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(A) Contrast-enhanced T1W axial sequence in a patient with GB which shows enhancement following the cisternal segment of the left oculomotor nerve/CNIII (arrow). The image suggests cerebrospinal fluid (CSF) tumor spread with cranial nerve involvement. (B) Contrast-enhancement T1W axial sequence in the same GBM patient demonstrates linear enhancement along the surface of the left lateral ventricle (arrowhead), suggestive of ependymal tumor spread.
