Figure 1

Image example of qualitative invasive phenotype: ependymal extension. 33 year old female patient with right frontal GBM. (a) Axial and (b) coronal post-contrast T1-weighted images demonstrate extension of enhancing tumor into the ependymal region of the frontal horn of the right lateral ventricle. (c) Axial FLAIR image demonstrates non-enhancing tumor as well to extend to the ependymal region.