IL13RA2 and glioblastoma: IL-13 receptor α2 (IL13Rα2) is a cancer/testis-like tumor antigen [7], overexpressed in multiple tumors such as CRC, renal cell carcinoma, pancreatic, melanoma, head and neck, mesothelioma, ovarian cancer and glioblastoma, among others [8,9,10,11,12,13,14,15].