The visualized major intracranial vessels appear patent. There is mild mucosal thickening in the sphenoid sinus. There is partial ossification the mastoid air cells bilaterally. IMPRESSION: Bilateral diffuse polymicrogyria associated with dysmorphic gyral pattern. Minimal interval myelination is seen on T2 weighted images with myelination predominantly in the corpus callosum, internal capsules, and medial cerebellar white matter.