The correlation of expression among the seven genes based on RNA-seq data from TCGA (n = 499) are weaker than the correlation observed in mRNA expression from FFPE tumor sections (n = 21) (Figure 5C), whereas the correlation between EXT2 and SULF2 remained the same (r = 0.50, p < 0.001). This evidence concerns the gene SULF2 and neoplasm.