(a) Contrast-enhanced T1-weighted image shows an oligodendroglioma, WHO grade II, in the left frontal lobe. (b) Functional MR imaging and DTI tractography (c) demonstrate the activation of Broca’s area (arrow in (b)) anterior to the tumor and the elevated arcuate fasciculus (arrow in (c)), respectively. The grey sphere in Figure 5(c) indicates the location of tumor.
