• Murat Sutcu, Hacer Akturk, Ayper Somer, Burak Tatli, Selda Hancerli Torun, Edibe Pembegul Yıldız, Guntulu Şık, Agop Citak, Ali Agacfidan, and Nuran Salman.
• Department of Pediatric Infectious Diseases, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey.
• J. Child Neurol. 2016 Mar 1; 31 (3): 345-50.

AbstractPost-herpes simplex virus encephalitis relapses have been recently associated with autoimmunity driven by autoantibodies against N-methyl-d-aspartate (NMDA) receptors. Because it offers different treatment options, determination of this condition is important. Between 2011 and 2014, 7 children with proven diagnosis of herpes simplex virus encephalitis were identified in a university hospital of Istanbul. Two patients had neurologic relapse characterized mainly by movement disorders 2 to 3 weeks after initial encephalitis. The first patient received a second 14 days of acyclovir treatment together with antiepileptic drugs and left with severe neurologic sequelae. The second patient was found to be NMDA receptors antibody positive in the cerebrospinal fluid. She was treated with intravenous immunoglobulin and prednisolone. She showed substantial improvement, gradually regaining lost neurologic abilities. Post-herpes simplex virus encephalitis relapses may frequently be immune-mediated rather than a viral reactivation, particularly in children displaying movement disorders like choreoathetosis. Immunotherapy may provide benefit for this potentially devastating condition, like the case described in this report. © The Author(s) 2015.

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