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Cerebrospinal fluid CD20 positive B-cell expansion in a case of anti-NMDAR encephalitis
Yiming Zheng1, Jingjing Luo1, Haiqiang Jin1
1Neurology Department, Peking University First Hospital, China.
Abstract:
Anti-N-methyl-d-aspartate receptor (NMDAR) encephalitis is a potentially fatal autoimmune encephalitis with a strong B-cell response. We measured the proportion of CD20 positive and CD19 positive B-cells in the CSF from a case of severe anti-NMDAR encephalitis. The proportion of CD20 positive B-cells in the CSF was 15.0%, higher than CD19 positive B cells (10.1%), and higher than that seen in non-inflammatory neurological disorders (<1%). After the treatments of steroids, intravenous immunoglobulin and rituximab to eliminate B-cells, she recovered. These findings further support the use of rituximab that targets CD20 positive B-cells in anti-NMDAR encephalitis.
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