FIG 3. Case 12: 31-year-old man with bilateral posterior sylvian polymicrogyria.

A, Axial SE (2500/80) image shows normal anterior perisylvian cortex, with thickening of the cortex (arrows) posteriorly.

B, Sagittal SE (600/20) image shows that the abnormal posterior perisylvian cortex extends superiorly (arrows) to the parietal convexity.