CD68 and neoplasm: Correlative analyses of tumor FKBP51s-expression with TME-TAMs calculated an association with several M2 phenotypes, specifically: CD206 (Pearson r = 0.5; P = 0.001), PD-L1 (Pearson r = 0.5; P = 0.001), FKBP51s (Pearson r = 0.8; P < 0.0001), CD36 (Pearson r = 0.5; P = 0.002), CD169 (Pearson r = 0.7; P < 0.0001), and Arg (Pearson r = 0.7; P < 0.0001; Fig. 2C), with the microglia marker CD68 (Pearson r = 0.6; P < 0.0001) and, as expected (16, 19) with tumor-PD-L1 expression (Pearson r = 0.9; P < 0.0001).