IGHG1 and neoplasm: The expression level of IGHG1 was negatively correlated with tumor purity (r = −0.610, p < 0.001) (Figure 4B), but it was positively correlated with the stromal score (r = 0.570, p < 0.001) (Figure 4C), ESTIMATE score (r = 0.610, p < 0.001) (Figure 4D), and immune score (r = 0.610, p < 0.001) (Figure 4E).