A variety of advanced surgical techniques are available to treat pediatric epilepsy. The most appropriate option is determined through a comprehensive pre-surgical evaluation, ensuring each child receives the safest and most effective approach.
The main categories of therapeutic epilepsy surgery include:
Resection Procedures
The most common epilepsy surgery involves removing (resecting) the area of the brain where seizures begin. Resections can be small and highly targeted, while limiting any functional impairment. Disconnecting an entire hemisphere of the brain (hemispherectomy).
Stereotactic Laser Ablation
This minimally invasive technique uses a laser to destroy seizure-causing brain tissue or tumors without removing them. Benefits include a shorter hospital stay (often just one night), less discomfort, and reduced risk. Children’s Wisconsin is one of the few hospitals in the nation and the only one in Wisconsin offering this advanced technology.
Stimulation Therapies
- Vagus Nerve Stimulation (VNS): A small device is implanted to send very small electrical signals to the brain through the vagus nerve. VNS often reduces seizure frequency and severity, though it usually does not completely stop seizures.
- Responsive Neurostimulation (RNS): RNS involves placing a device directly on or inside the brain to detect abnormal electrical activity and deliver targeted stimulation to stop seizures before they occur.
- Deep Brain Stimulation (DBS): DBS uses electrodes placed in specific brain regions to deliver continuous electrical impulses, helping reduce seizure activity in children with drug-resistant epilepsy.
Disconnection Procedure:
In some cases, rather than removing brain tissue, surgeons may disconnect the seizure-producing area from the rest of the brain. By interrupting the pathways that allow seizures to spread, seizures can be reduced or eliminated.
- Hemispherectomy/Hemispherotomy: In severe cases, an entire hemisphere (half of the brain) may be disconnected from the other half. This is most often considered when seizures are widespread and disabling but limited to one hemisphere.
- Corpus Callosotomy: This procedure involves cutting the corpus callosum, the major connection between the two hemispheres of the brain. While it typically does not eliminate seizures entirely, it is especially effective in reducing the severity and spread of drop attacks (atonic seizures), which can cause sudden falls and injuries.
- Other Disconnection Procedures: These surgeries involve cutting specific connections to reduce the spread and severity of seizures.
Multiple Hippocampal Transections (MHT)
The hippocampus, a deep brain structure important for memory, is often a source of seizures. MHT modifies the hippocampus to stop seizures while preserving memory function, making it an important option for select patients.