Bevacizumab in recurrent glioblastoma

In May 2009, the U.S. Food and Drug Administration granted accelerated approval for the use of bevacizumab in patients with progressive glioblastoma (GBM), the most common malignant primary brain tumor in adults (1). Neovascularization is a morphologic hallmark of GBM, driven in part by vascular endothelial growth factor A (VEGF-A) which is targeted and neutralized by bevacizumab.