Figure 1b. (a) Axial unenhanced CT scan of the brain shows a large (9.5 x 6 cm) space-occupying lesion in the left cerebral hemisphere (arrows) with mass effect and large internal calcifications. (b) Axial unenhanced CT scan of the brain (bone window) shows scalloping of the internal cortex of the parietal bone (arrows) and the calcifications in the tumor.