Figure 2. Identification of differentially expressed and prognostic aging-related genes in CRC. (A) Aging-related genes shared by the training group TCGA and testing group GSE39582. (B) Differentially expressed aging-related genes in the TCGA was displayed in the heatmap and (C) the volcano map. (D) Gene ontology (GO) analysis of these genes. (E) Forest plot of prognostic aging-related genes in the training group.