Dandy-Walker syndrome

A cerebellar disease that is characterized by hypoplasia and upward rotation of the cerebellar vermis and cystic dilation of the fourth ventricle.

Signs and symptoms

• Cranial nerve paralysis
• Truncal ataxia
• Nystagmus
• Dilated fourth ventricle
• Hydrocephalus
• Thinning and bulging of the posterior fossa bones
• Posterior fossa cyst at the fourth ventricle
• Elevated imprint of the transverse sinuses
• Partial absence of cerebellar vermis
• Agenesis of cerebellar vermis

Also known as: Atresia of foramina of Magendie and Luschka