Through the analysis of the GEPIA2 database and the expression level differences of OTUD3 in various tumors and corresponding control tissues from The Cancer Genome Atlas (TCGA), we observed a significant downregulation of OTUD3 in multiple tumors such as Ovarian Serous Cystadenocarcinoma (OV), Testicular Germ Cell Tumors (TGCT), Uterine Corpus Endometrial Carcinoma (UCEC), and Uterine Carcinosarcoma (UCS). This evidence concerns the gene OTUD3 and testicular germ cell tumor.