Quantitative RT-PCR analyses confirm that the expression of ELK4 exon 2 (sum of fusion and wildtype) is significantly higher than that of exon 1 (wildtype) in 39 prostate tumor samples (p = 3.1E-10, Wilcoxon rank-test; Supplementary Figure 8A). This evidence concerns the gene ELK4 and prostate neoplasm.