The long term natural history of<unk>  is not known. Some patients have died suddenly as young as 17 years of age, whereas one patient has survived to age 57. Causes of death include respiratory failure, aortic aneurysm, and intracranial hemorrhage.
Occipital horn syndrome
Lateral medullary syndrome
Medial medullary syndrome
Central cord syndrome
Posterior cord syndrome
Surfer's myelopathy
Lateral pontine syndrome
Medial pontine syndrome