We found that POSTN gene was up‐regulated in several cancer types as compared to the respective healthy tissues such as invasive breast carcinoma, diffuse large B‐cell lymphoma, esophageal carcinoma, glioblastoma multiforme, head and neck squamous cell carcinoma, kidney clear cell carcinoma, lung adenocarcinoma, lung squamous cell carcinoma, ovarian serous cystadenocarcinoma, testicular germ cell tumors, thymoma, and in PAAD (Figure 1A). The gene discussed is POSTN; the disease is testicular germ cell tumor.