CD4 and cancer: KCNQ1 expression was significantly correlated with CD8+ T cells (r = 0.169, p = 1.85 × 10−4), CD4+ T cells (r = 0.24, p = 6.57 × 10−8), B cells (r = 0.321, p = 2.90 × 10−13), cancer-associated fibroblasts (r = −0.151, p = 7.73 × 10−4), M1 macrophages (r = −0.231, p = 2.27 × 10−7), M2 macrophages (r = 0.242, p = 5.62 × 10−8), and NK cells (r = 0.226, p = 4.07 × 10−7) (Figure 5D–J).