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Area of Science:

  • Neurology
  • Neurosurgery
  • Epileptology

Background:

  • Intracranial vascular malformations (IVMs), specifically arteriovenous malformations (AVMs) and cavernous malformations (CCMs), are frequently associated with epilepsy.
  • Seizures are a common presentation for AVMs and CCMs, occurring either initially or after hemorrhage.
  • The International League Against Epilepsy criteria now include first-ever AVM- or CCM-related seizures under the epilepsy diagnosis.

Purpose of the Study:

  • To review the current understanding of epilepsy associated with AVMs and CCMs.
  • To evaluate the efficacy of antiepileptic drugs (AEDs) and invasive therapies for IVM-related epilepsy.
  • To identify gaps in evidence and suggest future research directions.

Main Methods:

  • Review of observational studies and case series on AVM- and CCM-related epilepsy.
  • Analysis of outcomes for antiepileptic drug (AED) monotherapy.
  • Evaluation of evidence regarding invasive procedures versus conservative management.

Main Results:

  • Antiepileptic drugs (AEDs) alone may lead to seizure freedom in 45-78% of AVM-related epilepsy patients and 47-60% of CCM-related epilepsy patients.
  • Evidence suggests underutilization of epilepsy-specific pre-intervention evaluations for invasive procedures.
  • Routine intervention on unruptured AVMs/CCMs shows worse short-term outcomes compared to conservative management.

Conclusions:

  • Antiepileptic drugs (AEDs) are a primary treatment for AVM- and CCM-related epilepsy, achieving seizure freedom in a significant proportion of patients.
  • The role of invasive therapy for IVM-related epilepsy is not definitively established, with mixed results and concerns about outcomes.
  • Further randomized controlled trials are needed to compare immediate invasive therapy versus conservative management, alongside AEDs, for optimal treatment strategies.