Ofatumumab for the treatment of COVID-19-associated autoimmune encephalitis: A case report.

Autoimmune encephalitis is a rare but severe complication of Coronavirus disease 2019 (COVID-19) infection. Typically, treatment involves immunomodulatory approaches such as steroids, intravenous immunoglobulin (IVIG), or plasma exchange. While for some patients, the above treatment is not effective. Here, we report a case of COVID-19-associated encephalitis, who exhibited cognitive impairment, epileptic seizures, tachycardia, and diaphoresis, with cranial MRI findings resembling those seen in limbic encephalitis. Initially, the patient exhibited a suboptimal response to antiviral therapy, high-dose steroids, and IVIG treatment. Nevertheless, his clinical symptoms and cranial MRI abnormalities markedly improved following the administration of Ofatumumab. Administering Ofatumumab early in COVID-19-related autoimmune encephalitis may benefit patients more.