• Internal medicine · Feb 2022

    Case Reports

    A Case of Immunotherapy-responsive Non-paraneoplastic Encephalitis with Antibodies Against GAD, LGI1, and GABAA Receptor.

    • Takahiro Nakano, Norio Chihara, Kento Matoba, Hisatsugu Tachibana, Shiho Okuda, Yoshihisa Otsuka, Takehiro Ueda, Kenji Sekiguchi, Hisatomo Kowa, Frank Leypoldt, Klaus-Peter Wandinger, and Riki Matsumoto.
    • Division of Neurology, Kobe University Graduate School of Medicine, Japan.
    • Intern. Med. 2022 Feb 1; 61 (3): 419-423.

    AbstractA 62-year-old man showed abnormal behavior. Brain magnetic resonance imaging revealed multifocal lesions on T2-weighted images. Initial screening revealed that he was seropositive for antibodies against glutamate decarboxylase, which usually indicates treatment resistance to autoimmune encephalitis (AE). Intensive immunosuppressive therapies, however, improved the neurological symptoms. In line with this, we also detected seropositivity for antibodies against leucine-rich glioma-inactivated 1 and gamma-aminobutyric acid A receptor (GABAAR). Brain imaging and treatment responsiveness suggested that antibodies against GABAAR were the main cause of symptoms. Furthermore, the patient showed the presence of triple anti-neural antibodies in the absence of malignancy and had a favorable clinical course.

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