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We describe a case of myeloneuropathy resulting from nitrous oxide abuse. MR imaging of the spine revealed symmetric abnormal signal in the posterior columns of the cervical cord.Myeloneuropathy is caused by inactivation of vitamin B12 by nitrous oxide.This syndrome can also be seen in patients with borderline vitamin B12 deficiency who have recently been anesthetized with nitrous oxide. |
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anesthesia,general
ataxia
B 12 deficiency
drug abuse
drug abuse,inhalation
drug abuse,neurologic complications of
imbalance
Lhermitte's sign
MRI
MRI,abnormal
MRI,disappearing lesion on
MRI,high signal foci on
MRI,spinal cord
MRI,spinal cord,increased intramedullary cord signal
myeloneuropathy
myelopathy
neuropathy
neuropathy,toxic
neurotoxin
nitrous oxide
paresthesias
polyneuropathy
posterior column disease
Romberg's sign
spinal cord
spinal cord,lesion of
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