Depends.: Chiari ii malformation (cm-ii), also known as arnold-chiari malformation, is characterized by downward displacement of the cerebellar vermis and tonsils, a brainstem malformation with beaked midbrain on neuroimaging, and a spinal myelomeningocele. The prognosis depends on syndromic or not nature of the defect and quality of surgical repair. Meningitis is detrimental. Shorter life-span anticipated.
Answered 1/13/2018
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