Looking at Figure 1B, the Mann-Whitney U test indicated that the PSMD2 mRNA expression level in lung adenocarcinoma (n = 535) was significantly upregulated relative to normal lung tissues (n = 59) (6.964 ± 0.698 vs. 6.510 ± 0.177, p < 0.001). Here, PSMD2 is linked to lung adenocarcinoma.