https://www.selleckchem.com/products/Abiraterone.html Programmed death-ligand 1 (PD-L1) is one of the immune checkpoint proteins, and plays an important role in the progression and microenvironment of cancer. PD-L1 expression has been associated with poor survival in many cancers. Several studies have also shown an association between PD-L1 expression and the prognosis of patients with thymic epithelial tumors (TETs). In this study, we systematically evaluated the prognostic and clinicopathological roles of PD-L1 expression in TETs. We searched the literature through PubMed, Embase and Cochrane library and chose the eligible studies, and subsequently performed a meta-analysis to evaluate the prognostic and clinicopathological roles of PD-L1 expression in TETs. Six of the 75 articles found in the literature were selected. PD-L1 expression was significantly related to unfavorable overall survival (hazard ratio 1.52, 95% confidence interval [CI] 1.01-2.30, P = 0.046) in TETs. PD-L1 expression was significantly associated with male gender (odds ratio [OR] 1.55, 95% CI 1.08-2.22, P = 0.017) and higher Masaoka stage (OR 3.93, 95% CI 2.44-6.32, P < 0.001). PD-L1 expression was correlated with unfavorable prognosis in TETs, indicating PD-L1 expression could help determine the prognosis of TET patients. PD-L1 expression was correlated with unfavorable prognosis in TETs, indicating PD-L1 expression could help determine the prognosis of TET patients. To systematically review relevant literature regarding cardiovascular outcomes of large-bore axillary arterial access via percutaneous and surgical approaches. In patients with severe peripheral arterial disease (PAD) undergoing cardiac interventions, large-bore femoral access may be prohibitive. The axillary artery provides an alternative vascular access for transcatheter aortic valve replacement (TAVR) or mechanical circulatory support. There have been limited comparisons of percutaneous transaxillary (pTAX) approach with the mo