We found a limited number of genes (i.e. 11, Table 2a, p value < 0.05) underexpressed in both Cs and Ps of ST and LT patients, among which CNP and ENPP2 (encoding for 2′, 3′-cyclic nucleotide 3′ phosphodiesterase and for ectonucleotidepyrophosphatase/phosphodiesterase 2, respectively), both oligodendrocyte progenitor cell markers [20], and EDIL3, expressed by oligodendrocytes [20] and a marker of the “neural” subgroup of glioblastoma [13]. The gene discussed is CNP; the disease is glioblastoma.