TOPICS: Chiari type I, Chiari type II, Dandy-Walker malformation, craniocervical junction, cerebellar tonsils, cerebellum, foramen magnum, posterior fossa, noncommunicating hydrocephalus, meningeal irritation, brainstem compression, cerebellar dysfunction, syringomyelia, syrinx, spinothalamic tract, cape-like distribution of sensory loss in syringomyelia, cerebellar vermis, herniation, myelomeningocele, central canal, fourth ventricle
