The results in Figures 4(c)–4(f) show that PLEKHA4 expression is closely related to immune (R = 0.66, p < 0.001), ESTIMATE (R = 0.67, p < 0.001), and stromal (R = 0.63, p < 0.001) scores but negatively associated with tumor purity (R = −0.64, p < 0.001). Here, PLEKHA4 is linked to neoplasm.