Case Report: Focal Myoclonus with a Striatal Lesion as a Presentation of Subacute Sclerosing Panencephalitis

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  • 1 Department of Neurology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India;
  • | 2 Department of Neurology, Adhikari Neurocentre, Patna, India

Adult-onset subacute sclerosing panencephalitis (SSPE) is rare, and focal myoclonus as a presenting feature poses a diagnostic dilemma. We report an adult SSPE patient with unusual clinical and radiological features. A 20-year-old girl had jerky neck movement 9 months earlier, which progressed to left hemimyoclonus in 2 months and generalized frequent myoclonus and fall at 4 months. By 6 months, she was bedbound. On examination, her Mini-Mental State Examination score was 10, and patchy retinitis was observed around the macula. Magnetic resonance imaging revealed corpus striatal involvement and electroencephalography showed periodic discharges. Measles cerebrospinal fluid/serum immunoglobulin G index was 3.3 (normal < 1.3), confirming the diagnosis of SSPE. SSPE should also be considered in adults having focal myoclonus with corpus striatal lesion. EEG is helpful in the diagnosis.

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Author Notes

Address correspondence to Jayantee Kalita, Department of Neurology, Sanjay Gandhi Post Graduate Institute of Medical sciences, Lucknow, India. E-mail: jkalita@sgpgi.ac.in

Disclosure: This study was approved by the institutional ethical committee of SGPGIMS, Lucknow, Uttar Pradesh, India.

Authors’ addresses: Jayantee Kalita, Sarvesh K. Chaudhury, and Mahesh Jadhav, Department of Neurology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India; E-mails: jkalita@sgpgi.ac.in, skc087a@gmail.com, and drmaheshjadhav25@gmail.com. Bishwanath Kumar, Department of Neurology, Adhikari Neurocentre, Patna, India, E-mail: bishusgpgi@gmail.com.

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