The gene expression data were obtained from 524 lung adenocarcinoma patients from the TCGA database and were separated into high ACSL4 expression group (n = 262) and low ACSL4 expression group (n = 262), using the median ACSL4 expression level as the cut-off point (See Method section for more details). The gene discussed is ACSL4; the disease is lung adenocarcinoma.