IL-13Rα2 protein cell surface expression is relatively high in metastatic prostate cancer cell lines DU145 and PC-3 (59.6 ± 7.2-fold (p ≤ 0.001) and 93.8 ± 7.7-fold (p ≤ 0.001) overexpression in DU145 and PC-3, respectively, compared to PNT2). This evidence concerns the gene IL13RA2 and prostate cancer.