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Wu S, Issa NP, Rose SL, Haider HA, Nordli DR, Towle VL, Warnke PC, Tao JX. Depth versus surface: A critical review of subdural and depth electrodes in intracranial electroencephalographic studies. Epilepsia 2024; 65:1868-1878. [PMID: 38722693 DOI: 10.1111/epi.18002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/05/2024] [Accepted: 04/24/2024] [Indexed: 07/17/2024]
Abstract
Intracranial electroencephalographic (IEEG) recording, using subdural electrodes (SDEs) and stereoelectroencephalography (SEEG), plays a pivotal role in localizing the epileptogenic zone (EZ). SDEs, employed for superficial cortical seizure foci localization, provide information on two-dimensional seizure onset and propagation. In contrast, SEEG, with its three-dimensional sampling, allows exploration of deep brain structures, sulcal folds, and bihemispheric networks. SEEG offers the advantages of fewer complications, better tolerability, and coverage of sulci. Although both modalities allow electrical stimulation, SDE mapping can tessellate cortical gyri, providing the opportunity for a tailored resection. With SEEG, both superficial gyri and deep sulci can be stimulated, and there is a lower risk of afterdischarges and stimulation-induced seizures. Most systematic reviews and meta-analyses have addressed the comparative effectiveness of SDEs and SEEG in localizing the EZ and achieving seizure freedom, although discrepancies persist in the literature. The combination of SDEs and SEEG could potentially overcome the limitations inherent to each technique individually, better delineating seizure foci. This review describes the strengths and limitations of SDE and SEEG recordings, highlighting their unique indications in seizure localization, as evidenced by recent publications. Addressing controversies in the perceived usefulness of the two techniques offers insights that can aid in selecting the most suitable IEEG in clinical practice.
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Affiliation(s)
- Shasha Wu
- Department of Neurology, University of Chicago, Chicago, Illinois, USA
| | - Naoum P Issa
- Department of Neurology, University of Chicago, Chicago, Illinois, USA
| | - Sandra L Rose
- Department of Neurology, University of Chicago, Chicago, Illinois, USA
| | - Hiba A Haider
- Department of Neurology, University of Chicago, Chicago, Illinois, USA
| | - Douglas R Nordli
- Department of Pediatrics, University of Chicago, Chicago, Illinois, USA
| | - Vernon L Towle
- Department of Neurology, University of Chicago, Chicago, Illinois, USA
| | - Peter C Warnke
- Department of Neurological Surgery, University of Chicago, Chicago, Illinois, USA
| | - James X Tao
- Department of Neurology, University of Chicago, Chicago, Illinois, USA
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Kheder A. Escaping the Procrustean Bed: A Perspective on Pediatric Stereoelectroencephalography. J Clin Neurophysiol 2024; 41:410-414. [PMID: 38935654 DOI: 10.1097/wnp.0000000000001047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024] Open
Abstract
SUMMARY Stereoelectroencephalography is an established, hypothesis-driven method for investigating refractory epilepsy. There are special considerations and some limitations that apply to children who undergo stereoelectroencephalography. A key principle in stereoelectroencephalography is taking an individualized approach to investigating refractory epilepsy. A crucial factor for success in a personalized pediatric epilepsy surgery is understanding some of the fundamental and unique aspects of it, including, but not limited to, diverse etiology, epilepsy syndromes, maturation, and age-related characteristics as well as neural plasticity. Such features are reflected in the ontogeny of semiology and electrophysiology. In addition, special considerations are taken into account during cortical stimulation in children. Stereoelectroencephalography can guide a tailored surgical intervention where it is sufficient to render the patient seizure-free but it also lessens collateral damage with a minimum or no functional deficit. Epilepsy surgery outcomes remain stagnant despite advances in noninvasive testing modalities. A stereoelectroencephalography "way of thinking" and guided mentorship may influence outcomes positively.
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Affiliation(s)
- Ammar Kheder
- Department of Neurology, Emory University School of Medicine, Atlanta, Georgia, U.S.A
- Children's Healthcare of Atlanta, Atlanta, Georgia, U.S.A.; and
- Emory and Children's Pediatric Institute, 2015 Uppergate Drive, Atlanta, Georgia, U.S.A
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3
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Muh CR, Dorilio JR, Beaudreault CP, McGoldrick PE, Pisapia JM, Wolf SM. Feasibility and safety of stereoelectroencephalography in young children. Childs Nerv Syst 2024; 40:1331-1337. [PMID: 38451299 DOI: 10.1007/s00381-024-06335-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 02/23/2024] [Indexed: 03/08/2024]
Abstract
PURPOSE Stereoelectroencephalography (SEEG) is a diagnostic surgery that implants electrodes to identify areas of epileptic onset in patients with drug-resistant epilepsy (DRE). SEEG is effective in identifying the epileptic zone; however, placement of electrodes in very young children has been considered contraindicated due to skull thinness. The goal of this study was to evaluate if SEEG is safe and accurate in young children with thin skulls. METHODS Four children under the age of two years old with DRE underwent SEEG to locate the region of seizure onset. Presurgical planning and placement of electrodes were performed using ROSA One Brain. Preoperative electrode plans were merged with postoperative CT scans to determine accuracy. Euclidean distance between the planned and actual trajectories was calculated using a 3D coordinate system at both the entry and target points for each electrode. RESULTS Sixty-three electrodes were placed among four patients. Mean skull thickness at electrode entry sites was 2.34 mm. The mean difference between the planned and actual entry points was 1.12 mm, and the mean difference between the planned and actual target points was 1.73 mm. No significant correlation was observed between planned and actual target points and skull thickness (Pearson R = - 0.170). No perioperative or postoperative complications were observed. CONCLUSIONS This study demonstrates that SEEG can be safe and accurate in children under two years of age despite thin skulls. SEEG should be considered for young children with DRE, and age and skull thickness are not definite contraindications to the surgery.
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Affiliation(s)
- Carrie R Muh
- Department of Neurosurgery and Department of Pediatrics, Westchester Medical Center, 100 Woods Road, Taylor Pavilion E135, Valhalla, NY, 10595, USA.
- Department of Neurosurgery, New York Medical College, Valhalla, NY, 10595, USA.
| | | | | | - Patricia E McGoldrick
- Department of Pediatric Neurology, Boston Children's Health Physicians, Hawthorne, NY, USA
| | - Jared M Pisapia
- Department of Neurosurgery and Department of Pediatrics, Westchester Medical Center, 100 Woods Road, Taylor Pavilion E135, Valhalla, NY, 10595, USA
- Department of Neurosurgery, New York Medical College, Valhalla, NY, 10595, USA
| | - Steven M Wolf
- Department of Pediatric Neurology, Boston Children's Health Physicians, Hawthorne, NY, USA
- Department of Neurology, New York Medical College, Valhalla, NY, USA
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Kaewborisutsakul A, Chernov M, Yokosako S, Kubota Y. Usefulness of Robotic Stereotactic Assistance (ROSA ®) Device for Stereoelectroencephalography Electrode Implantation: A Systematic Review and Meta-analysis. Neurol Med Chir (Tokyo) 2024; 64:71-86. [PMID: 38220166 PMCID: PMC10918457 DOI: 10.2176/jns-nmc.2023-0119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 10/17/2023] [Indexed: 01/16/2024] Open
Abstract
The aim of this study was to systematically review and meta-analyze the efficiency and safety of using the Robotic Stereotactic Assistance (ROSA®) device (Zimmer Biomet; Warsaw, IN, USA) for stereoelectroencephalography (SEEG) electrode implantation in patients with drug-resistant epilepsy. Based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, a literature search was carried out. Overall, 855 nonduplicate relevant articles were determined, and 15 of them were selected for analysis. The benefits of the ROSA® device use in terms of electrode placement accuracy, as well as operative time length, perioperative complications, and seizure outcomes, were evaluated. Studies that were included reported on a total of 11,257 SEEG electrode implantations. The limited number of comparative studies hindered the comprehensive evaluation of the electrode implantation accuracy. Compared with frame-based or navigation-assisted techniques, ROSA®-assisted SEEG electrode implantation provided significant benefits for reduction of both overall operative time (mean difference [MD], -63.45 min; 95% confidence interval [CI] from -88.73 to -38.17 min; P < 0.00001) and operative time per implanted electrode (MD, -8.79 min; 95% CI from -14.37 to -3.21 min; P = 0.002). No significant differences existed in perioperative complications and seizure outcomes after the application of the ROSA® device and other techniques for electrode implantation. To conclude, the available evidence shows that the ROSA® device is an effective and safe surgical tool for trajectory-guided SEEG electrode implantation in patients with drug-resistant epilepsy, offering benefits for saving operative time and neither increasing the risk of perioperative complications nor negatively impacting seizure outcomes.
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Affiliation(s)
- Anukoon Kaewborisutsakul
- Neurological Surgery Unit, Division of Surgery, Faculty of Medicine, Prince of Songkla University
- Department of Neurosurgery, Tokyo Women's Medical University Adachi Medical Center
| | - Mikhail Chernov
- Department of Neurosurgery, Tokyo Women's Medical University Adachi Medical Center
| | - Suguru Yokosako
- Department of Neurosurgery, Tokyo Women's Medical University Adachi Medical Center
| | - Yuichi Kubota
- Department of Neurosurgery, Tokyo Women's Medical University Adachi Medical Center
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Frauscher B, Mansilla D, Abdallah C, Astner-Rohracher A, Beniczky S, Brazdil M, Gnatkovsky V, Jacobs J, Kalamangalam G, Perucca P, Ryvlin P, Schuele S, Tao J, Wang Y, Zijlmans M, McGonigal A. Learn how to interpret and use intracranial EEG findings. Epileptic Disord 2024; 26:1-59. [PMID: 38116690 DOI: 10.1002/epd2.20190] [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: 07/18/2023] [Revised: 10/21/2023] [Accepted: 11/29/2023] [Indexed: 12/21/2023]
Abstract
Epilepsy surgery is the therapy of choice for many patients with drug-resistant focal epilepsy. Recognizing and describing ictal and interictal patterns with intracranial electroencephalography (EEG) recordings is important in order to most efficiently leverage advantages of this technique to accurately delineate the seizure-onset zone before undergoing surgery. In this seminar in epileptology, we address learning objective "1.4.11 Recognize and describe ictal and interictal patterns with intracranial recordings" of the International League against Epilepsy curriculum for epileptologists. We will review principal considerations of the implantation planning, summarize the literature for the most relevant ictal and interictal EEG patterns within and beyond the Berger frequency spectrum, review invasive stimulation for seizure and functional mapping, discuss caveats in the interpretation of intracranial EEG findings, provide an overview on special considerations in children and in subdural grids/strips, and review available quantitative/signal analysis approaches. To be as practically oriented as possible, we will provide a mini atlas of the most frequent EEG patterns, highlight pearls for its not infrequently challenging interpretation, and conclude with two illustrative case examples. This article shall serve as a useful learning resource for trainees in clinical neurophysiology/epileptology by providing a basic understanding on the concepts of invasive intracranial EEG.
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Affiliation(s)
- B Frauscher
- Department of Neurology, Duke University Medical Center and Department of Biomedical Engineering, Duke Pratt School of Engineering, Durham, North Carolina, USA
- Analytical Neurophysiology Lab, Montreal Neurological Institute and Hospital, Montreal, Québec, Canada
| | - D Mansilla
- Analytical Neurophysiology Lab, Montreal Neurological Institute and Hospital, Montreal, Québec, Canada
- Neurophysiology Unit, Institute of Neurosurgery Dr. Asenjo, Santiago, Chile
| | - C Abdallah
- Analytical Neurophysiology Lab, Montreal Neurological Institute and Hospital, Montreal, Québec, Canada
| | - A Astner-Rohracher
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - S Beniczky
- Danish Epilepsy Centre, Dianalund, Denmark
- Aarhus University, Aarhus, Denmark
| | - M Brazdil
- Brno Epilepsy Center, Department of Neurology, St. Anne's University Hospital and Medical Faculty of Masaryk University, Member of the ERN-EpiCARE, Brno, Czechia
- Behavioral and Social Neuroscience Research Group, Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - V Gnatkovsky
- Department of Epileptology, University Hospital Bonn, Bonn, Germany
| | - J Jacobs
- Department of Paediatrics and Department of Neuroscience, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - G Kalamangalam
- Department of Neurology, University of Florida, Gainesville, Florida, USA
- Wilder Center for Epilepsy Research, University of Florida, Gainesville, Florida, USA
| | - P Perucca
- Epilepsy Research Centre, Department of Medicine (Austin Health), University of Melbourne, Melbourne, Victoria, Australia
- Bladin-Berkovic Comprehensive Epilepsy Program, Department of Neurology, Austin Health, Melbourne, Victoria, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Department of Neurology, Alfred Health, Melbourne, Victoria, Australia
- Department of Neurology, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - P Ryvlin
- Department of Clinical Neurosciences, CHUV, Lausanne University Hospital, Lausanne, Switzerland
| | - S Schuele
- Department of Neurology, Feinberg School of Medicine, Northwestern Memorial Hospital, Chicago, Illinois, USA
| | - J Tao
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Y Wang
- Department of Epileptology, University Hospital Bonn, Bonn, Germany
- Wilder Center for Epilepsy Research, University of Florida, Gainesville, Florida, USA
| | - M Zijlmans
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, the Netherlands
- Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, The Netherlands
| | - A McGonigal
- Department of Neurosciences, Mater Misericordiae Hospital, Brisbane, Queensland, Australia
- Mater Research Institute, Faculty of Medicine, University of Queensland, St Lucia, Queensland, Australia
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Lu R, Wang M, Zhang Y, Li H, Zhou Y, Wang Y, Zhao R. Safety, Accuracy, and Efficacy of Robot-Assisted Stereo Electroencephalography in Children of Different Ages. Neurosurgery 2024; 95:00006123-990000000-01038. [PMID: 38299855 PMCID: PMC11155594 DOI: 10.1227/neu.0000000000002853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 12/13/2023] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Aimed to investigate the safety, accuracy, and efficacy of stereo electroencephalography (SEEG) in children of various ages, with particular emphasis on those younger than 3 years. There is limited guidance regarding whether SEEG can conducted on very young children. METHODS This retrospective study was conducted between July 2018 and August 2022. It involved 88 patients who underwent 99 robot-assisted SEEG procedures at our center. The patients were categorized into 3 groups based on their age at the time of the robot-assisted SEEG procedures: group 1 (3 years and younger, n = 28), group 2 (age 3-6 years, n = 27), and group 3 (older than 6 years, n = 44). Clinical data, SEEG demographics, complications, and seizure outcomes were analyzed. RESULTS A total of 675 electrodes were implanted, with an average of 6.82 ± 3.47 (2.00-16.00) electrodes per patient (P = .052). The average target point error for the 675 electrodes was 1.93 ± 1.11 mm, and the average entry point error was 1.30 ± 0.97 mm (P = .536 and P = .549, respectively). The overall percentage of complications was 6.06% (P = .879). No severe or long-term neurologic impairment was observed. Of the total 99 procedures included in this study, 78 were admitted for epilepsy surgery for the first time, while 9 patients were treated twice and 1 patient was treated 3 times. There were 21 radiofrequency thermocoagulation and 78 second-stage resective procedures performed after SEEG. There was no statistically significant difference in Engel class I outcomes among the patients who underwent SEEG in the 3 age groups (P = .621). CONCLUSION Robot-assisted SEEG were demonstrated to be safe, accurate, and efficient across different age groups of children. This technique is suitable for children younger than 3 years who have indications for SEEG placement.
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Affiliation(s)
- Rongrong Lu
- Department of Neurosurgery, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China
| | - Min Wang
- Department of Neurosurgery, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China
| | - Yi Zhang
- Department of Neurosurgery, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China
| | - Hao Li
- Department of Neurosurgery, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China
| | - Yuanfeng Zhou
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China
| | - Yi Wang
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China
| | - Rui Zhao
- Department of Neurosurgery, Children's Hospital of Shanghai, Shanghai, People's Republic of China
- Department of Neurosurgery, Hainan Women and Children's Medical Center, Haikou, People's Republic of China
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7
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McGinley C, Teti S, Hofmann K, Schreiber JM, Cohen NT, Gaillard WD, Oluigbo CO. Seizure Control Outcomes following Resection of Cortical Dysplasia in Patients with DEPDC5 Variants: A Systematic Review and Individual Patient Data Analysis. Neuropediatrics 2024; 55:1-8. [PMID: 37984419 DOI: 10.1055/a-2213-8584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
There is insufficient evidence regarding the efficacy of epilepsy surgery in patients with pharmacoresistant focal epilepsy and coexistent DEPDC5 (dishevelled EGL-10 and pleckstrin domain-containing protein 5) pathogenic (P), likely pathogenic (LP), or variance of unknown significance (VUS) variants. To conduct a systematic review on the literature regarding the use and efficacy of epilepsy surgery as an intervention for patients with DEPDC5 variants who have pharmacoresistant epilepsy. A systematic review of the current literature published regarding the outcomes of epilepsy surgery for patients with DEPDC5 variants was conducted. Demographics and individual patient data were recorded and analyzed. Subsequent statistical analysis was performed to assess significance of the findings. A total of eight articles comprising 44 DEPDC5 patients with genetic variants undergoing surgery were included in this study. The articles primarily originated in high-income countries (5/8, 62.5%). The average age of the subjects was 10.06 ± 9.41 years old at the time of study. The most common form of epilepsy surgery was focal resection (38/44, 86.4%). Thirty-seven of the 40 patients (37/40, 92.5%) with reported seizure frequency results had improvement. Twenty-nine out of 38 patients (29/38, 78.4%) undergoing focal resection achieved Engel Score I postoperatively, and two out of four patients achieved International League Against Epilepsy I (50%). Epilepsy surgery is effective in patients with pharmacoresistant focal epilepsy and coexistent DEPDC5 P, LP, or VUS variants.
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Affiliation(s)
- Christopher McGinley
- College of Medicine, Howard University College of Medicine, Washington, District of Columbia, United States
| | - Saige Teti
- Division of Neurosurgery, Children's National Hospital, Washington, District of Columbia, United States
| | - Katherine Hofmann
- Division of Neurosurgery, Children's National Hospital, Washington, District of Columbia, United States
| | - John M Schreiber
- Division of Neurology, Children's National Hospital, Washington, District of Columbia, United States
| | - Nathan T Cohen
- Division of Neurology, Children's National Hospital, Washington, District of Columbia, United States
| | - William D Gaillard
- Division of Neurosurgery, Children's National Hospital, Washington, District of Columbia, United States
| | - Chima O Oluigbo
- Division of Neurosurgery, Children's National Hospital, Washington, District of Columbia, United States
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8
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Ghatan S. Pediatric Neurostimulation and Practice Evolution. Neurosurg Clin N Am 2024; 35:1-15. [PMID: 38000833 DOI: 10.1016/j.nec.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
Since the late nineteenth century, the prevailing view of epilepsy surgery has been to identify a seizure focus in a medically refractory patient and eradicate it. Sadly, only a select number of the many who suffer from uncontrolled seizures benefit from this approach. With the development of safe, efficient stereotactic methods and targeted surgical therapies that can affect deep structures and modulate broad networks in diverse disorders, epilepsy surgery in children has undergone a paradigmatic evolutionary change. With modern diagnostic techniques such as stereo electroencephalography combined with closed loop neuromodulatory systems, pediatric epilepsy surgery can reach a much broader population of underserved patients.
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Affiliation(s)
- Saadi Ghatan
- Neurological Surgery Icahn School of Medicine at Mt Sinai, New York, NY 10128, USA.
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Nanda P, Richardson RM. Evolution of Stereo-Electroencephalography at Massachusetts General Hospital. Neurosurg Clin N Am 2024; 35:87-94. [PMID: 38000845 DOI: 10.1016/j.nec.2023.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
The practice of invasive monitoring for presurgical epilepsy workup has evolved at Massachusetts General Hospital (MGH) in parallel to the evolution in the field's understanding of epilepsy as a network disorder. Implantations have shifted from an emphasis on singularly finding single foci for the purpose of resection to a network-hypothesis-driven approach aiming to delineate patients' seizure networks with the goal of developing surgical interventions that disrupt critical nodes of these networks. Here, the authors review all invasive monitoring cases at MGH from April 2016 through June 2023 to describe how this paradigm shift has taken form.
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Affiliation(s)
- Pranav Nanda
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Neurosurgery, Harvard Medical School, Boston, MA 02115, USA.
| | - R Mark Richardson
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Neurosurgery, Harvard Medical School, Boston, MA 02115, USA
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10
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Winslow NK, Olson EA, Bach SE, Maldonado AL. Neuropathologic changes associated with stereoelectroencephalography depth electrode placement. J Neurosurg Sci 2023; 67:631-637. [PMID: 35380201 DOI: 10.23736/s0390-5616.22.05616-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The aim of this study was to detail the neuropathologic changes resulting from the surgical placement of stereoelectroencephalography (SEEG) leads in an initial small group of epilepsy cases and to raise awareness of this iatrogenic pathology, especially to those medical providers who specialize in the care of epilepsy patients. METHODS Five consecutive patients who underwent epilepsy resection surgery following SEEG monitoring at OSF Saint Francis Medical Center were included in our report. Resection specimens were examined grossly and entirely submitted for microscopic evaluation by a neuropathologist. Seizure-related pathologies, as well as histologic changes related to SEEG electrode placement, were documented. RESULTS The patient cohort included two females and three males, with an age range of 9 to 47 years. Neuropathologic examination revealed one or more seizure-related pathologies in each patient's resection specimen. In addition, all brain resection specimens showed multiple microinfarcts, which appeared to correlate with the placement and size of SEEG electrodes. Patchy leptomeningeal chronic inflammation was also seen in most cases. CONCLUSIONS SEEG electrode placement is an effective procedure for determining epileptogenic regions and guiding subsequent resection surgeries in medically refractory epilepsy. Multiple microinfarcts and chronic inflammation are commonly seen in brain resection specimens following SEEG electrode insertion, but studies detailing these iatrogenic histopathologic changes are lacking. The clinical significance and long-term implications of multiple small foci of electrode-induced injury that remain in the patient's brain after resection of the epileptogenic focus are unknown and may provide a welcome area for future study.
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Affiliation(s)
- Nolan K Winslow
- Department of Neurosurgery, OSF Saint Francis Medical Center, Peoria, IL, USA -
| | - Elsa A Olson
- College of Medicine, University of Illinois, Peoria, IL, USA
| | - Sarah E Bach
- Department of Pathology, OSF Saint Francis Medical Center, Peoria, IL, USA
| | - Andres L Maldonado
- Department of Neurosurgery, OSF Saint Francis Medical Center, Peoria, IL, USA
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11
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Yin F, Yan X, Gao R, Ren Z, Yu T, Zhao Z, Zhang G. Radiomics features from 3D-MPRAGE imaging can differentiate temporal-plus epilepsy from temporal lobe epilepsy. Epileptic Disord 2023; 25:681-689. [PMID: 37349866 DOI: 10.1002/epd2.20092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 05/15/2023] [Accepted: 06/21/2023] [Indexed: 06/24/2023]
Abstract
OBJECTIVE This study aimed to differentiate temporal-plus epilepsy (TPE) from temporal lobe epilepsy (TLE) using extraction of radiomics features from three-dimensional magnetization-prepared rapid acquisition gradient echo (3D-MPRAGE) imaging data. METHODS Data from patients with TLE or TPE who underwent epilepsy surgery between January 2019 and January 2021 were retrospectively analyzed. Thirty-three regions of interest in the affected hemisphere of each patient were defined on 3D-MPRAGE images. A total of 3531 image features were extracted from each patient. Four feature selection methods and 10 machine learning algorithms were used to build 40 differentiation models. Model performance was evaluated using receiver operating characteristic analysis. RESULTS Eighty-two patients were included for analysis, 47 with TLE and 35 with TPE. The model combining logistic regression and the relief selection method had the best performance (area under the receiver operating characteristic curve, .779; accuracy, .875; sensitivity, .800; specificity, .929; positive predictive value, .889; negative predictive value, .867). SIGNIFICANCE Radiomics analysis can differentiate TPE from TLE. The logistic regression classifier trained with radiomics features extracted from 3D-MPRAGE images had the highest accuracy and best performance.
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Affiliation(s)
- Fangzhao Yin
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Tianjin Huanhu Hospital, Tianjin, China
| | - Xiaoming Yan
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Runshi Gao
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhiwei Ren
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Tao Yu
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhuoling Zhao
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Guojun Zhang
- Functional Neurosurgery Department, Beijing Children's Hospital, Capital Medical University, Beijing, China
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12
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Gong M, Li Y, Chen Q, Ma K, Tan B, Qin G, Yi L, Ji X, Mao Y. Drug-resistant epilepsy in children with hemophilia: how can we do it surgically? Br J Neurosurg 2023; 37:1124-1130. [PMID: 35174742 DOI: 10.1080/02688697.2022.2039374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 02/02/2022] [Indexed: 11/02/2022]
Abstract
BACKGROUND Drug-resistant epilepsy can occur in patients with intracranial hemorrhage (ICH) caused by hemophilia, there is a paucity of literature reporting the surgical treatment of these patients because of the high risk of bleeding and comprehensive management such as factor replacement during the period of perioperation. METHODS The data of 216 children with drug-resistant epilepsy who underwent surgically treatment in the Pediatric Epilepsy Center of the Capital Institute of Paediatrics were retrospectively reviewed. Seizure response and procedure complications were evaluated. Two cases children with hemophilia underwent surgical treatment at 29 months (case 1) and 6 years of age (case 2) were identified and followed up. RESULTS Both children have achieved seizure free without complications such as bleeding or infection after 28 months (case 1) and 21 months (case 2) follow-up. CONCLUSION For children with drug-resistant epilepsy associated with hemophilia, surgery that meets certain conditions can improve the prognosis safely and effectively.
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Affiliation(s)
- Mingkun Gong
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Yunlin Li
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Qian Chen
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Kangping Ma
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Bojing Tan
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Guangbiao Qin
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Linhua Yi
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Xinna Ji
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
| | - Yingying Mao
- Department of Neurosurgery or Neurology, Capital Institute of Paediatrics, Beijing, China
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13
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Williams A, Ordaz JD, Budnick H, Desai VR, Tailor J, Raskin JS. Accuracy of Depth Electrodes is Not Time-Dependent in Robot-Assisted Stereoelectroencephalography in a Pediatric Population. Oper Neurosurg (Hagerstown) 2023; 25:269-277. [PMID: 37219595 DOI: 10.1227/ons.0000000000000764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/21/2023] [Indexed: 05/24/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Robot-assisted stereoelectroencephalography (sEEG) is steadily supplanting traditional frameless and frame-based modalities for minimally invasive depth electrode placement in epilepsy workup. Accuracy rates similar to gold-standard frame-based techniques have been achieved, with improved operative efficiency. Limitations in cranial fixation and placement of trajectories in pediatric patients are believed to contribute to a time-dependent accumulation of stereotactic error. Thus, we aim to study the impact of time as a marker of cumulative stereotactic error during robotic sEEG. METHODS All patients between October 2018 and June 2022 who underwent robotic sEEG were included. Radial errors at entry and target points as well as depth and Euclidean distance errors were collected for each electrode, excluding those with errors over 10 mm. Target point errors were standardized by planned trajectory length. ANOVA and error rates over time were analyzed using GraphPad Prism 9. RESULTS Forty-four patients met inclusion criteria for a total of 539 trajectories. Number of electrodes placed ranged from 6 to 22. Average root mean squared error was 0.45 ± 0.12 mm. Average entry, target, depth, and Euclidean distance errors were 1.12 ± 0.41 mm, 1.46 ± 0.44 mm, -1.06 ± 1.43 mm, and 3.01 ± 0.71 mm, respectively. There was no significant increased error with each sequential electrode placed (entry error P -value = .54, target error P -value = .13, depth error P -value = .22, Euclidean distance P -value = .27). CONCLUSION No decremental accuracy over time was observed. This may be secondary to our workflow which prioritizes oblique and longer trajectories first and then into less error-prone trajectories. Further study on the effect of level of training may reveal a novel difference in error rates.
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Affiliation(s)
- Ari Williams
- Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Josue D Ordaz
- Department of Neurological Surgery, Section of Pediatric Neurosurgery, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Hailey Budnick
- Department of Neurological Surgery, Section of Pediatric Neurosurgery, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Virendra R Desai
- Department of Neurosurgery, Section of Pediatric Neurosurgery, Oklahoma Children's Hospital, University of Oklahoma School of Medicine, Oklahoma City, Oklahoma, USA
| | - Jignesh Tailor
- Department of Neurological Surgery, Section of Pediatric Neurosurgery, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Jeffrey S Raskin
- Department of Neurosurgery, Section of Pediatric Neurosurgery, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University, Chicago, Illinois, USA
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14
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Abrego AM, Khan W, Wright CE, Islam MR, Ghajar MH, Bai X, Tandon N, Seymour JP. Sensing local field potentials with a directional and scalable depth electrode array. J Neural Eng 2023; 20:016041. [PMID: 36630716 DOI: 10.1088/1741-2552/acb230] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 01/11/2023] [Indexed: 01/13/2023]
Abstract
Objective. A variety of electrophysiology tools are available to the neurosurgeon for diagnosis, functional therapy, and neural prosthetics. However, no tool can currently address these three critical needs: (a) access to all cortical regions in a minimally invasive manner; (b) recordings with microscale, mesoscale, and macroscale resolutions simultaneously; and (c) access to spatially distant multiple brain regions that constitute distributed cognitive networks.Approach.We modeled, designed, and demonstrated a novel device for recording local field potentials (LFPs) with the form factor of a stereo-electroencephalographic electrode and combined with radially distributed microelectrodes.Main results. Electro-quasistatic models demonstrate that the lead body amplifies and shields LFP sources based on direction, enablingdirectional sensitivity andscalability, referred to as thedirectional andscalable (DISC) array.In vivo,DISC demonstrated significantly improved signal-to-noise ratio, directional sensitivity, and decoding accuracy from rat barrel cortex recordings during whisker stimulation. Critical for future translation, DISC demonstrated a higher signal to noise ratio (SNR) than virtual ring electrodes and a noise floor approaching that of large ring electrodes in an unshielded environment after common average referencing. DISC also revealed independent, stereoscopic current source density measures whose direction was verified after histology.Significance. Directional sensitivity of LFPs may significantly improve brain-computer interfaces and many diagnostic procedures, including epilepsy foci detection and deep brain targeting.
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Affiliation(s)
- Amada M Abrego
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
| | - Wasif Khan
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
| | - Christopher E Wright
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
- Department of Bioengineering, Rice University, Houston, TX 77030, United States of America
| | - M Rabiul Islam
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
| | - Mohammad H Ghajar
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
| | - Xiaokang Bai
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
| | - Nitin Tandon
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
| | - John P Seymour
- Department of Neurosurgery, University of Texas Health Science Center, Houston, TX 77030, United States of America
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77030, United States of America
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15
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Ong S, Kullmann A, Mertens S, Rosa D, Diaz-Botia CA. Electrochemical Testing of a New Polyimide Thin Film Electrode for Stimulation, Recording, and Monitoring of Brain Activity. MICROMACHINES 2022; 13:1798. [PMID: 36296151 PMCID: PMC9611492 DOI: 10.3390/mi13101798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/13/2022] [Accepted: 10/15/2022] [Indexed: 06/16/2023]
Abstract
Subdural electrode arrays are used for monitoring cortical activity and functional brain mapping in patients with seizures. Until recently, the only commercially available arrays were silicone-based, whose thickness and lack of conformability could impact their performance. We designed, characterized, manufactured, and obtained FDA clearance for 29-day clinical use (510(k) K192764) of a new thin-film polyimide-based electrode array. This study describes the electrochemical characterization undertaken to evaluate the quality and reliability of electrical signal recordings and stimulation of these new arrays. Two testing paradigms were performed: a short-term active soak with electrical stimulation and a 29-day passive soak. Before and after each testing paradigm, the arrays were evaluated for their electrical performance using Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV) and Voltage Transients (VT). In all tests, the impedance remained within an acceptable range across all frequencies. The different CV curves showed no significant changes in shape or area, which is indicative of stable electrode material. The electrode polarization remained within appropriate limits to avoid hydrolysis.
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16
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Larrew T, Skoch J, Ihnen SKZ, Arya R, Holland KD, Tenney JR, Horn PS, Leach JL, Krueger DA, Greiner HM, Mangano FT. Comparison of outcomes after stereoelectroencephalography and subdural grid monitoring in pediatric tuberous sclerosis complex. Neurosurg Focus 2022; 53:E5. [PMID: 36183179 DOI: 10.3171/2022.7.focus22335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/20/2022] [Indexed: 11/07/2022]
Abstract
OBJECTIVE
Patients with tuberous sclerosis complex (TSC) epilepsy present with unique clinical challenges such as early seizure onset and high rates of intractability and multifocality. Although there are numerous studies about the safety and efficacy of stereoelectroencephalography (SEEG), this topic has not been studied in TSC patients who have distinct epilepsy profiles. The authors investigated subdural grid (SDG) and SEEG monitoring to determine whether these procedures lead to similar seizure and safety outcomes and to identify features unique to this pediatric population.
METHODS
TSC patients who underwent SDG or SEEG placement and a second epilepsy surgery during the period from 2007 to 2021 were included in this single-center retrospective cohort analysis. Various patient, hospitalization, and epilepsy characteristics were collected.
RESULTS
A total of 50 TSC patients were included in this study: 30 were included in the SDG cohort and 20 in the SEEG cohort. Baseline weekly seizure count did not significantly differ between the 2 groups (p = 0.412). The SEEG group had a greater mean baseline number of antiepileptic drugs (AEDs) (3.0 vs 2.0, p = 0.003), higher rate of previous surgical interventions (25% vs 0%, p = 0.007), and larger proportion of patients who underwent bilateral monitoring (50% vs 13.3%, p = 0.005). Despite this, there was no significant difference in seizure freedom between the SDG and SEEG cohorts. The mean reduction in seizure count was 84.9% and 47.8% of patients were seizure free at last follow-up (mean 79.4 months). SEEG trended toward being a safer procedure than SDG monitoring, with a shorter mean ICU stay (0.7 days vs 3.9 days, p < 0.001), lower blood transfusion rate (0% vs 13.3%, p = 0.140), and lower surgical complication rate (0% vs 10%, p = 0.265).
CONCLUSIONS
In the comparison of the SDG and SEEG cohorts, the SEEG group included patients who appeared to receive more aggressive management and have a higher rate of multifocality, more prior surgical interventions, more AEDs at baseline, and a higher rate of bilateral invasive monitoring. Despite this, the SEEG cohort had similar seizure outcomes and a trend toward increased safety. Based on these findings, SEEG appears to allow for monitoring of a wider breadth of TSC patients given its minimally invasive nature and its relative simplicity for monitoring numerous regions of the brain.
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Affiliation(s)
- Thomas Larrew
- Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina
- Division of Pediatric Neurosurgery, Cincinnati Children’s Hospital Medical Center, Cincinnati
| | - Jesse Skoch
- Division of Pediatric Neurosurgery, Cincinnati Children’s Hospital Medical Center, Cincinnati
| | - S. Katie Z. Ihnen
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - Ravindra Arya
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - Katherine D. Holland
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - Jeffrey R. Tenney
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - Paul S. Horn
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - James L. Leach
- Division of Pediatric Neuroradiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Darcy A. Krueger
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - Hansel M. Greiner
- Division of Neurology, Cincinnati Children’s Hospital Medical Center, Cincinnati
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati; and
| | - Francesco T. Mangano
- Division of Pediatric Neurosurgery, Cincinnati Children’s Hospital Medical Center, Cincinnati
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Rahman RK, Tomlinson SB, Katz J, Galligan K, Madsen PJ, Tucker AM, Kessler SK, Kennedy BC. Stereoelectroencephalography before 2 years of age. Neurosurg Focus 2022; 53:E3. [DOI: 10.3171/2022.7.focus22336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/18/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVE
Stereoelectroencephalography (SEEG) is a widely used technique for localizing seizure onset zones prior to resection. However, its use has traditionally been avoided in children under 2 years of age because of concerns regarding pin fixation in the immature skull, intraoperative and postoperative electrode bolt security, and stereotactic registration accuracy. In this retrospective study, the authors describe their experience using SEEG in patients younger than 2 years of age, with a focus on the procedure’s safety, feasibility, and accuracy as well as surgical outcomes.
METHODS
A retrospective review of children under 2 years of age who had undergone SEEG while at Children’s Hospital of Philadelphia between November 2017 and July 2021 was performed. Data on clinical characteristics, surgical procedure, imaging results, electrode accuracy measurements, and postoperative outcomes were examined.
RESULTS
Five patients younger than 2 years of age underwent SEEG during the study period (median age 20 months, range 17–23 months). The mean age at seizure onset was 9 months. Developmental delay was present in all patients, and epilepsy-associated genetic diagnoses included tuberous sclerosis (n = 1), KAT6B (n = 1), and NPRL3 (n = 1). Cortical lesions included tubers from tuberous sclerosis (n = 1), mesial temporal sclerosis (n = 1), and cortical dysplasia (n = 3). The mean number of placed electrodes was 11 (range 6–20 electrodes). Bilateral electrodes were placed in 1 patient. Seizure onset zones were identified in all cases. There were no SEEG-related complications, including skull fracture, electrode misplacement, hemorrhage, infection, cerebrospinal fluid leakage, electrode pullout, neurological deficit, or death. The mean target point error for all electrodes was 1.0 mm. All patients proceeded to resective surgery, with a mean follow-up of 21 months (range 8–53 months). All patients attained a favorable epilepsy outcome, including Engel class IA (n = 2), IC (n = 1), ID (n = 1), and IIA (n = 1).
CONCLUSIONS
SEEG can be safely, accurately, and effectively utilized in children under age 2 with good postoperative outcomes using standard SEEG equipment. With minimal modification, this procedure is feasible in those with immature skulls and guides the epilepsy team’s decision-making for early and optimal treatment of refractory epilepsy through effective localization of seizure onset zones.
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Affiliation(s)
- Raphia K. Rahman
- Division of Neurosurgery, Children’s Hospital of Philadelphia, Pennsylvania
- Rowan University School of Osteopathic Medicine, Stratford, New Jersey
| | - Samuel B. Tomlinson
- Department of Neurosurgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Joshua Katz
- Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey
| | - Kathleen Galligan
- Division of Neurosurgery, Children’s Hospital of Philadelphia, Pennsylvania
| | - Peter J. Madsen
- Division of Neurosurgery, Children’s Hospital of Philadelphia, Pennsylvania
- Department of Neurosurgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Alexander M. Tucker
- Division of Neurosurgery, Children’s Hospital of Philadelphia, Pennsylvania
- Department of Neurosurgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Sudha Kilaru Kessler
- Division of Neurology, Children’s Hospital of Philadelphia, Pennsylvania; and
- Departments of Pediatrics and Neurology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Benjamin C. Kennedy
- Division of Neurosurgery, Children’s Hospital of Philadelphia, Pennsylvania
- Department of Neurosurgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
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18
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Remick M, Akwayena E, Harford E, Chilukuri A, White GE, Abel TJ. Subdural electrodes versus stereoelectroencephalography for pediatric epileptogenic zone localization: a retrospective cohort study. Neurosurg Focus 2022; 53:E4. [DOI: 10.3171/2022.7.focus2269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 07/19/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVE
The objective of this study was to compare the relative safety and effectiveness of invasive monitoring with subdural electrodes (SDEs) and stereoelectroencephalography (sEEG) in pediatric patients with drug-resistant epilepsy.
METHODS
A retrospective cohort study was performed in 176 patients who underwent invasive monitoring evaluations at UPMC Children’s Hospital of Pittsburgh between January 2000 and September 2021. To examine differences between SDE and sEEG groups, independent-samples t-tests for continuous variables and Pearson chi-square tests for categorical variables were performed. A p value < 0.1 was considered statistically significant.
RESULTS
There were 134 patients (76%) in the SDE group and 42 (24%) in the sEEG group. There was a difference in the proportion with complications (17.9% in the SDE group vs 7.1% in the sEEG group, p = 0.09) and resection (75.4% SDE vs 21.4% sEEG, p < 0.01) between SDE and sEEG patients. However, there was no observable difference in the rates of postresection seizure freedom at 1-year clinical follow-up (60.2% SDE vs 75.0% sEEG, p = 0.55).
CONCLUSIONS
These findings reveal a difference in rates of surgical complications and resection between SDEs and sEEG. Larger prospective, multi-institutional pediatric comparative effectiveness studies may further explore these associations.
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Affiliation(s)
| | | | | | | | | | - Taylor J. Abel
- Departments of Neurological Surgery,
- Bioengineering, University of Pittsburgh, Pennsylvania
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19
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Shlobin NA, Wang A, Phillips HW, Yan H, Ibrahim GM, Elkaim LM, Wang S, Liu X, Cai L, Nguyen DK, Fallah A, Weil AG. Sensorimotor outcomes after resection for perirolandic drug-resistant epilepsy: a systematic review and individual patient data meta-analysis. J Neurosurg Pediatr 2022; 30:410-427. [PMID: 35932272 DOI: 10.3171/2022.6.peds22160] [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: 04/26/2022] [Accepted: 06/22/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The prevalence of long-term postoperative sensorimotor deficits in children undergoing perirolandic resective epilepsy surgery is unclear. The risk of developing these deficits must be weighed against the potential reduction in seizure frequency after surgery. In this study, the authors investigated the prevalence of sensorimotor deficits after resective surgery at ≥ 1 year postoperatively. METHODS A systematic review and individual patient data meta-analysis was conducted using PubMed, Embase, and Scopus databases. Subgroups of patients were identified and categorized according to their outcomes as follows: group A patients were denoted as seizure free with no postoperative sensorimotor deficits; group B patients experienced seizure recurrence with no deficit; group C patients were seizure free with deficits; and group D patients were not seizure free and with deficits. Rates of sensory deficits were examined in patients undergoing postcentral gyrus resection, and rates of motor deficits were aggregated in patients undergoing precentral gyrus resection. RESULTS Of 797 articles resulting from the database searches, 6 articles including 164 pediatric patients at a mean age of 7.7 ± 5.2 years with resection for drug-resistant perirolandic epilepsy were included in the study. Seizure freedom was observed in 118 (72.9%) patients at a mean follow-up of 3.4 ± 1.8 years. In total, 109 (66.5%) patients did not develop sensorimotor deficits at last follow-up, while 55 (33.5%) had permanent deficits. Ten (14.3%) of 70 patients with postcentral gyrus resection had permanent sensory deficits. Of the postcentral gyrus resection patients, 41 (58.6%) patients were included in group A, 19 (27.1%) in group B, 7 (10.0%) in group C, and 3 (4.3%) in group D. Forty (37.7%) of 106 patients with precentral resections had permanent motor deficits. Of the precentral gyrus resection patients, 50 (47.2%) patients were in group A, 16 (15.1%) in group B, 24 (22.6%) in group C, and 16 (15.1%) in group D. Patients without focal cortical dysplasia were more likely to have permanent motor deficits relative to those with focal cortical dysplasia in the precentral surgery cohort (p = 0.02). CONCLUSIONS In total, 58.6% of patients were seizure free without deficit, 27.1% were not seizure free and without deficit, 10.0% were seizure free but with deficit, and 4.3% were not seizure free and with deficit. Future studies with functional and quality-of-life data, particularly for patients who experience seizure recurrence with no deficits (as in group B in the present study) and those who are seizure free with deficits (as in group C) after treatment, are necessary to guide surgical decision-making.
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Affiliation(s)
- Nathan A Shlobin
- 1Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Andrew Wang
- 2Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, California
| | - H Westley Phillips
- 2Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, California
| | - Han Yan
- 3Division of Neurosurgery, Hospital for Sick Children, Toronto, Ontario
| | - George M Ibrahim
- 3Division of Neurosurgery, Hospital for Sick Children, Toronto, Ontario
| | - Lior M Elkaim
- 4Division of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Shuang Wang
- 5Pediatric Epilepsy Center, Peking University First Hospital, Beijing, China
| | - Xiaoyan Liu
- 5Pediatric Epilepsy Center, Peking University First Hospital, Beijing, China
| | - Lixin Cai
- 5Pediatric Epilepsy Center, Peking University First Hospital, Beijing, China
| | - Dang K Nguyen
- 6Division of Neurology, University of Montreal Hospital Centre (CHUM), Montreal
- 7CHUM Research Centre, Montreal
- 9Department of Neuroscience, University of Montreal; and
| | - Aria Fallah
- 2Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, California
| | - Alexander G Weil
- 8Division of Neurosurgery, Sainte-Justine University Hospital and University of Montreal Hospital Centre (CHUM), Montreal
- 9Department of Neuroscience, University of Montreal; and
- 10Sainte-Justine Research Centre, University of Montreal, Quebec, Canada
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20
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Hunsaker JC, Scoville JP, Joyce E, Harper J, Kurudza E, Sweney M, Bollo RJ, Rolston JD. Stereotactic electroencephalography is associated with reduced opioid and nonsteroidal anti-inflammatory drug use when compared with subdural grids: a pediatric case series. J Clin Neurosci 2022; 101:180-185. [DOI: 10.1016/j.jocn.2022.05.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/18/2022] [Accepted: 05/13/2022] [Indexed: 11/25/2022]
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21
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Cross JH, Reilly C, Gutierrez Delicado E, Smith ML, Malmgren K. Epilepsy surgery for children and adolescents: evidence-based but underused. THE LANCET CHILD & ADOLESCENT HEALTH 2022; 6:484-494. [DOI: 10.1016/s2352-4642(22)00098-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 03/12/2022] [Accepted: 03/23/2022] [Indexed: 11/30/2022]
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22
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Kullmann A, Kridner D, Mertens S, Christianson M, Rosa D, Diaz-Botia CA. First Food and Drug Administration Cleared Thin-Film Electrode for Intracranial Stimulation, Recording, and Monitoring of Brain Activity—Part 1: Biocompatibility Testing. Front Neurosci 2022; 16:876877. [PMID: 35573282 PMCID: PMC9100917 DOI: 10.3389/fnins.2022.876877] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 03/28/2022] [Indexed: 11/16/2022] Open
Abstract
Subdural strip and grid invasive electroencephalography electrodes are routinely used for surgical evaluation of patients with drug-resistant epilepsy (DRE). Although these electrodes have been in the United States market for decades (first FDA clearance 1985), their fabrication, materials, and properties have hardly changed. Existing commercially available electrodes are made of silicone, are thick (>0.5 mm), and do not optimally conform to brain convolutions. New thin-film polyimide electrodes (0.08 mm) have been manufactured to address these issues. While different thin-film electrodes are available for research use, to date, only one electrode is cleared by Food and Drug Administration (FDA) for use in clinical practice. This study describes the biocompatibility tests that led to this clearance. Biocompatibility was tested using standard methods according to International Organization for Standardization (ISO) 10993. Electrodes and appropriate control materials were bent, folded, and placed in the appropriate extraction vehicles, or implanted. The extracts were used for in vitro and in vivo tests, to assess the effects of any potential extractable and leachable materials that may be toxic to the body. In vitro studies included cytotoxicity tested in L929 cell line, genotoxicity tested using mouse lymphoma assay (MLA) and Ames assay, and hemolysis tested in rabbit whole blood samples. The results indicated that the electrodes were non-cytotoxic, non-mutagenic, non-clastogenic, and non-hemolytic. In vivo studies included sensitization tested in guinea pigs, irritation tested in rabbits, acute systemic toxicity testing in mice, pyrogenicity tested in rabbits, and a prolonged 28-day subdural implant in sheep. The results indicated that the electrodes induced no sensitization and irritation, no weight loss, and no temperature increase. Histological examination of the sheep brain tissue showed no or minimal immune cell accumulation, necrosis, neovascularization, fibrosis, and astrocyte infiltration, with no differences from the control material. In summary, biocompatibility studies indicated that these new thin-film electrodes are appropriate for human use. As a result, the electrodes were cleared by the FDA for use in clinical practice [510(k) K192764], making it the first thin-film subdural electrode to progress from research to clinic. Its readiness as a commercial product ensures availability to all patients undergoing surgical evaluation for DRE.
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23
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Phan TN, Prakash KJ, Elliott RJS, Pasupuleti A, Gaillard WD, Keating RF, Oluigbo CO. Virtual reality-based 3-dimensional localization of stereotactic EEG (SEEG) depth electrodes and related brain anatomy in pediatric epilepsy surgery. Childs Nerv Syst 2022; 38:537-546. [PMID: 34718866 DOI: 10.1007/s00381-021-05403-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 10/23/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The increasing use of stereoelectroencephalography (SEEG) in the USA and the need for three-dimensional (3D) appreciation of complex spatial relationships between implanted stereotactic EEG depth electrodes and surrounding brain and cerebral vasculature are a challenge to clinicians who are used to two-dimensional (2D) appreciation of cortical anatomy having been traditionally trained on 2D radiologic imaging. Virtual reality and its 3D renderings have grown increasingly common in the multifaceted practice of neurosurgery. However, there exists a paucity in the literature regarding this emerging technology in its utilization of epilepsy surgery. METHODS An IRB-approved, single-center retrospective study identifying all SEEG pediatric patients in which virtual reality was applied was observed. RESULTS Of the 46 patients identified who underwent an SEEG procedure, 43.5% (20/46) had a 3D rendering (3DR) of their SEEG depth electrodes. All 3DRs were used during patient-family education and discussion among the Epilepsy multidisciplinary team meetings, while 35% (7/20) were used during neuronavigation in surgery. Three successful representative cases of its application were presented. DISCUSSION Our institution's experience regarding virtual reality in the 3D representation of SEEG depth electrodes and the application to pre-surgical planning, patient-family education, multidisciplinary communication, and intraoperative neuronavigation demonstrate its applicability in comprehensive epilepsy patient care.
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Affiliation(s)
- Tiffany N Phan
- Department of Neurosurgery, Children's National Hospital, 111 Michigan Ave NW, Washington, DC, 20010, USA
| | | | - Ross-Jordon S Elliott
- Department of Neurological Surgery, George Washington University, Washington, DC, USA
| | - Archana Pasupuleti
- Department of Neurology, Children's National Hospital, Washington, DC, USA
| | - William D Gaillard
- Department of Neurology, Children's National Hospital, Washington, DC, USA
| | - Robert F Keating
- Department of Neurosurgery, Children's National Hospital, 111 Michigan Ave NW, Washington, DC, 20010, USA
| | - Chima O Oluigbo
- Department of Neurosurgery, Children's National Hospital, 111 Michigan Ave NW, Washington, DC, 20010, USA.
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Kassiri J, Elliott C, Liu N, Narvacan K, Wheatly M, Sinclair D. Safety and Efficacy of Stereoelectroencephalography in Pediatric Epilepsy Surgery. JOURNAL OF PEDIATRIC EPILEPSY 2022. [DOI: 10.1055/s-0042-1743192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractStereoelectroencephalography (SEEG) is the preoperative assessment of choice when the epileptogenic zone (EZ) is unclear in patients requiring surgery for severe, drug-refractory epilepsy. There are relatively little data on the safety and efficacy of SEEG in the pediatric epilepsy population. We, therefore, investigated the insertional complications, rate of successful identification of the EZ, and long-term seizure outcomes following surgery after SEEG in children. This was a retrospective study of drug-resistant pediatric epilepsy patients treated with surgery between 2005 and 2020 and who underwent presurgical SEEG. Rationale for and coverage of SEEG, identification of the EZ, and ultimate seizure outcome following SEEG-tailored resections were collected and analyzed. Thirty patients (15 male, mean age: 12.4 ± 5 years) who underwent SEEG were studied. SEEG-related complications occurred in one case (3%). A total of 190 multicontact electrodes (mean: 7.0 ± 2.5 per patient) were implanted across 30 insertions capturing 440 electrographic seizures (mean: 17.5 ± 27.6 per patient). The most common rationale for SEEG was normal magnetic resonance imaging with surface EEG that failed to identify the EZ (17/30; 57%). SEEG identified a putative EZ in all cases, resulting in SEEG-tailored resections in 25/30 (83%). Freedom from disabling seizures was achieved following resections in 20/25 cases (80%) with 5.9 ± 4.0 years of postoperative follow-up. SEEG is a safe and effective way to identify the EZ in the presurgical evaluation of children with refractory epilepsy and permits effective and long-lasting SEEG-tailored resections.
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Affiliation(s)
- Janani Kassiri
- Division of Pediatric Neurology, University of Alberta, Edmonton, Alberta, Canada
- Comprehensive Epilepsy Program, University of Alberta, Edmonton, Alberta, Canada
| | - Cameron Elliott
- Comprehensive Epilepsy Program, University of Alberta, Edmonton, Alberta, Canada
- Division of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada
| | - Natarie Liu
- Division of Pediatric Neurology, University of Alberta, Edmonton, Alberta, Canada
- Comprehensive Epilepsy Program, University of Alberta, Edmonton, Alberta, Canada
| | - Karl Narvacan
- Division of Neurosurgery, University of Toronto, Toronto, Ontario, Canada
| | - Matt Wheatly
- Comprehensive Epilepsy Program, University of Alberta, Edmonton, Alberta, Canada
- Division of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada
| | - D.Barry Sinclair
- Division of Pediatric Neurology, University of Alberta, Edmonton, Alberta, Canada
- Comprehensive Epilepsy Program, University of Alberta, Edmonton, Alberta, Canada
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Oluigbo CO, Gaillard WD, Koubeissi MZ. The End Justifies the Means-A Call for Nuance in the Increasing Nationwide Adoption of Stereoelectroencephalography Over Subdural Electrode Monitoring in the Surgical Evaluation of Intractable Epilepsy. JAMA Neurol 2022; 79:221-222. [PMID: 35040868 DOI: 10.1001/jamaneurol.2021.4994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Chima O Oluigbo
- Department of Neurosurgery, Children's National Hospital, Washington, DC
| | | | - Mohamad Z Koubeissi
- Department of Neurology, The George Washington University Hospital, Washington, DC
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Kim W, Shen MY, Provenzano FA, Lowenstein DB, McBrian DK, Mandel AM, Sands TT, Riviello JJ, McKhann GM, Feldstein NA, Akman CI. The role of stereo-electroencephalography to localize the epileptogenic zone in children with nonlesional brain magnetic resonance imaging. Epilepsy Res 2022; 179:106828. [PMID: 34920378 DOI: 10.1016/j.eplepsyres.2021.106828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/06/2021] [Accepted: 11/19/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVE This study aimed to assess the clinical outcome and outcome predictive factors in pediatric epilepsy patients evaluated with stereo-electroencephalography (SEEG). METHODS Thirty-eight patients who underwent SEEG implantation at the Pediatric Epilepsy Center in New York Presbyterian Hospital between June 2014 and December 2019 were enrolled for retrospective chart review. Postoperative seizure outcomes were evaluated in patients with at least 12-months follow up. Meta-analysis was conducted via electronic literature search of data reported from 2000 to 2020 to evaluate significant surgical outcome predictors for SEEG evaluation in the pediatric population. RESULTS In the current case series of 25 postsurgical patients with long-term follow up, 16 patients (64.0%) were seizure free. An additional 7 patients (28.0%) showed significant seizure improvement and 2 patients (8.0%) showed no change in seizure activity. Patients with nonlesional magnetic resonance imaging (MRI) achieved seizure freedom in 50% (5/10) of cases. By comparison, 73% (11/15) of patients with lesional MRI achieved seizure freedom. Out of 12 studies, 158 pediatric patients were identified for inclusion in a meta-analysis of the effectiveness of SEEG. Seizure freedom was reported 54.4% (n = 86/158) of patients at last follow up. Among patients with nonlesional MRI, 45% (n = 24) achieved seizure freedom compared with patients with lesional MRI findings (61.2%, n:= 60) (p = 0.02). The risk for seizure recurrence was 2.15 times higher [95% confidence interval [CI] 1.06-4.37, p = 0.033] in patients diagnosed with nonlesional focal epilepsy compared to those with lesional epilepsy [ 1.49 (95% CI 1.06-2.114, p = 0.021]. CONCLUSION Evaluation by SEEG implantation in pediatric epilepsy is effective in localizing the epileptogenic zone with favorable outcome. Presence of a non-lesional brain MRI was associated with lower chances of seizure freedom. Further research is warranted to improve the efficacy of SEEG in localizing the epileptogenic zone in pediatric patients with non-lesional brain MRI.
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Affiliation(s)
- Woojoong Kim
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA
| | - Min Y Shen
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA
| | - Frank A Provenzano
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, USA
| | - Daniel B Lowenstein
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA
| | - Danielle K McBrian
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA
| | - Arthur M Mandel
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA
| | - Tristan T Sands
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA
| | - James J Riviello
- Department of Pediatrics, Section of Pediatric Neurology and Developmental Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Guy M McKhann
- Department of Neurological Surgery, Columbia University Medical Center, Columbia-Presbyterian, New York, USA
| | - Neil A Feldstein
- Division of Pediatric Neurosurgery, Department of Neurological Surgery, Columbia University Medical Center, Columbia-Presbyterian, New York, USA
| | - Cigdem I Akman
- Department of Neurology, Child Neurology Division, Children's Hospital of New York, Columbia-Presbyterian, New York, USA.
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Lepard JR, Kim I, Arynchyna A, Lew SM, Bollo RJ, O'Neill BR, Perry MS, Donahue D, Smyth MD, Blount J. Early implementation of stereoelectroencephalography in children: a multiinstitutional case series. J Neurosurg Pediatr 2021; 28:669-676. [PMID: 34479204 DOI: 10.3171/2021.5.peds20923] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 05/19/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Pediatric stereoelectroencephalography (SEEG) has been increasingly performed in the United States, with published literature being limited primarily to large single-center case series. The purpose of this study was to evaluate the experience of pediatric epilepsy centers, where the technique has been adopted in the last several years, via a multicenter case series studying patient demographics, outcomes, and complications. METHODS A retrospective cohort methodology was used based on the STROBE criteria. ANOVA was used to evaluate for significant differences between the means of continuous variables among centers. Dichotomous outcomes were assessed between centers using a univariate and multivariate logistic regression. RESULTS A total of 170 SEEG insertion procedures were included in the study from 6 different level 4 pediatric epilepsy centers. The mean patient age at time of SEEG insertion was 12.3 ± 4.7 years. There was no significant difference between the mean age at the time of SEEG insertion between centers (p = 0.3). The mean number of SEEG trajectories per patient was 11.3 ± 3.6, with significant variation between centers (p < 0.001). Epileptogenic loci were identified in 84.7% of cases (144/170). Patients in 140 cases (140/170, 82.4%) underwent a follow-up surgical intervention, with 47.1% (66/140) being seizure free at a mean follow-up of 30.6 months. An overall postoperative hemorrhage rate of 5.3% (9/170) was noted, with patients in 4 of these cases (4/170, 2.4%) experiencing a symptomatic hemorrhage and patients in 3 of these cases (3/170, 1.8%) requiring operative evacuation of the hemorrhage. There were no mortalities or long-term complications. CONCLUSIONS As the first multicenter case series in pediatric SEEG, this study has aided in establishing normative practice patterns in the application of a novel surgical technique, provided a framework for anticipated outcomes that is generalizable and useful for patient selection, and allowed for discussion of what is an acceptable complication rate relative to the experiences of multiple institutions.
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Affiliation(s)
- Jacob R Lepard
- 1Department of Neurological Surgery, University of Alabama at Birmingham, Alabama
| | - Irene Kim
- 2Department of Neurological Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anastasia Arynchyna
- 1Department of Neurological Surgery, University of Alabama at Birmingham, Alabama
| | - Sean M Lew
- 2Department of Neurological Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Robert J Bollo
- 3Department of Neurological Surgery, University of Utah, Salt Lake City, Utah
| | - Brent R O'Neill
- 4Department of Neurological Surgery, Colorado University, Colorado Springs, Colorado
| | - M Scott Perry
- 5Department of Neurology, Cook Children's Medical Center, Fort Worth
| | - David Donahue
- 6Department of Neurological Surgery, Cook Children's Medical Center, Fort Worth, Texas; and
| | - Matthew D Smyth
- 7Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Jeffrey Blount
- 1Department of Neurological Surgery, University of Alabama at Birmingham, Alabama
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Mavridis IN, Lo WB, Wimalachandra WSB, Philip S, Agrawal S, Scott C, Martin-Lamb D, Carr B, Bill P, Lawley A, Seri S, Walsh AR. Pediatric stereo-electroencephalography: effects of robot assistance and other variables on seizure outcome and complications. J Neurosurg Pediatr 2021; 28:404-415. [PMID: 34298516 DOI: 10.3171/2021.2.peds20810] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 02/19/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The safety of stereo-electroencephalography (SEEG) has been investigated; however, most studies have not differentiated pediatric and adult populations, which have different anatomy and physiology. The purpose of this study was to assess SEEG safety in the pediatric setting, focusing on surgical complications and the identification of patient and surgical risk factors, if any. The authors also aimed to determine whether robot assistance in SEEG was associated with a change in practice, surgical parameters, and clinical outcomes. METHODS The authors retrospectively studied all SEEG cases performed in their department from December 2014 to March 2020. They analyzed both demographic and surgical variables and noted the types of surgery-related complications and their management. They also studied the clinical outcomes of a subset of the patients in relation to robot-assisted and non-robot-assisted SEEG. RESULTS Sixty-three children had undergone 64 SEEG procedures. Girls were on average 3 years younger than the boys (mean age 11.1 vs 14.1 years, p < 0.01). The overall complication rate was 6.3%, and the complication rate for patients with left-sided electrodes was higher than that for patients with right-sided electrodes (11.1% vs 3.3%), although the difference between the two groups was not statistically significant. The duration of recording was positively correlated to the number of implanted electrodes (r = 0.296, p < 0.05). Robot assistance was associated with a higher number of implanted electrodes (mean 12.6 vs 7.6 electrodes, p < 0.0001). Robot-assisted implantations were more accurate, with a mean error of 1.51 mm at the target compared to 2.98 mm in nonrobot implantations (p < 0.001). Clinical outcomes were assessed in the first 32 patients treated (16 in the nonrobot group and 16 in the robot group), 23 of whom proceeded to further resective surgery. The children who had undergone robot-assisted SEEG had better eventual seizure control following subsequent epilepsy surgery. Of the children who had undergone resective epilepsy surgery, 42% (5/12) in the nonrobot group and 82% (9/11) in the robot group obtained an Engel class IA outcome at 1 year (χ2 = 3.885, p = 0.049). Based on Kaplan-Meier survival analysis, the robot group had a higher seizure-free rate than the nonrobot group at 30 months postoperation (7/11 vs 2/12, p = 0.063). Two complications, whose causes were attributed to the implantation and head-bandaging steps, required surgical intervention. All complications were either transient or reversible. CONCLUSIONS This is the largest single-center, exclusively pediatric SEEG series that includes robot assistance so far. SEEG complications are uncommon and usually transient or treatable. Robot assistance enabled implantation of more electrodes and improved epilepsy surgery outcomes, as compared to those in the non-robot-assisted cases.
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Affiliation(s)
| | | | | | | | | | - Caroline Scott
- 3Neurophysiology, Birmingham Children's Hospital, Birmingham, United Kingdom
| | - Darren Martin-Lamb
- 3Neurophysiology, Birmingham Children's Hospital, Birmingham, United Kingdom
| | - Bryony Carr
- 3Neurophysiology, Birmingham Children's Hospital, Birmingham, United Kingdom
| | - Peter Bill
- 3Neurophysiology, Birmingham Children's Hospital, Birmingham, United Kingdom
| | - Andrew Lawley
- 3Neurophysiology, Birmingham Children's Hospital, Birmingham, United Kingdom
| | - Stefano Seri
- 3Neurophysiology, Birmingham Children's Hospital, Birmingham, United Kingdom
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Beatty CW, Lockrow JP, Gedela S, Gehred A, Ostendorf AP. The Missed Value of Underutilizing Pediatric Epilepsy Surgery: A Systematic Review. Semin Pediatr Neurol 2021; 39:100917. [PMID: 34620465 DOI: 10.1016/j.spen.2021.100917] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 08/09/2021] [Accepted: 08/11/2021] [Indexed: 10/20/2022]
Abstract
Pediatric epilepsy surgery is underutilized. Only 1%-11% of children with drug resistant epilepsy (DRE) undergo surgical treatment, or less than half of those estimated to benefit. We conducted a systematic review of articles published in PubMed, EMBASE, and Web of Science in order to study the factors related to surgery underutilization as well as the impact on both the individual and the healthcare system. Our review demonstrates multiple factors leading to underutilization, including family misconceptions about epilepsy surgery, lack of provider knowledge, as well as systemic health disparities. While the upfront cost of epilepsy surgery is significant, the long-term financial benefits and reduced health resource utilization tilt the economic advantage in favor of surgery in children with DRE. Additionally, timely interventions improve seizure and cognitive outcomes with low risk of complications. Further interventions are needed at the levels of family, provider, and the healthcare system to increase access to pediatric epilepsy surgery.
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Affiliation(s)
- Christopher W Beatty
- The Ohio State University and Nationwide Children's Hospital, Division of Neurology, Department of Pediatrics, Columbus, OH
| | - Jason P Lockrow
- Department of Neurology, Section of Pediatric Neurology, University of Washington, Seattle, WA
| | - Satyanarayana Gedela
- Emory University and Children's Healthcare of Atlanta, Division of Neurology, Department of Pediatrics, Atlanta, GA
| | - Alison Gehred
- Medical Library Division, Nationwide Children's Hospital, Columbus, OH
| | - Adam P Ostendorf
- The Ohio State University and Nationwide Children's Hospital, Division of Neurology, Department of Pediatrics, Columbus, OH.
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30
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Stereo-electroencephalography (SEEG) in pediatric epilepsy: Utility in children with and without prior epilepsy surgery failure. Epilepsy Res 2021; 177:106765. [PMID: 34537417 DOI: 10.1016/j.eplepsyres.2021.106765] [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: 05/09/2021] [Revised: 08/30/2021] [Accepted: 09/10/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND When noninvasive modalities fail to adequately localize the seizure onset zone (SOZ) in children with medically refractory epilepsy, invasive interrogation with stereo-electroencephalography (SEEG) or subdural electrodes may be required. Our center utilizes SEEG for invasive monitoring in a carefully selected population of children, many of whom have seizures despite a prior surgical resection. We describe the cohort of patients who underwent SEEG in the first 5 years of its employment in our institution, almost half of which had a history of a failed epilepsy surgery. METHODS We retrospectively reviewed the records of the first 44 consecutive children who underwent SEEG at Nicklaus Children's Hospital (Miami, Florida), a large, level 4 epilepsy referral center. Patient demographic, clinical, radiographic, and electrophysiological information was collected prospectively. Student's t-test was used for sampling of means and analysis of variance (ANOVA) for evaluation of variance beyond 2 means; chi-square test of independence was used to assess the relationship between categorical variables. RESULTS There were 44 patients in this cohort, of whom 17 (38.6 %) were male. The mean age of seizure onset was 6.2 years. Twenty-one patients (47.7 %) had previously failed an epilepsy surgery. Patients with a history of prior epilepsy surgery failure were older at SEEG implantation (17.6 vs. 13.7 years; p = 0.043), were more likely to have SEEG for identification of resection margins (9 vs. 4; p = 0.034), and had fewer electrodes placed (5.9 vs. 7.5; p = 0.016). No difference was seen in complication rates between groups with only 3/297 electrodes placed associated with complications, all of which were minor. Post-SEEG, 29 (65.9 %) patients underwent focal resection, 7 patients had VNS insertion, 3 underwent RNS placement, and 5 had no further intervention. The majority of patients that underwent resection in both groups experienced an improvement in seizures (Engel class I-III), reported by 13/15 (86.7 %) in those naive to surgery and 10/14 (71.4 %) in those with prior surgical failure. Seizure-freedom was much lower in those with prior epilepsy surgery, seen in only 4/14 (28.6 %) versus 8/15 (53.3 %). CONCLUSION Our data supports current literature on SEEG as a safe and effective method of electrophysiological evaluation in children naive to surgery and adds that it is a safe technique in children with a history of failed epilepsy surgery. There was no difference in complication rates, which were <1 % in both groups. A favorable outcome was seen in the majority of patients in both groups; the seizure freedom rate, however, was much lower in those with prior epilepsy surgery.
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Comparison of subdural grid and stereoelectroencephalography in a cohort of pediatric patients. Epilepsy Res 2021; 177:106758. [PMID: 34530304 DOI: 10.1016/j.eplepsyres.2021.106758] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 08/17/2021] [Accepted: 09/07/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To compare adverse events and outcomes between stereoelectroencephalography (SEEG) and subdural electrode (SDE) implantation in children. METHODS This was a retrospective analysis of 108 patients who underwent intracranial monitoring with SEEG or SDE implantation at Children's Hospital Colorado between January 2011 and June 2019. RESULTS There were 47 patients who underwent 53 SEEG implantations and 61 patients who underwent 64 SDE implantations, with an average age of 12.45 years (range: 1.22-19.96 years). Post-implantation imaging was performed in all SEEG implantations and 42 SDE implantations. 38 % and 88 % of SEEG and SDE implantations, respectively, had a hemorrhage of any kind (p < 0.01). Clinically significant hemorrhages did not differ between the two groups, though one death was reported in the SEEG group. No patient undergoing SEEG implantation received blood products compared to 20 % of SDE patients (p < 0.01). The rate of infection in SEEG patients was 4% compared to 33 % for SDE patients (p = 0.01). Resection was completed in 60 % of SEEG patients versus 93 % for SDE patients (p < 0.01). Rate of seizure response was not significantly different between the two groups, with 81 % and 71 % of SEEG and SDE patients, respectively, reaching Engel class I or II at 12 months (p = 0.76). SIGNIFICANCE In pediatric patients at a single institution, SEEG is associated with less adverse effects overall yet similar rates of seizure freedom compared to SDE implantation. This includes significantly lower rates of asymptomatic hemorrhage, infection and need for blood transfusion associated with SEEG monitoring. There was no statistical difference in clinically significant hemorrhages between the two groups, although rare in both.
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Scoville JP, Joyce E, Hunsaker J, Reese J, Wilde H, Arain A, Bollo RL, Rolston JD. Stereotactic Electroencephalography Is Associated With Reduced Pain and Opioid Use When Compared with Subdural Grids: A Case Series. Oper Neurosurg (Hagerstown) 2021; 21:6-13. [PMID: 33733680 DOI: 10.1093/ons/opab040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/25/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Minimally invasive surgery (MIS) has been shown to decrease length of hospital stay and opioid use. OBJECTIVE To identify whether surgery for epilepsy mapping via MIS stereotactically placed electroencephalography (SEEG) electrodes decreased overall opioid use when compared with craniotomy for EEG grid placement (ECoG). METHODS Patients who underwent surgery for epilepsy mapping, either SEEG or ECoG, were identified through retrospective chart review from 2015 through 2018. The hospital stay was separated into specific time periods to distinguish opioid use immediately postoperatively, throughout the rest of the stay and at discharge. The total amount of opioids consumed during each period was calculated by transforming all types of opioids into their morphine equivalents (ME). Pain scores were also collected using a modification of the Clinically Aligned Pain Assessment (CAPA) scale. The 2 surgical groups were compared using appropriate statistical tests. RESULTS The study identified 43 patients who met the inclusion criteria: 36 underwent SEEG placement and 17 underwent craniotomy grid placement. There was a statistically significant difference in median opioid consumption per hospital stay between the ECoG and the SEEG placement groups, 307.8 vs 71.5 ME, respectively (P = .0011). There was also a significant difference in CAPA scales between the 2 groups (P = .0117). CONCLUSION Opioid use is significantly lower in patients who undergo MIS epilepsy mapping via SEEG compared with those who undergo the more invasive ECoG procedure. As part of efforts to decrease the overall opioid burden, these results should be considered by patients and surgeons when deciding on surgical methods.
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Affiliation(s)
- Jonathan P Scoville
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA
| | - Evan Joyce
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA
| | - Joshua Hunsaker
- School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Jared Reese
- School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Herschel Wilde
- School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Amir Arain
- Department of Neurology, Clinical Neurosciences Center, University of Utah, Salt Lake City, Utah, USA
| | - Robert L Bollo
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA
| | - John D Rolston
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA.,Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, Utah, USA
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The UK experience of stereoelectroencephalography in children: An analysis of factors predicting the identification of a seizure-onset zone and subsequent seizure freedom. Epilepsia 2021; 62:1883-1896. [PMID: 34165813 DOI: 10.1111/epi.16954] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/13/2021] [Accepted: 05/13/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Stereoelectroencephalography (SEEG) is being used more frequently in the pre-surgical evaluation of children with focal epilepsy. It has been shown to be safe in children, but there are no multicenter studies assessing the rates and factors associated with the identification of a putative seizure-onset zone (SOZ) and subsequent seizure freedom following SEEG-guided epilepsy surgery. METHODS Multicenter retrospective cohort study of all children undergoing SEEG at six of seven UK Children's Epilepsy Surgery Service centers from 2014 to 2019. Demographics, noninvasive evaluation, SEEG, and operative factors were analyzed to identify variables associated with the identification of a putative SOZ and subsequent seizure freedom following SEEG-guided epilepsy surgery. RESULTS One hundred thirty-five patients underwent 139 SEEG explorations using a total of 1767 electrodes. A putative SOZ was identified in 117 patients (85.7%); odds of successfully finding an SOZ were 6.4 times greater for non-motor seizures compared to motor seizures (p = 0.02) and 3.6 times more if four or more seizures were recorded during SEEG (p = 0.03). Of 100 patients undergoing surgical treatment, 47 (47.0%) had an Engel class I outcome at a median follow-up of 1.3 years; the only factor associated with outcome was indication for SEEG (p = 0.03); an indication of "recurrence following surgery/treatment" had a 5.9 times lower odds of achieving seizure freedom (p = 0.002) compared to the "lesion negative" cohort, whereas other indications ("lesion positive, define extent," "lesion positive, discordant noninvasive investigations" and "multiple lesions") were not statistically significantly different. SIGNIFICANCE This large nationally representative cohort illustrates that SEEG-guided surgery can still achieve high rates of seizure freedom. Seizure semiology and the number of seizures recorded during SEEG are important factors in the identification of a putative SOZ, and the indication for SEEG is an important factor in postoperative outcomes.
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34
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Fiani B, Jarrah R, Doan T, Shields J, Houston R, Sarno E. Stereoelectroencephalography versus Subdural Electrode Implantation to Determine Whether Patients with Drug-resistant Epilepsy Are Candidates for Epilepsy Surgery. Neurol Med Chir (Tokyo) 2021; 61:347-355. [PMID: 33967179 PMCID: PMC8258005 DOI: 10.2176/nmc.ra.2020-0361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Epilepsy is a chronic condition that affects about 50 million individuals worldwide. While its challenges are profound, there are increasing instances where antiepileptic drugs (AEDs) fail to provide relief to epileptic manifestations. For these pharmacoresistant cases, epilepsy surgery often is an effective route for treatment. However, the complexity and challenges associated with presurgical evaluations have prevented more widespread utilization of epilepsy surgery in pharmacoresistant cases. While preliminary work-ups and non-invasive diagnostic imaging have allowed for limited identification of the epileptogenic zone (EZ), there is yet to be an established pre-determined algorithm for surgical evaluation of patients with epilepsy. However, two modalities are currently being used for localization of the EZ and in determining candidates for surgery: stereoelectroencephalography (SEEG) and subdural electrodes (SDEs). SDE has been used in the United States for decades; however, SEEG now provides a less invasive option for mapping brain regions. We seek to address which intracranial monitoring technique is superior. Through a review of the outcomes of various clinical studies, SEEG was found to have greater safety and efficiency benefits than SDE, such as lower morbidity rates, lower prevalence of neurological deficits, and shorter recovery times. Moreover, SEEG was also found to have further functional benefits by allowing for deeper targeting of cerebral tissue along with bilateral hemispheric monitoring. This has led to increased rates of seizure freedom and control among SEEG patients. Nevertheless, further studies on the limitations and advancements of SEEG and SDE are still required to provide a more comprehensive understanding regarding their application.
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Affiliation(s)
- Brian Fiani
- Department of Neurosurgery, Desert Regional Medical Center
| | | | | | | | | | - Erika Sarno
- Michigan State University College of Osteopathic Medicine
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35
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Khapov IV, Melikyan AG. [Stereoelectroencephalography (seeg): a brief historical review of modern deep electrode implantation methods used for diagnosis and treatment of epilepsy]. ZHURNAL VOPROSY NEĬROKHIRURGII IMENI N. N. BURDENKO 2021; 85:99-106. [PMID: 33864674 DOI: 10.17116/neiro20218502199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
More than 30% of patients with symptomatic epilepsy are resistant to drug therapy and therefore surgical treatment is the method of choice for such patients. Search and localization of the epileptogenic zone and all parts of the neural networks involved in stereotypic seizures are the most important objectives of pre-surgical evaluation and the prerequisite for the successful surgery. In the last decade, stereotactic implantation of multiple intracerebral multi-contact electrodes (SEEG) has been increasingly used for this purpose. The article includes a brief history of SEEG and a description of the major techniques for stereotactic implantation of electrodes. Information on accuracy (errors and deviations from planned target) and on complications are summarized. The data on the clinical value of the method and how these data affected the results of subsequent treatment are highlighted. The method of thermocoagulation and its results are briefly considered.
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Affiliation(s)
- I V Khapov
- Burdenko Neurosurgical Center, Moscow, Russia
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Kalbhenn T, Cloppenborg T, Coras R, Fauser S, Hagemann A, Omaimen H, Polster T, Yasin H, Woermann FG, Bien CG, Simon M. Stereotactic depth electrode placement surgery in paediatric and adult patients with the Neuromate robotic device: Accuracy, complications and epileptological results. Seizure 2021; 87:81-87. [PMID: 33730649 DOI: 10.1016/j.seizure.2021.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/04/2021] [Accepted: 03/05/2021] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE The number of patients requiring depth electrode implantation for invasive video EEG diagnostics increases in most epilepsy centres. Here we report on our institutional experience with frameless robot-assisted stereotactic placement of intracerebral depth electrodes using the Neuromate® stereotactic robot-system. METHODS We identified all patients who had undergone robot-assisted stereotactic placement of intracerebral depth electrodes for invasive extra-operative epilepsy monitoring between September 2013 and March 2020. We studied technical (placement) and diagnostic accuracy of the robot-assisted procedure, associated surgical complications and procedural time requirements. RESULTS We evaluated a total of 464 depth electrodes implanted in 74 patients (mean 6 per patient, range 1-12). There were 27 children and 47 adults (age range: 3.6-64.6 yrs.). The mean entry and target point errors were 1.82±1.15 and 1.98±1.05 mm. Target and entry point errors were significantly higher in paediatric vs. adult patients and for electrodes targeting the temporo-mesial region. There were no clinically relevant haemorrhages and no infectious complications. Mean time for the placement of one electrode was 37±14 min and surgery time per electrode decreased with the number of electrodes placed. 55 patients (74.3%) underwent definitive surgical treatment. 36/51 (70.1%) patients followed for >12 months or until seizure recurrence became seizure-free (ILAE I). CONCLUSION Frameless robot-guided stereotactic placement of depth electrodes with the Neuromate® stereotactic robot-system is safe and feasible even in very young children, with good in vivo accuracy and high diagnostic precision. The surgical workflow is time-efficient and further improves with increasing numbers of implanted electrodes.
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Affiliation(s)
- Thilo Kalbhenn
- Department of Neurosurgery - Epilepsy surgery, Evangelisches Klinikum Bethel, Kantensiek 11, 33617 Bielefeld, Germany.
| | - Thomas Cloppenborg
- Epilepsy Centre, Krankenhaus Mara, Maraweg 17-21, 33617 Bielefeld, Germany
| | - Roland Coras
- Department of Neuropathology, University Hospital Erlangen, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Susanne Fauser
- Epilepsy Centre, Krankenhaus Mara, Maraweg 17-21, 33617 Bielefeld, Germany
| | - Anne Hagemann
- Society for Epilepsy Research, Maraweg 21, 33617 Bielefeld, Germany
| | - Hassan Omaimen
- Institute of diagnostic and interventional Neuroradiology, Evangelisches Klinikum Bethel, Burgsteig 13, 33617 Bielefeld, Germany
| | - Tilman Polster
- Epilepsy Centre, Krankenhaus Mara, Maraweg 17-21, 33617 Bielefeld, Germany
| | - Hamzah Yasin
- Department of Neurosurgery - Epilepsy surgery, Evangelisches Klinikum Bethel, Kantensiek 11, 33617 Bielefeld, Germany
| | | | - Christian G Bien
- Epilepsy Centre, Krankenhaus Mara, Maraweg 17-21, 33617 Bielefeld, Germany; Society for Epilepsy Research, Maraweg 21, 33617 Bielefeld, Germany
| | - Matthias Simon
- Department of Neurosurgery - Epilepsy surgery, Evangelisches Klinikum Bethel, Kantensiek 11, 33617 Bielefeld, Germany
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Khoo HM, Hall JA, Dubeau F, Tani N, Oshino S, Fujita Y, Gotman J, Kishima H. Technical Aspects of SEEG and Its Interpretation in the Delineation of the Epileptogenic Zone. Neurol Med Chir (Tokyo) 2020; 60:565-580. [PMID: 33162469 PMCID: PMC7803703 DOI: 10.2176/nmc.st.2020-0176] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Stereo-electroencephalography (SEEG) has gained global popularity in recent years. In Japan, a country in which invasive studies using subdural electrodes (SDEs) have been the mainstream, SEEG has been approved for insurance coverage in 2020 and is expected to gain in popularity. Some concepts supporting SEEG methodology are fundamentally different from that of SDE studies. Clinicians interested in utilizing SEEG in their practice should be aware of those aspects in which they differ. Success in utilizing the SEEG methodology relies heavily on the construction of an a priori hypothesis regarding the putative seizure onset zone (SOZ) and propagation. This article covers the technical and theoretical aspects of SEEG, including the surgical techniques and precautions, hypothesis construction, and the interpretation of the recording, all with the aim of providing an introductory guide to SEEG.
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Affiliation(s)
- Hui Ming Khoo
- Department of Neurosurgery, Osaka University Graduate School of Medicine
| | - Jeffery A Hall
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, McGill University
| | - Francois Dubeau
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, McGill University
| | - Naoki Tani
- Department of Neurosurgery, Osaka University Graduate School of Medicine
| | - Satoru Oshino
- Department of Neurosurgery, Osaka University Graduate School of Medicine
| | - Yuya Fujita
- Department of Neurosurgery, Osaka University Graduate School of Medicine
| | - Jean Gotman
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, McGill University
| | - Haruhiko Kishima
- Department of Neurosurgery, Osaka University Graduate School of Medicine
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Liu Y, Chen G, Chen J, Zhou J, Su L, Zhao T, Zhang G. Individualized stereoelectroencephalography evaluation and navigated resection in medically refractory pediatric epilepsy. Epilepsy Behav 2020; 112:107398. [PMID: 32891888 DOI: 10.1016/j.yebeh.2020.107398] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 07/30/2020] [Accepted: 08/02/2020] [Indexed: 11/25/2022]
Abstract
Pediatric patients frequently require invasive exploration with intracranial electrodes to achieve high-resolution delineation of the epileptogenic zones (EZ). We intend to discuss the efficacy and safety of stereoelectroencephalophraphy (SEEG) monitoring in pediatric patients with difficulty to localize the EZ. We retrospectively analyzed presurgical findings, SEEG data, resections, and outcomes of a series of 72 consecutive pediatric patients (<18 yrs) who had medically refractory epilepsy and received SEEG recording between January 2015 and September 2019. There were 20 girls and 52 boys with a mean age of 10.13 ± 4.11 years old (range: 1.8-18 years). Twenty-seven patients (37.5%) had nonlesional magnetic resonance imagings (MRIs). In total, 744 electrodes were implanted for an average of 10.33 ± 2.53 (range: 3-18) electrodes per patient. Twenty-eight explorations were unilateral (17 left and 11 right), and 44 explorations were bilateral (12 of which was predominately one side). The average monitoring period in days for the SEEG was 8.99 ± 5.79 (range: 3-25) days. The EZ could be located in 67 (94.4%) patients for the initial implantation according to SEEG monitoring. Lobectomy was performed in 12 patients (17.9%), of those anterior temporal lobectomy (ATL) was performed in 8 cases (11.9%) and insular plus was 2 cases (3.0%), multilobectomy resections in 15 cases (22.4%), tailored cortical resections in 37 cases (55.2%), and corpus callosotomy plus in 2 cases (3.0%). The average follow-up was 18.1 ± 7.53 months (range: 6-54). Forty-three of 67 patients (64.2%) were Engel class I, 12 patients (17.9%) were Engel class II, 10 patients (14.9%) were Engel class III, and an additional 2 patients (3.0%) were Engel class IV. In the SEEG implantation series, no child experienced serious or permanent morbidity. One patient (1.4%) experienced symptomatic intracranial hemorrhage (ICH), and 3 patients (4.2%) experienced asymptomatic ICH. There were no postimplantation infections or other postoperative complications associated with the SEEG. Several common complications related to resection surgery were included in this series with zero mortality. Of the 6 patients in whom we performed a second surgery, 4 of them subsequently became seizure-free (66.7%) after undergoing the second resection with SEEG evaluation. Stereoelectroencephalophraphy is a safe and efficient methodology to identify the EZ in particularly complex cases of focal medically refractory epilepsy for pediatric patients, even in infancy and early childhood. Seizure outcomes of SEEG-guided resection surgery are desirable. We recommend SEEG evaluations and even a more aggressive resection in certain pediatric patients who failed initial resection with realistic chances to benefit from reoperation.
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Affiliation(s)
- Yaoling Liu
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China
| | - Guoqiang Chen
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China
| | - Jianwei Chen
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China
| | - Junjian Zhou
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China
| | - Lanmei Su
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China
| | - Tong Zhao
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China
| | - Guangming Zhang
- Department of Neurosurgery, Epilepsy Center, Aviation General Hospital, China Medical University, Beijing, China; Beijing Institute of Translational Medicine of Chinese Academy of Sciences, Beijing, China.
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Kim LH, Parker JJ, Ho AL, Pendharkar AV, Sussman ES, Halpern CH, Porter B, Grant GA. Postoperative outcomes following pediatric intracranial electrode monitoring: A case for stereoelectroencephalography (SEEG). Epilepsy Behav 2020; 104:106905. [PMID: 32028127 DOI: 10.1016/j.yebeh.2020.106905] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/15/2019] [Accepted: 01/06/2020] [Indexed: 01/29/2023]
Abstract
BACKGROUND For patients with medically refractory epilepsy, intracranial electrode monitoring can help identify epileptogenic foci. Despite the increasing utilization of stereoelectroencephalography (SEEG), the relative risks or benefits associated with the technique when compared with the traditional subdural electrode monitoring (SDE) remain unclear, especially in the pediatric population. Our aim was to compare the outcomes of pediatric patients who received intracranial monitoring with SEEG or SDE (grids and strips). METHODS We retrospectively studied 38 consecutive pediatric intracranial electrode monitoring cases performed at our institution from 2014 to 2017. Medical/surgical history and operative/postoperative records were reviewed. We also compared direct inpatient hospital costs associated with the two procedures. RESULTS Stereoelectroencephalography and SDE cohorts both showed high likelihood of identifying epileptogenic zones (SEEG: 90.9%, SDE: 87.5%). Compared with SDE, SEEG patients had a significantly shorter operative time (118.7 versus 233.4 min, P < .001) and length of stay (6.2 versus 12.3 days, P < .001), including days spent in the intensive care unit (ICU; 1.4 versus 5.4 days, P < .001). Stereoelectroencephalography patients tended to report lower pain scores and used significantly less narcotic pain medications (54.2 versus 197.3 mg morphine equivalents, P = .005). No complications were observed. Stereoelectroencephalography and SDE cohorts had comparable inpatient hospital costs (P = .47). CONCLUSION In comparison with subdural electrode placement, SEEG results in a similarly favorable clinical outcome, but with reduced operative time, decreased narcotic usage, and superior pain control without requiring significantly higher costs. The potential for an improved postoperative intracranial electrode monitoring experience makes SEEG especially suitable for pediatric patients.
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Affiliation(s)
- Lily H Kim
- Department of Neurosurgery, Stanford University School of Medicine, United States of America
| | - Jonathon J Parker
- Department of Neurosurgery, Stanford University School of Medicine, United States of America
| | - Allen L Ho
- Department of Neurosurgery, Stanford University School of Medicine, United States of America
| | - Arjun V Pendharkar
- Department of Neurosurgery, Stanford University School of Medicine, United States of America
| | - Eric S Sussman
- Department of Neurosurgery, Stanford University School of Medicine, United States of America
| | - Casey H Halpern
- Department of Neurosurgery, Stanford University School of Medicine, United States of America
| | - Brenda Porter
- Department of Neurology, Stanford University School of Medicine, United States of America; Division of Pediatric Neurology, Lucile Packard Children's Hospital Stanford, United States of America
| | - Gerald A Grant
- Department of Neurosurgery, Stanford University School of Medicine, United States of America; Division of Pediatric Neurosurgery, Lucile Packard Children's Hospital Stanford, United States of America.
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Tomlinson SB, Buch VP, Armstrong D, Kennedy BC. Stereoelectroencephalography in Pediatric Epilepsy Surgery. J Korean Neurosurg Soc 2019; 62:302-312. [PMID: 31085956 PMCID: PMC6514312 DOI: 10.3340/jkns.2019.0015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 02/05/2019] [Indexed: 12/25/2022] Open
Abstract
Stereoelectroencephalography (SEEG) is an invasive technique used during the surgical management of medically refractory epilepsy. The utility of SEEG rests in its ability to survey the three-dimensional organization of the epileptogenic zone as well as nearby eloquent cortices. Once concentrated to specialized centers in Europe and Canada, the SEEG methodology has gained worldwide popularity due to its favorable morbidity profile, superior coverage of deep structures, and ability to perform multilobar explorations without the need for craniotomy. This rapid shift in practice represents both a challenge and an opportunity for pediatric neurosurgeons familiar with the subdural grid approach. The purpose of this review is to discuss the indications, technique, and safety of long-term SEEG monitoring in children. In addition to reviewing the conceptual and technical points of the diagnostic evaluation, attention will also be given to SEEG-based interventions (e.g., radiofrequency thermo-coagulation).
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Affiliation(s)
- Samuel B Tomlinson
- Division of Neurosurgery, Children's Hospital of Philadelphia, Philadelphia, PA, USA.,School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, NY, USA
| | - Vivek P Buch
- Department of Neurosurgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Dallas Armstrong
- Division of Child Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Benjamin C Kennedy
- Division of Neurosurgery, Children's Hospital of Philadelphia, Philadelphia, PA, USA
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Youngerman BE, Khan FA, McKhann GM. Stereoelectroencephalography in epilepsy, cognitive neurophysiology, and psychiatric disease: safety, efficacy, and place in therapy. Neuropsychiatr Dis Treat 2019; 15:1701-1716. [PMID: 31303757 PMCID: PMC6610288 DOI: 10.2147/ndt.s177804] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 05/22/2019] [Indexed: 12/14/2022] Open
Abstract
For patients with drug-resistant epilepsy, surgical intervention may be an effective treatment option if the epileptogenic zone (EZ) can be well localized. Subdural strip and grid electrode (SDE) implantations have long been used as the mainstay of intracranial seizure localization in the United States. Stereoelectroencephalography (SEEG) is an alternative approach in which depth electrodes are placed through percutaneous drill holes to stereotactically defined coordinates in the brain. Long used in certain centers in Europe, SEEG is gaining wider popularity in North America, bolstered by the advent of stereotactic robotic assistance and mounting evidence of safety, without the need for catheter-based angiography. Rates of clinically significant hemorrhage, infection, and other complications appear lower with SEEG than with SDE implants. SEEG also avoids unnecessary craniotomies when seizures are localized to unresectable eloquent cortex, found to be multifocal or nonfocal, or ultimately treated with stereotactic procedures such as laser interstitial thermal therapy (LITT), radiofrequency thermocoagulation (RF-TC), responsive neurostimulation (RNS), or deep brain stimulation (DBS). While SDE allows for excellent localization and functional mapping on the cortical surface, SEEG offers a less invasive option for sampling disparate brain areas, bilateral investigations, and deep or medial targets. SEEG has shown efficacy for seizure localization in the temporal lobe, the insula, lesional and nonlesional extra-temporal epilepsy, hypothalamic hamartomas, periventricular nodular heterotopias, and patients who have had prior craniotomies for resections or grids. SEEG offers a valuable opportunity for cognitive neurophysiology research and may have an important role in the study of dysfunctional networks in psychiatric disease and understanding the effects of neuromodulation.
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Affiliation(s)
- Brett E Youngerman
- Department of Neurological Surgery, Columbia University Medical Center, New York, NY, USA
| | - Farhan A Khan
- Department of Neurological Surgery, Columbia University Medical Center, New York, NY, USA
| | - Guy M McKhann
- Department of Neurological Surgery, Columbia University Medical Center, New York, NY, USA
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