Additionally, the findings of GO, KEGG and GSEA analyses revealed the enrichment in pathways related to DNA replication, cell cycle, oxidative phosphorylation, p53 signalling pathway, tricarboxylic acid (TCA) cycle and small cell lung cancer in the high‐risk group, which is consistent with our previous findings (Figure 5E). The gene discussed is TP53; the disease is small cell lung carcinoma.