Clinical Features, Therapeutic Response, and Follow-Up in Pediatric Anti-N-Methyl-d-Aspartate Receptor Encephalitis: Experience from a Tertiary Care University Hospital in India

Madhu Nagappa; Parayil Sankaran Bindu; Anita Mahadevan; Sanjib Sinha; Pavagada S. Mathuranath; Arun B. Taly

doi:10.1055/s-0035-1569464

Neuropediatrics, Table of Contents

Neuropediatrics 2016; 47(01): 024-032
DOI: 10.1055/s-0035-1569464

Original Article

Georg Thieme Verlag KG Stuttgart · New York

Clinical Features, Therapeutic Response, and Follow-Up in Pediatric Anti-N-Methyl-d-Aspartate Receptor Encephalitis: Experience from a Tertiary Care University Hospital in India

Authors

Madhu Nagappa

¹Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
Parayil Sankaran Bindu

¹Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
Anita Mahadevan

²Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
Sanjib Sinha

¹Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
Pavagada S. Mathuranath

¹Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
Arun B. Taly

¹Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India

Abstract

Aim To describe the clinical features in pediatric anti-N-methyl-d-aspartate receptor (NMDAR) encephalitis with specific reference to the spectrum of involuntary movements, and therapeutic response to pulsed intravenous methyl prednisolone.

Method A total of 13 children with anti-NMDAR antibody positivity were evaluated.

Results Abnormal behavior, global regression, and seizures were universal. Movement disorder was characterized by hyperkinetic large amplitude, complex, multidirectional movements involving the limbs and orofacial musculature. Electroencephalogram was abnormal in all during the acute phase. All received intravenous methyl prednisolone. Plasmapheresis (n = 6) and intravenous immunoglobulin (n = 2) were administered due to subtherapeutic response during the acute illness. Monthly pulsed methyl prednisolone was administered to maintain remission. All improved substantially from the acute illness which was reflected in the modified Rankin score. Ten patients were followed up for a median duration of 10.30 ± 6.7 months. Residual symptoms included hypersomnolence, hyperphagia, hyperactivity, overfamiliarity, among others. Three had recurrence of partial syndrome that was related to delay in pulsed methyl prednisolone therapy. They improved and maintained improvement with reinitiation of pulsed methyl prednisolone therapy.

Conclusion Anti-NMDAR encephalitis requires prolonged immunomodulatory therapy. Intravenous pulsed methyl prednisolone therapy is beneficial in inducing and maintaining remission. It is safe, effective, and well tolerated by children with anti-NMDAR encephalitis. The duration of treatment required for sustained remission and cure needs to be determined in long-term studies.

Keywords

pediatric autoimmune encephalitis - anti-NMDAR encephalitis - movement disorders - neuropsychiatric - pulsed methyl prednisolone

Full Text

References

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