RAC1 is a target of many miRNAs in various cancers, such as miR-194-5p in osteoclasts (Ni et al. 2021), miR‐142‐3p in colorectal cancer (Xie et al. 2021), and miR-509-3p in cervical cancer (Xu et al. 2021), miR-4715-5p in lung cancer (Yang et al. 2019). The gene discussed is RAC1; the disease is lung carcinoma.