An evaluation of NDRG2 mRNA expression level, depending on tumour stage in TNM classification was performed for two groups: the first group included pT1 cases (Group pT1, n = 12) and the second one included (because of the small number) combined cases of pT2, pT3 and pT4 (Group pT2-pT4, n = 4) (Figure 3). This evidence concerns the gene NDRG2 and neoplasm.