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A study on viral CNS inflammation beyond herpes encephalitis

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Abstract

The early diagnosis of herpes simplex virus encephalitis (HSVE) enables induction of antiviral therapy in this potentially life-threatening disease. The study aimed to determine clinical findings including cerebrospinal fluid (CSF) data and MRI imaging in HSVE patients and to identify features distinguishing HSVE from encephalitis of other viral etiologies. We retrospectively reviewed consecutive patients who were diagnosed with viral encephalitis between 2000 and 2014 at the University Hospital Halle. Forty-nine patients with viral encephalitis were identified. A viral etiology could be confirmed by PCR or antibody testing in 22/49 (44.9 %) of patients (15 (30.6 %) HSV, 5 (10.2 %) VZV, 2 (4.1 %) EBV). In HSVE, typical findings were focal slowing in electroencephalophy (EEG) (80 %, p = 0.021) and presence of cortical (86.7 %, p = 0.030) lesions in MRI. Restricted diffusion was particularly helpful in detection of early signal abnormalities in HSVE (p = 0.014). In 27/49 (55.1 %) of patients, no causative agent could be elucidated. In these patients, 15/27 (55.6 %) experienced a rather “benign” disease course with no MRI pathology despite initially HSVE mimicking clinical picture. However, CSF was significantly different showing a higher amount of granulocytes and activated lymphocytes. The remaining 12/27 (44.4 %) patients developed MRI changes consistent with encephalitis, in 4 of these patients, disease course was fatal. Beside PCR-based serology as standard procedure, MRI including diffusion-weighted images and EEG represent additional tools in early HSVE diagnosis. CSF cytology might be particularly supportive in differentiating likely benign forms of encephalitis.

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Authors and Affiliations

  1. Department of Neurology, Martin-Luther-University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06097, Halle/Saale, Germany

    Berit Jordan, Alexander Emmer, Tobias Müller & Malte Kornhuber

  2. Department of Radiology, Martin-Luther-University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06097, Halle/Saale, Germany

    Sabrina Kösling

  3. Dermatology Outpatient Clinic Magdeburg, Magdeburg, Germany

    Antje Koch

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  1. Berit Jordan
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  2. Sabrina Kösling
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  3. Alexander Emmer
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  4. Antje Koch
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  5. Tobias Müller
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  6. Malte Kornhuber
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Correspondence to Berit Jordan.

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Jordan, B., Kösling, S., Emmer, A. et al. A study on viral CNS inflammation beyond herpes encephalitis. J. Neurovirol. 22, 763–773 (2016). https://doi.org/10.1007/s13365-016-0452-5

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  • DOI: https://doi.org/10.1007/s13365-016-0452-5

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