Early Epilepsy Surgery May Improve Infant Development

What was studied

This study looked at very early epilepsy surgery in infants 6 months old or younger who had severe epilepsy linked to structural brain problems present from birth. The researchers included 23 infants who had surgery and compared them with 115 matched infants who did not have surgery. All had age-dependent epileptic encephalopathy, and all infants in the surgery group had congenital brain malformations.

The babies in the surgery group started having seizures very early, with a median seizure onset of about 0.27 months, and had surgery at an average age of 3.5 months. The most common brain condition was hemimegalencephaly. Researchers assessed seizure outcomes, surgery-related complications, medicine use, and development over time using a developmental quotient (DQ), which measures skills across areas of development.

What they found

In this study, infants who had surgery had better seizure outcomes and more favorable developmental scores over time than matched infants who did not have surgery. In the non-surgery group, developmental scores declined over time. In the surgery group, development showed a more favorable trajectory.

Surgery was significantly associated with higher DQ scores overall, and after matching the groups more closely, the surgery group still had higher scores in all five developmental areas studied. Seizure outcomes were strong: 82.6% were Engel class Ia at 1 year after surgery, and 78.2% were Engel class Ia at an average follow-up of about 44 months. By the last follow-up, 69.6% had stopped anti-seizure medicines.

The surgery group did not have any perioperative deaths or permanent severe complications reported. Some infants had transient weakness on one side of the body, and some developed hydrocephalus after surgery.

Limits of the evidence

This was not a randomized trial, so it cannot prove that surgery caused the better developmental outcomes. Even though the researchers used matching and statistical methods to reduce differences between groups, other factors may still have affected the results.

The surgery group was small, with only 23 infants, and all had congenital brain malformations treated by an experienced team. That means the results may not apply to every infant with epilepsy or to centers with less experience. The abstract also does not give full detail on how the non-surgical infants were treated over time or how development changed in individual children.

For families and caregivers

For families facing severe, drug-resistant epilepsy in a very young infant, this study suggests that surgery done very early can be feasible in carefully selected babies and may be linked to good seizure control and more favorable developmental outcomes. It also suggests that some infants may later be able to stop seizure medicines.

At the same time, this is still limited evidence from a small matched study, not final proof. Families may want to know that the results in this report came from an experienced surgical team and from infants with specific brain malformations.

What to watch next

Larger studies from multiple centers with longer follow-up could help clarify safety, seizure outcomes, and neurodevelopment after very early surgery in infants.

Terms in this summary

drug-resistant epilepsy

Epilepsy that does not come under good control after trying appropriate seizure medicines.

age-dependent epileptic encephalopathy

A severe epilepsy syndrome in early life where frequent seizures and abnormal brain activity can affect development.

developmental quotient (DQ)

A score used to measure a child's development compared with what is expected for age.

hemimegalencephaly

A condition where one side of the brain is abnormally large and can cause severe seizures.

hemispherotomy

A surgery that disconnects much of one side of the brain to stop seizures from spreading.

hydrocephalus

A buildup of fluid in or around the brain.

Engel class Ia

A seizure outcome rating that means completely seizure-free after surgery.

propensity score matching

A statistical method used to make comparison groups more similar in studies that are not randomized.