Using paraffin embedded sections generated from surgical specimens collected at the Department of Advanced Biomedical Sciences, Pathology Section, of the University of Naples Federico II, we analysed by immunohistochemistry PATZ1 expression in 45 grade IV GBM, 22 oligodendrogliomas (10 grade III and 12 grade II) and 26 perilesional normal brain parenchymas. Here, PATZ1 is linked to oligodendroglioma.