Munson Health
Arnold-Chiari Syndrome

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by McCoy K

(Arnold-Chiari Malformation; Type II Chiari Malformation; Cerebellomedullary Malformation Syndrome)



Symptoms in infants are due to pressure on therear lower part of the brain and the brainstem and may include:
  • Vomiting
  • Weakness
  • Paralysis of the limbs
  • Choking
  • Chronic cough or hoarseness
Symptoms in adolescents are usually milder and may include:
  • Lightheadedness
  • Fainting
  • Weakness in the legs
  • Headaches
  • Inability to hear or ringing in the ears
  • Eye problems such as difficulty seeing, eye pain, and rapid eye movement
  • Poor coordination
  • Uncontrolled shaking or trembling
  • Difficulty walking
  • Numbness or tingling in the arms or legs


American Syringomyelia & Chiari Alliance Project

National Institute of Neurological Disorders and Stroke



Canadian Neurological Sciences Federation

Health Canada



Chiari malformation. Comer Children’s Hospital website. Available at: Accessed February 12, 2014.

Chiari malformations. EBSCO DynaMed website. Available at: Updated March 12, 2012. Accessed February 12, 2014.

Chiari malformation information page. National Institute of Neurological Disorders and Stroke website. Available at: Updated December 30, 2013. Accessed February 12, 2014.

Hekman KE, Aliaga L, et al. Positive and negative predictors for good outcome after decompressive surgery for Chiari malformation type 1 as scored on the Chicago Chiari Outcome Scale. Nuerol Res. 2012;34(7):694-700.


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