In the present study, we carried out immunohistochemistry of Slug, Twist, E-cadherin, and N-cadherin in meningiomas and non-meningothelial meningeal tumors (10 SFTs and 10 HPCs) to assess differences in expression rates of cadherins and/or transcriptional factors preceding cadherins. This evidence concerns the gene CDH17 and tumor of meninges.