SPINAL CORD - Infant-Arnold: Chiari malformation

In this condition there is displacement of the medulla and vermis of the cerebellum below the level of the foramen into the spinal canal with over-riding of the spinal cord. The malformation is associated with a small posterior fossa and flattening of the base of the skull. The common association of meningomyelocoele with the Arnold-Chiari malformation is shown in this specimen.