Surgical Options: When Medication is Not Enough

When medications and steroids fail to clear the intense electrical activity in your child’s brain, surgery may be considered. While the word “surgery” is frightening, in the context of D/EE-SWAS, it is often used as a powerful tool for cognitive rescue—a way to stop the “electrical noise” and prevent further developmental decline ^[1][2].

Surgery Without Seizures

One of the most important things to understand is that surgery is not only for children who have frequent, visible seizures. In specialized epilepsy centers, surgery can be recommended to stop regression (the loss of skills) or to address profound developmental stagnation ^[1]. If the brain’s “nightly maintenance” is being blocked by constant electrical spikes, removing or disconnecting the source of those spikes can allow the brain to begin functioning more normally again ^[1]. However, surgery is generally considered in carefully selected children with a localizable focal or unilateral epileptogenic lesion. Surgery solely for developmental regression without clinical seizures is uncommon, individualized, and requires multidisciplinary review.

The Role of the Pre-Surgical Evaluation

Before any surgery is performed, your child will undergo an intensive evaluation to see if the “spike-wave” activity is coming from a specific, reachable area.

• The “Normal” MRI: Even if your child’s routine MRI was reported as “normal,” they may still be a candidate for surgery ^[3]. Subtle issues like focal cortical dysplasia (where a small group of brain cells didn’t form correctly) are often invisible on standard scans ^[3].
• Intracranial EEG (Stereo-EEG): If the medical team suspects a focal cause but cannot see it on an MRI, they may use intracranial EEG. This involves placing tiny electrodes directly into or on the brain to pinpoint exactly where the spikes begin ^[3][4]. This localizes electrical onset but does not automatically reveal or make removable a focal cortical dysplasia.
• Functional Imaging: Tests like PET or SPECT scans may be used to look at the brain’s metabolism or blood flow, which can sometimes “highlight” the problem area when an MRI cannot ^[5].

Types of Surgical Procedures

The type of surgery depends entirely on whether the electrical activity is coming from one small spot, one whole side of the brain, or is widespread.

1. Focal Resection: The surgeon removes the small, specific area of the brain where the spikes originate ^[6]. In one study of focal resections, about 78% of children saw their SWAS (spike-wave activity) resolve, and over 70% showed cognitive or behavioral improvement ^[6].
2. Hemispherotomy/Hemispherectomy: If the electrical activity and damage are confined to one entire side (hemisphere) of the brain, that side may be “disconnected” from the healthy side ^[7]. While this is a major procedure, it has very high success rates for stopping regression and clearing the EEG ^[7][8].
3. Corpus Callosotomy: This involves cutting the “bridge” between the two halves of the brain. It is typically a palliative (relieving) option rather than a curative one. While it can reduce the intensity of the spikes and stop “drop attack” seizures, it is less likely than other surgeries to completely clear the SWAS or reverse regression ^[6][9].

Managing Expectations and Understanding Risks

It is vital to have realistic goals for surgery. Research shows that while surgery is highly effective at halting further regression and clearing the abnormal sleep EEG in selected patients, most children do not return to their “pre-ESES” developmental baseline ^[7].

Families need to hear about possible permanent language, motor, visual-field, memory, or behavioral deficits, hemorrhage, infection, hydrocephalus, anesthesia risks, and the possibility that EEG or cognition will not improve. Families are encouraged to seek a second opinion at a specialized pediatric epilepsy surgery center before proceeding.

The goal of surgery is to stop the electrical interference so the brain can begin the long process of healing. Children often make significant gains in language, school performance, and behavior after a successful surgery, but they may continue to have some level of developmental delay or need ongoing support ^[7][6][10]. Early intervention—meaning surgery performed sooner rather than later once medication has failed—is often linked to better long-term outcomes ^[8].