Toxin
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Ethanol, methyl mercurial compounds, solvents containing toluene and metals such as lead, manganese, and tin
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Nutritional
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Vitamin E deficiency, thiamine deficiency (Wernike-Korsakoff syndrome), Gluten sensitivity (Celiac sprue)
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Endocrinopathy
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Hypothyroidism and hypopituitarism
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Infection
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HIV, varicella, Epstein-Barr, prion (Creutzfeldt-Jakob, Kuru etc.)
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Postinfection
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Guillain-Barre and Bickerstaff's encephalitis
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Structural or lesional
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Ischemic infarction, hemorrhage, neoplasm, demyelination, abscess etc.
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Neurodegeneration
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Multiple systems atrophy and recessively inherited cerebellar ataxias
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Paraneoplastic
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Small cell, breast, and ovarian cancer
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Other
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Idiopathic late onset cerebellar ataxia and ataxia with antiglutamate decarboxylase antibodies
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