Anti-NMDAR and anti-MOG antibody double-positive encephalitis temporally associated with cytomegalovirus detection in cerebrospinal fluid: a case report - Takeaways - MDSpire

Anti-NMDAR and anti-MOG antibody double-positive encephalitis temporally associated with cytomegalovirus detection in cerebrospinal fluid: a case report

  • By

  • Rujue Guo

  • Qili Chen

  • Lingen Kong

  • Aizheng Huang

  • Yankun Li

  • Caiming Li

  • June 9, 2026

  • 0 min

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  • 1

    The case study reports the first instance of overlapping syndrome (MNOS) with coexisting anti-NMDAR and anti-MOG antibodies and cytomegalovirus (CMV) infection.

  • 2

    A 49-year-old man presented with fever and neuropsychiatric symptoms, leading to the diagnosis of MNOS after cerebrospinal fluid analysis.

  • 3

    Metagenomic next-generation sequencing confirmed the presence of CMV DNA in the cerebrospinal fluid, with a high relative abundance.

  • 4

    The patient showed positive anti-NMDAR and anti-MOG antibodies in cerebrospinal fluid, while only anti-MOG antibodies were detected in serum.

  • 5

    Treatment included antiviral agents, corticosteroids, and intravenous immunoglobulin, resulting in gradual improvement of the patient's condition.

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