XRCC4 and cancer: Figure 3 presented the expression of XRCC4 was significantly negative associated with OS for cancers, including UCEC (HR = 1.82, P = 0.0041), LUAD (HR = 1.70, P = 0.0090), LIHC (HR = 1.70, P = 0.0330), PRAD (HR = 4.30, P = 0.0450), and BRCA (HR = 2.0, P = 0.0028).