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Updated: Jul 15, 2025
Author Spotlight: Studying Clinical Characters and Epilepsy Outcomes After Frontal Disconnection in Patients with MOGHE
Published on: August 16, 2024
A multidisciplinary approach to posterior quadrant disconnective epilepsy surgery in pediatric patients
Hiria Limpo1, Santiago Candela-Cantó1, Silvia Asensio2
1Department of Neurosurgery, Epilepsy Surgery Unit, Member of the ERN EpiCARE, Sant Joan de Déu Barcelona Children's Hospital, University of Barcelona, Barcelona, Spain.
Insights
Temporo-parieto-occipital (TPO) disconnection is a safe epilepsy surgery for pediatric drug-resistant epilepsy. This technique preserves motor function and effectively controls seizures, preventing cognitive decline in children.
Area of Science:
- Pediatric Neurology
- Neurosurgery
- Epileptology
Background:
- Drug-resistant epilepsy in children often involves extensive posterior quadrant lesions.
- Conventional multilobar resections pose significant risks in pediatric patients.
- Temporo-parieto-occipital (TPO) disconnection offers motor function preservation but requires further outcome data.
Purpose of the Study:
- To analyze seizure control and developmental outcomes following TPO disconnection in pediatric patients.
- To evaluate the long-term efficacy and safety of TPO disconnection for refractory epilepsy.
Main Methods:
- Prospective analysis of 12 pediatric patients undergoing TPO disconnection.
- Assessment of seizure types, causes (perinatal ischemia, MCD), and affected hemispheres.
- Neuropsychological evaluation and follow-up for seizure outcomes (Engel's classification).
Main Results:
- TPO disconnection was performed in 12 children (median age 6.29 years) with epilepsy onset at a median of 0.97 years.
- 9 out of 12 patients achieved Engel's Class I seizure outcome after a median 2-year follow-up.
- Developmental outcomes showed improvement or stability in 9/12 patients; minor complications were noted.
Conclusions:
- TPO disconnection is a safe and effective surgical option for pediatric drug-resistant epilepsy.
- This motor-sparing technique successfully controls seizures and prevents cognitive deterioration.
- TPO disconnection represents a valuable therapeutic strategy for posterior quadrant epilepsy in children.
Purpose:
Extensive lesions of the posterior quadrant are a relevant cause of pediatric drug-resistant epilepsy. Early surgery is the best treatment in these cases, but conventional multilobar resections carry a significant risk in pediatric patients. Despite temporo-parieto-occipital (TPO) disconnection being the preferable technique due to the preservation of motor function, studies reporting long-term longitudinal outcomes are still limited. This study aims to analyze seizures and developmental outcomes after TPO disconnection.
Methods:
A prospective analysis was carried out on 12 children who underwent TPO disconnection.
Results:
TPO disconnection was performed in 12 pediatric patients aged between 14 months and 18 years (median 6.29 years). The average age of seizure onset was 0.97 ± 1.22 years. Causes of TPO included perinatal ischemia in 4 patients and malformation of cortical development (MCD) in 8 patients. The presenting seizure types were focal motor impaired awareness seizures in 7 children and generalized in 5. The affected hemisphere was the right in 9 patients and the left in 3. In half of the patients, the temporal approach was performed through T1, and in the other 50%, it was performed through T2. After neuropsychological examination, 2 children improved, 7 remained stable, 2 patients presented stagnation and 1 declined. Regarding postoperative complications, nonresorptive hydrocephalus and an asymptomatic caudate nucleus infarct were observed. After a median follow-up of 2 years, 9 patients were in Engel's Class I seizure outcome.
Conclusion:
TPO disconnection is a safe and effective motor-sparing epilepsy surgery for children with refractory seizures located in the posterior quadrant that prevents further cognitive deterioration.
