SLC25A21 and female reproductive system neoplasm: To verify whether SLC25A21-AS1 has clinical significance in other tumors, we performed TCGA analysis on more than 20 tumors and found that, in other gynecological tumors, such as Uterine Corpus Endometrial Carcinoma (UCEC), SLC25A21-AS1 expression was low, whereas PTBP3 expression was high (Fig. 8d).