IL13RA2 and colorectal cancer: However, IL13Rα2 is overexpressed in a variety of tumor types such as colorectal cancer (CRC), renal cell carcinoma, pancreatic, melanoma, head and neck, mesothelioma, ovarian cancer (OC) and glioblastoma (GBM), among others [2,3,4,5,6,7,8,9].