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April 02, 2019; 92 (14) Resident & Fellow Section

Teaching Video NeuroImages: Myoclonus as the presenting feature of Wilson disease

Niraj Kumar, Deepak Kumar
First published April 1, 2019, DOI: https://doi.org/10.1212/WNL.0000000000007241
Niraj Kumar
From the Departments of Neurology (N.K.) and Radiology (D.K.), Indira Gandhi Institute of Medical Sciences, Patna; and Department of Neurology (N.K.), All India Institute of Medical Sciences, Rishikesh, India.
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Deepak Kumar
From the Departments of Neurology (N.K.) and Radiology (D.K.), Indira Gandhi Institute of Medical Sciences, Patna; and Department of Neurology (N.K.), All India Institute of Medical Sciences, Rishikesh, India.
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Teaching Video NeuroImages: Myoclonus as the presenting feature of Wilson disease
Niraj Kumar, Deepak Kumar
Neurology Apr 2019, 92 (14) e1667-e1668; DOI: 10.1212/WNL.0000000000007241

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A 10-year-old boy with no pertinent medical or family history developed repeated falls and progressive gait and speech decline over 1 year. Examination revealed multifocal myoclonus and generalized dystonia (video 1). EEG lacked epileptiform activity. Kayser-Fleischer rings, serum ceruloplasmin of 6 mg/dL (normal 20–60 mg/dL), and 24-hour urinary copper of 108.94 μg (normal 15–60 μg) confirmed Wilson disease (WD). MRI brain revealed T2 and fluid-attenuated inversion recovery hyperintensity in basal ganglia, thalami, brainstem, and right frontal cortex, with the latter showing diffusion restriction (figure). The patient improved neurologically with zinc and penicillamine therapy. Myoclonus is uncommon in WD,1 with multifocal myoclonus at onset rarely reported.2

Video 1

Multifocal myoclonus and generalized dystonia. Video shows multifocal myoclonic jerks, craniofacial dystonia with vacuous smile and nonexistent speech, and generalized dystonia with inability to sit, stand, or walk without support.Download Supplementary Video 1 via http://dx.doi.org/10.1212/007241_Video_1

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Figure Basal ganglia, thalamus, brainstem, and cortical involvement on MRI of the brain

MRI of the brain shows fluid-attenuated inversion recovery hyperintensity in basal ganglia (A), thalami (A), midbrain (B), dorsal pons (C), and right frontal cortex (D, white arrow). Diffusion-weighted imaging (E, white arrow) and apparent diffusion coefficient maps (F, white arrow) show a small area of diffusion restriction in the right frontal cortex.

Author contributions

N. Kumar: conception, design, and writing the first manuscript. D. Kumar: review and critique.

Study funding

No targeted funding reported.

Disclosure

The authors report no disclosures relevant to the manuscript. Go to Neurology.org/N for full disclosures.

Footnotes

  • Go to Neurology.org/N for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.

  • Teaching slides links.lww.com/WNL/A849

  • © 2019 American Academy of Neurology

References

  1. 1.↵
    1. Taly AB,
    2. Meenakshi-Sundaram S,
    3. Sinha S,
    4. Swamy HS,
    5. Arunodaya GR
    . Wilson disease. Medicine 2007;86:112–121.
    OpenUrlCrossRefPubMed
  2. 2.↵
    1. Verma R,
    2. Holla V,
    3. Pandey S,
    4. Rizvi I
    . Multifocal myoclonus as a heralding manifestation of Wilson disease. J Pediatr Neurosci 2016;11:358–360.
    OpenUrl

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