Fig. 11

A 42-year-old female with new onset seizures. On noncontrast CT (a), only mild mass effect is noted on the Sylvian fissure and subtle symmetric hypodensity in the temporal lobes. On MR (b), the abnormality is clearly visualized as bilateral temporal and insular FLAIR hyperintensity, crossing midline along the anterior commissure and also extending to the frontal lobe. The lesion did not enhance and biopsy confirmed the diagnosis of low-grade glioma