Rituximab induced cerebral venous sinus thrombosis in a patient with anti-N-methyl-D-aspartate receptor-antibody encephalitis: a case report and review of literature.

Background: Cerebral venous sinus thrombosis has not been reported in anti-N-methyl-D-aspartate receptor-antibody encephalitis in the absence of an underlying thrombotic state while rituximab induced cerebral venous sinus thrombosis is rarely reported. We report a patient with anti-N-methyl-D-aspartate receptor-antibody encephalitis without a prothrombotic state who developed cerebral venous sinus thrombosis following rituximab treatment.

Case Presentation: A 15-year-old Sri Lankan girl who had been in remission following an episode of anti-N-methyl-D-aspartate receptor-antibody encephalitis 2 years ago, presented with a relapse of anti-N-methyl-D-aspartate receptor-antibody encephalitis characterized by recurrent seizures, mutism, and cognitive abnormalities.