Using the TIMER2.0 database, we further evaluated the correlation between ELFN1 and various immune-related cells in different cancers, including CAFs, endothelial cells, macrophages, Treg cells, CD4+ memory T cells, CD8+ T cells, B cells, and neutrophils, using algorithms such as EPIC, TIMER, CIBORSORT, and xCELL. Here, CD4 is linked to cancer.