TGFBR2, FLI1, ERG and NTRK3 were shared DEmRNAs of hsa‐mir‐9‐1, hsa‐mir‐9‐2 and hsa‐mir‐9‐3, which suggested that mir‐9 might play a crucial role in LUAD by regulating these four lung cancer‐related genes. The gene discussed is TGFBR2; the disease is lung cancer.