As shown in Figure 3A, high expression of DDX21 was linked to poor prognosis in terms of OS for ACC (Figure 3B, log-rank p = 0.00017), CESC (Figure 3C, log-rank p = 0.017), KIRP (Figure 3E, log-rank p = 0.037), MESO (Figure 3F, log-rank p = 0.001), and PAAD (Figure 3G, log-rank p = 0.0089) cancers based on TCGA data. This evidence concerns the gene DDX21 and adrenal cortex carcinoma.