Figure 6d. Oligodendroglioma. (a) Axial CT image shows a peripheral, ill-defined, hypoattenuating mass (arrow) in the posterior portion of the right temporal lobe. (b) Axial T1-weighted MR image shows low signal intensity of the mass. (c) Axial T2-weighted MR image shows heterogeneous high signal intensity of the mass. (d) Coronal contrast-enhanced T1-weighted MR image shows no enhancement of the mass.