Anomalie di sviluppo emisferiche e vermiane

Abstract

Many classifications of cerebellar abnormalities have been proposed based on neuroradiological criteria, but they are all inadequate for the purposes of etiopathogenetic assessment. Magnetic resonance gives an excellent evaluation of cerebellar structures and will establish whether there are volumetric changes with a substantially preserved normal morphology or morphological disruption of the cerebellar structures. Morphological changes comprise diffuse or focal, hemispheric or vermian abnormaities with or without abnormalities of the posterior cranial fossa or other brain structures. Ruling out developmental abnormalities characterized by cystic malformations or cortical dysplasia, this paper discusses non-cystic paleocerebellar (vermian) malformations and volumetric changes in the cerebellum (aplasia/hypoplasia).