Glioblastoma is characterized by microvascular proliferation and a highly abnormal dysfunctional vasculature. The glioblastoma vessels differ significantly from normal brain vessels morphologically, functionally and molecularly. The present review provides a brief overview of the current understanding of the formation, functional abnormalities and specific gene expression of glioblastoma vessels and the consequences of vascular abnormalization for the tumour microenvironment.

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