Type II Chiari malformations are almost always associated with myelomeningoceles, and almost all patients with myelomeningocele have Chiari II. There is typically hydrocephalus. The posterior fossa is small with inferior displacement of the cerebellum, medulla, and fourth ventricle into the upper cervical canal. Other imaging findings are a kinked medulla, colpocephaly (enlargement of the posterior body of the lateral ventricles), enlarged massa intermedia, inferior pointing of the lateral ventricles, and tectal beaking.