Our findings are in contrast with some other immunohistochemical studies reporting that all glioblastomas are CXCR4 positive: Komatani et al. presented 24/24 CXCR4 positive glioblastomas and Stevenson et al. 5/5 CXCR4 positive glioblastomas [17, 27]. Here, CXCR4 is linked to glioblastoma.