The expression of XCR1 was positively correlated with CD8+ T cells in most cancers, such as PAAD (Rho = 0.620), STAD (Rho = 0.556), KIRP (Rho = 0.411), TGCT (Rho = 0.406), etc. (Figure 4B). The gene discussed is XCR1; the disease is cancer.