FOXP1 and neoplasm: This study investigated the differential expression of FOXP1 in oesophageal squamous cell carcinoma and its impact on the prognosis of tumour patients through bioinformatics analysis, including gene co‐expression analysis, protein–protein interaction (PPI) network construction, gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment, and tumour immune infiltration analysis.