 There is a diffusely anomalous gyration pattern of the bilateral posterior perisylvian regions, which is compatible with polymicrogyria. There are also more focal areas of grey matter that extend toward the margins of the lateral ventricles bilaterally, which are compatible with transmantle dysplasia. There is an absent septum pellucidum and mild focal prominence of the temporal horn of the right lateral ventricle associated with mild malrotation of the right hippocampus. The ventricular system is otherwise not significantly enlarged. The corpus callosum, posterior pituitary bright spot, as well as the optic nerves and optic chiasm are grossly intact. There is a small focus of encephalomalacia in the lateral aspect of the inferior right cerebellar hemisphere and perhaps mild hypoplasia of the inferior cerebellar vermis. However, the brainstem appears to be intact. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There is no midline shift or herniation. The major cerebral flow voids are intact. The skull and scalp soft tissues are unremarkable. There is ethmoid sinus mucosal thickening and fluid within the mastoid air cells bilaterally.
1. Congenital bilateral perisylvian syndrome. 2. Nonspecific ethmoid sinus mucosal thickening and fluid within the mastoid air cells bilaterally.