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Baumgartner C, Koren JP, Britto-Arias M, Zoche L, Pirker S. Presurgical epilepsy evaluation and epilepsy surgery. F1000Res 2019; 8. [PMID: 31700611 PMCID: PMC6820825 DOI: 10.12688/f1000research.17714.1] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/14/2019] [Indexed: 12/21/2022] Open
Abstract
With a prevalence of 0.8 to 1.2%, epilepsy represents one of the most frequent chronic neurological disorders; 30 to 40% of patients suffer from drug-resistant epilepsy (that is, seizures cannot be controlled adequately with antiepileptic drugs). Epilepsy surgery represents a valuable treatment option for 10 to 50% of these patients. Epilepsy surgery aims to control seizures by resection of the epileptogenic tissue while avoiding neuropsychological and other neurological deficits by sparing essential brain areas. The most common histopathological findings in epilepsy surgery specimens are hippocampal sclerosis in adults and focal cortical dysplasia in children. Whereas presurgical evaluations and surgeries in patients with mesial temporal sclerosis and benign tumors recently decreased in most centers, non-lesional patients, patients requiring intracranial recordings, and neocortical resections increased. Recent developments in neurophysiological techniques (high-density electroencephalography [EEG], magnetoencephalography, electrical and magnetic source imaging, EEG-functional magnetic resonance imaging [EEG-fMRI], and recording of pathological high-frequency oscillations), structural magnetic resonance imaging (MRI) (ultra-high-field imaging at 7 Tesla, novel imaging acquisition protocols, and advanced image analysis [post-processing] techniques), functional imaging (positron emission tomography and single-photon emission computed tomography co-registered to MRI), and fMRI significantly improved non-invasive presurgical evaluation and have opened the option of epilepsy surgery to patients previously not considered surgical candidates. Technical improvements of resective surgery techniques facilitate successful and safe operations in highly delicate brain areas like the perisylvian area in operculoinsular epilepsy. Novel less-invasive surgical techniques include stereotactic radiosurgery, MR-guided laser interstitial thermal therapy, and stereotactic intracerebral EEG-guided radiofrequency thermocoagulation.
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Affiliation(s)
- Christoph Baumgartner
- Department of Neurology, General Hospital Hietzing with Neurological Center Rosenhügel, Vienna, Austria.,Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria.,Medical Faculty, Sigmund Freud University, Vienna, Austria
| | - Johannes P Koren
- Department of Neurology, General Hospital Hietzing with Neurological Center Rosenhügel, Vienna, Austria.,Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria
| | - Martha Britto-Arias
- Department of Neurology, General Hospital Hietzing with Neurological Center Rosenhügel, Vienna, Austria.,Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria
| | - Lea Zoche
- Department of Neurology, General Hospital Hietzing with Neurological Center Rosenhügel, Vienna, Austria.,Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria
| | - Susanne Pirker
- Department of Neurology, General Hospital Hietzing with Neurological Center Rosenhügel, Vienna, Austria.,Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria
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102
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Holanda VM, Gungor A, Baydin S, Middlebrooks EH, Danish SF. Anatomic Investigation of the Trajectory for Stereotactic Laser Amygdalohippocampectomy. Oper Neurosurg (Hagerstown) 2019; 15:194-206. [PMID: 29140463 DOI: 10.1093/ons/opx218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 09/16/2017] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Magnetic resonance imaging-guided laser interstitial thermal therapy (LITT) has emerged as a promising treatment for mesial temporal lobe epilepsy. Surgeons must understand the relevant anatomy that is traversed by the catheter and affected by ablation. OBJECTIVE To study the anatomic structures crossed by the LITT catheter until it reaches the amygdala. METHODS Three human cadaveric heads were implanted with catheters using a frameless stereotactic technique. The Visualase® system (Medtronic, Dublin, Ireland) was utilized to ablate along the trajectory. Coronal and oblique axial slices were created. Fiber tract dissections were performed in a lateral-medial and inferior-superior scheme. Magnetic resonance tractography was acquired to illustrate the tracts dissected. RESULTS Entry points occurred within 4 cm of the transverse and sagittal sinus, inferior to the lambdoid suture. The cortex of the inferior occipital gyrus was crossed in the region of the transverse occipital sulcus. The vertical occipital fasciculus was crossed en route to passing through the optic radiations. The catheter crossed through or inferior to the optic radiations before piercing the parahippocampal gyrus at about 4 cm from the skull. The catheter entered the hippocampus as it pierced the superior margin of the parahippocampus at 6 cm. The catheter entered the head of the hippocampus to lie inferolateral to the amygdala in the last centimeter of the trajectory. CONCLUSION Understanding the anatomic principles of LITT catheter trajectories will improve the ability to perform this procedure. The current study is the first to examine the anatomy of this trajectory and will serve as the basis for future studies.
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Affiliation(s)
- Vanessa M Holanda
- Center of Neurology and Neurosurgery Associates (NeuroCENNA), Beneficência Portuguesa of São Paulo Hospital, São Paulo-SP, Brazil
| | - Abuzer Gungor
- Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, Istanbul, Turkey
| | - Serhat Baydin
- Department of Neurosurgery, Kanuni Sultan Suleyman Research and Training Hospital, Istanbul, Turkey
| | - Erik H Middlebrooks
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Shabbar F Danish
- Division of Neurosurgery, Rutgers-RWJ Medical School, New Brunswick, New Jersey
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103
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Milovanović JR, Janković SM, Milovanović D, Ružić Zečević D, Folić M, Kostić M, Ranković G, Stefanović S. Contemporary surgical management of drug-resistant focal epilepsy. Expert Rev Neurother 2019; 20:23-40. [DOI: 10.1080/14737175.2020.1676733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | - Dragan Milovanović
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | | | - Marko Folić
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Marina Kostić
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Goran Ranković
- Medical Faculty, University of Pristina, Kosovska Mitrovica, Serbia
| | - Srđan Stefanović
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
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104
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Voets NL, Alvarez I, Qiu D, Leatherday C, Willie JT, Sotiropoulos S, Gleichgerrcht E, Bonilha L, Pedersen NP, Kadom N, Saindane AM, Gross RE, Drane DL. Mechanisms and Risk Factors Contributing to Visual Field Deficits following Stereotactic Laser Amygdalohippocampotomy. Stereotact Funct Neurosurg 2019; 97:255-265. [PMID: 31618749 PMCID: PMC6979425 DOI: 10.1159/000502701] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 08/09/2019] [Indexed: 11/19/2022]
Abstract
Selective laser amygdalohippocampotomy (SLAH) is a minimally invasive surgical treatment for medial temporal lobe epilepsy. Visual field deficits (VFDs) are a significant potential complication. The objective of this study was to determine the relationship between VFDs and potential mechanisms of injury to the optic radiations and lateral geniculate nucleus. We performed a retrospective cross-sectional analysis of 3 patients (5.2%) who developed persistent VFDs after SLAH within our larger series (n = 58), 15 healthy individuals and 10 SLAH patients without visual complications. Diffusion tractography was used to evaluate laser catheter penetration of the optic radiations. Using a complementary approach, we evaluated evidence for focal microstructural tissue damage within the optic radiations and lateral geniculate nucleus. Overablation and potential heat radiation were assessed by quantifying ablation and choroidal fissure CSF volumes as well as energy deposited during SLAH.SLAH treatment parameters did not distinguish VFD patients. Atypically high overlap between the laser catheter and optic radiations was found in 1/3 VFD patients and was accompanied by focal reductions in fractional anisotropy where the catheter entered the lateral occipital white matter. Surprisingly, lateral geniculate tissue diffusivity was abnormal following, but also preceding, SLAH in patients who subsequently developed a VFD (all p = 0.005).In our series, vision-related complications following SLAH, which appear to occur less frequently than following open temporal lobe -surgery, were not directly explained by SLAH treatment parameters. Instead, our data suggest that variations in lateral geniculate structure may influence susceptibility to indirect heat injury from transoccipital SLAH.
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Affiliation(s)
- Natalie L Voets
- Wellcome Centre for Integrative Neuroimaging, FMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Ivan Alvarez
- Wellcome Centre for Integrative Neuroimaging, FMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Deqiang Qiu
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Christopher Leatherday
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Jon T Willie
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Stamatios Sotiropoulos
- Wellcome Centre for Integrative Neuroimaging, FMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom.,Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Ezequiel Gleichgerrcht
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Leonardo Bonilha
- Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Nigel P Pedersen
- Department of Neurology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Nadja Kadom
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, USA.,Children's Hospital of Atlanta, Atlanta, Georgia, USA
| | - Amit M Saindane
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Robert E Gross
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Daniel L Drane
- Department of Neurology, Emory University School of Medicine, Atlanta, Georgia, USA, .,Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA, .,Department of Neurology, University of Washington School of Medicine, Seattle, Washington, USA,
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105
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Salem U, Kumar VA, Madewell JE, Schomer DF, de Almeida Bastos DC, Zinn PO, Weinberg JS, Rao G, Prabhu SS, Colen RR. Neurosurgical applications of MRI guided laser interstitial thermal therapy (LITT). Cancer Imaging 2019; 19:65. [PMID: 31615562 PMCID: PMC6792239 DOI: 10.1186/s40644-019-0250-4] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 08/30/2019] [Indexed: 02/02/2023] Open
Abstract
MRI-guided laser interstitial thermal therapy (LITT) is the selective ablation of a lesion or a tissue using heat emitted from a laser device. LITT is considered a less invasive technique compared to open surgery that provides a nonsurgical solution for patients who cannot tolerate surgery. Although laser ablation has been used to treat brain lesions for decades, recent advances in MRI have improved lesion targeting and enabled real-time accurate monitoring of the thermal ablation process. These advances have led to a plethora of research involving the technique, safety, and potential applications of LITT.LITT is a minimally invasive treatment modality that shows promising results and is associated with decreased morbidity. It has various applications, such as treatment of glioma, brain metastases, radiation necrosis, and epilepsy. It can provide a safer alternative treatment option for patients in whom the lesion is not accessible by surgery, who are not surgical candidates, or in whom other standard treatment options have failed. Our aim is to review the current literature on LITT and provide a descriptive review of the technique, imaging findings, and clinical applications for neurosurgery.
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Affiliation(s)
- Usama Salem
- Department of Radiology, The University of Texas Medical Branch at Galveston, Galveston, TX, 77555, USA.
| | - Vinodh A Kumar
- Department of Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - John E Madewell
- Department of Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Donald F Schomer
- Department of Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | | | - Pascal O Zinn
- Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, PA, 15232, USA
| | - Jeffrey S Weinberg
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Ganesh Rao
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Sujit S Prabhu
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Rivka R Colen
- Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, PA, 15232, USA. .,Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA, 15232, USA.
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Huang Y, Leung SA, Parker JJ, Ho AL, Wintermark M, Patel SH, Pauly KB, Kakusa BW, Beres SJ, Henderson JM, Grant GA, Halpern CH. Anatomic and Thermometric Analysis of Cranial Nerve Palsy after Laser Amygdalohippocampotomy for Mesial Temporal Lobe Epilepsy. Oper Neurosurg (Hagerstown) 2019; 18:684-691. [DOI: 10.1093/ons/opz279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/31/2019] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Laser interstitial thermal therapy (LITT) is a minimally invasive therapy for treating medication-resistant mesial temporal lobe epilepsy. Cranial nerve (CN) palsy has been reported as a procedural complication, but the mechanism of this complication is not understood.
OBJECTIVE
To identify the cause of postoperative CN palsy after LITT.
METHODS
Four medial temporal lobe epilepsy patients with CN palsy after LITT were identified for comparison with 22 consecutive patients with no palsy. We evaluated individual variation in the distance between CN III and the uncus, and CN IV and the parahippocampal gyrus using preoperative T1- and T2-weighted magnetic resonance (MR) images. Intraoperative MR thermometry was used to estimate temperature changes.
RESULTS
CN III (n = 2) and CN IV palsies (n = 2) were reported. On preoperative imaging, the majority of identified CN III (54%) and CN IV (43%) were located within 1 to 2 mm of the uncus and parahippocampal gyrus tissue border, respectively. Affected CN III and CN IV were more likely to be found < 1 mm of the tissue border (PCNIII = .03, PCNIV < .01; chi-squared test). Retrospective assessment of thermal profile during ablation showed higher temperature rise along the mesial temporal lobe tissue border in affected CNs than unaffected CNs after controlling for distance (12.9°C vs 5.8°C; P = .03; 2-sample t-test).
CONCLUSION
CN palsy after LITT likely results from direct heating of the respective CN running at extreme proximity to the mesial temporal lobe. Low-temperature thresholds set at the border of the mesial temporal lobe in patients whose CNs are at close proximity may reduce this risk.
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Affiliation(s)
- Yuhao Huang
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
| | - Steven A Leung
- Department of Bioengineering, School of Medicine, Stanford University, Stanford, California
| | - Jonathon J Parker
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
| | - Allen L Ho
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
| | - Max Wintermark
- Department of Radiology, School of Medicine, Stanford University, Stanford, California
| | - Sohil H Patel
- Department of Radiology and Medical Imaging, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Kim Butts Pauly
- Department of Radiology, School of Medicine, Stanford University, Stanford, California
| | - Bina W Kakusa
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
| | - Shannon J Beres
- Department of Neurology, School of Medicine, Stanford University, Stanford, California
| | - Jaimie M Henderson
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
| | - Gerald A Grant
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
| | - Casey H Halpern
- Department of Neurosurgery, School of Medicine, Stanford University, Stanford, California
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107
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Bermudez CI, Jermakowicz WJ, Kolcun JPG, Sur S, Cajigas I, Millan C, Ribot R, Serrano EA, Velez-Ruiz N, Lowe MR, Tornes L, Palomeque M, Kanner AM, Jagid JR, Rey GJ. Cognitive outcomes following laser interstitial therapy for mesiotemporal epilepsies. Neurol Clin Pract 2019; 10:314-323. [PMID: 32983611 DOI: 10.1212/cpj.0000000000000728] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 08/06/2019] [Indexed: 11/15/2022]
Abstract
Objective To provide a review of cognitive outcomes across a full neuropsychological profile in patients who underwent laser interstitial thermal therapy (LiTT) for mesiotemporal epilepsy (mTLE). Methods We examined cognitive outcomes following LiTT for mTLE by reviewing a consecutive series of 26 patients who underwent dominant or nondominant hemisphere procedures. Each patient's pre- and postsurgical performance was examined for clinically significant change (>1SD improvement or decline on standardized scores), with a neuropsychologic battery that included measures of language, memory, executive functioning, and processing speed. Results Presurgical performance was largely consistent with previous research, where patients suffering from dominant hemisphere epilepsies demonstrated deficits in verbal learning and memory, whereas patients with nondominant hemisphere scored lower on visually mediated tests. Case-by-case review comparing presurgical to postsurgical scores revealed clinically significant improvement in both dominant and nondominant patients in learning and memory and other aspects of cognition such as processing speed and executive functioning. Of the few patients who did experience clinically significant decline following LiTT, a greater proportion had undergone dominant hemisphere procedures. Conclusions Compared with the outcome literature of dominant open anterior temporal lobectomies (ATLs), where postsurgical decline has been documented in up to 40%-60% of cases, our LiTT case series exhibited a much lower incidence of postoperative language or verbal memory decline. Moreover, promising rates of postoperative improvements were also observed across multiple cognitive domains. Future studies exploring cognitive outcomes following LiTT should include comprehensive neuropsychological findings, rather than only select domains, as clinically significant change can occur in areas other than those typically associated with mesiotemporal structures.
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Affiliation(s)
- Christin I Bermudez
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Walter J Jermakowicz
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - John Paul G Kolcun
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Samir Sur
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Iahn Cajigas
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Carlos Millan
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Ramses Ribot
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Enrique A Serrano
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Naymee Velez-Ruiz
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Merredith R Lowe
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Leticia Tornes
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Maru Palomeque
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Andres M Kanner
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Jonathan R Jagid
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
| | - Gustavo J Rey
- Division of Neuropsychology (CIB, GJR), Department of Neurology; Epilepsy Division (CIB, CM, RR, EAS, NV-R, MRL, LT, MP, AMK, GJR), Department of Neurology; Neuromuscular Division (CIB), Department of Neurology; and Department of Neurological Surgery (WJJ, JPGK, SS, IC, JRJ), University of Miami, Miller School of Medicine, FL
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108
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Abstract
[Box: see text].
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109
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Sheikh SR, Nair D, Gross RE, Gonzalez‐Martinez J. Tracking a changing paradigm and the modern face of epilepsy surgery: A comprehensive and critical review on the hunt for the optimal extent of resection in mesial temporal lobe epilepsy. Epilepsia 2019; 60:1768-1793. [DOI: 10.1111/epi.16310] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/13/2019] [Accepted: 07/14/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Shehryar R. Sheikh
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University Cleveland Ohio
| | - Dileep Nair
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University Cleveland Ohio
- Epilepsy Center Cleveland Clinic Foundation Cleveland Ohio
| | | | - Jorge Gonzalez‐Martinez
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University Cleveland Ohio
- Epilepsy Center Cleveland Clinic Foundation Cleveland Ohio
- Department of Neurosurgery Cleveland Clinic Foundation Cleveland Ohio
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110
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Vakharia VN, Sparks RE, Li K, O'Keeffe AG, Pérez-García F, França LGS, Ko AL, Wu C, Aronson JP, Youngerman BE, Sharan A, McKhann G, Ourselin S, Duncan JS. Multicenter validation of automated trajectories for selective laser amygdalohippocampectomy. Epilepsia 2019; 60:1949-1959. [PMID: 31392717 PMCID: PMC6771574 DOI: 10.1111/epi.16307] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 07/08/2019] [Accepted: 07/10/2019] [Indexed: 11/29/2022]
Abstract
Objective Laser interstitial thermal therapy (LITT) is a novel minimally invasive alternative to open mesial temporal resection in drug‐resistant mesial temporal lobe epilepsy (MTLE). The safety and efficacy of the procedure are dependent on the preplanned trajectory and the extent of the planned ablation achieved. Ablation of the mesial hippocampal head has been suggested to be an independent predictor of seizure freedom, whereas sparing of collateral structures is thought to result in improved neuropsychological outcomes. We aim to validate an automated trajectory planning platform against manually planned trajectories to objectively standardize the process. Methods Using the EpiNav platform, we compare automated trajectory planning parameters derived from expert opinion and machine learning to undertake a multicenter validation against manually planned and implemented trajectories in 95 patients with MTLE. We estimate ablation volumes of regions of interest and quantify the size of the avascular corridor through the use of a risk score as a marker of safety. We also undertake blinded external expert feasibility and preference ratings. Results Automated trajectory planning employs complex algorithms to maximize ablation of the mesial hippocampal head and amygdala, while sparing the parahippocampal gyrus. Automated trajectories resulted in significantly lower calculated risk scores and greater amygdala ablation percentage, whereas overall hippocampal ablation percentage did not differ significantly. In addition, estimated damage to collateral structures was reduced. Blinded external expert raters were significantly more likely to prefer automated to manually planned trajectories. Significance Retrospective studies of automated trajectory planning show much promise in improving safety parameters and ablation volumes during LITT for MTLE. Multicenter validation provides evidence that the algorithm is robust, and blinded external expert ratings indicate that the trajectories are clinically feasible. Prospective validation studies are now required to determine if automated trajectories translate into improved seizure freedom rates and reduced neuropsychological deficits.
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Affiliation(s)
- Vejay N Vakharia
- Department of Clinical and Experimental Epilepsy, Queen Square Institute of Neurology, University College London, London, UK.,National Hospital for Neurology and Neurosurgery, London, UK.,Chalfont Centre for Epilepsy London, London, UK
| | - Rachel E Sparks
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Kuo Li
- The First Affiliated Hospital of Xi'an, Jiaotong University, Xi'an, China
| | - Aidan G O'Keeffe
- Department of Statistical Science, University College London, London, UK
| | - Fernando Pérez-García
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
| | - Lucas G S França
- Department of Clinical and Experimental Epilepsy, Queen Square Institute of Neurology, University College London, London, UK
| | - Andrew L Ko
- Department of Neurosurgery, University of Washington, Seattle, Washington
| | - Chengyuan Wu
- Division of Epilepsy and Neuromodulation Neurosurgery, Department of Neurosurgery, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Joshua P Aronson
- Department of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | | | - Ashwini Sharan
- Division of Epilepsy and Neuromodulation Neurosurgery, Department of Neurosurgery, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Guy McKhann
- Columbia University Medical Center, New York, New York
| | - Sebastien Ourselin
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, Queen Square Institute of Neurology, University College London, London, UK.,National Hospital for Neurology and Neurosurgery, London, UK.,Chalfont Centre for Epilepsy London, London, UK
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Forseth KJ, Kadipasaoglu CM, Conner CR, Hickok G, Knight RT, Tandon N. A lexical semantic hub for heteromodal naming in middle fusiform gyrus. Brain 2019; 141:2112-2126. [PMID: 29860298 DOI: 10.1093/brain/awy120] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 03/23/2018] [Indexed: 11/13/2022] Open
Abstract
Semantic memory underpins our understanding of objects, people, places, and ideas. Anomia, a disruption of semantic memory access, is the most common residual language disturbance and is seen in dementia and following injury to temporal cortex. While such anomia has been well characterized by lesion symptom mapping studies, its pathophysiology is not well understood. We hypothesize that inputs to the semantic memory system engage a specific heteromodal network hub that integrates lexical retrieval with the appropriate semantic content. Such a network hub has been proposed by others, but has thus far eluded precise spatiotemporal delineation. This limitation in our understanding of semantic memory has impeded progress in the treatment of anomia. We evaluated the cortical structure and dynamics of the lexical semantic network in driving speech production in a large cohort of patients with epilepsy using electrocorticography (n = 64), functional MRI (n = 36), and direct cortical stimulation (n = 30) during two generative language processes that rely on semantic knowledge: visual picture naming and auditory naming to definition. Each task also featured a non-semantic control condition: scrambled pictures and reversed speech, respectively. These large-scale data of the left, language-dominant hemisphere uniquely enable convergent, high-resolution analyses of neural mechanisms characterized by rapid, transient dynamics with strong interactions between distributed cortical substrates. We observed three stages of activity during both visual picture naming and auditory naming to definition that were serially organized: sensory processing, lexical semantic processing, and articulation. Critically, the second stage was absent in both the visual and auditory control conditions. Group activity maps from both electrocorticography and functional MRI identified heteromodal responses in middle fusiform gyrus, intraparietal sulcus, and inferior frontal gyrus; furthermore, the spectrotemporal profiles of these three regions revealed coincident activity preceding articulation. Only in the middle fusiform gyrus did direct cortical stimulation disrupt both naming tasks while still preserving the ability to repeat sentences. These convergent data strongly support a model in which a distinct neuroanatomical substrate in middle fusiform gyrus provides access to object semantic information. This under-appreciated locus of semantic processing is at risk in resections for temporal lobe epilepsy as well as in trauma and strokes that affect the inferior temporal cortex-it may explain the range of anomic states seen in these conditions. Further characterization of brain network behaviour engaging this region in both healthy and diseased states will expand our understanding of semantic memory and further development of therapies directed at anomia.
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Affiliation(s)
- Kiefer James Forseth
- Vivian L Smith Department of Neurosurgery, McGovern Medical School, Houston, TX, USA
| | | | | | - Gregory Hickok
- Department of Cognitive Sciences, University of California, Irvine, CA, USA
| | | | - Nitin Tandon
- Vivian L Smith Department of Neurosurgery, McGovern Medical School, Houston, TX, USA.,Memorial Hermann Hospital, Texas Medical Center, Houston, TX, USA
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Jermakowicz WJ, Ivan ME, Cajigas I, Ribot R, Jusue-Torres I, Desai MB, Ruiz A, D'Haese PF, Kanner AM, Jagid JR. Visual Deficit From Laser Interstitial Thermal Therapy for Temporal Lobe Epilepsy: Anatomical Considerations. Oper Neurosurg (Hagerstown) 2019; 13:627-633. [PMID: 28922876 DOI: 10.1093/ons/opx029] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 01/31/2017] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Laser interstitial thermal therapy (LITT) is quickly emerging as an effective surgical therapy for temporal lobe epilepsy (TLE). One of the most frequent complications of the procedure is postoperative visual field cuts, but the physiopathology of these deficits is unknown. OBJECTIVE To evaluate potential causes of visual deficits after LITT for TLE in an attempt to minimize this complication. METHODS This retrospective chart review compares the case of a 24-year-old male who developed homonymous hemianopsia following LITT for TLE to 17 prior patients who underwent the procedure and suffered no visual deficit. We examined both features of the surgical approach (trajectory, laser energy, ablation size) and of preoperative surgical anatomy, derived from volumetric tracings of mesiotemporal structures. RESULTS For the patient with postoperative homonymous hemianopsia imaging suggested inadvertent ablation of the lateral geniculate nucleus, although the laser was positioned entirely within the hippocampus. This patient's laser trajectory, ablation number, energy delivered, and ablation size were not significantly different from the prior patients. However, the subject with the visual deficit did have significantly smaller choroidal fissure cerebrospinal fluid volume. CONCLUSION Visual deficits are the most common complication of LITT for mesiotemporal epilepsy and patients at most risk may have small cerebrospinal fluid volume in the choroidal fissure, allowing heat to spread from the hippocampal body to the lateral geniculate nucleus. When such anatomy is identified on preoperative magnetic resonance imaging, we recommend lowering laser trajectory, decreasing ablation power through the hippocampal body, and using temperature safety markers at the lower thalamic border.
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Affiliation(s)
| | - Michael E Ivan
- Department of Neurological Surgery, University of Miami, Miami, Florida
| | - Iahn Cajigas
- Department of Neurological Surgery, University of Miami, Miami, Florida
| | - Ramses Ribot
- Department of Neurology, Epilepsy Division, University of Miami, Miami, Florida
| | | | - Mehul B Desai
- Department of Radiology, Division of Neuroradiology, Miller School of Medi-cine, University of Miami, Miami, Florida
| | - Armando Ruiz
- Department of Radiology, Division of Neuroradiology, Miller School of Medi-cine, University of Miami, Miami, Florida
| | - Pierre-Francois D'Haese
- Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee
| | - Andres M Kanner
- Department of Neurology, Epilepsy Division, University of Miami, Miami, Florida
| | - Jonathan R Jagid
- Department of Neurological Surgery, University of Miami, Miami, Florida
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Ranjan M, Boutet A, Bhatia S, Wilfong A, Hader W, Lee MR, Rezai AR, Adelson PD. Neuromodulation beyond neurostimulation for epilepsy: scope for focused ultrasound. Expert Rev Neurother 2019; 19:937-943. [PMID: 31232614 DOI: 10.1080/14737175.2019.1635013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Introduction: Epilepsy is one of the most common neurological disorders and is often difficult to control with medication. Intractable epilepsy often results in compromised quality of life (QOL), neurologic morbidity and even mortality. In carefully selected cases, resective surgery offers the best potential for cure or seizure control. However, a large proportion of patients are not suitable for resective epilepsy surgery. Neuromodulation techniques are increasingly being used to treat such refractory cases. Recently, the FDA approved Magnetic Resonance-guided Focused Ultrasound (MRgFUS) for essential tremor and this novel technology is also being explored in several other neuropsychiatric conditions and neurological disorders, including epilepsy. Area covered: While the literature is scant and scattered, the pertinent literature of the MRgFUS is reviewed with an emphasis on research relevant to its application for epilepsy. Expert opinion: Limited preliminary clinical experiences and research studies with MRgFUS ablation or neuromodulation for epilepsy have shown promising results; however, this procedure remains experimental requiring further investigations. Safe and reversible opening of the blood-brain barrier (BBB) with MRgFUS adds an additional therapeutic avenue by allowing targeted delivery of neurotherapeutics in neurological disorders, potentially including epilepsy. Ongoing clinical trials and research coupled with technological advancements contribute to strengthening the MRgFUS epilepsy field. MRgFUS could be the future technology of choice for 'ablation' or 'sononeuromodulation', and/or a 'targeted therapeutics' for epilepsy.
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Affiliation(s)
- Manish Ranjan
- Department of Neurosurgery, West Virginia University , Morgantown , WV , USA.,Neurosurgery, Rockefeller Neuroscience Institute , Morgantown , WV , USA
| | - Alexandre Boutet
- Joint Department of Medical Imaging, University of Toronto , Toronto , ON , Canada
| | - Sanjiv Bhatia
- Division of Pediatric Neurological Surgery, Nicklaus Children's Hospital Brain Institute, University of Miami , Miami , FL , USA
| | - Angus Wilfong
- Division of Neurology, BARROW Neurological Institute at Phoenix Children's Hospital , Phoenix , AZ , USA
| | - Walter Hader
- Division of Pediatric Neurosurgery, Department of clinical neurosciences, University of Calgary , Calgary , AB , Canada
| | - Mark R Lee
- Department of Neurosurgery, West Virginia University , Morgantown , WV , USA.,Neurosurgery, Rockefeller Neuroscience Institute , Morgantown , WV , USA
| | - Ali R Rezai
- Department of Neurosurgery, West Virginia University , Morgantown , WV , USA.,Neurosurgery, Rockefeller Neuroscience Institute , Morgantown , WV , USA
| | - P David Adelson
- Division of Pediatric Neurosurgery, BARROW Neurological Institute at Phoenix Children's Hospital , Phoenix , AZ , USA
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Azmi H, Gibbons M, DeVito MC, Schlesinger M, Kreitner J, Freguletti T, Banovic J, Ferrell D, Horton M, Pierce S, Roth P. The interventional magnetic resonance imaging suite: Experience in the design, development, and implementation in a pre-existing radiology space and review of concepts. Surg Neurol Int 2019; 10:101. [PMID: 31528439 PMCID: PMC6744761 DOI: 10.25259/sni-209-2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 03/29/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Intraoperative magnetic resonance imaging (ioMRI) has led to significant advancements in neurosurgery with improved accuracy, assessment of the extent of resection, less invasive surgical alternatives, and real-time confirmation of targeting as well delivery of therapies. The costs associated with developing ioMRI units in the surgical suite have been obstacles to the expansion of their use. More recently, the development of hybrid interventional MRI (iMRI) units has become a viable alternative. The process of designing, developing, and implementing operations for these units requires the careful integration of environmental, technical, and safety elements of both surgical and MR practices. There is a paucity of published literature providing guidance for institutions looking to develop a hybrid iMRI unit, especially with a limited footprint in the radiology department. METHODS The experience of designing, developing, and implementing an iMRI in a preexisting space for neurosurgical procedures at a single institution in light of available options and the literature is described. RESULTS The development of the unit was accomplished through the engagement of a multidisciplinary team of stakeholders who utilized existing guidelines and recommendations and their own professional experience to address issues including physical layout, equipment selection, operations planning, infection control, and oversight/review, among others. CONCLUSION Successful creation of an iMRI program requires multidisciplinary collaboration in integrating surgical and MR practice. The authors' aim is that the experience described in this article will serve as an example for facilities or neurosurgical departments looking to navigate the same process.
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Affiliation(s)
- Hooman Azmi
- Departments of Neurosurgery, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Mary Gibbons
- Departments of Radiology, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Michele C. DeVito
- Departments of Radiology, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Mark Schlesinger
- Departments of Anesthesiology, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Jason Kreitner
- Departments of Operations, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Terri Freguletti
- Departments of Perioperative Services, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Joan Banovic
- Departments of Perioperative Services, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Donald Ferrell
- Departments of Operations, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Michael Horton
- Departments of Radiology, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Sean Pierce
- Departments of Radiology, Hackensack University Medical Center, Hackensack, New Jersey, United States
| | - Patrick Roth
- Departments of Neurosurgery, Hackensack University Medical Center, Hackensack, New Jersey, United States
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Langfitt JT, Quigg M, Yan G, Yu W, Ward MM, Barbaro NM, Chang EF, Broshek DK, Laxer KD, Cole AJ, Sneed PK, Hess C, Tripathi M, Heck CN, Miller JW, Garcia PA, McEvoy A, Fountain NB, Salanova V, Knowlton RC, Bagić A, Henry T, Kapoor S, McKhann G, Palade AE, Reuber M, Tecoma E. Direct and indirect costs associated with stereotactic radiosurgery or open surgery for medial temporal lobe epilepsy: Results from the ROSE trial. Epilepsia 2019; 60:1453-1461. [PMID: 31185129 DOI: 10.1111/epi.16072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/01/2019] [Accepted: 05/22/2019] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To determine whether a less-invasive approach to surgery for medically refractory temporal lobe epilepsy is associated with lower health care costs and costs of lost productivity over time, compared to open surgery. METHODS We compared direct medical costs and indirect productivity costs associated with treatment with stereotactic radiosurgery (SRS) or anterior temporal lobectomy (ATL) in the ROSE (Radiosurgery or Open Surgery for Epilepsy) trial. Health care use was abstracted from hospital bills, the study database, and diaries in which participants recorded health care use and time lost from work while seeking care. Costs of use were calculated using a Medicare costing approach used in a prior study of the costs of ATL. The power of many analyses was limited by the sample size and data skewing. RESULTS Combined treatment and follow-up costs (in thousands of US dollars) did not differ between SRS (n = 20, mean = $76.6, 95% confidence interval [CI] = 50.7-115.6) and ATL (n = 18, mean = $79.0, 95% CI = 60.09-103.8). Indirect costs also did not differ. More ATL than SRS participants were free of consciousness-impairing seizures in each year of follow-up (all P < 0.05). Costs declined following ATL (P = 0.005). Costs tended to increase over the first 18 months following SRS (P = 0.17) and declined thereafter (P = 0.06). This mostly reflected hospitalizations for SRS-related adverse events in the second year of follow-up. SIGNIFICANCE Lower initial costs of SRS for medial temporal lobe epilepsy were largely offset by hospitalization costs related to adverse events later in the course of follow-up. Future studies of less-invasive alternatives to ATL will need to assess adverse events and major costs systematically and prospectively to understand the economic implications of adopting these technologies.
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Affiliation(s)
| | - Mark Quigg
- University of Virginia, Charlottesville, Virginia
| | - Guofen Yan
- University of Virginia, Charlottesville, Virginia
| | - Wei Yu
- University of Virginia, Charlottesville, Virginia
| | - Mariann M Ward
- University of California, San Francisco, San Francisco, California
| | | | - Edward F Chang
- University of California, San Francisco, San Francisco, California
| | | | - Kenneth D Laxer
- California Pacific Medical Center, San Francisco, California
| | - Andrew J Cole
- Massachusetts General Hospital, Boston, Massachusetts
| | - Penny K Sneed
- University of California, San Francisco, San Francisco, California
| | - Christopher Hess
- University of California, San Francisco, San Francisco, California
| | | | | | | | - Paul A Garcia
- University of California, San Francisco, San Francisco, California
| | | | | | | | | | - Anto Bagić
- University of Pittsburgh, Pittsburgh, Pennsylvania
| | | | | | | | | | | | - Evelyn Tecoma
- University of California, San Diego, San Diego, California
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Wu C, Jermakowicz WJ, Chakravorti S, Cajigas I, Sharan AD, Jagid JR, Matias CM, Sperling MR, Buckley R, Ko A, Ojemann JG, Miller JW, Youngerman B, Sheth SA, McKhann GM, Laxton AW, Couture DE, Popli GS, Smith A, Mehta AD, Ho AL, Halpern CH, Englot DJ, Neimat JS, Konrad PE, Neal E, Vale FL, Holloway KL, Air EL, Schwalb J, Dawant BM, D’Haese PF. Effects of surgical targeting in laser interstitial thermal therapy for mesial temporal lobe epilepsy: A multicenter study of 234 patients. Epilepsia 2019; 60:1171-1183. [PMID: 31112302 PMCID: PMC6551254 DOI: 10.1111/epi.15565] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/23/2019] [Accepted: 04/23/2019] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Laser interstitial thermal therapy (LITT) for mesial temporal lobe epilepsy (mTLE) has reported seizure freedom rates between 36% and 78% with at least 1 year of follow-up. Unfortunately, the lack of robust methods capable of incorporating the inherent variability of patient anatomy, the variability of the ablated volumes, and clinical outcomes have limited three-dimensional quantitative analysis of surgical targeting and its impact on seizure outcomes. We therefore aimed to leverage a novel image-based methodology for normalizing surgical therapies across a large multicenter cohort to quantify the effects of surgical targeting on seizure outcomes in LITT for mTLE. METHODS This multicenter, retrospective cohort study included 234 patients from 11 centers who underwent LITT for mTLE. To investigate therapy location, all ablation cavities were manually traced on postoperative magnetic resonance imaging (MRI), which were subsequently nonlinearly normalized to a common atlas space. The association of clinical variables and ablation location to seizure outcome was calculated using multivariate regression and Bayesian models, respectively. RESULTS Ablations including more anterior, medial, and inferior temporal lobe structures, which involved greater amygdalar volume, were more likely to be associated with Engel class I outcomes. At both 1 and 2 years after LITT, 58.0% achieved Engel I outcomes. A history of bilateral tonic-clonic seizures decreased chances of Engel I outcome. Radiographic hippocampal sclerosis was not associated with seizure outcome. SIGNIFICANCE LITT is a viable treatment for mTLE in patients who have been properly evaluated at a comprehensive epilepsy center. Consideration of surgical factors is imperative to the complete assessment of LITT. Based on our model, ablations must prioritize the amygdala and also include the hippocampal head, parahippocampal gyrus, and rhinal cortices to maximize chances of seizure freedom. Extending the ablation posteriorly has diminishing returns. Further work is necessary to refine this analysis and define the minimal zone of ablation necessary for seizure control.
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Affiliation(s)
- Chengyuan Wu
- Department of Neurological Surgery, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University
| | | | - Srijata Chakravorti
- Department of Electrical Engineering and Computer Science, Vanderbilt University
| | - Iahn Cajigas
- Department of Neurological Surgery, University of Miami/Jackson Memorial Hospital
| | - Ashwini D. Sharan
- Department of Neurological Surgery, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University
| | - Jonathan R. Jagid
- Department of Neurological Surgery, University of Miami/Jackson Memorial Hospital
| | - Caio M. Matias
- Department of Neurological Surgery, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University
| | - Michael R. Sperling
- Department of Neurology, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University
| | - Robert Buckley
- Department of Neurological Surgery, University of Washington/Harborview Medical Center
| | - Andrew Ko
- Department of Neurological Surgery, University of Washington/Harborview Medical Center
| | - Jeffrey G. Ojemann
- Department of Neurological Surgery, University of Washington/Harborview Medical Center
| | - John W. Miller
- Department of Neurology, University of Washington/Harborview Medical Center
| | - Brett Youngerman
- Department of Neurological Surgery, Neurological Institute of New York, Columbia University Medical Center
| | - Sameer A. Sheth
- Department of Neurological Surgery Baylor College of Medicine
| | - Guy M. McKhann
- Department of Neurological Surgery, Neurological Institute of New York, Columbia University Medical Center
| | - Adrian W. Laxton
- Department of Neurological Surgery Wake Forest University School of Medicine
| | - Daniel E. Couture
- Department of Neurological Surgery Wake Forest University School of Medicine
| | - Gautam S. Popli
- Department of Neurology, Wake Forest University School of Medicine
| | - Alexander Smith
- Department of Neurological Surgery, Zucker School of Medicine at Hofstra Northwell
| | - Ashesh D. Mehta
- Department of Neurological Surgery, Zucker School of Medicine at Hofstra Northwell
| | - Allen L. Ho
- Department of Neurological Surgery, Stanford Neuroscience Health Center
| | - Casey H. Halpern
- Department of Neurological Surgery, Stanford Neuroscience Health Center
| | | | | | | | - Elliot Neal
- Department of Neurological Surgery, University of South Florida Health South Tampa Center
| | - Fernando L. Vale
- Department of Neurological Surgery, University of South Florida Health South Tampa Center
| | | | - Ellen L. Air
- Department of Neurological Surgey, Henry Ford Health System
| | - Jason Schwalb
- Department of Neurological Surgey, Henry Ford Health System
| | - Benoit M. Dawant
- Department of Electrical Engineering and Computer Science, Vanderbilt University
- Department of Neurological Surgery, Vanderbilt University
| | - Pierre-Francois D’Haese
- Department of Electrical Engineering and Computer Science, Vanderbilt University
- Department of Neurological Surgery, Vanderbilt University
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Grewal SS, Zimmerman RS, Worrell G, Brinkmann BH, Tatum WO, Crepeau AZ, Woodrum DA, Gorny KR, Felmlee JP, Watson RE, Hoxworth JM, Gupta V, Vibhute P, Trenerry MR, Kaufmann TJ, Marsh WR, Wharen RE, Van Gompel JJ. Laser ablation for mesial temporal epilepsy: a multi-site, single institutional series. J Neurosurg 2019; 130:2055-2062. [PMID: 29979119 DOI: 10.3171/2018.2.jns171873] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 02/16/2018] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Although it is still early in its application, laser interstitial thermal therapy (LiTT) has increasingly been employed as a surgical option for patients with mesial temporal lobe epilepsy. This study aimed to describe mesial temporal lobe ablation volumes and seizure outcomes following LiTT across the Mayo Clinic's 3 epilepsy surgery centers. METHODS This was a multi-site, single-institution, retrospective review of seizure outcomes and ablation volumes following LiTT for medically intractable mesial temporal lobe epilepsy between October 2011 and October 2015. Pre-ablation and post-ablation follow-up volumes of the hippocampus were measured using FreeSurfer, and the volume of ablated tissue was also measured on intraoperative MRI using a supervised spline-based edge detection algorithm. To determine seizure outcomes, results were compared between those patients who were seizure free and those who continued to experience seizures. RESULTS There were 23 patients who underwent mesial temporal LiTT within the study period. Fifteen patients (65%) had left-sided procedures. The median follow-up was 34 months (range 12-70 months). The mean ablation volume was 6888 mm3. Median hippocampal ablation was 65%, with a median amygdala ablation of 43%. At last follow-up, 11 (48%) of these patients were seizure free. There was no correlation between ablation volume and seizure freedom (p = 0.69). There was also no correlation between percent ablation of the amygdala (p = 0.28) or hippocampus (p = 0.82) and seizure outcomes. Twelve patients underwent formal testing with computational visual fields. Visual field changes were seen in 67% of patients who underwent testing. Comparing the 5 patients with clinically noticeable visual field deficits to the rest of the cohort showed no significant difference in ablation volume between those patients with visual field deficits and those without (p = 0.94). There were 11 patients with follow-up neuropsychological testing. Within this group, verbal learning retention was 76% in the patients with left-sided procedures and 89% in those with right-sided procedures. CONCLUSIONS In this study, there was no significant correlation between the ablation volume after LiTT and seizure outcomes. Visual field deficits were common in formally tested patients, much as in patients treated with open temporal lobectomy. Further studies are required to determine the role of amygdalohippocampal ablation.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Vivek Gupta
- 9Radiology, Mayo Clinic, Jacksonville, Florida
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Jobst BC, Ben-Menachem E, Chapman KE, Fu A, Goldman A, Hirsch LJ, Jehi LE, Kossoff EH, Plueger M, Rho JM, Schevon CA, Shinnar S, Sperling MR, Simeone TA, Wagner JL, Lado F. Highlights From the Annual Meeting of the American Epilepsy Society 2018. Epilepsy Curr 2019; 19:152-158. [PMID: 31050308 PMCID: PMC6610384 DOI: 10.1177/1535759719844486] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The American Epilepsy Society Meeting in New Orleans attracted more than 5900 attendees. There was a lively exchange of new science, innovation, education, clinical practice, and many other items related to epilepsy. Educational symposia were a major part of the meeting and explored varying topics of interest for all types of epilepsy professionals. This article reviews highlights of the meeting presented in major symposia. Topics ranged from how to treat varying aspects of epilepsy as a consultant in the hospital to finding the scientific underpinning of the interaction between sleep and epilepsy. Pros and cons of novel antiseizure medications, dietary, and stimulation treatments were discussed. Epilepsy may impair memory and we need to learn what is the pathophysiologic relationship. Febrile status epilepticus may have severe consequences for a later life with seizures. Epilepsy professionals should be very well aware of the ethical implications of devasting seizures and their associated disability. These are just a few select topics of the many that we need to study further to archive the final goal to improve the lives of patients with epilepsy.
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Lee EJ, Kalia SK, Hong SH. A Primer on Magnetic Resonance-Guided Laser Interstitial Thermal Therapy for Medically Refractory Epilepsy. J Korean Neurosurg Soc 2019; 62:353-360. [PMID: 31085962 PMCID: PMC6514321 DOI: 10.3340/jkns.2019.0105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 04/29/2019] [Indexed: 01/04/2023] Open
Abstract
Epilepsy surgery that eliminates the epileptogenic focus or disconnects the epileptic network has the potential to significantly improve seizure control in patients with medically intractable epilepsy. Magnetic resonance-guided laser interstitial thermal therapy (MRgLITT) has been an established option for epilepsy surgery since the US Food and Drug Administration cleared the use of MRgLITT in neurosurgery in 2007. MRgLITT is an ablative stereotactic procedure utilizing heat that is converted from laser energy, and the temperature of the tissue is monitored in real-time by MR thermography. Real-time quantitative thermal monitoring enables titration of laser energy for cellular injury, and it also estimates the extent of tissue damage. MRgLITT is applicable for lesion ablation in cases that the epileptogenic foci are localized and/or deep-seated such as in the mesial temporal lobe epilepsy and hypothalamic hamartoma. Seizure-free outcomes after MRgLITT are comparable to those of open surgery in well-selected patients such as those with mesial temporal sclerosis. Particularly in patients with hypothalamic hamartoma. In addition, MRgLITT can also be applied to ablate multiple discrete lesions of focal cortical dysplasia and tuberous sclerosis complex without the need for multiple craniotomies, as well as disconnection surgery such as corpus callosotomy. Careful planning of the target, the optimal trajectory of the laser probe, and the appropriate parameters for energy delivery are paramount to improve the seizure outcome and to reduce the complication caused by the thermal damage to the surrounding critical structures.
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Comparing the Wada Test and Functional MRI for the Presurgical Evaluation of Memory in Temporal Lobe Epilepsy. Curr Neurol Neurosci Rep 2019; 19:31. [PMID: 31044310 DOI: 10.1007/s11910-019-0945-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE OF REVIEW The usefulness of the Wada test (WT) predicting memory impairment from temporal lobe epilepsy (TLE) surgery has been debated, and it has progressively been replaced by functional MRI (fMRI). We review the current role of WT and fMRI in the presurgical assessment of TLE, and how novel surgical techniques might improve cognitive outcomes. RECENT FINDINGS fMRI's ability to predict global amnesia has not been assessed. Although WT can produce false-positive results, it is still indicated in patients at risk for developing global amnesia: those with significant bilateral or contralateral memory deficits. In the current review, WT exhibited no added value, beyond preclinical data, for predicting material-specific memory impairment, whereas fMRI was reliable for either verbal or non-verbal memory decline. Abnormal functional connectivity on resting state fMRI (rs-fMRI) between the posterior cingulate and the hippocampus may be a predictor of postsurgical memory outcomes. Restricted resections to the pathogenic tissue, stereotactic laser, radiosurgery, and SEEG-guided thermos-coagulation were associated with better cognitive outcome. fMRI should be used routinely in the presurgical workup of TLE to predict verbal and/or non-verbal memory decline, whereas WT may be indicated when there is a high risk of postsurgical global amnesia. Rs-fMRI is a promising tool for the presurgical workup of TLE, and more restricted resections are recommended to enhance cognitive outcomes.
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Abstract
Epilepsy affects 65 million people worldwide, and is a leading neurologic cause of loss of quality-adjusted life years. The diagnosis of seizures and epilepsy often depends on a careful history, and is supported with electroencephalogram and imaging. First-line treatment of epilepsy includes medical management. Antiepileptic drugs must be chosen with the patient's particular comorbidities in mind. Drug-resistant epilepsy cases should be referred to an epilepsy specialist and may be evaluated for additional medications, epilepsy surgery, neurostimulation, or dietary therapy. When caring for women, providers must take into account needs for contraception or pregnancy safety where applicable.
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Affiliation(s)
- Emily L Johnson
- Department of Neurology, Johns Hopkins School of Medicine, 600 North Wolfe Street, Baltimore, MD 21287, USA.
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Magnetic Resonance–Guided Laser Interstitial Thermal Therapy Versus Stereotactic Radiosurgery for Medically Intractable Temporal Lobe Epilepsy: A Systematic Review and Meta-Analysis of Seizure Outcomes and Complications. World Neurosurg 2019; 122:e32-e47. [DOI: 10.1016/j.wneu.2018.08.227] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022]
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Willie JT, Malcolm JG, Stern MA, Lowder LO, Neill SG, Cabaniss BT, Drane DL, Gross RE. Safety and effectiveness of stereotactic laser ablation for epileptogenic cerebral cavernous malformations. Epilepsia 2019; 60:220-232. [PMID: 30653657 PMCID: PMC6365175 DOI: 10.1111/epi.14634] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 12/08/2018] [Accepted: 12/09/2018] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Magnetic resonance (MR) thermography-guided laser interstitial thermal therapy, or stereotactic laser ablation (SLA), is a minimally invasive alternative to open surgery for focal epilepsy caused by cerebral cavernous malformations (CCMs). We examined the safety and effectiveness of SLA of epileptogenic CCMs. METHODS We retrospectively analyzed 19 consecutive patients who presented with focal seizures associated with a CCM. Each patient underwent SLA of the CCM and adjacent cortex followed by standard clinical and imaging follow-up. RESULTS All but one patient had chronic medically refractory epilepsy (median duration 8 years, range 0.5-52 years). Lesions were located in the temporal (13), frontal (five), and parietal (one) lobes. CCMs induced magnetic susceptibility artifacts during thermometry, but perilesional cortex was easily visualized. Fourteen of 17 patients (82%) with >12 months of follow-up achieved Engel class I outcomes, of which 10 (59%) were Engel class IA. Two patients who were not seizure-free from SLA alone became so following intracranial electrode-guided open resection. Delayed postsurgical imaging validated CCM involution (median 83% volume reduction) and ablation of surrounding cortex. Histopathologic examination of one previously ablated CCM following open surgery confirmed obliteration. SLA caused no detectable hemorrhages. Two symptomatic neurologic deficits (visual and motor) were predictable, and neither was permanently disabling. SIGNIFICANCE In a consecutive retrospective series, MR thermography-guided SLA was an effective alternative to open surgery for epileptogenic CCM. The approach was free of hemorrhagic complications, and clinically significant neurologic deficits were predictable. SLA presents no barrier to subsequent open surgery when needed.
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Affiliation(s)
- Jon T. Willie
- Department of Neurological Surgery, Emory University School
of Medicine. Atlanta, GA
- Department of Neurology, Emory University School of
Medicine. Atlanta, GA
| | - James G. Malcolm
- Department of Neurological Surgery, Emory University School
of Medicine. Atlanta, GA
| | - Matthew A. Stern
- Medical Scientist Training Program, Emory University School
of Medicine. Atlanta, GA
| | - Lindsay O. Lowder
- Department of Pathology, Emory University School of
Medicine. Atlanta, GA
| | - Stewart G. Neill
- Department of Pathology, Emory University School of
Medicine. Atlanta, GA
| | - Brian T. Cabaniss
- Department of Neurology, Emory University School of
Medicine. Atlanta, GA
| | - Daniel L. Drane
- Department of Neurology, Emory University School of
Medicine. Atlanta, GA
- Department of Pediatrics, Emory University School of
Medicine. Atlanta, GA
- Department of Neurology, University of Washington School of
Medicine, Seattle, WA
| | - Robert E. Gross
- Department of Neurological Surgery, Emory University School
of Medicine. Atlanta, GA
- Department of Neurology, Emory University School of
Medicine. Atlanta, GA
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Drane DL, Pedersen NP. Knowledge of language function and underlying neural networks gained from focal seizures and epilepsy surgery. BRAIN AND LANGUAGE 2019; 189:20-33. [PMID: 30615986 PMCID: PMC7183240 DOI: 10.1016/j.bandl.2018.12.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 09/05/2018] [Accepted: 12/19/2018] [Indexed: 05/09/2023]
Abstract
The effects of epilepsy and its treatments have contributed significantly to language models. The setting of epilepsy surgery, which allows for careful pre- and postsurgical evaluation of patients with cognitive testing and neuroimaging, has produced a wealth of language findings. Moreover, a new wave of surgical interventions, including stereotactic laser ablation and radio frequency ablation, have contributed new insights and corrections to language models as they can make extremely precise, focal lesions. This review covers the common language deficits observed in focal dyscognitive seizure syndromes. It also addresses the effects of surgical interventions on language, and highlights insights gained from unique epilepsy assessment methods (e.g., cortical stimulation mapping, Wada evaluation). Emergent findings are covered including a lack of involvement of the hippocampus in confrontation word retrieval, possible roles for key white matter tracts in language, and the often-overlooked basal temporal language area. The relationship between language and semantic memory networks is also explored, with brief consideration given to the prevailing models of semantic processing, including the amodal Hub and distributed, multi-modal processing models.
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Affiliation(s)
- Daniel L Drane
- Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA; Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
| | - Nigel P Pedersen
- Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA
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Li K, Vakharia VN, Sparks R, França LGS, Granados A, McEvoy AW, Miserocchi A, Wang M, Ourselin S, Duncan JS. Optimizing Trajectories for Cranial Laser Interstitial Thermal Therapy Using Computer-Assisted Planning: A Machine Learning Approach. Neurotherapeutics 2019; 16:182-191. [PMID: 30520003 PMCID: PMC6361073 DOI: 10.1007/s13311-018-00693-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Laser interstitial thermal therapy (LITT) is an alternative to open surgery for drug-resistant focal mesial temporal lobe epilepsy (MTLE). Studies suggest maximal ablation of the mesial hippocampal head and amygdalohippocampal complex (AHC) improves seizure freedom rates while better neuropsychological outcomes are associated with sparing of the parahippocampal gyrus (PHG). Optimal trajectories avoid sulci and CSF cavities and maximize distance from vasculature. Computer-assisted planning (CAP) improves these metrics, but the combination of entry and target zones has yet to be determined to maximize ablation of the AHC while sparing the PHG. We apply a machine learning approach to predict entry and target parameters and utilize these for CAP. Ten patients with hippocampal sclerosis were identified from a prospectively managed database. CAP LITT trajectories were generated using entry regions that include the inferior occipital, middle occipital, inferior temporal, and middle temporal gyri. Target points were varied by sequential AHC erosions and transformations of the centroid of the amygdala. A total of 7600 trajectories were generated, and ablation volumes of the AHC and PHG were calculated. Two machine learning approaches (random forest and linear regression) were investigated to predict composite ablation scores and determine entry and target point combinations that maximize ablation of the AHC while sparing the PHG. Random forest and linear regression predictions had a high correlation with the calculated values in the test set (ρ = 0.7) for both methods. Maximal composite ablation scores were associated with entry points around the junction of the inferior occipital, middle occipital, and middle temporal gyri. The optimal target point was the anteromesial amygdala. These parameters were then used with CAP to generate clinically feasible trajectories that optimize safety metrics. Machine learning techniques accurately predict composite ablation score. Prospective studies are required to determine if this improves seizure-free outcome while reducing neuropsychological morbidity following LITT for MTLE.
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Affiliation(s)
- Kuo Li
- The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1E 6BT, UK
| | - Vejay N Vakharia
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1E 6BT, UK.
- National Hospital for Neurology and Neurosurgery, Queen Square, London, UK.
| | - Rachel Sparks
- Wellcome EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, London, UK
- School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College London, London, UK
| | - Lucas G S França
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1E 6BT, UK
| | - Alejandro Granados
- Wellcome EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, London, UK
| | - Andrew W McEvoy
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1E 6BT, UK
- National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - Anna Miserocchi
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1E 6BT, UK
- National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - Maode Wang
- The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Sebastien Ourselin
- School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College London, London, UK
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London, WC1E 6BT, UK
- National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
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Miller KJ, Halpern CH, Sedrak MF, Duncan JA, Grant GA. A novel mesial temporal stereotactic coordinate system. J Neurosurg 2019; 130:67-75. [PMID: 29372873 DOI: 10.3171/2017.7.jns162267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 07/06/2017] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Stereotactic laser ablation and neurostimulator placement represent an evolution in staged surgical intervention for epilepsy. As this practice evolves, optimal targeting will require standardized outcome measures that compare electrode lead or laser source with postprocedural changes in seizure frequency. The authors propose and present a novel stereotactic coordinate system based on mesial temporal anatomical landmarks to facilitate the planning and delineation of outcomes based on extent of ablation or region of stimulation within mesial temporal structures. METHODS The body of the hippocampus contains a natural axis, approximated by the interface of cornu ammonis area 4 and the dentate gyrus. The uncal recess of the lateral ventricle acts as a landmark to characterize the anterior-posterior extent of this axis. Several volumetric rotations are quantified for alignment with the mesial temporal coordinate system. First, the brain volume is rotated to align with standard anterior commissure-posterior commissure (AC-PC) space. Then, it is rotated through the axial and sagittal angles that the hippocampal axis makes with the AC-PC line. RESULTS Using this coordinate system, customized MATLAB software was developed to allow for intuitive standardization of targeting and interpretation. The angle between the AC-PC line and the hippocampal axis was found to be approximately 20°-30° when viewed sagittally and approximately 5°-10° when viewed axially. Implanted electrodes can then be identified from CT in this space, and laser tip position and burn geometry can be calculated based on the intraoperative and postoperative MRI. CONCLUSIONS With the advent of stereotactic surgery for mesial temporal targets, a mesial temporal stereotactic system is introduced that may facilitate operative planning, improve surgical outcomes, and standardize outcome assessment.
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Affiliation(s)
- Kai J Miller
- 1Department of Neurosurgery, Stanford University, Stanford; and
| | - Casey H Halpern
- 1Department of Neurosurgery, Stanford University, Stanford; and
| | - Mark F Sedrak
- 1Department of Neurosurgery, Stanford University, Stanford; and
- 2Department of Neurosurgery, Kaiser Permanente, Redwood City, California
| | - John A Duncan
- 2Department of Neurosurgery, Kaiser Permanente, Redwood City, California
| | - Gerald A Grant
- 1Department of Neurosurgery, Stanford University, Stanford; and
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Xue F, Chen T, Sun H. Postoperative Outcomes of Magnetic Resonance Imaging (MRI)-Guided Laser Interstitial Thermal Therapy (LITT) in the Treatment of Drug-Resistant Epilepsy: A Meta-Analysis. Med Sci Monit 2018; 24:9292-9299. [PMID: 30573725 PMCID: PMC6320664 DOI: 10.12659/msm.911848] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 08/28/2018] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Drug-resistant epilepsy is a common neurological disease in adults and children. This study aimed to undertake a systematic review of the literature with meta-analysis of the data from published studies to assess the effectiveness of magnetic resonance imaging (MRI)-guided laser interstitial thermal therapy (LITT) in treatment-resistant epilepsy. MATERIAL AND METHODS The study was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed, MEDLINE, and EMBASE databases were systematically searched for indexed publications in the English language up to May 2018. Data on the prevalence, outcome using the Engel Epilepsy Surgery Outcome Scale (Class I to IV), and postoperative complications were analyzed with 95% confidence intervals (CIs). The Methodological Index for Non-Randomized Studies (MINORS) was used to assess the risk of bias in the included studies. RESULTS Sixteen published studies that included a total of 269 patients with treatment resistant epilepsy were identified. The prevalence of Engel Class I, II, III and IV were 61% (95% CI, 0.54-0.68; I²=14.5%; P=0.302), 12% (95% CI, 0.07-0.16; I²=86.8%; P=0.000), 16% (95% CI, 0.10-0.22; I²=3.0%; P=0.397), and 15% (95% CI, 0.08-0.22; I²=13.2%; P=0.330), respectively. The prevalence of postoperative complications was 24% (95% CI, 0.16-0.32; I2=0%; P=0.629). CONCLUSIONS Meta-analysis of data from 16 studies that included 269 patients with treatment-resistant epilepsy showed that MRI-guided LITT significantly reduced the frequency of seizures and reduced postoperative complications, supporting the safety and effectiveness of MRI-guided LITT in the treatment of drug-resistant epilepsy.
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Affiliation(s)
- Feng Xue
- Department of Neurosurgery, Tianjin Hospital of Integrated Traditional Chinese and Western Medicine (ITCWM) Nan Kai Hospital, Tianjin, P.R. China
| | - Tingting Chen
- Department of Oncology, Tianjin Hospital of Integrated Traditional Chinese and Western Medicine (ITCWM) Nan Kai Hospital, Tianjin, P.R. China
| | - Hongjuan Sun
- Department of Traditional Chinese Medicine, Tianjin 4 Center Hospital, Tianjin, P.R. China
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Laser interstitial thermal therapy (LITT): Seizure outcomes for refractory mesial temporal lobe epilepsy. Epilepsy Behav 2018; 89:37-41. [PMID: 30384097 DOI: 10.1016/j.yebeh.2018.09.040] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/28/2018] [Accepted: 09/29/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND Laser interstitial thermal therapy (LITT) is a minimally invasive alternative with less cognitive risks compared with traditional surgery for focal drug-resistant epilepsy. OBJECTIVE We describe seizure outcomes and complications after LITT in our cohort with intractable mesial temporal lobe epilepsy (MTLE). MATERIAL AND METHODS We prospectively tracked Stanford's MTLE cases treated with LITT from October 2014 to October 2017. Primary endpoints were seizure outcomes by (1) Engel classification and (2) reduction in baseline seizure frequency. Secondary outcomes were postablation complications. RESULTS A total of 30 patients underwent selective amygdalohippocampotomy via LITT. Mesial temporal sclerosis (MTS) was present in 23/30 (77%) patients. Median follow-up was 18 ± 12 months (range: 6-44 months). Almost all 28/29 (97%) patients had >50% reduction, and 22/29 (76%) patients had >90% reduction in seizure frequency. Engel Class I outcome was achieved in 18/29 (62%) patients; with complete seizure freedom in 9/29 (31%) patients (Engel Class IA). Three (10%) patients have had only focal aware seizures (Engel Class 1B). Seizures only occurred with medication withdrawal in 6/29 (21%) patients (Engel Class ID). Class II was achieved by 6/29 (21%) and Class III by 5/29 (17%) patients. Complications included perioperative seizures in 10/29 (34%) and nonseizure complaints in 6/29 (21%) patients. Three (10%) patients had neurological deficits including one permanent superior quadrantanopsia, one transient trochlear, and one transient oculomotor nerve palsy. CONCLUSIONS Overall, Engel Class I outcome was achieved in 62% of patients with MTLE, and 97% of patients achieved >50% seizure frequency reduction. Complications were largely temporary, though there was one persistent visual field deficit. Laser ablation is well-tolerated and offers marked seizure reduction for the majority of patients.
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Busch RM, Hogue O, Kattan MW, Hamberger M, Drane DL, Hermann B, Kim M, Ferguson L, Bingaman W, Gonzalez-Martinez J, Najm IM, Jehi L. Nomograms to predict naming decline after temporal lobe surgery in adults with epilepsy. Neurology 2018; 91:e2144-e2152. [PMID: 30404781 DOI: 10.1212/wnl.0000000000006629] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 08/17/2018] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To develop and externally validate models to predict the probability of postoperative naming decline in adults following temporal lobe epilepsy surgery using easily accessible preoperative clinical predictors. METHODS In this retrospective, prediction model development study, multivariable models were developed in a cohort of 719 patients who underwent temporal lobe epilepsy surgery at Cleveland Clinic and externally validated in a cohort of 138 patients who underwent temporal lobe surgery at one of 3 epilepsy surgery centers in the United States (Columbia University Medical Center, Emory University School of Medicine, University of Washington School of Medicine). RESULTS The development cohort was 54% female with an average age at surgery of 36 years (SD 12). Twenty-six percent of this cohort experienced clinically relevant postoperative naming decline. The model included 5 variables: side of surgery, age at epilepsy onset, age at surgery, sex, and education. When applied to the external validation cohort, the model performed very well, with excellent calibration and a c statistic (reflecting discriminatory ability) of 0.81. A second model predicting moderate to severe postoperative naming decline included 3 variables: side of surgery, age at epilepsy onset, and preoperative naming score. This model generated a c statistic of 0.84 in the external validation cohort and showed good calibration. CONCLUSION Externally validated nomograms are provided in 2 easy-to-use formats (paper version and online calculator) clinicians can use to estimate the probability of naming decline in patients considering epilepsy surgery for treatment of pharmacoresistant temporal lobe epilepsy.
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Affiliation(s)
- Robyn M Busch
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle.
| | - Olivia Hogue
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Michael W Kattan
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Marla Hamberger
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Daniel L Drane
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Bruce Hermann
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Michelle Kim
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Lisa Ferguson
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - William Bingaman
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Jorge Gonzalez-Martinez
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Imad M Najm
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
| | - Lara Jehi
- From the Epilepsy Center (R.M.B., L.F., W.B., J.G.-M., I.M.N., L.J.), Department of Psychiatry & Psychology (R.M.B., L.F.), Department of Neurology (R.M.B., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Cleveland Clinic, OH; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; Department of Neurology (B.H.), University of Wisconsin School of Medicine and Public Health, Madison; and Department of Neurology (D.L.D., M.K.), University of Washington School of Medicine, Seattle
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Abstract
[Box: see text]
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Jain P, Tomlinson G, Snead C, Sander B, Widjaja E. Systematic review and network meta-analysis of resective surgery for mesial temporal lobe epilepsy. J Neurol Neurosurg Psychiatry 2018; 89:1138-1144. [PMID: 29769251 DOI: 10.1136/jnnp-2017-317783] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/05/2018] [Accepted: 04/22/2018] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To evaluate the effectiveness of anterior temporal lobectomy (ATL) versus selective amygdalohippocampectomy (SAH) on seizure-free outcome in patients with temporal lobe epilepsy, using both direct and indirect evidence from the literature. METHODS MEDLINE, Embase and Cochrane databases were searched for original research articles and systematic reviews comparing ATL versus SAH, and ATL or SAH versus medical management (MM). The outcome was seizure freedom at 12 months of follow-up or longer. Direct pairwise meta-analyses were conducted, followed by a random-effect Bayesian network meta-analysis (NMA) combining direct and indirect evidence. RESULTS Twenty-eight articles were included (18 compared ATL vs SAH, 1 compared ATL vs SAH vs MM, 8 compared ATL vs MM, and 1 compared SAH vs MM). Direct pairwise meta-analyses showed no significant differences in seizure-free outcome of ATL versus SAH (OR 1.14, 95% CI 0.93 to 1.39; p=0.201), but the odds of seizure-free outcome were higher for ATL versus MM (OR 29.16, 95% CI 10.44 to 81.50; p<0.00001), and SAH versus MM (OR 28.42, 95% CI 10.17 to 79.39; p<0.00001). NMA also showed that the odds of seizure-free outcome were no different in ATL versus SAH (OR 1.15, 95% credible interval (CrI) 0.84-1.15), but higher for ATL versus MM (OR 27.22, 95% CrI 15.38-27.22), and SAH versus MM (OR 23.57, 95% CrI 12.67-23.57). There were no significant differences between direct and indirect comparisons (all p>0.05). CONCLUSION Direct evidence, indirect evidence and NMA did not identify a difference in seizure-free outcome of ATL versus SAH.
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Affiliation(s)
- Puneet Jain
- Epilepsy Program, Division of Neurology, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - George Tomlinson
- Toronto Health Economics and Technology Assessment (THETA), University Health Network, Toronto, Ontario, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
| | - Carter Snead
- Epilepsy Program, Division of Neurology, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Beate Sander
- Toronto Health Economics and Technology Assessment (THETA), University Health Network, Toronto, Ontario, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
| | - Elysa Widjaja
- Epilepsy Program, Division of Neurology, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.,Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada
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134
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Marashly A, Loman MM, Lew SM. Stereotactic laser ablation for nonlesional cingulate epilepsy: case report. J Neurosurg Pediatr 2018; 22:481-488. [PMID: 30074447 DOI: 10.3171/2018.5.peds18120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/22/2018] [Indexed: 11/06/2022]
Abstract
Stereotactic laser ablation (SLA) is being increasingly used to treat refractory focal epilepsy, especially mesial temporal lobe epilepsy. However, emerging evidence suggests it can be used for extratemporal lobe epilepsy as well.The authors report the case of a 17-year-old male who presented with refractory nocturnal seizures characterized by bilateral arms stiffening or rhythmic jerking lasting several seconds. Semiology suggested an epileptogenic zone close to one of the supplementary sensory motor areas. Electroencephalography showed seizures arising from the central region without consistent lateralization. Brain imaging showed no abnormality. An invasive evaluation using bilateral stereoelectroencephalography (SEEG) was utilized in 2 steps, first to establish the laterality of seizures, and second to further cover the mesial cingulate region of the right hemisphere. Seizures arose from the middle portion of the right cingulate gyrus. Extraoperative electrical mapping revealed that the seizure onset zone was adjacent to eloquent motor areas. SLA targeting the right midcingulate gyrus was performed. The patient has remained seizure free since immediately after the procedure with no postoperative deficits (follow-up of 17 months).This case highlights the utility of SEEG in evaluating difficult-to-localize, focal epilepsy. It also demonstrates that the use of SLA can be extended to nonlesional, extratemporal epilepsies.
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135
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Benbadis SR, Geller E, Ryvlin P, Schachter S, Wheless J, Doyle W, Vale FL. Putting it all together: Options for intractable epilepsy: An updated algorithm on the use of epilepsy surgery and neurostimulation. Epilepsy Behav 2018; 88S:33-38. [PMID: 30241957 DOI: 10.1016/j.yebeh.2018.05.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 01/17/2023]
Abstract
For drug-resistant epilepsy, nonpharmacologic treatments should be considered early rather than late. Of the nondrug treatments, only resective surgery can be curative. Neurostimulation is palliative, i.e., not expected to achieve a seizure-free outcome. While resective surgery is the goal, other options are necessary because the majority of patients with drug-resistant epilepsy are not surgical candidates, and others have seizures that fail to improve with surgery or have only partial improvement but not seizure freedom. Neurostimulation modalities include vagus nerve stimulation (VNS), responsive neurostimulation (RNS), and deep brain stimulation (DBS), each with its own advantages, disadvantages, and side effects. In most scenarios, determined by noninvasive evaluation, especially EEG and MRI, several strategies are reasonable. For focal epilepsies, the choices are between resective surgery, with or without intracranial EEG, and all three modalities of neurostimulation. In situations where resective surgery is likely to result in seizure freedom, such as mesiotemporal lobe epilepsy or lesional focal epilepsy, resection (standard, laser, or radiofrequency) is preferred. For difficult cases like extratemporal nonlesional epilepsies, neurostimulation offers a less invasive option than resective surgery. For generalized and multifocal epilepsies, VNS is an option, RNS is not, and DBS has only limited evidence. "This article is part of the Supplement issue Neurostimulation for Epilepsy."
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Affiliation(s)
| | - Eric Geller
- Institute For Neurology and Neurosurgery at St. Barnabas, Livingston, NJ, United States
| | - Philippe Ryvlin
- Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | | | - James Wheless
- Le Bonheur Children's Hospital, Memphis, TN, United States
| | - Werner Doyle
- New York University, New York, NY, United States
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136
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Vogt VL, Delev D, Grote A, Schramm J, von Lehe M, Elger CE, Witt JA, Helmstaedter C. Neuropsychological outcome after subtemporal versus transsylvian approach for selective amygdalohippocampectomy in patients with mesial temporal lobe epilepsy: a randomised prospective clinical trial. J Neurol Neurosurg Psychiatry 2018; 89:1057-1063. [PMID: 29273691 DOI: 10.1136/jnnp-2017-316311] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 08/29/2017] [Accepted: 11/20/2017] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To compare the effects of different surgical approaches for selective amygdalohippocampectomy in patients with pharmacoresistant mesial temporal lobe epilepsy with regard to the neuropsychological outcome and to replicate an earlier study employing a matched-pair design. METHOD 47 patients were randomised to subtemporal versus transsylvian approaches. Memory, language, attentional and executive functions were assessed before and 1 year after surgery. Multivariate analyses of variance (MANOVAs) with presurgical and postsurgical assessments as within-subject variables and approach and side of surgery as between-subject factors were calculated. Additionally, the frequencies of individual performance changes based on reliable change indices were analysed. RESULTS Seizure freedom International League Against Epilepsy (ILAE) 1a, was achieved in 62% of all patients without group difference. MANOVAs revealed no significant effects of approach on cognition. Tested separately for each parameter, verbal recognition memory declined irrespective of approach. Post hoc tests revealed that on group level, the subtemporal approach was associated with a worse outcome for verbal learning and delayed free recall as well as for semantic fluency. Accordingly, on individual level, more patients in the subtemporal group declined in verbal learning. Left side of surgery was associated with decline in naming regardless of approach. CONCLUSION The main analysis did not confirm the effects of approach on memory outcome seen in our previous study. Post hoc testing, however, showed greater memory losses with the subtemporal approach. Previous findings were replicated for semantic fluency. The discrepant results are discussed on the background of the different study designs.
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Affiliation(s)
- Viola Lara Vogt
- Department of Epileptology, University of Bonn-Medical Center, Bonn, Germany
| | - Daniel Delev
- Department of Neurosurgery, University of Bonn-Medical Center, Bonn, Germany.,Department of Neurosurgery, University Medical Center, Freiburg, Germany
| | - Alexander Grote
- Department of Neurosurgery, University of Bonn-Medical Center, Bonn, Germany
| | - Johannes Schramm
- Department of Neurosurgery, University of Bonn-Medical Center, Bonn, Germany
| | - Marec von Lehe
- Department of Neurosurgery, Knappschaftskrankenhaus Bochum, Bonn, Germany
| | | | - Juri-Alexander Witt
- Department of Epileptology, University of Bonn-Medical Center, Bonn, Germany
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137
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How Intraoperative Tools and Techniques Have Changed the Approach to Brain Tumor Surgery. Curr Oncol Rep 2018; 20:89. [DOI: 10.1007/s11912-018-0723-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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138
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Kuo CH, Feroze AH, Poliachik SL, Hauptman JS, Novotny EJ, Ojemann JG. Laser Ablation Therapy for Pediatric Patients with Intracranial Lesions in Eloquent Areas. World Neurosurg 2018; 121:e191-e199. [PMID: 30261370 DOI: 10.1016/j.wneu.2018.09.074] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 09/09/2018] [Accepted: 09/11/2018] [Indexed: 01/07/2023]
Abstract
BACKGROUND Laser interstitial thermal therapy (LITT) is an alternative, less-invasive, and, in some circumstances, effective treatment for patients with intracranial pathology including epilepsy and some tumors. For intracranial lesions in eloquent areas, resection by conventional craniotomy proves often to be a challenge, including in the care of pediatric patients. Herein, we reviewed our experience with magnetic resonance imaging (MRI)-guided LITT as treatment for pediatric patients with intracranial lesions in eloquent areas and evaluate neurologic function and clinical outcomes. METHODS We retrospectively reviewed consecutive patients with intracranial lesions in eloquent speech and motor areas who underwent MRI-guided LITT. Clinical evaluation, including neurologic function and neuropsychological testing, was conducted according to clinical considerations. MRI pre- and postoperative imaging was reviewed to compare the change of lesion size. RESULTS Five pediatric patients received MRI-guided LITT of intracranial lesions in eloquent cortex. One patient experienced complications secondary to MRI-guided LITT, but neither was discharged with a neurologic deficit. CONCLUSIONS For intracranial lesions in the eloquent cortex, conventional craniotomy with surgical resection is a challenge for neurosurgeons, especially pediatric patients. MRI-guided LITT provides a less-invasive and potentially effective option for treatment in the management of pediatric epilepsy and tumors.
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Affiliation(s)
- Chao-Hung Kuo
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA; Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan; School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Abdullah H Feroze
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA
| | - Sandra L Poliachik
- Department of Radiology, Seattle Children's Hospital, Seattle, Washington, USA; Department of Neurology, Seattle Children's Hospital, Seattle, Washington, USA
| | - Jason S Hauptman
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA; Division of Neurosurgery, Seattle Children's Hospital, Seattle, Washington, USA
| | - Edward J Novotny
- Department of Neurology, University of Washington, Seattle, Washington, USA; Department of Neurology, Seattle Children's Hospital, Seattle, Washington, USA
| | - Jeffrey G Ojemann
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA; Division of Neurosurgery, Seattle Children's Hospital, Seattle, Washington, USA
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139
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Guo Z, Leong MCW, Su H, Kwok KW, Chan DTM, Poon WS. Techniques for Stereotactic Neurosurgery: Beyond the Frame, Toward the Intraoperative Magnetic Resonance Imaging–Guided and Robot-Assisted Approaches. World Neurosurg 2018; 116:77-87. [DOI: 10.1016/j.wneu.2018.04.155] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 11/16/2022]
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140
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Jayakar P, Jayakar A, Libenson M, Arzimanoglou A, Rydenhag B, Cross JH, Bhatia S, Tassi L, Lachhwani D, Gaillard WD. Epilepsy surgery near or in eloquent cortex in children-Practice patterns and recommendations for minimizing and reporting deficits. Epilepsia 2018; 59:1484-1491. [PMID: 30033517 DOI: 10.1111/epi.14510] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 06/13/2018] [Indexed: 01/16/2023]
Abstract
OBJECTIVE We aimed to investigate the current practices guiding surgical resection strategies involving epileptogenic zones (EZs) near or in eloquent cortex (EC) at pediatric epilepsy surgery centers worldwide. METHODS A survey was conducted among 40 respondents from 33 pediatric epilepsy surgery centers worldwide on the weight assigned to diagnostic tests used to define the EZ and EC, how EC is viewed, and how surgeries are planned for foci near or in eloquent cortex. RESULTS A descriptive analysis was performed that revealed considerable variation in the use of diagnostic tests and resective strategies toward EZ and EC. SIGNIFICANCE The wide variation in strategies may contribute to undesirable outcomes characterized by poor seizure control with added deficits and underscores the need to establish best practices in pediatric epilepsy surgery. The survey data were used to formulate a set of recommendations to help minimize deficits and to report them consistently.
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Affiliation(s)
- Prasanna Jayakar
- Department of Neurology and Comprehensive Epilepsy Program, Brain Institute, Nicklaus Children's Hospital, Miami, Florida
| | - Anuj Jayakar
- Department of Neurology and Epilepsy, Nicklaus Children's Hospital, Miami, Florida
| | - Mark Libenson
- Department of Neurology, Children's Hospital Boston, Boston, Massachusetts
| | - Alexis Arzimanoglou
- Clinical Epileptology, Sleep Disorders and Functional Neurology in Children, University Hospitals of Lyon, Lyon, France
| | - Bertil Rydenhag
- Epilepsy Research Group, Institute of Neuroscience and Physiology, Goteborg, Sweden
| | - J Helen Cross
- Department of Clinical & Experimental Epilepsy, Great Ormond Street Hospital, University College London, London, UK
| | - Sanjiv Bhatia
- Department of Neurosurgery, Miami Children's Hospital, Miami, Florida
| | - Laura Tassi
- Department of Neuroscience, Claudio Munari Epilepsy Surgery Centre, Milano, Italy
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141
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Jermakowicz WJ, Cajigas I, Dan L, Guerra S, Sur S, D’Haese PF, Kanner AM, Jagid JR. Ablation dynamics during laser interstitial thermal therapy for mesiotemporal epilepsy. PLoS One 2018; 13:e0199190. [PMID: 29979717 PMCID: PMC6034782 DOI: 10.1371/journal.pone.0199190] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/02/2018] [Indexed: 11/18/2022] Open
Abstract
Introduction The recent emergence of laser interstitial thermal therapy (LITT) as a frontline surgical tool in the management of brain tumors and epilepsy is a result of advances in MRI thermal imaging. A limitation to further improving LITT is the diversity of brain tissue thermoablative properties, which hinders our ability to predict LITT treatment-related effects. Utilizing the mesiotemporal lobe as a consistent anatomic model system, the goal of this study was to use intraoperative thermal damage estimate (TDE) maps to study short- and long-term effects of LITT and to identify preoperative variables that could be helpful in predicting tissue responses to thermal energy. Methods For 30 patients with mesiotemporal epilepsy treated with LITT at a single institution, intraoperative TDE maps and pre-, intra- and post-operative MRIs were co-registered in a common reference space using a deformable atlas. The spatial overlap of TDE maps with manually-traced immediate (post-ablation) and delayed (6-month) ablation zones was measured using the dice similarity coefficient (DSC). Then, motivated by simple heat-transfer models, ablation dynamics were quantified at amygdala and hippocampal head from TDE pixel time series fit by first order linear dynamics, permitting analysis of the thermal time constant (τ). The relationships of these measures to 16 independent variables derived from patient demographics, mesiotemporal anatomy, preoperative imaging characteristics and the surgical procedure were examined. Results TDE maps closely overlapped immediate ablation borders but were significantly larger than the ablation cavities seen on delayed imaging, particularly at the amygdala and hippocampal head. The TDEs more accurately predicted delayed LITT effects in patients with smaller perihippocampal CSF spaces. Analyses of ablation dynamics from intraoperative TDE videos showed variable patterns of lesion progression after laser activation. Ablations tended to be slower for targets with increased preoperative T2 MRI signal and in close proximity to large, surrounding CSF spaces. In addition, greater laser energy was required to ablate mesial versus lateral mesiotemporal structures, an effect associated with laser trajectory and target contrast-enhanced T1 MRI signal. Conclusions Patient-specific variations in mesiotemporal anatomy and pathology may influence the thermal coagulation of these tissues. We speculate that by incorporating demographic and imaging data into predictive models we may eventually enhance the accuracy and precision with which LITT is delivered, improving outcomes and accelerating adoption of this novel tool.
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Affiliation(s)
- Walter J. Jermakowicz
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Iahn Cajigas
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Lia Dan
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Santiago Guerra
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Samir Sur
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Pierre-Francois D’Haese
- Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Andres M. Kanner
- Epilepsy Division, Department of Neurology, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Jonathan R. Jagid
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- * E-mail:
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142
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Donos C, Breier J, Friedman E, Rollo P, Johnson J, Moss L, Thompson S, Thomas M, Hope O, Slater J, Tandon N. Laser ablation for mesial temporal lobe epilepsy: Surgical and cognitive outcomes with and without mesial temporal sclerosis. Epilepsia 2018; 59:1421-1432. [DOI: 10.1111/epi.14443] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Cristian Donos
- Vivian L. Smith Department of Neurosurgery; McGovern Medical School; Houston TX USA
| | - Joshua Breier
- Children's Learning Institute; University of Texas Health Science Center at Houston; Houston TX USA
| | - Elliott Friedman
- Department of Radiology; McGovern Medical School; Houston TX USA
| | - Patrick Rollo
- Vivian L. Smith Department of Neurosurgery; McGovern Medical School; Houston TX USA
| | - Jessica Johnson
- Vivian L. Smith Department of Neurosurgery; McGovern Medical School; Houston TX USA
| | - Lauren Moss
- Children's Learning Institute; University of Texas Health Science Center at Houston; Houston TX USA
| | - Stephen Thompson
- Department of Neurology; McGovern Medical School; Houston TX USA
| | - Melissa Thomas
- Department of Neurology; McGovern Medical School; Houston TX USA
| | - Omotola Hope
- Department of Neurology; McGovern Medical School; Houston TX USA
| | - Jeremy Slater
- Department of Neurology; McGovern Medical School; Houston TX USA
| | - Nitin Tandon
- Vivian L. Smith Department of Neurosurgery; McGovern Medical School; Houston TX USA
- Mischer Neuroscience Institute; Memorial Hermann Hospital Texas Medical Center; Houston TX USA
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143
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Abstract
PURPOSE OF REVIEW This review provides an update and summary of recent neuropsychological findings in epilepsy focusing on three major clinical topics among the many developments in the field. We will critically outline the current state with regard to cognition in new-onset epilepsies, social cognition in epilepsy, and the long-term outcome of epilepsy surgery and the cognitive outcomes of superselective surgical procedures. RECENT FINDINGS Current studies indicate that neuropsychological impairments are prevalent already at the onset of epilepsy and even before, social cognition (i.e., emotion recognition and theory of mind) is impaired in different epilepsy populations, the long-term outcome of epilepsy surgery is mostly characterized by a stable or even improved cognitive status, and superselective epilepsy surgeries are associated with a promising neuropsychological outcome. SUMMARY The high prevalence of cognitive deficits around epilepsy onset challenges the assumption that epilepsy is the major cause of cognitive problems and calls for early neuropsychological diagnostics. Social cognition seems to be a relevant domain that is not yet routinely considered in epilepsy. The cognitive long-term outcome of epilepsy surgery is mostly positive. Stereotactic thermocoagulation and gamma knife surgery appear to be cognitively safe procedures.
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144
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Tao JX, Wu S, Lacy M, Rose S, Issa NP, Yang CW, Dorociak KE, Bruzzone M, Kim J, Daif A, Choi J, Towle VL, Warnke PC. Stereotactic EEG-guided laser interstitial thermal therapy for mesial temporal lobe epilepsy. J Neurol Neurosurg Psychiatry 2018; 89:542-548. [PMID: 29183959 DOI: 10.1136/jnnp-2017-316833] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 10/28/2017] [Accepted: 11/08/2017] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To determine the outcomes of combined stereo-electroencephalography-guided and MRI-guided stereotactic laser interstitial thermal therapy (LITT) in the treatment of patients with drug-resistant mesial temporal lobe epilepsy (mTLE). METHODS We prospectively assessed the surgical and neuropsychological outcomes in 21 patients with medically refractory mTLE who underwent LITT at the University of Chicago Medical Center. We further compared the surgical outcomes in patients with and without mesial temporal sclerosis (MTS). RESULTS Of the 21 patients, 19 (90%) underwent Invasive EEG study and 11 (52%) achieved freedom from disabling seizures with a mean duration of postoperative follow-up of 24±11 months after LITT. Eight (73%) of 11 patients with MTS achieved freedom from disabling seizures, whereas 3 (30 %) of 10 patients without MTS achieved freedom from disabling seizures. Patients with MTS were significantly more likely to become seizure-free, as compared with those without MTS (P=0.002). There was no significant difference in total ablation volume and the percentage of the ablated amygdalohippocampal complex between seizure-free and non-seizure-free patients. Presurgical and postsurgical neuropsychological assessments were obtained in 10 of 21 patients. While there was no group decline in any neuropsychological assessment, a significant postoperative decline in verbal memory and confrontational naming was observed in individual patients. CONCLUSIONS MRI-guided LITT is a safe and effective alternative to selective amygdalohippocampectomy and anterior temporal lobectomy for mTLE with MTS. Nevertheless, its efficacy in those without MTS seems modest. Large multicentre and prospective studies are warranted to further determine the efficacy and safety of LITT.
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Affiliation(s)
- James X Tao
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Shasha Wu
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Maureen Lacy
- Department of Psychiatry, The University of Chicago, Chicago, Illinois, USA
| | - Sandra Rose
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Naoum P Issa
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Carina W Yang
- Department of Radiology, The University of Chicago, Chicago, Illinois, USA
| | | | - Maria Bruzzone
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Jisoon Kim
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Ahmad Daif
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Jason Choi
- Department of Neurosurgery, The University of Chicago, Chicago, Illinois, USA
| | - Vernon L Towle
- Department of Neurology, The University of Chicago, Chicago, Illinois, USA
| | - Peter C Warnke
- Department of Neurosurgery, The University of Chicago, Chicago, Illinois, USA
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Ormond DR, Clusmann H, Sassen R, Hoppe C, Helmstaedter C, Schramm J, Grote A. Pediatric Temporal Lobe Epilepsy Surgery in Bonn and Review of the Literature. Neurosurgery 2018; 84:844-856. [DOI: 10.1093/neuros/nyy125] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 03/15/2018] [Indexed: 11/14/2022] Open
Affiliation(s)
- D Ryan Ormond
- Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado
| | - Hans Clusmann
- Department of Neurosurgery, University of Aachen, Aachen, Germany
| | - Robert Sassen
- Department of Epileptology, Bonn University Medical Center, Bonn, Germany
| | - Christian Hoppe
- Department of Neuropsychology, Bonn University Medical Center, Bonn, Germany
| | | | | | - Alexander Grote
- Department of Neurosurgery, Bielefeld Medical Center, Bielefeld, Germany
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146
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Vakharia VN, Duncan JS, Witt JA, Elger CE, Staba R, Engel J. Getting the best outcomes from epilepsy surgery. Ann Neurol 2018. [PMID: 29534299 PMCID: PMC5947666 DOI: 10.1002/ana.25205] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Neurosurgery is an underutilized treatment that can potentially cure drug‐refractory epilepsy. Careful, multidisciplinary presurgical evaluation is vital for selecting patients and to ensure optimal outcomes. Advances in neuroimaging have improved diagnosis and guided surgical intervention. Invasive electroencephalography allows the evaluation of complex patients who would otherwise not be candidates for neurosurgery. We review the current state of the assessment and selection of patients and consider established and novel surgical procedures and associated outcome data. We aim to dispel myths that may inhibit physicians from referring and patients from considering neurosurgical intervention for drug‐refractory focal epilepsies. Ann Neurol 2018;83:676–690
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Affiliation(s)
- Vejay N Vakharia
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, United Kingdom, and Chalfont Centre for Epilepsy
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, United Kingdom, and Chalfont Centre for Epilepsy
| | - Juri-Alexander Witt
- Department of Epileptology, University of Bonn Medical Center, Bonn, Germany
| | - Christian E Elger
- Department of Epileptology, University of Bonn Medical Center, Bonn, Germany
| | - Richard Staba
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA
| | - Jerome Engel
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA
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147
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North RY, Raskin JS, Curry DJ. MRI-Guided Laser Interstitial Thermal Therapy for Epilepsy. Neurosurg Clin N Am 2018; 28:545-557. [PMID: 28917283 DOI: 10.1016/j.nec.2017.06.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
MRI-guided laser interstitial thermal therapy for epilepsy (LITT-E) has become an established, minimally invasive alternative to traditional epilepsy surgery. LITT-E is particularly valuable in cases in which open surgery poses unacceptably high morbidity or patient preference precludes craniotomy. Here we present a focused review of technical details and application of LITT to both focal and generalized epilepsy.
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Affiliation(s)
- Robert Y North
- Department of Neurosurgery, Baylor College of Medicine, 7200 Cambridge, Suite 9A, Houston, TX 77030, USA
| | - Jeffrey S Raskin
- Division of Pediatric Neurosurgery, Department of Neurosurgery, Texas Children's Hospital, Baylor College of Medicine, 6701 Fannin Street, Suite 1230, Houston, TX 77030, USA
| | - Daniel J Curry
- Division of Pediatric Neurosurgery, Department of Neurosurgery, Texas Children's Hospital, Baylor College of Medicine, 6701 Fannin Street, Suite 1230, Houston, TX 77030, USA.
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148
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Brown MG, Drees C, Nagae LM, Thompson JA, Ojemann S, Abosch A. Curative and palliative MRI-guided laser ablation for drug-resistant epilepsy. J Neurol Neurosurg Psychiatry 2018; 89:425-433. [PMID: 29084870 DOI: 10.1136/jnnp-2017-316003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 09/15/2017] [Accepted: 09/18/2017] [Indexed: 12/30/2022]
Abstract
Epilepsy is a common neurological disorder occurring in 3% of the US adult population. It is characterised by seizures resulting from aberrant hypersynchronous neural activity. Approximately one-third of newly diagnosed epilepsy cases fail to become seizure-free in response to antiseizure drugs. Optimal seizure control, in cases of drug-resistant epilepsy, often requires neurosurgical intervention targeting seizure foci, such as the temporal lobe. Advances in minimally invasive ablative surgical approaches have led to the development of MRI-guided laser interstitial thermal therapy (LITT). For refractory epilepsy, this surgical intervention offers many advantages over traditional approaches, including real-time lesion monitoring, reduced morbidity, and in some reports increased preservation of cognitive and language processes. We review the use of LITT for epileptic indications in the context of its application as a curative (seizure freedom) or palliative (seizure reduction) measure for both lesional and non-lesional forms of epilepsy. Furthermore, we address the use of LITT for a variety of extratemporal lobe epilepsies. Finally, we describe clinical outcomes, limitations and future applications of LITT for epilepsy.
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Affiliation(s)
- Mesha-Gay Brown
- Department of Neurology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Cornelia Drees
- Department of Neurology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Lidia M Nagae
- Department of Neurology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - John A Thompson
- Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Steven Ojemann
- Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Aviva Abosch
- Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado, USA
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149
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Vakharia VN, Sparks R, Li K, O'Keeffe AG, Miserocchi A, McEvoy AW, Sperling MR, Sharan A, Ourselin S, Duncan JS, Wu C. Automated trajectory planning for laser interstitial thermal therapy in mesial temporal lobe epilepsy. Epilepsia 2018; 59:814-824. [PMID: 29528488 PMCID: PMC5901027 DOI: 10.1111/epi.14034] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/05/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Surgical resection of the mesial temporal structures brings seizure remission in 65% of individuals with drug-resistant mesial temporal lobe epilepsy (MTLE). Laser interstitial thermal therapy (LiTT) is a novel therapy that may provide a minimally invasive means of ablating the mesial temporal structures with similar outcomes, while minimizing damage to the neocortex. Systematic trajectory planning helps ensure safety and optimal seizure freedom through adequate ablation of the amygdalohippocampal complex (AHC). Previous studies have highlighted the relationship between the residual unablated mesial hippocampal head and failure to achieve seizure freedom. We aim to implement computer-assisted planning (CAP) to improve the ablation volume and safety of LiTT trajectories. METHODS Twenty-five patients who had previously undergone LiTT for MTLE were studied retrospectively. The EpiNav platform was used to automatically generate an optimal ablation trajectory, which was compared with the previous manually planned and implemented trajectory. Expected ablation volumes and safety profiles of each trajectory were modeled. The implemented laser trajectory and achieved ablation of mesial temporal lobe structures were quantified and correlated with seizure outcome. RESULTS CAP automatically generated feasible trajectories with reduced overall risk metrics (P < .001) and intracerebral length (P = .007). There was a significant correlation between the actual and retrospective CAP-anticipated ablation volumes, supporting a 15 mm diameter ablation zone model (P < .001). CAP trajectories would have provided significantly greater ablation of the amygdala (P = .0004) and AHC (P = .008), resulting in less residual unablated mesial hippocampal head (P = .001), and reduced ablation of the parahippocampal gyrus (P = .02). SIGNIFICANCE Compared to manually planned trajectories CAP provides a better safety profile, with potentially improved seizure-free outcome and reduced neuropsychological deficits, following LiTT for MTLE.
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Affiliation(s)
- Vejay N. Vakharia
- Department of Clinical and Experimental EpilepsyUCL Institute of NeurologyNational Hospital for Neurology and NeurosurgeryLondonUK
- Epilepsy Society MRI UnitChalfont St PeterUK
| | - Rachel Sparks
- Wellcome/EPSRC Centre for Interventional and Surgical SciencesUniversity College LondonLondonUK
| | - Kuo Li
- Department of Clinical and Experimental EpilepsyUCL Institute of NeurologyNational Hospital for Neurology and NeurosurgeryLondonUK
- The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | | | - Anna Miserocchi
- Department of Clinical and Experimental EpilepsyUCL Institute of NeurologyNational Hospital for Neurology and NeurosurgeryLondonUK
| | - Andrew W. McEvoy
- Department of Clinical and Experimental EpilepsyUCL Institute of NeurologyNational Hospital for Neurology and NeurosurgeryLondonUK
| | - Michael R. Sperling
- Department of Neurology, Vickie and Jack Farber Institute for NeuroscienceJefferson Comprehensive Epilepsy CenterThomas Jefferson UniversityPhiladelphiaPAUSA
| | - Ashwini Sharan
- Division of Epilepsy and Neuromodulation NeurosurgeryVickie and Jack Farber Institute for NeuroscienceThomas Jefferson UniversityPhiladelphiaPAUSA
| | - Sebastien Ourselin
- Department of Clinical and Experimental EpilepsyUCL Institute of NeurologyNational Hospital for Neurology and NeurosurgeryLondonUK
- Wellcome/EPSRC Centre for Interventional and Surgical SciencesUniversity College LondonLondonUK
| | - John S. Duncan
- Department of Clinical and Experimental EpilepsyUCL Institute of NeurologyNational Hospital for Neurology and NeurosurgeryLondonUK
- Epilepsy Society MRI UnitChalfont St PeterUK
| | - Chengyuan Wu
- Division of Epilepsy and Neuromodulation NeurosurgeryVickie and Jack Farber Institute for NeuroscienceThomas Jefferson UniversityPhiladelphiaPAUSA
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150
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Carminucci A, Patel NV, Sundararajan S, Keller I, Danish S. Volumetric Trends Associated with MR-guided Stereotactic Laser Amygdalohippocampectomy in Mesial Temporal Lobe Epilepsy. Cureus 2018; 10:e2376. [PMID: 29805945 PMCID: PMC5969817 DOI: 10.7759/cureus.2376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective: Magnetic resonance (MR)-guided stereotactic laser amygdalohippocampectomy is a minimally invasive procedure for the treatment of refractory epilepsy in patients with mesial temporal sclerosis. Limited data exist on post-ablation volumetric trends associated with the procedure. Methods: 10 patients with mesial temporal sclerosis underwent MR-guided stereotactic laser amygdalohippocampectomy. Three independent raters computed ablation volumes at the following time points: pre-ablation (PreA), immediate post-ablation (IPA), 24 hours post-ablation (24PA), first follow-up post-ablation (FPA), and greater than three months follow-up post-ablation (>3MPA), using OsiriX DICOM Viewer (Pixmeo, Bernex, Switzerland). Statistical trends in post-ablation volumes were determined for the time points. Results: MR-guided stereotactic laser amygdalohippocampectomy produces a rapid rise and distinct peak in post-ablation volume immediately following the procedure. IPA volumes are significantly higher than all other time points. Comparing individual time points within each raters dataset (intra-rater), a significant difference was seen between the IPA time point and all others. There was no statistical difference between the 24PA, FPA, and >3MPA time points. A correlation analysis demonstrated the strongest correlations at the 24PA (r=0.97), FPA (r=0.95), and 3MPA time points (r=0.99), with a weaker correlation at IPA (r=0.92). Conclusion: MR-guided stereotactic laser amygdalohippocampectomy produces a maximal increase in post-ablation volume immediately following the procedure, which decreases and stabilizes at 24 hours post-procedure and beyond three months follow-up. Based on the correlation analysis, the lower inter-rater reliability at the IPA time point suggests it may be less accurate to assess volume at this time point. We recommend post-ablation volume assessments be made at least 24 hours post-selective ablation of the amygdalohippocampal complex (SLAH).
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Affiliation(s)
- Arthur Carminucci
- Neurosurgery, Rutgers Robert Wood Johnson Medical School, Piscataway, USA
| | - Nitesh V Patel
- Neurosurgery, Rutgers Robert Wood Johnson Medical School, Piscataway, USA
| | - Sri Sundararajan
- Radiology, Rutgers Robert Wood Johnson Medical School, Piscataway, USA
| | - Irwin Keller
- Radiology, Rutgers Robert Wood Johnson Medical School, Piscataway, USA
| | - Shabbar Danish
- Neurosurgery, Rutgers Robert Wood Johnson Medical School, Piscataway, USA
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