In addition, the Kaplan–Meier plot indicated that reduced expression of TMPRSS2 has been linked with poor RFS prognosis in liver hepatocellular carcinoma, ovarian cancer, pheochromocytoma, stomach adenocarcinoma, paraganglioma, testicular germ cell tumour and uterine corpus endometrial carcinoma (Figure S3 and Table 2). Here, TMPRSS2 is linked to gastric adenocarcinoma.