Chiari Malformations are characterized by descent of the lower portion of the brain through the formaen magnum, the hole in the skull between the brain and spinal cord. Blockage of the foramen magnum affects the flow of cerebrospinal fluid in and around the brain and spinal cord. In addition, there may be compression of the brainstem. Patients with Chiari Malformations may have symptoms such as headache, dizziness, numbness, swallowing difficulties, vision problems, and difficulties with balance and coordination. The Pediatric Chiari Malformation Program at the University of Michigan is dedicated to the early identification and the appropriate surgical or non-surgical treatment of children with Chiari Malformations.