal cell carcinoma 34 and glioblastoma.35 These studies suggested the effect of METTL3 on tumour development may be tumour‐specific. This evidence concerns the gene METTL3 and lung cancer.