Idiopathic late-onset cerebellar ataxia with cerebellar atrophy in a patient diagnosed with Chiari i malformation: A case report

摘要

Chiari malformations (CM) are a group of anomalies involving the hindbrain and the cervical spinal cord. Type I, II and III have in common the descent of the cerebellar tonsils and midbrain into the cervical spinal canal through the foramen magnum [1], while type IV is characterized by severe cerebellar hypoplasia [2]. Usually, it is a disorder of mesodermal origin or it is described in patients with previously inserted ventriculo-peritoneal or lumbar-peritoneal shunts. Often, especially in the congenital cases, an association with abnormalities of the posterior fossa structures has been described [3].