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Stefanos-Yakoub I, Wingeier K, Held U, Latal B, Wirrell E, Smith ML, Ramantani G. Long-term intellectual and developmental outcomes after pediatric epilepsy surgery: A systematic review and meta-analysis. Epilepsia 2024; 65:251-265. [PMID: 38031640 DOI: 10.1111/epi.17834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/20/2023] [Accepted: 11/27/2023] [Indexed: 12/01/2023]
Abstract
In addition to the primary aim of seizure freedom, a key secondary aim of pediatric epilepsy surgery is to stabilize and, potentially, optimize cognitive development. Although the efficacy of surgical treatment for seizure control has been established, the long-term intellectual and developmental trajectories are yet to be delineated. We conducted a systematic review and meta-analysis of studies reporting pre- and postsurgical intelligence or developmental quotients (IQ/DQ) of children with focal lesional epilepsy aged ≤18 years at epilepsy surgery and assessed at >2 years after surgery. We determined the IQ/DQ change and conducted a random-effects meta-analysis and meta-regression to assess its determinants. We included 15 studies reporting on 341 patients. The weighted mean age at surgery was 7.1 years (range = .3-13.8). The weighted mean postsurgical follow-up duration was 5.6 years (range = 2.7-12.8). The overall estimate of the mean presurgical IQ/DQ was 60 (95% confidence interval [CI] = 47-73), the postsurgical IQ/DQ was 61 (95% CI = 48-73), and the change was +.94 IQ/DQ (95% CI = -1.70 to 3.58, p = .486). Children with presurgical IQ/DQ ≥ 70 showed a tendency for higher gains than those with presurgical IQ/DQ < 70 (p = .059). Higher gains were determined by cessation of antiseizure medication (ASM; p = .041), not just seizure freedom. Our findings indicate, on average, stabilization of intellectual and developmental functioning at long-term follow-up after epilepsy surgery. Once seizure freedom has been achieved, ASM cessation enables the optimization of intellectual and developmental trajectories in affected children.
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Affiliation(s)
- Ilona Stefanos-Yakoub
- Department of Neuropediatrics, University Children's Hospital Zurich, Zurich, Switzerland
| | - Kevin Wingeier
- Department of Neuropediatrics, University Children's Hospital Zurich, Zurich, Switzerland
- Department of Psychosomatics and Psychiatry, University Children's Hospital Zurich, Zurich, Switzerland
| | - Ulrike Held
- Department of Biostatistics at Epidemiology, Biostatistics, and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Beatrice Latal
- Child Development Center, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
- University of Zurich, Zurich, Switzerland
| | - Elaine Wirrell
- Divisions of Child and Adolescent Neurology and Epilepsy, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Mary Lou Smith
- Department of Psychology, University of Toronto Mississauga; Neurosciences and Mental Health Program, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Georgia Ramantani
- Department of Neuropediatrics, University Children's Hospital Zurich, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
- University of Zurich, Zurich, Switzerland
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Almacellas Barbanoj A, Graham RT, Maffei B, Carpenter JC, Leite M, Hoke J, Hardjo F, Scott-Solache J, Chimonides C, Schorge S, Kullmann DM, Magloire V, Lignani G. Anti-seizure gene therapy for focal cortical dysplasia. Brain 2024; 147:542-553. [PMID: 38100333 PMCID: PMC10834237 DOI: 10.1093/brain/awad387] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 10/17/2023] [Accepted: 10/31/2023] [Indexed: 12/17/2023] Open
Abstract
Focal cortical dysplasias are a common subtype of malformation of cortical development, which frequently presents with a spectrum of cognitive and behavioural abnormalities as well as pharmacoresistant epilepsy. Focal cortical dysplasia type II is typically caused by somatic mutations resulting in mammalian target of rapamycin (mTOR) hyperactivity, and is the commonest pathology found in children undergoing epilepsy surgery. However, surgical resection does not always result in seizure freedom, and is often precluded by proximity to eloquent brain regions. Gene therapy is a promising potential alternative treatment and may be appropriate in cases that represent an unacceptable surgical risk. Here, we evaluated a gene therapy based on overexpression of the Kv1.1 potassium channel in a mouse model of frontal lobe focal cortical dysplasia. An engineered potassium channel (EKC) transgene was placed under control of a human promoter that biases expression towards principal neurons (CAMK2A) and packaged in an adeno-associated viral vector (AAV9). We used an established focal cortical dysplasia model generated by in utero electroporation of frontal lobe neural progenitors with a constitutively active human Ras homolog enriched in brain (RHEB) plasmid, an activator of mTOR complex 1. We characterized the model by quantifying electrocorticographic and behavioural abnormalities, both in mice developing spontaneous generalized seizures and in mice only exhibiting interictal discharges. Injection of AAV9-CAMK2A-EKC in the dysplastic region resulted in a robust decrease (∼64%) in the frequency of seizures. Despite the robust anti-epileptic effect of the treatment, there was neither an improvement nor a worsening of performance in behavioural tests sensitive to frontal lobe function. AAV9-CAMK2A-EKC had no effect on interictal discharges or behaviour in mice without generalized seizures. AAV9-CAMK2A-EKC gene therapy is a promising therapy with translational potential to treat the epileptic phenotype of mTOR-related malformations of cortical development. Cognitive and behavioural co-morbidities may, however, resist an intervention aimed at reducing circuit excitability.
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Affiliation(s)
- Amanda Almacellas Barbanoj
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Robert T Graham
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Benito Maffei
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Jenna C Carpenter
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Marco Leite
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Justin Hoke
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Felisia Hardjo
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - James Scott-Solache
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Christos Chimonides
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Stephanie Schorge
- Department of Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, UK
| | - Dimitri M Kullmann
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Vincent Magloire
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Gabriele Lignani
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
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Schmidlechner T, Zaddach M, Heinen F, Cornell S, Ramantani G, Rémi J, Vollmar C, Kunz M, Borggraefe I. IQ changes after pediatric epilepsy surgery: a systematic review and meta-analysis. J Neurol 2024; 271:177-187. [PMID: 37770569 PMCID: PMC10770207 DOI: 10.1007/s00415-023-12002-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/07/2023] [Accepted: 09/10/2023] [Indexed: 09/30/2023]
Abstract
OBJECTIVE This systematic review aimed to assess the intellectual outcome of children who underwent surgery for epilepsy. METHODS A systematic review of electronic databases was conducted on December 3, 2021, for PubMed and January 11, 2022, for Web of Science. The review was conducted according to the PRISMA guidelines. The included studies reported on intelligence quotient (IQ) or developmental quotient (DQ) before and after epilepsy surgery in children. Studies were included, if the patients had medically intractable epilepsy and if the study reported mainly on curative surgical procedures. We conducted a random-effects meta-analysis to determine the mean change of IQ/DQ. RESULTS Fifty-seven studies reporting on a total of 2593 patients met the inclusion criteria. The mean age at surgery was 9.2 years (± 3.44; range 2.4 months-19.81 years). Thirty-eight studies showed IQ/DQ improvement on a group level, 8 yielded stable IQ/DQ, and 19 showed deterioration. Pooled analysis revealed a significant mean gain in FSIQ of + 2.52 FSIQ points (95% CI 1.12-3.91). The pooled mean difference in DQ was + 1.47 (95% CI - 6.5 to 9.5). The pooled mean difference in IQ/DQ was 0.73 (95% CI - 4.8 to 6.2). Mean FSIQ gain was significantly higher in patients who reached seizure freedom (+ 5.58 ± 8.27) than in patients who did not (+ 0.23 ± 5.65). It was also significantly higher in patients who stopped ASM after surgery (+ 6.37 ± 3.80) than in patients who did not (+ 2.01 ± 2.41). Controlled studies showed a better outcome in the surgery group compared to the non-surgery group. There was no correlation between FSIQ change and age at surgery, epilepsy duration to surgery, and preoperative FSIQ. SIGNIFICANCE The present review indicates that there is a mean gain in FSIQ and DQ in children with medically intractable epilepsy after surgery. The mean gain of 2.52 FSIQ points reflects more likely sustainability of intellectual function rather than improvement after surgery. Seizure-free and ASM-free patients reach higher FSIQ gains. More research is needed to evaluate individual changes after specific surgery types and their effect on long-term follow-up.
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Affiliation(s)
- Tristan Schmidlechner
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-University Munich, Lindwurmstreet 4, 80337, Munich, Germany
| | - Malin Zaddach
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-University Munich, Lindwurmstreet 4, 80337, Munich, Germany
| | - Florian Heinen
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-University Munich, Lindwurmstreet 4, 80337, Munich, Germany
| | - Sonia Cornell
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-University Munich, Lindwurmstreet 4, 80337, Munich, Germany
| | - Georgia Ramantani
- Department of Neuropediatrics, University Children's Hospital, Zurich, Switzerland
- University of Zurich, Zurich, Switzerland
| | - Jan Rémi
- Department of Neurology, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
- Comprehensive Epilepsy Center, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Christian Vollmar
- Department of Neurology, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
- Comprehensive Epilepsy Center, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Mathias Kunz
- Department of Neurosurgery, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
- Comprehensive Epilepsy Center, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Ingo Borggraefe
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-University Munich, Lindwurmstreet 4, 80337, Munich, Germany.
- Comprehensive Epilepsy Center, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany.
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Jiménez-Murillo D, Castro-Ospina AE, Duque-Muñoz L, Martínez-Vargas JD, Suárez-Revelo JX, Vélez-Arango JM, de la Iglesia-Vayá M. Automatic Detection of Focal Cortical Dysplasia Using MRI: A Systematic Review. SENSORS (BASEL, SWITZERLAND) 2023; 23:7072. [PMID: 37631608 PMCID: PMC10458261 DOI: 10.3390/s23167072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/02/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023]
Abstract
Focal cortical dysplasia (FCD) is a congenital brain malformation that is closely associated with epilepsy. Early and accurate diagnosis is essential for effectively treating and managing FCD. Magnetic resonance imaging (MRI)-one of the most commonly used non-invasive neuroimaging methods for evaluating the structure of the brain-is often implemented along with automatic methods to diagnose FCD. In this review, we define three categories for FCD identification based on MRI: visual, semi-automatic, and fully automatic methods. By conducting a systematic review following the PRISMA statement, we identified 65 relevant papers that have contributed to our understanding of automatic FCD identification techniques. The results of this review present a comprehensive overview of the current state-of-the-art in the field of automatic FCD identification and highlight the progress made and challenges ahead in developing reliable, efficient methods for automatic FCD diagnosis using MRI images. Future developments in this area will most likely lead to the integration of these automatic identification tools into medical image-viewing software, providing neurologists and radiologists with enhanced diagnostic capabilities. Moreover, new MRI sequences and higher-field-strength scanners will offer improved resolution and anatomical detail for precise FCD characterization. This review summarizes the current state of automatic FCD identification, thereby contributing to a deeper understanding and the advancement of FCD diagnosis and management.
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Affiliation(s)
- David Jiménez-Murillo
- Grupo de investigación Máquinas Inteligentes y Reconocimiento de Patrones, Instituto Tecnológico Metropolitano, Medellín 050013, Colombia; (D.J.-M.); (L.D.-M.)
| | - Andrés Eduardo Castro-Ospina
- Grupo de investigación Máquinas Inteligentes y Reconocimiento de Patrones, Instituto Tecnológico Metropolitano, Medellín 050013, Colombia; (D.J.-M.); (L.D.-M.)
| | - Leonardo Duque-Muñoz
- Grupo de investigación Máquinas Inteligentes y Reconocimiento de Patrones, Instituto Tecnológico Metropolitano, Medellín 050013, Colombia; (D.J.-M.); (L.D.-M.)
| | | | - Jazmín Ximena Suárez-Revelo
- Grupo de Investigación en Imágenes Médicas SURA, Ayudas Diagnósticas SURA, Carrera 48 # 26-50, Piso 2, Medellín 050021, Colombia; (J.X.S.-R.); (J.M.V.-A.)
| | - Jorge Mario Vélez-Arango
- Grupo de Investigación en Imágenes Médicas SURA, Ayudas Diagnósticas SURA, Carrera 48 # 26-50, Piso 2, Medellín 050021, Colombia; (J.X.S.-R.); (J.M.V.-A.)
| | - Maria de la Iglesia-Vayá
- Biomedical Imaging Unit FISABIO-CIPF, Foundation for the Promotion of the Research in Healthcare and Biomedicine (FISABIO), Avda. de Catalunya, 21, 46020 Valencia, Spain;
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM-G23), 28029 Madrid, Spain
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Makridis KL, Hoyer S, Elger CE, Kaindl AM. Is There a Cognitive Decline in Pediatric Patients Following Epilepsy Surgery? Pediatr Neurol 2023; 144:44-49. [PMID: 37146539 DOI: 10.1016/j.pediatrneurol.2023.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 03/13/2023] [Accepted: 03/30/2023] [Indexed: 05/07/2023]
Abstract
BACKGROUND Epilepsy surgery is currently the only way to cure drug-resistant epilepsy (DRE). The loss of epileptic activity or its propagation in the developing brain may not only result in seizure freedom but also be associated with further positive effects. Here, we analyzed the cognitive development of children and adolescents with DRE after epilepsy surgery. METHODS We evaluated retrospectively the cognitive development of children and adolescents before and after epilepsy surgery. RESULTS Fifty-three children and adolescents underwent epilepsy surgery at a median age of 7.62 years. Overall seizure freedom was 86.8% at a current median observation period of 20 months. Presurgically, 81.1% had the clinical diagnosis of cognitive impairment, which was confirmed by standardized tests in 43 of 53 patients (76.7%). Further 10 patients had severe cognitive impairment rendering a standardized test impossible. The median intelligence quotient (IQ)/development quotient value was 74. After surgery, caretakers reported developmental progress in all patients, whereas the median IQ decreased slightly (P = 0.404). In eight patients the IQ points decreased after surgery; however, their individual raw scores increased in line with their reported increase in cognitive abilities. CONCLUSIONS We did not detect any cognitive deterioration in children following epilepsy surgery. A loss of IQ points did not correspond to a real loss of cognitive abilities. These patients developed more slowly than age-matched peers with an average development speed but profited individually as seen in their raw scores. Therefore, an individual analysis of raw scores is relevant to assess the cognitive development after surgery.
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Affiliation(s)
- Konstantin L Makridis
- Department of Pediatric Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Center for Chronically Sick Children, Charité - Universitätsmedizin Berlin, Berlin, Germany; German Epilepsy Center for Children and Adolescents, Charité - Universitätsmedizin Berlin, Berlin, Germany; Institute of Cell- and Neurobiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Sebastian Hoyer
- Department of Pediatric Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Center for Chronically Sick Children, Charité - Universitätsmedizin Berlin, Berlin, Germany; German Epilepsy Center for Children and Adolescents, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Christian E Elger
- Department of Pediatric Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Center for Chronically Sick Children, Charité - Universitätsmedizin Berlin, Berlin, Germany; German Epilepsy Center for Children and Adolescents, Charité - Universitätsmedizin Berlin, Berlin, Germany; Beta Neurologie - Kompetenzzentrum für Epilepsie, Beta Klinik GmbH, Bonn, Germany
| | - Angela M Kaindl
- Department of Pediatric Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Center for Chronically Sick Children, Charité - Universitätsmedizin Berlin, Berlin, Germany; German Epilepsy Center for Children and Adolescents, Charité - Universitätsmedizin Berlin, Berlin, Germany; Institute of Cell- and Neurobiology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
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Vasilica AM, Winsor A, Chari A, Scott R, Baldeweg T, Tisdall M. The influence of disease course and surgery on quality of life in children with focal cortical dysplasia and long-term epilepsy-associated tumours: A systematic review and meta-analysis. Epilepsy Res 2023; 192:107132. [PMID: 37023554 DOI: 10.1016/j.eplepsyres.2023.107132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/22/2023] [Accepted: 03/27/2023] [Indexed: 04/08/2023]
Abstract
INTRODUCTION Carefully selected patients with lesional epilepsy, including focal cortical dysplasia (FCD) and long-term epilepsy-associated tumours (LEAT), can benefit from epilepsy surgery. The influence of disease course and subsequent epilepsy surgery on quality of life (QoL) and intelligence quotient (IQ) is not well understood. METHODS A systematic review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies reporting QoL or IQ measures in paediatric patients with FCD and LEAT at epilepsy onset, at establishment of drug resistance (pre-operative/non-surgically managed) and post-operatively were included. To evaluate the "effect size" and clinical significance of surgery, a meta-analysis of the data was conducted using fixed effects models for weighted mean differences, 95% confidence intervals and sensitivity analyses. RESULTS Nineteen eligible studies (911 patients) were included, 17 assessing IQ and 2 evaluating QoL. Twelve studies reported preoperative and postoperative IQ measures and five reported IQ in non-surgically managed cohorts after drug resistance was established; no papers reported IQ at epilepsy onset. No significant IQ/DQ changes were detected after surgery (pre-operative pooled mean 69.32; post-operative pooled mean 69.98; p = 0.32). Age at epilepsy surgery, type of surgery and epilepsy-related pathology did not influence the post-operative IQ. QoL was reported in 2 studies with the pooled mean estimates for pre- and post-operative QoL being 42.52 and 55.50, respectively. CONCLUSIONS The present study demonstrated no statistical change in IQ and QoL following surgery in paediatric patients with FCD and LEAT. There was no data on IQ and QoL at disease onset. Attempting to understand the impact of epilepsy, ongoing seizures and surgery on IQ and QoL will facilitate planning of future studies that aim to optimise quality of life and developmental outcomes in these children. Studies assessing children at epilepsy onset with longitudinal follow-up are required to optimise the timing of epilepsy surgery on QoL and IQ.
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Affiliation(s)
| | - Alice Winsor
- Department of Basic and Clinical Neuroscience, King's College London, London, United Kingdom
| | - Aswin Chari
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom; Department of Neurosurgery, Great Ormond Street Hospital, London, United Kingdom.
| | - Rodney Scott
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom; Division of Neurology, Nemours Children's Hospital Delaware, Wilmington, DE, United States
| | - Torsten Baldeweg
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Martin Tisdall
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom; Department of Neurosurgery, Great Ormond Street Hospital, London, United Kingdom
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Liu C, Hu Y, Zhou J, Guan Y, Wang M, Qi X, Wang X, Zhang H, Adilijiang A, Li T, Luan G. Retrospective Clinical Analysis of Epilepsy Treatment for Children with Drug-Resistant Epilepsy (A Single-Center Experience). Brain Sci 2022; 13:brainsci13010014. [PMID: 36671996 PMCID: PMC9856722 DOI: 10.3390/brainsci13010014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/17/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
Objectives: This retrospective cohort study investigated the clinical characteristics and seizure outcomes of patients aged 1−14 years with drug-resistant epilepsy (DRE) who were treated by different typologies of therapy. Methods: Four hundred and eighteen children with DRE were recruited from Sanbo Brain Hospital of Capital Medical University from April 2008 to February 2015. The patients were divided into three groups: medication (n = 134, 32.06%), resection surgery (n = 185, 44.26%), and palliative surgery (n = 99, 23.68%) groups. Demographic characteristics were attained from medical records. All patients were followed up for at least 5 years, with seizure outcomes classified according to International League Against Epilepsy criteria. The psychological outcome was evaluated with the development quotient and Wechsler Intelligence Quotient Scale for children (Chinese version). Results: The most frequent seizure type was generalized tonic seizure in 53.83% of patients. Age at seizure onset in 54.55% of patients was <3 years. The most frequent etiologies were focal cortical dysplasia (FCD). West syndrome was the most common epilepsy syndrome. Favorable seizure outcomes at the 5-year follow-up in the medication, resection surgery, and palliative surgery groups were 5.22%, 77.30%, and 14.14%, respectively. The patients showed varying degrees of improvement in terms of developmental and intellectual outcomes post-treatment. Conclusions: Pediatric patients with DRE were characterized by frequent seizures, a variety of seizure types, and complex etiology. Recurrent seizures severely affected the cognitive function and development of children. Early surgical intervention would be beneficial for seizure control and prevention of mental retardation. Palliative surgery was also a reasonable option for patients who were not suitable candidates for resection surgery.
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Affiliation(s)
- Changqing Liu
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Beijing Key Laboratory of Epilepsy, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Center of Epilepsy, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100093, China
| | - Yue Hu
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Department of Neurosurgery, Aviation General Hospital, China Medical University, Beijing 100012, China
| | - Jian Zhou
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Beijing Key Laboratory of Epilepsy, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Center of Epilepsy, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100093, China
| | - Yuguang Guan
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Beijing Key Laboratory of Epilepsy, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Center of Epilepsy, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100093, China
| | - Mengyang Wang
- Center of Epilepsy, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100093, China
- Department of Neurology, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
| | - Xueling Qi
- Department of Pathology, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
| | - Xiongfei Wang
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Center of Epilepsy, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100093, China
| | - Huawei Zhang
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
| | | | - Tiemin Li
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
| | - Guoming Luan
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Beijing Key Laboratory of Epilepsy, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Center of Epilepsy, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100093, China
- Correspondence:
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8
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Novais F, Andrea M, Andrade G, Loureiro S, Pimentel J, Câmara Pestana L. Intelligence quotient (IQ) as a predictor of epilepsy surgery outcome. Epilepsy Behav 2022; 132:108708. [PMID: 35640399 DOI: 10.1016/j.yebeh.2022.108708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/20/2022] [Accepted: 04/15/2022] [Indexed: 11/03/2022]
Abstract
INTRODUCTION About one-third of patients with epilepsy have a refractory form which is associated with important economic and psychosocial burden. Most of these patients also suffer from comorbidities. One of the most frequent is cognitive impairment. Resective surgery or neuromodulation techniques may improve seizure control. Several factors have been proposed as potential predictors of the success of surgery regarding seizure frequency. We aimed to study preoperative cognitive performance as a predictor of the epilepsy surgery outcome. METHODS In this ambispective study we studied total intelligence quotients (IQ) measured before surgery with the Wechsler Adult Intelligence Scale (WAIS) as a potential predictor of Engel Class at 1 year after surgery. Then we included IQ in a multivariate model and tested its performance. RESULTS Preoperative IQ was a significant and independent predictor of the Engel Class at 1 year after surgery (OR 0.94; CI 0.90-0.98; p = 0.007). The multivariate model including the age at epilepsy onset, education level, sex, and the type of surgery (resective versus palliative surgery) showed an area under the ROC curve of 0.85. CONCLUSIONS A low intelligence level may constitute a marker of worse prognosis after epilepsy surgery. However, other predictors should also be considered when evaluating surgical candidates.
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Affiliation(s)
- Filipa Novais
- Department of Neurosciences and Mental Health, Psychiatry Department, Hospital de Santa Maria (CHULN), Lisbon, Portugal; Faculdade de Medicina, Universidade de Lisboa, Portugal; Centro de Referência de Epilepsia Refratária, Hospital de Santa Maria, (CHULN), Lisboa, Portugal; EpiCARE Network, European Reference Network for Rare and Complex Epilepsies, Portugal.
| | - Mafalda Andrea
- Department of Neurosciences and Mental Health, Psychiatry Department, Hospital de Santa Maria (CHULN), Lisbon, Portugal; Centro de Referência de Epilepsia Refratária, Hospital de Santa Maria, (CHULN), Lisboa, Portugal; EpiCARE Network, European Reference Network for Rare and Complex Epilepsies, Portugal
| | - Gabriela Andrade
- Department of Neurosciences and Mental Health, Psychiatry Department, Hospital de Santa Maria (CHULN), Lisbon, Portugal; Faculdade de Medicina, Universidade de Lisboa, Portugal
| | - Susana Loureiro
- Department of Neurosciences and Mental Health, Psychiatry Department, Hospital de Santa Maria (CHULN), Lisbon, Portugal; Faculdade de Medicina, Universidade de Lisboa, Portugal; Centro de Referência de Epilepsia Refratária, Hospital de Santa Maria, (CHULN), Lisboa, Portugal; EpiCARE Network, European Reference Network for Rare and Complex Epilepsies, Portugal
| | - José Pimentel
- Faculdade de Medicina, Universidade de Lisboa, Portugal; Department of Neurosciences and Mental Health, Neurology Department, Hospital de Santa Maria (CHULN), Lisbon, Portugal; Centro de Referência de Epilepsia Refratária, Hospital de Santa Maria, (CHULN), Lisboa, Portugal; EpiCARE Network, European Reference Network for Rare and Complex Epilepsies, Portugal
| | - Luís Câmara Pestana
- Department of Neurosciences and Mental Health, Psychiatry Department, Hospital de Santa Maria (CHULN), Lisbon, Portugal; Faculdade de Medicina, Universidade de Lisboa, Portugal; Centro de Referência de Epilepsia Refratária, Hospital de Santa Maria, (CHULN), Lisboa, Portugal; EpiCARE Network, European Reference Network for Rare and Complex Epilepsies, Portugal
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9
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Cloppenborg T, van Schooneveld M, Hagemann A, Hopf JL, Kalbhenn T, Otte WM, Polster T, Bien CG, Braun KPJ. Development and Validation of Prediction Models for Developmental and Intellectual Outcome Following Pediatric Epilepsy Surgery. Neurology 2021; 98:e225-e235. [PMID: 34795046 DOI: 10.1212/wnl.0000000000013065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 11/12/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES To (1) identify predictors of postoperative intelligence and developmental quotients (IQ/DQ) and (2) develop and validate clinically applicable IQ/DQ prediction models. METHODS We retrospectively analyzed neuropsychological outcomes and their possible determinants for children treated in Bethel and Utrecht since 1990. We performed separate analyses for patients with IQ and those with only DQ available. We developed prediction models based on presurgical determinants to predict dichotomized levels of performance (IQ≥85, IQ≥70, DQ≥50). RESULTS IQ/DQ data before and two years after surgery were available for 492 patients (IQ n=365, DQ n=127). At a cutoff-level ±10 points, the chance of improvement was considerably higher than the chance of deterioration (IQ 37.3% vs. 6.6% and DQ 31.5% vs. 15.0%, respectively). Presurgical IQ/DQ was the strongest predictor of postoperative cognition (IQ r=0.85, p<.001, DQ: r=0.57, p<.001).Two IQ models were developed in the Bethel cohort (n=258) and externally validated in the Utrecht cohort (n=102). For DQ, we developed the model in the Bethel cohort and used 10-fold cross-validation. Models allowed good prediction at all three cutoff-levels (correct classification for IQ≥85=86%, IQ≥70=91%, DQ≥50=76%). External validation of the IQ models showed high accuracy (IQ≥85: 0.82, CI 0.75-0.91, IQ≥70: 0.84, CI 0.77-0.92) and excellent discrimination (ROC curves IQ≥85: AUC 0.90, CI 0.84-0.96; IQ≥70: AUC 0.92, CI 0.87-0.97). DISCUSSION After epilepsy surgery in children, the risk of cognitive deterioration is very low. Presurgical development has a strong impact on the postoperative trajectory. The presented models can improve presurgical counseling of patients and parents by reliably predicting cognitive outcomes. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that for children undergoing epilepsy surgery presurgical IQ/DQ was the strongest predictor of postoperative cognition.
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Affiliation(s)
- Thomas Cloppenborg
- Bielefeld University, Medical School, Department of Epileptology (Krankenhaus Mara), Bielefeld, Germany
| | - Monique van Schooneveld
- University Medical Center Utrecht, Department of Pediatric Neurology, The Netherlands, member of the ERN EpiCARE
| | | | - Johanna Lena Hopf
- Bielefeld University, Medical School, Department of Epileptology (Krankenhaus Mara), Bielefeld, Germany
| | - Thilo Kalbhenn
- Bielefeld University, Medical School, Department of Neurosurgery (Evangelisches Klinikum Bethel), Bielefeld, Germany
| | - Willem M Otte
- University Medical Center Utrecht, Department of Pediatric Neurology, The Netherlands, member of the ERN EpiCARE
| | - Tilman Polster
- Bielefeld University, Medical School, Department of Epileptology (Krankenhaus Mara), Bielefeld, Germany
| | - Christian G Bien
- Bielefeld University, Medical School, Department of Epileptology (Krankenhaus Mara), Bielefeld, Germany
| | - Kees P J Braun
- University Medical Center Utrecht, Department of Pediatric Neurology, The Netherlands, member of the ERN EpiCARE
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10
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Holthausen H, Coras R, Tang Y, Bai L, Wang I, Pieper T, Kudernatsch M, Hartlieb T, Staudt M, Winkler P, Hofer W, Jabari S, Kobow K, Blumcke I. Multilobar unilateral hypoplasia with emphasis on the posterior quadrant and severe epilepsy in children with FCD ILAE Type 1A. Epilepsia 2021; 63:42-60. [PMID: 34741301 DOI: 10.1111/epi.17114] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 10/08/2021] [Accepted: 10/18/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Focal cortical dysplasia (FCD) Type 1 and its three subtypes have yet not been fully characterized at the clinical, anatomopathological, and molecular level (International League Against Epilepsy [ILAE] FCD classification from 2011). We aimed to describe the clinical phenotype of patients with histopathologically confirmed FCD1A obtained from a single epilepsy center between 2002 and 2016. METHODS Medical records were retrieved from the hospital's archive. Results from electroencephalography (EEG) video recordings, neuroimaging, and histopathology were reevaluated. Magnetic resonance imaging (MRI) post-processing was retrospectively performed in nine patients. DNA methylation studies were carried out from archival surgical brain tissue in 11 patients. RESULTS Nineteen children with a histopathological diagnosis of FCD1A were included. The average onset of epilepsy was 0.9 years (range 0.2-10 years). All children had severe cognitive impairment and one third had mild motor deficits, yet fine finger movements were preserved in all patients. All patients had daily seizures, being drug resistant from disease onset. Interictal electroencephalography revealed bilateral multi-regional epileptiform discharges. Interictal status epilepticus was observed in 8 and countless subclinical seizures in 11 patients. Regional continuous irregular slow waves were of higher lateralizing and localizing yield than spikes. Posterior background rhythms were normal in 16 of 19 children. Neuroimaging showed unilateral multilobar hypoplasia and increased T2-FLAIR signals of the white matter in 18 of 19 patients. All children underwent tailored multilobar resections, with seizure freedom achieved in 47% (Engel class I). There was no case with frontal involvement without involvement of the posterior quadrant by MRI and histopathology. DNA methylation profiling distinguished FCD1A samples from all other epilepsy specimens and controls. SIGNIFICANCE We identified a cohort of young children with drug resistance from seizure onset, bad EEG with posterior emphasis, lack of any focal neurological deficits but severe cognitive impairment, subtle hypoplasia of the epileptogenic area on MRI, and histopathologically defined and molecularly confirmed by DNA methylation analysis as FCD ILAE Type 1A.
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Affiliation(s)
- Hans Holthausen
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany
| | - Roland Coras
- Department of Neuropathology, University Hospitals Erlangen, Erlangen, Germany
| | - Yingying Tang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan, China.,Epilepsy Center, Cleveland Clinic, Cleveland, Ohio, USA
| | - Lily Bai
- Epilepsy Center, Cleveland Clinic, Cleveland, Ohio, USA
| | - Irene Wang
- Epilepsy Center, Cleveland Clinic, Cleveland, Ohio, USA
| | - Tom Pieper
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany
| | - Manfred Kudernatsch
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany.,Paracelsus Private Medical University, Salzburg, Austria
| | - Till Hartlieb
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany.,Paracelsus Private Medical University, Salzburg, Austria
| | - Martin Staudt
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany
| | - Peter Winkler
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany
| | - Wiebke Hofer
- Center for Pediatric Neurology, Neurorehabilitation, and Epileptology, Schoen-Clinic, Vogtareuth, Germany
| | - Samir Jabari
- Department of Neuropathology, University Hospitals Erlangen, Erlangen, Germany
| | - Katja Kobow
- Department of Neuropathology, University Hospitals Erlangen, Erlangen, Germany
| | - Ingmar Blumcke
- Department of Neuropathology, University Hospitals Erlangen, Erlangen, Germany.,Epilepsy Center, Cleveland Clinic, Cleveland, Ohio, USA
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11
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Marashly A, Karia S, Zonjy B. Epilepsy Surgery: Special Circumstances. Semin Pediatr Neurol 2021; 39:100921. [PMID: 34620459 DOI: 10.1016/j.spen.2021.100921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 08/16/2021] [Accepted: 08/24/2021] [Indexed: 11/25/2022]
Abstract
Epilepsy surgery has proven to be very effective in treating refractory focal epilepsies in children, producing seizure freedom or partial seizure control well beyond any other medical or dietary therapies. While surgery is mostly utilized in certain clinical phenotypes, either based on the location such as temporal lobe epilepsy, or based on the presence of known epileptogenic lesions such as focal cortical dysplasia, tumors or hemimegalencephaly, there is a growing body of evidence to support the role of surgery in other patients' cohorts that were classically not thought of as surgical candidates. These include patients with rare genetic disorders, electrical status epilepticus in sleep, status epilepticus and the very young patients. Furthermore, epilepsy surgery is not considered as a "last resort" as seizure and cognitive outcomes of surgery are considerably better when done earlier rather than later in relation to the time of onset of epilepsy and age of surgery especially in the context of known focal cortical dysplasia. This article examines the accumulating evidence of the utility of epilepsy surgery in these special circumstances.
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Affiliation(s)
- Ahmad Marashly
- Assistant Professor, University of Washington/Seattle Children's Hospital, Seattle, WA.
| | - Samir Karia
- Associate Professor, Univeristy of Louisville, Luisiville, KY
| | - Bilal Zonjy
- Assistant Professor, University of Washington/Seattle Children's Hospital, Seattle, WA
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12
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Jehi L, Braun K. Does etiology really matter for epilepsy surgery outcome? Brain Pathol 2021; 31:e12965. [PMID: 34196987 PMCID: PMC8412085 DOI: 10.1111/bpa.12965] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 04/01/2021] [Indexed: 12/17/2022] Open
Abstract
Multiple factors influence the outcomes of epilepsy surgery. Prognostic indicators varying from clinical characteristics, imaging findings, ictal, and interictal electrophysiological activity have been linked to surgical outcomes. In this review, we focus on the relatively under‐studied role of the underlying epilepsy histopathology in driving post‐surgical outcomes, specifically focusing on the broad categories of seizure outcomes and cognitive outcomes. For each of these two outcomes of interest, we answer two questions: 1)‐ does etiology matter? and 2)‐ how could it matter? The goal is to review the existing literature on the relationship between etiology and surgical outcomes to provide the best possible judgment as to whether a causal relationship exists between histopathology and the ultimate surgical outcome as an initial step. Then, we delve into the possible mechanisms via which such relationships can be explained. We conclude with a call to action to the epilepsy surgery and histopathology research community to push the mechanistic understanding of the pathology‐outcome interaction and identify actionable knowledge and biomarkers that could inform patient care in a timely fashion. In this review, we focus on the relatively under‐studied role of the underlying epilepsy histopathology in driving post‐surgical outcomes, specifically focusing on the broad categories of seizure outcomes and cognitive outcomes. For each of these two outcomes of interest, we answer two questions: (1) does etiology matter? and (2) how could it matter? We then delve into the mechanisms of these answers.
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Affiliation(s)
- Lara Jehi
- Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA
| | - Kees Braun
- Dept. of Neurology & Neurosurgery, University Medical Center Utrecht, Utrecht University, the Netherlands
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13
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Roth J, Constantini S, Ekstein M, Weiner HL, Tripathi M, Chandra PS, Cossu M, Rizzi M, Bollo RJ, Machado HR, Santos MV, Keating RF, Oluigbo CO, Rutka JT, Drake JM, Jallo GI, Shimony N, Treiber JM, Consales A, Mangano FT, Wisoff JH, Teresa Hidalgo E, Bingaman WE, Gupta A, Erdemir G, Sundar SJ, Benifla M, Shapira V, Lam SK, Fallah A, Maniquis CAB, Tisdall M, Chari A, Cinalli G, Blount JP, Dorfmüller G, Christine Bulteau, Uliel-Sibony S. Epilepsy surgery in infants up to 3 months of age: Safety, feasibility, and outcomes: A multicenter, multinational study. Epilepsia 2021; 62:1897-1906. [PMID: 34128544 DOI: 10.1111/epi.16959] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/18/2021] [Accepted: 05/23/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Drug-resistant epilepsy (DRE) during the first few months of life is challenging and necessitates aggressive treatment, including surgery. Because the most common causes of DRE in infancy are related to extensive developmental anomalies, surgery often entails extensive tissue resections or disconnection. The literature on "ultra-early" epilepsy surgery is sparse, with limited data concerning efficacy controlling the seizures, and safety. The current study's goal is to review the safety and efficacy of ultra-early epilepsy surgery performed before the age of 3 months. METHODS To achieve a large sample size and external validity, a multinational, multicenter retrospective study was performed, focusing on epilepsy surgery for infants younger than 3 months of age. Collected data included epilepsy characteristics, surgical details, epilepsy outcome, and complications. RESULTS Sixty-four patients underwent 69 surgeries before the age of 3 months. The most common pathologies were cortical dysplasia (28), hemimegalencephaly (17), and tubers (5). The most common procedures were hemispheric surgeries (48 procedures). Two cases were intentionally staged, and one was unexpectedly aborted. Nearly all patients received blood products. There were no perioperative deaths and no major unexpected permanent morbidities. Twenty-five percent of patients undergoing hemispheric surgeries developed hydrocephalus. Excellent epilepsy outcome (International League Against Epilepsy [ILAE] grade I) was achieved in 66% of cases over a median follow-up of 41 months (19-104 interquartile range [IQR]). The number of antiseizure medications was significantly reduced (median 2 drugs, 1-3 IQR, p < .0001). Outcome was not significantly associated with the type of surgery (hemispheric or more limited resections). SIGNIFICANCE Epilepsy surgery during the first few months of life is associated with excellent seizure control, and when performed by highly experienced teams, is not associated with more permanent morbidity than surgery in older infants. Thus surgical treatment should not be postponed to treat DRE in very young infants based on their age.
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Affiliation(s)
- Jonathan Roth
- Department of Pediatric Neurosurgery, Dana Children's Hospital, Tel Aviv Medical Center, Tel Aviv University, Tel Aviv, Israel
| | - Shlomi Constantini
- Department of Pediatric Neurosurgery, Dana Children's Hospital, Tel Aviv Medical Center, Tel Aviv University, Tel Aviv, Israel
| | - Margaret Ekstein
- Pediatric Anesthesia Unit, Department of Anesthesia, Tel Aviv Medical Center, Tel Aviv University, Tel Aviv, Israel
| | - Howard L Weiner
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA.,Division of Pediatric Neurosurgery, Department of Surgery, Texas Children's Hospital, Houston, Texas, USA
| | - Manjari Tripathi
- Center of Excellence for Epilepsy and MEG, AIIMS, New Delhi, India
| | | | - Massimo Cossu
- "C. Munari" Centre for Epilepsy Surgery, Niguarda Hospital, Milan, Italy
| | - Michele Rizzi
- "C. Munari" Centre for Epilepsy Surgery, Niguarda Hospital, Milan, Italy
| | - Robert J Bollo
- Division of Pediatric Neurosurgery, University of Utah School of Medicine, Primary Children's Hospital, Salt Lake City, UT, USA
| | - Hélio Rubens Machado
- Pediatric Neurosurgery, Ribeirão Preto Medical School, University of Sao Paulo, Ribeirão Preto, Sao Paulo, Brazil
| | - Marcelo Volpon Santos
- Pediatric Neurosurgery, Ribeirão Preto Medical School, University of Sao Paulo, Ribeirão Preto, Sao Paulo, Brazil
| | - Robert F Keating
- Department of Neurosurgery, Children's National Medical Center, Washington, DC, USA
| | - Chima O Oluigbo
- Department of Neurosurgery, Children's National Medical Center, Washington, DC, USA
| | - James T Rutka
- Department of Surgery, Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - James M Drake
- Department of Surgery, Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - George I Jallo
- Institute for Brain Protection Sciences, Johns Hopkins All Children's Hospital, St. Petersburg, Florida, USA.,Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Nir Shimony
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Neurosurgery, Geisinger Commonwealth School of Medicine, Danville, Pennsylvania, USA
| | - Jeffrey M Treiber
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA.,Division of Pediatric Neurosurgery, Department of Surgery, Texas Children's Hospital, Houston, Texas, USA
| | - Alessandro Consales
- Department of Pediatric Neurosurgery, IRRCS Istituto Giannina Gaslini, Genoa, Italy
| | - Francesco T Mangano
- Department of Pediatric Neurosurgery, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Jeffrey H Wisoff
- Division of Pediatric Neurosurgery, Hassenfeld Children's Hospital, NYU Langone Health, New York, NY, USA
| | - Eveline Teresa Hidalgo
- Division of Pediatric Neurosurgery, Hassenfeld Children's Hospital, NYU Langone Health, New York, NY, USA
| | - William E Bingaman
- Department of Neurological Surgery, Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA
| | - Ajay Gupta
- Department of Neurology, Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA
| | - Gozde Erdemir
- Department of Neurology, Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA
| | - Swetha J Sundar
- Department of Neurological Surgery, Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA
| | - Mony Benifla
- Pediatric Neurosurgery Department, Rambam Health Care Campus, Haifa, Israel
| | - Vladimir Shapira
- Pediatric Neurosurgery Department, Rambam Health Care Campus, Haifa, Israel
| | - Sandi K Lam
- Department of Pediatric Neurosurgery, Ann and Robert H Lurie Children's Hospital of Chicago, Chicago, IL, USA.,Department of Neurosurgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Aria Fallah
- Department of Neurosurgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Cassia A B Maniquis
- Department of Neurosurgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Martin Tisdall
- Department of Neurosurgery, Great Ormond Street Hospital & Developmental Neurosciences, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Aswin Chari
- Department of Neurosurgery, Great Ormond Street Hospital & Developmental Neurosciences, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Giuseppe Cinalli
- Department of Pediatric Neurosurgery, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Jeffrey P Blount
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Alabama at Birmingham, Children's of Alabama, Birmingham, Al, USA
| | - Georg Dorfmüller
- Pediatric Neurosurgery Department, Rothschild Foundation Hospital, Paris, France
| | - Christine Bulteau
- Pediatric Neurosurgery Department, Rothschild Foundation Hospital, Paris, France.,MC2Lab, University of Paris, Boulogne-Billancourt, France
| | - Shimrit Uliel-Sibony
- Pediatric Neurology Unit, Dana Children's Hospital, Tel Aviv Medical Center, Tel Aviv University, Tel Aviv, Israel
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14
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Rácz A, Becker AJ, Quesada CM, Borger V, Vatter H, Surges R, Elger CE. Post-Surgical Outcome and Its Determining Factors in Patients Operated on With Focal Cortical Dysplasia Type II-A Retrospective Monocenter Study. Front Neurol 2021; 12:666056. [PMID: 34177771 PMCID: PMC8220082 DOI: 10.3389/fneur.2021.666056] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 04/19/2021] [Indexed: 11/27/2022] Open
Abstract
Purpose: Focal cortical dysplasias (FCDs) are a frequent cause of drug-resistant focal epilepsies. These lesions are in many cases amenable to epilepsy surgery. We examined 12-month and long-term post-surgical outcomes and its predictors including positive family history of epilepsy. Methods: Twelve-month and long-term outcomes regarding seizure control after epilepsy surgery in patients operated on with FCD type II between 2002 and 2019 in the Epilepsy Center of Bonn were evaluated based on patient records and telephone interviews. Results: Overall, 102 patients fulfilled the inclusion criteria. Seventy-one percent of patients at 12 months of follow-up (FU) and 54% of patients at the last available FU (63 ± 5.00 months, median 46.5 months) achieved complete seizure freedom (Engel class IA), and 84 and 69% of patients, respectively, displayed Engel class I outcome. From the examined variables [histopathology: FCD IIA vs. IIB, lobar lesion location: frontal vs. non-frontal, family history for epilepsy, focal to bilateral tonic–clonic seizures (FTBTCS) in case history, completeness of resection, age at epilepsy onset, age at surgery, duration of epilepsy], outcomes at 12 months were determined by interactions of age at onset, duration of epilepsy, age at surgery, extent of resection, and lesion location. Long-term post-surgical outcome was primarily influenced by the extent of resection and history of FTBTCS. Positive family history for epilepsy had a marginal influence on long-term outcomes only. Conclusion: Resective epilepsy surgery in patients with FCD II yields very good outcomes both at 12-month and long-term follow-ups. Complete lesion resection and the absence of FTBTCS prior to surgery are associated with a better outcome.
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Affiliation(s)
- Attila Rácz
- Department of Epileptology, University Hospital Bonn, Bonn, Germany
| | - Albert J Becker
- Department of Neuropathology, University Hospital Bonn, Bonn, Germany
| | - Carlos M Quesada
- Department of Epileptology, University Hospital Bonn, Bonn, Germany
| | - Valeri Borger
- Department of Neurosurgery, University Hospital Bonn, Bonn, Germany
| | - Hartmut Vatter
- Department of Neurosurgery, University Hospital Bonn, Bonn, Germany
| | - Rainer Surges
- Department of Epileptology, University Hospital Bonn, Bonn, Germany
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15
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de Knegt VE, Hoei-Hansen CE, Knudsen M, Jakobsen AV, Mûller E, Thomsen KM, Jespersen B, Uldall PV, Børresen ML. Increase in cognitive function is seen in many single-operated pediatric patients after epilepsy surgery. Seizure 2020; 81:254-262. [PMID: 32911236 DOI: 10.1016/j.seizure.2020.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 08/02/2020] [Accepted: 08/04/2020] [Indexed: 02/08/2023] Open
Abstract
PURPOSE The recurrent seizures of pediatric drug-resistant epilepsy (DRE) are known to impair brain development and can lead to a loss in cognitive functioning. Surgery is increasingly being used to treat children with DRE. This study investigates the pre- and postoperative cognitive function in a pediatric epilepsy surgery cohort as well as predictive determinants of change in intelligence quotient (IQ) following surgery. METHODS A consecutive series of 91 Danish children who underwent focal resective epilepsy surgery between January 1996 and December 2016 were included. All underwent preoperative cognitive evaluation and were reevaluated at 1-year and/or 2-year follow-up. Single-operated and multi-operated patients were examined separately. RESULTS 79 of 91 patients were single-operated. Single-operated patients received less anti-epileptic drugs (AED) and experienced a decrease in seizure frequency postoperatively, p < 0.001. IQ increased postoperatively (IQ change ± standard deviation: 3.3 ± 14.0), p < 0.05. High preoperative seizure frequency was a significant predictor for decreased IQ, p < 0.01. Multi-operated patients did not experience a reduction in AED treatment. Surgery and continued AED treatment did, however, result in significantly better seizure control, p < 0.01. IQ remained unchanged in multi-operated patients. CONCLUSION Epilepsy surgery allowed for IQ gains in single-operated patients. Preoperative seizure frequency was a significant predictor of IQ change following surgery. Interactions between other, not included, possible predictors remain to be examined. Single-operated patients had the best cognitive outcome. The inclusion of a non-surgical control group is needed to assess the extent of the beneficial effects of surgery on cognitive ability.
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Affiliation(s)
| | | | - Marianne Knudsen
- Department of Pediatrics and Adolescent Medicine, University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Anne Vagner Jakobsen
- Department of Neuropediatrics, The Danish Epilepsy Center, Filadelfia, Dianalund, Denmark
| | - Elisabeth Mûller
- Department of Neuropediatrics, The Danish Epilepsy Center, Filadelfia, Dianalund, Denmark
| | - Katrine Moe Thomsen
- Department of Pediatrics and Adolescent Medicine, University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Bo Jespersen
- Department of Neurosurgery, University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Peter Vilhelm Uldall
- Department of Pediatrics and Adolescent Medicine, University Hospital Rigshospitalet, Copenhagen, Denmark; Department of Neuropediatrics, The Danish Epilepsy Center, Filadelfia, Dianalund, Denmark
| | - Malene Landbo Børresen
- Department of Pediatrics and Adolescent Medicine, University Hospital Rigshospitalet, Copenhagen, Denmark.
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16
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Chari A, Thornton RC, Tisdall MM, Scott RC. Microelectrode recordings in human epilepsy: a case for clinical translation. Brain Commun 2020; 2:fcaa082. [PMID: 32954332 PMCID: PMC7472902 DOI: 10.1093/braincomms/fcaa082] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 04/21/2020] [Accepted: 04/28/2020] [Indexed: 12/25/2022] Open
Abstract
With their 'all-or-none' action potential responses, single neurons (or units) are accepted as the basic computational unit of the brain. There is extensive animal literature to support the mechanistic importance of studying neuronal firing as a way to understand neuronal microcircuits and brain function. Although most studies have emphasized physiology, there is increasing recognition that studying single units provides novel insight into system-level mechanisms of disease. Microelectrode recordings are becoming more common in humans, paralleling the increasing use of intracranial electroencephalography recordings in the context of presurgical evaluation in focal epilepsy. In addition to single-unit data, microelectrode recordings also record local field potentials and high-frequency oscillations, some of which may be different to that recorded by clinical macroelectrodes. However, microelectrodes are being used almost exclusively in research contexts and there are currently no indications for incorporating microelectrode recordings into routine clinical care. In this review, we summarize the lessons learnt from 65 years of microelectrode recordings in human epilepsy patients. We cover the electrode constructs that can be utilized, principles of how to record and process microelectrode data and insights into ictal dynamics, interictal dynamics and cognition. We end with a critique on the possibilities of incorporating single-unit recordings into clinical care, with a focus on potential clinical indications, each with their specific evidence base and challenges.
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Affiliation(s)
- Aswin Chari
- Developmental Neurosciences, Great Ormond Street Institute of Child Health, University College London, London WC1N 1EH, UK
- Department of Neurosurgery, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Rachel C Thornton
- Department of Clinical Neurophysiology, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Martin M Tisdall
- Developmental Neurosciences, Great Ormond Street Institute of Child Health, University College London, London WC1N 1EH, UK
- Department of Neurosurgery, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Rodney C Scott
- Developmental Neurosciences, Great Ormond Street Institute of Child Health, University College London, London WC1N 1EH, UK
- Department of Neurological Sciences, University of Vermont, Burlington, VT 05405, USA
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Effects of unilateral cortical resection of the visual cortex on bilateral human white matter. Neuroimage 2019; 207:116345. [PMID: 31712165 PMCID: PMC7016507 DOI: 10.1016/j.neuroimage.2019.116345] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/19/2019] [Accepted: 11/08/2019] [Indexed: 01/21/2023] Open
Abstract
Children with unilateral resections of ventral occipito-temporal cortex (VOTC) typically do not evince visual perceptual impairments, even when relatively large swathes of VOTC are resected. In search of possible explanations for this behavioral competence, we evaluated white matter microstructure and connectivity in eight pediatric epilepsy patients following unilateral cortical resection and 15 age-matched controls. To uncover both local and broader resection-induced effects, we analyzed tractography data using two complementary approaches. First, the microstructural properties were measured in the inferior longitudinal and the inferior fronto-occipital fasciculi, the major VOTC association tracts. Group differences were only evident in the ipsilesional, and not in the contralesional, hemisphere, and single-subject analyses revealed that these differences were limited to the site of the resection. Second, graph theory was used to characterize the connectivity of the contralesional occipito-temporal regions. There were no changes to the network properties in patients with left VOTC resections nor in patients with resections outside the VOTC, but altered network efficiency was observed in two cases with right VOTC resections. These results suggest that, in many, although perhaps not all, cases of unilateral VOTC resections in childhood, the white matter profile in the preserved contralesional hemisphere along with residual neural activity might be sufficient for normal visual perception.
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