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Melikyan AG, Kozlova AB, Vlasov PA, Dorofeeva MY, Shishkina LV, Agrba SB. [Epilepsy surgery in children with tuberous sclerosis]. ZHURNAL VOPROSY NEIROKHIRURGII IMENI N. N. BURDENKO 2023; 87:5-16. [PMID: 37011323 DOI: 10.17116/neiro2023870215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Most children with tuberous sclerosis (TS) present with intractable seizures. Various factors including demography, clinical data and surgery option are mentioned to affect the outcome after epilepsy surgery in these cases. OBJECTIVE To evaluate some demographic and clinical variables probably related to seizure outcome. MATERIAL AND METHODS Thirty-three children, median age 4.2 ys (7.5 mths-16 ys), with TS and DR-epilepsy underwent surgery. Within overall 38 procedures (redo surgery was needed in 5 cases), tuberectomy (with or without perituberal cortectomy) was performed in 21 cases, lobectomy - 8, callosotomy - 3, various disconnections (anterior frontal, TPO and hemispherotomy) - 6 patients. Standard preoperative evaluation included MRI and video-EEG. Invasive recordings were used in 8 cases, coupled by MEG and SISCOM SPECT in some cases. ECOG and neuronavigation were used routinely during tuberectomies, and stimulation and mapping were employed in cases with lesions overlapping or near to eloquent cortex. Surgical complications: wound CSF leak (n=1) and hydrocephalus (n=2) were noted in 7.5% of cases. Postoperative neurological deficit (most frequently hemiparesis) developed in 12 patients, being temporary in majority of them. At the last FU (med 5.4 ys) favorable outcome (Engel I) has been achieved in 18 cases (54%), while 7 patients (15%) with persisting seizures reported less common attacks and their milder form (Engel Ib-III). Six patients were able to discontinue AED-treatment and 15 children resumed development and markedly improved in cognition and behavior. RESULTS AND CONCLUSION Among different variables potentially influencing the outcome after epilepsy surgery in cases with TS, the most important one is seizure type. If prevalent, focal type may be a biomarker of favorable outcomes and probability to become free of seizures.
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Affiliation(s)
| | - A B Kozlova
- Burdenko Neurosurgical Center, Moscow, Russia
| | - P A Vlasov
- Burdenko Neurosurgical Center, Moscow, Russia
| | - M Yu Dorofeeva
- Veltishchev Research and Clinical Institute for Pediatrics and Pediatric Surgery, Moscow, Russia
| | | | - S B Agrba
- Burdenko Neurosurgical Center, Moscow, Russia
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Hagiwara K, Tanaka H, Miyoshi A, Kamada T, Shigeto H, Ohara S, Akamatsu N. Postoperative striatal degeneration: a hitherto unrecognized impact of frontal disconnection surgery for drug-resistant epilepsy. Illustrative cases. JOURNAL OF NEUROSURGERY: CASE LESSONS 2022; 3:CASE21644. [PMID: 36130543 PMCID: PMC9379656 DOI: 10.3171/case21644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/13/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Frontal disconnection surgery is a useful surgical option for patients with frontal epilepsy whose seizure onset zones are exceedingly large and thus are not amenable to conventional resective surgery. While it has the advantage of avoiding sequelae stemming from a large resection cavity, the impact of radical anatomofunctional disconnection of such a vast frontal region is not fully understood. OBSERVATIONS The authors have identified secondary degeneration in the striatum ipsilateral to the frontal disconnection surgery in two adult patients who had otherwise favorable postoperative outcomes following the surgery. On serial postoperative magnetic resonance imaging, the striatum showed transient restricted diffusion in the caudate head and rostral putamen around several weeks postoperatively and subsequent atrophy in the caudate head. The affected striatal regions (i.e., the anterior portion of the striatum) were congruent with the known fronto-striatal connectivity corresponding to the disconnected frontal regions anterior to the primary and supplementary motor areas. Both patients achieved 1-year seizure freedom without apparent disability related to the surgery. LESSONS The benign postoperative course despite the marked degenerative changes in the ipsilateral striatum supports the feasibility of the frontal disconnection surgery in otherwise inoperable patients with broad frontal epileptogenicity.
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Affiliation(s)
| | - Hideaki Tanaka
- Department of Neurosurgery, Fukuoka Sanno Hospital, Fukuoka, Japan; and
| | | | | | - Hiroshi Shigeto
- Epilepsy and Sleep Center
- Division of Medical Technology, Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shinji Ohara
- Epilepsy and Sleep Center
- Department of Neurosurgery, Fukuoka Sanno Hospital, Fukuoka, Japan; and
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Castagno S, D'Arco F, Tahir MZ, Battey H, Eltze C, Moeller F, Tisdall M. Seizure outcomes of large volume temporo-parieto-occipital and frontal surgery in children with drug-resistant epilepsy. Epilepsy Res 2021; 177:106769. [PMID: 34560348 DOI: 10.1016/j.eplepsyres.2021.106769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 09/11/2021] [Accepted: 09/19/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE In this study, we investigate the seizure outcomes of temporo-parieto-occipital (TPO) and frontal disconnections or resections in children with drug-resistant epilepsy (DRE) in order to determine factors which may predict surgical results. METHODS Children with DRE, who underwent either TPO or frontal disconnection or resection at Great Ormond Street Hospital for Children between 2000 and 2017, were identified from a prospectively collated operative database. Demographic data, age at surgery, type of surgery, scalp EEGs and operative histopathology were collected. Magnetic resonance imaging (MRI) was assessed to determine completeness of disconnection and presence of radiological lesion beyond the disconnection margins. Seizure outcome at 6, 12, and 24 months post-surgery was assessed using the Engel Scale (ES). Logistic regression was used to identify relationships between data variables and seizure outcome. RESULTS 46 children (males = 28, females = 18; age range 0.5-16.6 years) who underwent TPO (n = 32, including a re-do disconnection) or frontal disconnection or resection (n = 15) were identified. Patients in the TPO treatment group had more favourable seizure outcomes than those in the frontal treatment group (ES I-II in 56 %vs 47 % at 6 months, 52 % vs 46 % at 12 months). Presence of the lesion beyond disconnection boundaries and older age at the time of surgery were associated with poorer seizure outcome. Gender, surgery type, completeness of disconnection, scalp EEG findings and underlying pathology were not related to seizure outcome, but subgroup numbers were small. CONCLUSIONS Both TPO and frontal disconnection are effective treatments for selected children with posterior multi-lobar or diffuse frontal lobe epilepsy. Confinement of the MRI lesion within the disconnection margins and a younger age at surgery are associated with favourable seizure outcomes. Further studies are required to elucidate these findings.
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Affiliation(s)
| | - Felice D'Arco
- Great Ormond Street Hospital, Department of Radiology, London, WC1N 3JH, United Kingdom
| | - M Zubair Tahir
- Great Ormond Street Hospital, Department of Neurosurgery, London, WC1N 3JH, United Kingdom
| | - Heather Battey
- Imperial College London, Department of Mathematics, London, SW7 2AZ, United Kingdom
| | - Christin Eltze
- Great Ormond Street Hospital, Department of Neurology, London, WC1N 3JH, United Kingdom
| | - Friederike Moeller
- Great Ormond Street Hospital, Department of Neurology, London, WC1N 3JH, United Kingdom
| | - Martin Tisdall
- Great Ormond Street Hospital, Department of Neurosurgery, London, WC1N 3JH, United Kingdom
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Cossu G, González-López P, Pralong E, Kalser J, Messerer M, Daniel RT. Unilateral prefrontal lobotomy for epilepsy: technique and surgical anatomy. Neurosurg Focus 2021; 48:E10. [PMID: 32234977 DOI: 10.3171/2020.1.focus19938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 01/24/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Surgery for frontal lobe epilepsy remains a challenge because of the variable seizure outcomes after surgery. Disconnective procedures are increasingly applied to isolate the epileptogenic focus and avoid complications related to extensive brain resection. Previously, the authors described the anterior quadrant disconnection procedure to treat large frontal lobe lesions extending up to but not involving the primary motor cortex. In this article, they describe a surgical technique for unilateral disconnection of the prefrontal cortex, while providing an accurate description of the surgical and functional anatomy of this disconnective procedure. METHODS The authors report the surgical treatment of a 5-month-old boy who presented with refractory epilepsy due to extensive cortical dysplasia of the left prefrontal lobe. In addition, with the aim of both describing the subcortical intrinsic anatomy and illustrating the different connections between the prefrontal lobe and the rest of the brain, the authors dissected six human cadaveric brain hemispheres. These dissections were performed from lateral to medial and from medial to lateral to reveal the various tracts sectioned during the three different steps in the surgery, namely the intrafrontal disconnection, anterior callosotomy, and frontobasal disconnection. RESULTS The first step of the dissection involves cutting the U-fibers. During the anterior intrafrontal disconnection, the superior longitudinal fasciculus in the depth of the middle frontal gyrus, the uncinate fasciculus, and the inferior frontooccipital fasciculus in the depth of the inferior frontal gyrus at the level of the anterior insular point are visualized and sectioned, followed by sectioning of the anterior limb of the internal capsule. Once the frontal horn is reached, the anterior callosotomy can be performed to disconnect the genu and the rostrum of the corpus callosum. The intrafrontal disconnection is deepened toward the falx, and at the medial surface, the cingulum is sectioned. The frontobasal disconnection involves cutting the anterior limb of the anterior commissure. CONCLUSIONS This technique allows selective isolation of the epileptogenic focus located in the prefrontal lobe to avoid secondary propagation. Understanding the surface and white matter fiber anatomy is essential to safely perform the procedure and obtain a favorable seizure outcome.
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Affiliation(s)
- Giulia Cossu
- 1Department of Neurosurgery, University Hospital of Lausanne
| | | | - Etienne Pralong
- 1Department of Neurosurgery, University Hospital of Lausanne
| | - Judith Kalser
- 3Department of Pediatrics, Section of Neuro-Pediatrics, University Hospital of Lausanne, Switzerland; and
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Kamalboor H, Alhindi H, Alotaibi F, Althubaiti I, Alkhateeb M. Frontal disconnection surgery for drug-resistant epilepsy: Outcome in a series of 16 patients. Epilepsia Open 2020; 5:475-486. [PMID: 32913955 PMCID: PMC7469852 DOI: 10.1002/epi4.12424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/25/2020] [Accepted: 07/22/2020] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVE To evaluate the effectiveness of frontal disconnection surgery in seizure control and related consequences in a consecutive patient series. METHODS We conducted a retrospective analysis of patients who underwent frontal disconnection surgery for drug-resistant epilepsy (DRE). Baseline epilepsy characteristics, detailed presurgical evaluation including epileptogenic zone (EZ) localization, magnetic resonance imaging (MRI) detection of epileptogenic lesion, and pathological findings were reviewed. Patients were followed postoperatively for seizure outcome at 1 year. RESULTS A total of 16 patients were identified (six children and 10 adults). Most patients had a childhood onset of DRE with a median duration of epilepsy of 6.5 years (interquartile range 3.5-17.5 years) before surgery. In 10 (62.5%) patients, the EZ was localized to the frontal lobe, while in six patients, the EZ involved also adjacent lobes or consisted of multiple foci. In 10 (62.5%) patients, an epileptogenic lesion was detected on presurgical MRI, four of which (40%) had all MRI abnormalities confined to the frontal lobe. Two-thirds of the patients (11/16; 68.8%) underwent isolated frontal disconnection procedure, while remaining patients had frontal disconnection combined with resection of an adjacent lobe. Of the 12 patients in whom biopsy was taken from the disconnected frontal lobe, six (50%) had pathology-proven focal cortical dysplasia. We observed surgical-related complications in three (18.8%) cases, neurological deficits in other three (18.8%) patients, and worsening cognitive abilities in one (6.3%) patient. Overall, eight (50%) patients became completely seizure-free (ILAE 1) at one-year follow-up. SIGNIFICANCE Frontal disconnection surgery for DRE can result in seizure freedom in certain patients, especially when the EZ is strictly limited to the ipsilateral frontal region, and the MRI shows an epileptogenic lesion that is purely frontal in location. Frontal lobe disconnection procedure is safe and has a limited complication rate. However, further studies with larger patient population will yield more significance.
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Affiliation(s)
- Hamda Kamalboor
- King Faisal Specialist Hospital & Research CenterRiyadhSaudi Arabia
- Rashid HospitalDubaiUnited Arab Emirates
| | - Hindi Alhindi
- King Faisal Specialist Hospital & Research CenterRiyadhSaudi Arabia
| | - Faisal Alotaibi
- King Faisal Specialist Hospital & Research CenterRiyadhSaudi Arabia
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Pearce K, Dixon L, D'Arco F, Pujar S, Das K, Tahir Z, Tisdall M, Mankad K. Epilepsy surgery in children: what the radiologist needs to know. Neuroradiology 2020; 62:1061-1078. [PMID: 32435887 DOI: 10.1007/s00234-020-02448-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 03/27/2020] [Indexed: 12/18/2022]
Abstract
This review updates the radiologist on current epilepsy surgery practice in children, with a specific focus on the role of imaging in pre-surgical work-up, current and novel surgical techniques, expected post-surgical imaging appearances and important post-operative complications. A comprehensive review of the current and emerging international practices in paediatric epilepsy surgical planning and post-operative imaging is provided with details on case-based radiological findings. A detailed discussion of the pathophysiology and imaging features of different epileptogenic lesions will not be discussed as this is not the objective of this paper. Epilepsy surgery can be an effective method to control seizures in certain children with drug-resistant focal epilepsy. Early surgery in selected appropriate cases can lead to improved cognitive and developmental outcome. Advances in neurosurgical techniques, imaging and neuroanaesthesia have driven a parallel expansion in the array of epilepsy conditions which are potentially treatable with surgery. The range of surgical options is now wide, including minimally invasive ablative procedures for small lesions such as hypothalamic hamartomata, resections for focal lesions like hippocampal sclerosis and complex disconnective surgeries for multilobar conditions like Sturge Weber Syndrome and diffuse cortical malformations. An awareness of the surgical thinking when planning epilepsy surgery in children, and the practical knowledge of the operative steps involved will promote more accurate radiology reporting of the post-operative scan.
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Affiliation(s)
- Kirsten Pearce
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Luke Dixon
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Felice D'Arco
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Suresh Pujar
- Department of Neurology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Krishna Das
- Department of Neurology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Zubair Tahir
- Department of Neurosurgery, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Martin Tisdall
- Department of Neurosurgery, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK
| | - Kshitij Mankad
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London, WC1N 3JH, UK.
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Gonzalez-Lopez P, Cossu G, Pralong E, Baldoncini M, Messerer M, Daniel RT. Anterior peri-insular quadrantotomy: a cadaveric white matter dissection study. J Neurosurg Pediatr 2020; 25:331-339. [PMID: 31860823 DOI: 10.3171/2019.10.peds19472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/21/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Anterior quadrant disconnection represents a safe surgical option in well-selected pediatric patients with a large frontal lobe lesion anterior to the motor cortex. The understanding of the anatomy of the white matter tracts connecting the frontal lobe with the rest of the cerebrum forms the basis of a safe and successful disconnective surgery. The authors explored and illustrated the relevant white matter tracts sectioned during each surgical step using fiber dissection techniques. METHODS Five human cadaveric hemispheres were dissected to illustrate the frontal connections in the 3 planes. The dissections were performed from lateral to medial, medial to lateral, and ventral to dorsal to describe the various tracts sectioned during the 4 steps of this surgery, namely the anterior suprainsular window, intrafrontal disconnection, anterior callosotomy, and frontobasal disconnection. RESULTS At the beginning of each surgical step, the U fibers were cut. During the anterior suprainsular window, the superior longitudinal fasciculus (SLF), the uncinate fasciculus, and the inferior fronto-occipital fasciculus (IFOF) were visualized and sectioned, followed by sectioning of the anterior limb of the internal capsule. During the intrafrontal disconnection, the SLF was cut, along with the corona radiata. At the medial surface the cingulum was sectioned. The anterior callosotomy disconnected the anterior third of the body of the callosum, the genu, and the rostrum. The frontobasal disconnection addressed the last remaining fibers connecting the frontal lobe with the rest of the hemisphere, namely the anterior limb of the anterior commissure. CONCLUSIONS The anterior peri-insular quadrantotomy aims at effectively treating children with large lesions of the frontal lobe anterior to the motor cortex. A precise understanding of the gyral anatomy of this lobe along with the several white matter connections is crucial to avoid motor complications and to ensure complete disconnection.
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Affiliation(s)
| | - Giulia Cossu
- 2Department of Neurosurgery, University Hospital of Lausanne, Switzerland
| | - Etienne Pralong
- 2Department of Neurosurgery, University Hospital of Lausanne, Switzerland
| | - Matias Baldoncini
- 3Department of Neurological Surgery, San Fernando Hospital, Buenos Aires, Argentina; and
| | - Mahmoud Messerer
- 2Department of Neurosurgery, University Hospital of Lausanne, Switzerland
- 4Faculty of Medicine and Biology, University of Lausanne, Switzerland
| | - Roy Thomas Daniel
- 2Department of Neurosurgery, University Hospital of Lausanne, Switzerland
- 4Faculty of Medicine and Biology, University of Lausanne, Switzerland
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Hirata S, Morino M, Nakae S, Matsumoto T. Surgical Technique and Outcome of Extensive Frontal Lobectomy for Treatment of Intracable Non-lesional Frontal Lobe Epilepsy. Neurol Med Chir (Tokyo) 2020; 60:17-25. [PMID: 31801933 PMCID: PMC6970070 DOI: 10.2176/nmc.oa.2018-0286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Although extensive frontal lobectomy (eFL) is a common surgical procedure for intractable frontal lobe epilepsy (FLE), there have been very few reports regarding surgical techniques for eFL. This article provides step-by-step descriptions of our surgical technique for non-lesional FLE. Sixteen patients undergoing eFL were included in this study. The goals were to maximize gray matter removal, including the orbital gyrus and subcallosal area, and to spare the primary motor and premotor cortexes and anterior perforated substance. The eFL consists of three steps: (1) positioning, craniotomy, and exposure; (2) lateral frontal lobe resection; and (3), resection of the rectus gyrus and orbital gyrus. Resection ahead of bregma allows preservation of motor and premotor area function. To remove the orbital gyrus preserving anterior perforated substance, it is essential to visualize the olfactory trigone beneath the pia. It is important to observe the surface of the contralateral medial frontal lobe for complete removal of the subcallosal area of the frontal lobe. Thirteen patients (81.25%) became seizure-free and three patients (18.75%) continued to have seizures. None of the patients showed any complications. The eFL is a good surgical technique for the treatment of intractable non-lesional FLE. For treatment of epilepsy by eFL, it is important to resect the non-eloquent area of the frontal lobe as much as possible with preservation of the eloquent cortex.
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Scavarda D, Cavalcante T, Trébuchon A, Lépine A, Villeneuve N, Girard N, McGonigal A, Milh M, Bartolomei F. Tailored suprainsular partial hemispherotomy: a new functional disconnection technique for stroke-induced refractory epilepsy. J Neurosurg Pediatr 2018; 22:601-609. [PMID: 30141751 DOI: 10.3171/2018.5.peds17709] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 05/22/2018] [Indexed: 01/05/2023]
Abstract
OBJECTIVEHemispherotomy is currently the most frequently performed surgical option for refractory epilepsy associated with large perinatal or childhood ischemic events. Such an approach may lead to good seizure control, but it has inherent functional consequences linked to the disconnection of functional cortices. The authors report on 6 consecutive patients who presented with severe epilepsy associated with hemiplegia due to stroke and who benefitted from a new, stereoelectroencephalography-guided partial disconnection technique.METHODSThe authors developed a new disconnection technique termed "tailored suprainsular partial hemispherotomy" (TSIPH). Disconnection always included premotor and motor cortex with variable anterior and posterior extent.RESULTSAt a mean follow-up of 28 months, there were no deaths and no patient had hydrocephalus. Motor degradation was observed in all patients in the 2 weeks after surgery, but all patients completely recovered. The 6 patients were seizure free (Engel class IA) at the last follow-up. No neuropsychological aggravation was observed.CONCLUSIONSTSIPH appears to be a conservative alternative to classic hemispherotomy, leading to favorable outcome in this series.
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Affiliation(s)
| | | | - Agnès Trébuchon
- 2Institut de Neurosciences des Systèmes, Aix Marseille Université; and
- 3Neurophysiologie Clinique
| | - Anne Lépine
- 4Neurologie Pédiatrique, and
- 5Hôpital Henri Gastaut, Marseille, France
| | | | | | - Aileen McGonigal
- 2Institut de Neurosciences des Systèmes, Aix Marseille Université; and
- 3Neurophysiologie Clinique
| | | | - Fabrice Bartolomei
- 2Institut de Neurosciences des Systèmes, Aix Marseille Université; and
- 3Neurophysiologie Clinique
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