TACSTD2 and neoplasm: Our analyses revealed that, while GSE1 gene expression was positively correlated with tumor purity (correlation, cor = 0.13; p = 0.0085), TACSTD2 expression was inversely correlated (cor = −0.08, p = 0.11), suggesting a probable high expression of TACSTD2 in the tumor microenvironment (TME), while GSE1 was highly expressed in tumor cells (Figure 4G).