Managing Epilepsy and Seizures in Aicardi Syndrome

Managing epilepsy is often the most significant challenge for families living with Aicardi syndrome. Because the condition involves widespread changes in how the brain is formed, the seizures that result are typically complex and difficult to control with medication alone ^[1][2]. While achieving total “seizure freedom” is uncommon in Aicardi syndrome, the goal of treatment is often focused on seizure-reduction and symptom-directed treatment—meaning the focus is on reducing the number and severity of seizures, preventing injuries, and improving your child’s quality of life ^[3][4].

The Typical Seizure Journey

For most children with Aicardi syndrome, epilepsy begins very early, often within the first few months of life. The median age for the first seizure is approximately 2.2 months ^[5].

1. Infantile Spasms: The first sign is usually infantile spasms (or epileptic spasms). These are sudden, brief stiffening of the body, arms, or legs that often occur in “clusters” when the child is waking up or falling asleep ^[6]. Suspected infantile spasms are time-sensitive and require prompt pediatric epilepsy assessment and video-EEG confirmation. Do not wait for a routine visit if you suspect these spasms. Evidence-based first-line approaches commonly include hormonal treatment (such as ACTH or prednisolone) and/or vigabatrin, depending on the clinical situation. Early treatment matters.
2. Evolution to Drug Resistance: Over time, these spasms often evolve into other seizure types, such as tonic seizures (sudden stiffening) or “drop attacks” ^[4].
3. Refractory Epilepsy: Most children (over 90%) develop refractory epilepsy, also known as drug-resistant epilepsy. This means the seizures continue even after trying two or more appropriately chosen and dosed antiseizure medications ^[2][4].

The Ketogenic Diet

When medications do not provide enough relief, many families turn to the ketogenic diet. This is a medical, high-fat, low-carbohydrate diet that changes how the brain uses energy. It must be managed strictly by a specialized medical team, including a neurologist and a dietitian. It carries serious safety considerations, including screening for contraindications, medication-carbohydrate issues, hypoglycemia, dehydration, acidosis, kidney stones, and nutrient deficiencies.

Research specifically looking at children with Aicardi syndrome found encouraging, though preliminary, results for the ketogenic diet:

• Response Rate: In a small study of 15 patients, 67% (10 out of 15) achieved at least a 50% reduction in their seizures after three months on the diet ^[3]. Because this study was small, this percentage should not be viewed as an exact predicted success rate for every individual child.
• High Success: About 20% of those children saw a 90% or greater reduction in seizures ^[3].
• Reality Check: While the diet can significantly lower the number of seizures, it rarely stops them entirely. In the same study, only one child achieved temporary seizure freedom ^[3]. Families must not attempt the diet without a specialized epilepsy-nutrition program.

Surgical and Adjunctive Options

If the ketogenic diet and medications are not enough, your medical team may discuss surgical interventions. These are typically viewed as options requiring comprehensive epilepsy-center evaluation to reduce the seizure burden rather than a “cure” for epilepsy.

Vagus Nerve Stimulation (VNS)

A Vagus Nerve Stimulator (VNS) is a small device surgically implanted under the skin of the chest. A wire travels from the device to the vagus nerve in the neck, sending regular, mild pulses of electricity to the brain to help calm seizure activity ^[7]. While data specific to Aicardi syndrome is limited, VNS is a common adjunctive option for children with drug-resistant epilepsy to help reduce seizure frequency and shorten recovery time after a seizure ^[7].

Corpus Callosotomy

A corpus callosotomy is a procedure where the connection between the two halves of the brain is severed. In Aicardi syndrome, where the corpus callosum is already partially or completely missing, this surgery is only considered in highly specific, individualized cases ^[4].

• Goal: The main goal is to stop seizures from spreading from one side of the brain to the other, which can prevent sudden “drop attacks” that cause falls and injuries ^[8].
• Candidacy: This is most often discussed for children who have a partially formed corpus callosum and suffer from frequent, disabling falls ^[4]. A person with complete agenesis has no normal corpus callosum to sever.

Measuring Success

In Aicardi syndrome, success is often measured by more than just a “seizure count.” Families and doctors look at whether a treatment helps the child be more alert, improves their ability to participate in therapies, or reduces the need for emergency room visits. Because the burden of malformations in the brain is high, the management of epilepsy is a lifelong process that requires frequent adjustments and a dedicated care team ^[1][9].