EFNA4 and neoplasm: Additionally, the performed GO and KEGG analyses of the DEGs between the EFNA4-high/ETS1-low and EFNA4-low/ETS1-high groups showed a significant enrichment in the cell activation pathway, which harboured 18 subpathways related to immune cell activation, response, and differentiation et al. These results emphasise the roles of EFNA4 and ETS1 in tumour immune cells.