CTSA and central nervous system cancer: We further analyzed the DSS and PFI through the Kaplan-Meier Plotter database and found that the DSS (HR=2.17 (1.67–2.81) P<0.001) and PFI (HR=1.48 (1.19–1.83) P<0.001) were lower in glioma patients with high CTSA expression than in CTSA low expression group (Figure 3B-Figure 3C).