Intriguingly, based on the TIMER analysis tool, our results showed a close correlation between FABP4 expression and the abundances of B cells, CD4+ T cells, CD8+ T cells, myeloid dendritic cells, macrophages, and neutrophils, indicating that FABP4 expression affected infiltration immune cells in COAD. This evidence concerns the gene FABP4 and colon adenocarcinoma.