Adult-onset drug-refractory seizure disorder associated with anti-voltage-gated potassium-channel antibody

  • Barajas R
  • Collins D
  • Cha S
 et al. 
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Voltage-gated potassium channels are widely expressed throughout the entire nervous system. These channels play a critical role in establishing the resting membrane potential and generation of neuronal action potentials. There is mounting evidence that autoantibodies reactive to neuronal cell surface antigens, such as voltage-gated potassium channels, play a pathogenic role in a wide spectrum of central and peripheral nervous system disorders. We report a case of new-onset drug-refractory seizure disorder associated with the presence of high levels of serum anti-voltage-gated potassium channel antibodies that responded only to immunotherapy. As demonstrated by this case report, anti-voltage-gated potassium channel antibody associated drug-refractory seizure disorder, although rare, should be considered in patients with unexplained adult-onset seizure activity. Once the diagnosis has been established the initiation of immunotherapy should be undertaken without delay.

Author-supplied keywords

  • Anti-VGKC antibody
  • Encephalopathy
  • Limbic encephalitis
  • Seizure disorder

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  • Ramon F. Barajas

  • D. Eric Collins

  • Soonmee Cha

  • Michael D. Geschwind

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