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Figure 1: MR images of a 70-year-old man with glioblastoma confirmed on pathologic examination (WHO grade IV). T2WI on the left shows a heterogeneously hyperintense mass with surrounding intense signal abnormality referred to as marked edema. Pre-contrast T1WI in the middle and post-contrast T1WI on the right show marked ring enhancement

Figure 1: MR images of a 70-year-old man with glioblastoma confirmed on pathologic examination (WHO grade IV). T2WI on the left shows a heterogeneously hyperintense mass with surrounding intense signal abnormality referred to as marked edema. Pre-contrast T1WI in the middle and post-contrast T1WI on the right show marked ring enhancement