Figure 6. SPIB expression correlates with immune infiltration and immune checkpoint markers. (A) SPIB expression and infiltration levels of various immune cells in the TIMER database. (B) Correlation analysis of SPIB expression levels with the levels of 60 immune checkpoint genes in pan-cancer. (C) SPIB expression in UVM, THCA, KIPAN, SKCM, BLCA, and SKCM-M immune infiltration levels. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001.