STAT4 and neoplasm: The average expression values of STAT1 (p < 0.001), STAT2 (p < 0.001), STAT3 (p < 0.001), STAT4 (p < 0.001), STAT5A (p < 0.001), STAT5B (p < 0.001), and STAT6 (p < 0.001) among immune subtypes C1-C6 in all tumor types were identified to have notable differences (Figure 4A).