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Year : 2015  |  Volume : 10  |  Issue : 3  |  Page : 254-257

A case of mitochondrial cytopathy with exertion induced dystonia

1 Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
2 Department of Clinical Neurosciences, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India

Correspondence Address:
Sadanandavalli Retnaswami Chandra
Department of Neurology, Faculty Block, Neuro Centre, National Institute of Mental Health and Neurosciences, Bengaluru - 560 029, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1817-1745.165683

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Paroxysmal dystonias are a group of relatively benign hyperkinetic childhood movement disorders of varied etiology. Mitochondrial diseases are well known to produce persistent dystonias as sequelae, but paroxysmal exertion induced dystonia has been reported in only one case to the best of our knowledge. Two siblings born to consanguineous parents presented with early-onset exertion induced dystonia, which was unresponsive to diphenylhydantoin and carbamazepine. A trial with valproate in one of the siblings turned fatal within 24 h. Based on this clue, the second child was investigated and found to suffer from complex I deficiency with a paternally inherited dominant nuclear DNA mutation, which is responsive to the mitochondrial cocktail. Exertion induced dystonia can be a rare manifestation of complex I deficiency.


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