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Kram L, Neu B, Schroeder A, Wiestler B, Meyer B, Krieg SM, Ille S. Toward a systematic grading for the selection of patients to undergo awake surgery: identifying suitable predictor variables. Front Hum Neurosci 2024; 18:1365215. [PMID: 38756845 PMCID: PMC11096515 DOI: 10.3389/fnhum.2024.1365215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 04/11/2024] [Indexed: 05/18/2024] Open
Abstract
Background Awake craniotomy is the standard of care for treating language eloquent gliomas. However, depending on preoperative functionality, it is not feasible in each patient and selection criteria are highly heterogeneous. Thus, this study aimed to identify broadly applicable predictor variables allowing for a more systematic and objective patient selection. Methods We performed post-hoc analyses of preoperative language status, patient and tumor characteristics including language eloquence of 96 glioma patients treated in a single neurosurgical center between 05/2018 and 01/2021. Multinomial logistic regression and stepwise variable selection were applied to identify significant predictors of awake surgery feasibility. Results Stepwise backward selection confirmed that a higher number of paraphasias, lower age, and high language eloquence level were suitable indicators for an awake surgery in our cohort. Subsequent descriptive and ROC-analyses indicated a cut-off at ≤54 years and a language eloquence level of at least 6 for awake surgeries, which require further validation. A high language eloquence, lower age, preexisting semantic and phonological aphasic symptoms have shown to be suitable predictors. Conclusion The combination of these factors may act as a basis for a systematic and standardized grading of patients' suitability for an awake craniotomy which is easily integrable into the preoperative workflow across neurosurgical centers.
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Affiliation(s)
- Leonie Kram
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University of Heidelberg, Heidelberg, Germany
| | - Beate Neu
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Benedikt Wiestler
- Section of Diagnostic and Interventional Neuroradiology, Department of Radiology, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University of Heidelberg, Heidelberg, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University of Heidelberg, Heidelberg, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
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Ille S, Zhang H, Stassen N, Schwendner M, Schröder A, Wiestler B, Meyer B, Krieg SM. Noninvasive- and invasive mapping reveals similar language network centralities - A function-based connectome analysis. Cortex 2024; 174:189-200. [PMID: 38569257 DOI: 10.1016/j.cortex.2024.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/11/2023] [Accepted: 01/23/2024] [Indexed: 04/05/2024]
Abstract
BACKGROUND Former comparisons between direct cortical stimulation (DCS) and navigated transcranial magnetic stimulation (nTMS) only focused on cortical mapping. While both can be combined with diffusion tensor imaging, their differences in the visualization of subcortical and even network levels remain unclear. Network centrality is an essential parameter in network analysis to measure the importance of nodes identified by mapping. Those include Degree centrality, Eigenvector centrality, Closeness centrality, Betweenness centrality, and PageRank centrality. While DCS and nTMS have repeatedly been compared on the cortical level, the underlying network identified by both has not been investigated yet. METHOD 27 patients with brain lesions necessitating preoperative nTMS and intraoperative DCS language mapping during awake craniotomy were enrolled. Function-based connectome analysis was performed based on the cortical nodes obtained through the two mapping methods, and language-related network centralities were compared. RESULTS Compared with DCS language mapping, the positive predictive value of cortical nTMS language mapping is 74.1%, with good consistency of tractography for the arcuate fascicle and superior longitudinal fascicle. Moreover, network centralities did not differ between the two mapping methods. However, ventral stream tracts can be better traced based on nTMS mappings, demonstrating its strengths in acquiring language-related networks. In addition, it showed lower centralities than other brain areas, with decentralization as an indicator of language function loss. CONCLUSION This study deepens the understanding of language-related functional anatomy and proves that non-invasive mapping-based network analysis is comparable to the language network identified via invasive cortical mapping.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany; TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany; Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
| | - Haosu Zhang
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany; Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
| | - Nina Stassen
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany.
| | - Maximilian Schwendner
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany; Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
| | - Axel Schröder
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany.
| | - Benedikt Wiestler
- Department of Diagnostic and Interventional Neuroradiology, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany; TranslaTUM (Zentralinstitut für translationale Krebsforschung der Technischen Universität München), Munich, Germany.
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany.
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany; TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany; Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
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Gerritsen JKW, Young JS, Chang SM, Krieg SM, Jungk C, van den Bent MJ, Satoer DD, Ille S, Schucht P, Nahed BV, Broekman MLD, Berger M, De Vleeschouwer S, Vincent AJPE. SUPRAMAX-study: supramaximal resection versus maximal resection for glioblastoma patients: study protocol for an international multicentre prospective cohort study (ENCRAM 2201). BMJ Open 2024; 14:e082274. [PMID: 38684246 PMCID: PMC11086386 DOI: 10.1136/bmjopen-2023-082274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 02/27/2024] [Indexed: 05/02/2024] Open
Abstract
INTRODUCTION A greater extent of resection of the contrast-enhancing (CE) tumour part has been associated with improved outcomes in glioblastoma. Recent results suggest that resection of the non-contrast-enhancing (NCE) part might yield even better survival outcomes (supramaximal resection, SMR). Therefore, this study evaluates the efficacy and safety of SMR with and without mapping techniques in high-grade glioma (HGG) patients in terms of survival, functional, neurological, cognitive and quality of life outcomes. Furthermore, it evaluates which patients benefit the most from SMR, and how they could be identified preoperatively. METHODS AND ANALYSIS This study is an international, multicentre, prospective, two-arm cohort study of observational nature. Consecutive glioblastoma patients will be operated with SMR or maximal resection at a 1:1 ratio. Primary endpoints are (1) overall survival and (2) proportion of patients with National Institute of Health Stroke Scale deterioration at 6 weeks, 3 months and 6 months postoperatively. Secondary endpoints are (1) residual CE and NCE tumour volume on postoperative T1-contrast and FLAIR (Fluid-attenuated inversion recovery) MRI scans; (2) progression-free survival; (3) receipt of adjuvant therapy with chemotherapy and radiotherapy; and (4) quality of life at 6 weeks, 3 months and 6 months postoperatively. The total duration of the study is 5 years. Patient inclusion is 4 years, follow-up is 1 year. ETHICS AND DISSEMINATION The study has been approved by the Medical Ethics Committee (METC Zuid-West Holland/Erasmus Medical Center; MEC-2020-0812). The results will be published in peer-reviewed academic journals and disseminated to patient organisations and media.
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Affiliation(s)
- Jasper Kees Wim Gerritsen
- Neurosurgery, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Neurosurgery, University of California San Francisco, San Francisco, California, USA
| | - Jacob S Young
- Department of Neurosurgery, University of California San Francisco, San Francisco, California, USA
| | - Susan M Chang
- Department of Neurosurgery, University of California San Francisco, San Francisco, California, USA
| | - Sandro M Krieg
- Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Baden-Württemberg, Germany
| | - Christine Jungk
- Neuro-oncology, UniversitatsKlinikum Heidelberg, Heidelberg, Germany
| | - Martin J van den Bent
- Department of Neuro Oncology, Erasmus Medical Center, Rotterdam, Zuid-Holland, The Netherlands
| | - Djaina D Satoer
- Neurosurgery, Erasmus Medical Center, Rotterdam, Zuid-Holland, The Netherlands
| | - Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, Munich, Bayern, Germany
| | - Philippe Schucht
- Neurosurgery, Inselspital Universitätsspital Bern, Bern, Switzerland
| | - Brian V Nahed
- Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | | | - Mitchel Berger
- University of California San Francisco, San Francisco, California, USA
| | | | - Arnaud J P E Vincent
- Department of Neurosurgery, Erasmus Medical Center, Rotterdam, Zuid-Holland, The Netherlands
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Kram L, Schroeder A, Meyer B, Krieg SM, Ille S. Function-guided differences of arcuate fascicle and inferior fronto-occipital fascicle tractography as diagnostic indicators for surgical risk stratification. Brain Struct Funct 2024:10.1007/s00429-024-02787-3. [PMID: 38597941 DOI: 10.1007/s00429-024-02787-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 03/05/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND Several patients with language-eloquent gliomas face language deterioration postoperatively. Persistent aphasia is frequently associated with damage to subcortical language pathways. Underlying mechanisms still need to be better understood, complicating preoperative risk assessment. This study compared qualitative and quantitative functionally relevant subcortical differences pre- and directly postoperatively in glioma patients with and without aphasia. METHODS Language-relevant cortical sites were defined using navigated transcranial magnetic stimulation (nTMS) language mapping in 74 patients between 07/2016 and 07/2019. Post-hoc nTMS-based diffusion tensor imaging tractography was used to compare a tract's pre- and postoperative visualization, volume and fractional anisotropy (FA), and the preoperative distance between tract and lesion and postoperative overlap with the resection cavity between the following groups: no aphasia (NoA), tumor- or previous resection induced aphasia persistent pre- and postoperatively (TIA_P), and surgery-induced transient or permanent aphasia (SIA_T or SIA_P). RESULTS Patients with NoA, TIA_P, SIA_T, and SIA_P showed distinct fasciculus arcuatus (AF) and inferior-fronto-occipital fasciculus (IFOF) properties. The AF was more frequently reconstructable, and the FA of IFOF was higher in NoA than TIA_P cases (all p ≤ 0.03). Simultaneously, SIA_T cases showed higher IFOF fractional anisotropy than TIA_P cases (p < 0.001) and the most considerable AF volume loss overall. While not statistically significant, the four SIA_P cases showed complete loss of ventral language streams postoperatively, the highest resection-cavity-AF-overlap, and the shortest AF to tumor distance. CONCLUSION Functionally relevant qualitative and quantitative differences in AF and IFOF provide a pre- and postoperative pathophysiological and clinically relevant diagnostic indicator that supports surgical risk stratification.
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Affiliation(s)
- Leonie Kram
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University, Heidelberg, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University, Heidelberg, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany.
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University, Heidelberg, Germany.
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Schwendner M, Schroeder A, Job K, Meyer B, Ille S, Krieg SM. Cortical stimulation depth of nTMS investigated in a cohort of convexity meningiomas above the primary motor cortex. J Neurosci Methods 2024; 404:110062. [PMID: 38309312 DOI: 10.1016/j.jneumeth.2024.110062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 01/10/2024] [Accepted: 01/27/2024] [Indexed: 02/05/2024]
Abstract
BACKGROUND In clinical routine, navigated transcranial magnetic stimulation (nTMS) is usually applied down to 25 mm. Yet, besides clinical experience and mathematical models, the penetration depth remains unclear. This study aims to investigate the maximum cortical stimulation depth of nTMS in patients with meningioma above the primary motor cortex, causing a displacement of the primary motor cortex away from the skull. NEW METHOD nTMS stimulation data was reviewed regarding the maximum depth of stimulations eliciting motor-evoked potentials (MEPs). Additionally, electric field values and stimulation intensity were analyzed. RESULTS Out of a consecutive cohort of 17 meningioma cases, 3 cases of meningioma located in motor-eloquent regions of the upper extremity and 3 cases of the lower extremity were analyzed after fulfilling all inclusion criteria. Regarding the upper extremity motor representations, the MEP could be elicited at a stimulation depth of up to 44 mm, with an electric field of 69 V/m. These results were found in 1 case with the maximum potential distance to the cortex being higher than the maximum stimulation depth eliciting MEPs. For the lower extremities, a maximum depth of 40 mm was recorded (electric field 64 V/m). COMPARISON WITH EXISTING METHODS None available CONCLUSIONS: The effect of nTMS is not limited to superficial cortical stimulation alone. Depending on electric-field intensity and focality, nTMS stimulation can be applied at a depth of 44 mm. In all cases, electric field strength was comparable and no superficial cortex with comparable electric field strength was observed to elicit MEPs.
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Affiliation(s)
- Maximilian Schwendner
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Germany; Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Germany
| | - Kim Job
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Germany.
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Zhang H, Zhang W, Ohlerth A, Schwendner M, Schröder A, Meyer B, Krieg SM, Ille S. Motor mapping of the hand muscles using peripheral innervation-based navigated transcranial magnetic stimulation to identify functional reorganization of primary motor regions in malignant tumors. Hum Brain Mapp 2024; 45:e26642. [PMID: 38433701 PMCID: PMC10910269 DOI: 10.1002/hbm.26642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 02/16/2024] [Accepted: 02/18/2024] [Indexed: 03/05/2024] Open
Abstract
Tumor-related motor reorganization remains unclear. Navigated transcranial magnetic stimulation (nTMS) can investigate plasticity non-invasively. nTMS-induced motor-evoked potentials (MEPs) of different muscles are commonly used to measure the center of gravity (CoG), the location with the highest density of corticospinal neurons in the precentral gyrus. We hypothesized that a peripheral innervation-based MEP analysis could outline the tumor-induced motor reorganization with a higher clinical and oncological relevance. Then, 21 patients harboring tumors inside the left corticospinal tract (CST) or precentral gyrus were enrolled in group one (G1), and 24 patients with tumors outside the left CST or precentral gyrus were enrolled in Group 2 (G2). Median- and ulnar-nerve-based MEP analysis combined with diffusion tensor imaging fiber tracking was used to explore motor function distribution. There was no significant difference in CoGs or size of motor regions and underlying tracts between G1 and G2. However, G1 involved a sparser distribution of motor regions and more motor-positive sites in the supramarginal gyrus-tumors inside motor areas induced motor reorganization. We propose an "anchor-and-ship theory" hypothesis for this process of motor reorganization: motor CoGs are stably located in the cortical projection area of the CST, like a seated anchor, as the core area for motor output. Primary motor regions can relocate to nearby gyri via synaptic plasticity and association fibers, like a ship moving around its anchor. This principle can anticipate functional reorganization and be used as a neuro-oncological tool for local therapy, such as radiotherapy or surgery.
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Affiliation(s)
- Haosu Zhang
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
- Department of NeurosurgeryHeidelberg University HospitalHeidelbergGermany
| | - Wei Zhang
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
| | - Ann‐Katrin Ohlerth
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
- Center for Language and Cognition GroningenUniversity of GroningenGroningenNetherlands
| | - Maximilian Schwendner
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
- Department of NeurosurgeryHeidelberg University HospitalHeidelbergGermany
| | - Axel Schröder
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
| | - Bernhard Meyer
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
| | - Sandro M. Krieg
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
- Department of NeurosurgeryHeidelberg University HospitalHeidelbergGermany
- TUM‐Neuroimaging CenterTechnical University of Munich, School of MedicineMunichGermany
| | - Sebastian Ille
- Department of NeurosurgeryTechnical University of Munich, School of MedicineMunichGermany
- Department of NeurosurgeryHeidelberg University HospitalHeidelbergGermany
- TUM‐Neuroimaging CenterTechnical University of Munich, School of MedicineMunichGermany
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Kram L, Ohlerth AK, Ille S, Meyer B, Krieg SM. CompreTAP: Feasibility and reliability of a new language comprehension mapping task via preoperative navigated transcranial magnetic stimulation. Cortex 2024; 171:347-369. [PMID: 38086145 DOI: 10.1016/j.cortex.2023.09.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 02/01/2023] [Accepted: 09/25/2023] [Indexed: 02/12/2024]
Abstract
OBJECTIVE Stimulation-based language mapping approaches that are used pre- and intraoperatively employ predominantly overt language tasks requiring sufficient language production abilities. Yet, these production-based setups are often not feasible in brain tumor patients with severe expressive aphasia. This pilot study evaluated the feasibility and reliability of a newly developed language comprehension task with preoperative navigated transcranial magnetic stimulation (nTMS). METHODS Fifteen healthy subjects and six brain tumor patients with severe expressive aphasia unable to perform classic overt naming tasks underwent preoperative nTMS language mapping based on an auditory single-word Comprehension TAsk for Perioperative mapping (CompreTAP). Comprehension was probed by button-press responses to auditory stimuli, hence not requiring overt language responses. Positive comprehension areas were identified when stimulation elicited an incorrect or delayed button press. Error categories, case-wise cortical error rate distribution and inter-rater reliability between two experienced specialists were examined. RESULTS Overall, the new setup showed to be feasible. Comprehension-disruptions induced by nTMS manifested in no responses, delayed or hesitant responses, searching behavior or selection of wrong target items across all patients and controls and could be performed even in patients with severe expressive aphasia. The analysis agreement between both specialists was substantial for classifying comprehension-positive and -negative sites. Extensive left-hemispheric individual cortical comprehension sites were identified for all patients. Apart from one case presenting with transient worsening of aphasic symptoms, pre-existing language deficits did not aggravate if results were used for subsequent surgical planning. CONCLUSION Employing this new comprehension-based nTMS setup allowed to identify language relevant cortical sites in all healthy subjects and severely aphasic patients who were thus far precluded from classic production-based mapping. This pilot study, moreover, provides first indications that the CompreTAP mapping results may support the preservation of residual language function if used for subsequent surgical planning.
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Affiliation(s)
- Leonie Kram
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany; Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany
| | - Ann-Katrin Ohlerth
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany; Neurobiology of Language Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany; TUM Neuroimaging Center, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany; Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany; TUM Neuroimaging Center, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Germany; Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany.
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Albrecht C, Baumgart L, Schroeder A, Wiestler B, Meyer B, Krieg SM, Ille S. Impact of function-guided glioma treatment on oncological outcome in the elderly. Brain Spine 2024; 4:102742. [PMID: 38510620 PMCID: PMC10951774 DOI: 10.1016/j.bas.2023.102742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/18/2023] [Accepted: 12/28/2023] [Indexed: 03/22/2024]
Abstract
Introduction Many patients with high-grade gliomas (HGG) are of older age. Research question We hypothesize that pre- and intraoperative mapping and monitoring preserve functional status in elderly patients while gross total resection (GTR) is the aim, resulting in overall survival (OS) rates comparable to the general population with HGG. Material and methods We subdivided a prospective cohort of 168 patients above 65 years with eloquent high-grade gliomas into four groups ([years/cases] 1: 65-69/58; 2: 70-74/47; 3: 75-79/43; 4: >79/20). All patients underwent preoperative noninvasive mapping, which was also used for decision-making, intraoperative neuromonitoring in 138 cases, direct cortical and/or subcortical motor mapping in 66 and 50 cases, and awake language mapping in 11 cases. Results GTR and subtotal resection (STR) could be achieved in 65% and 28%, respectively. Stereotactic biopsy was performed in 8% of cases. Postoperatively, we found transient and permanent functional deficits in 13% and 11% of cases. Postoperative Karnofsky Performance Scale (KPS) did not differ between subgroups. Patients with long-term follow-up (51%) had a progression-free survival of 5.5 (1-47) months and an overall survival of 10.5 (0-86) months. Discussion and conclusion The interdisciplinary glioma treatment in the elderly is less age-dependent but must be adjusted to the functional status. Function-guided surgical resections could be performed as usual, with maximal tumor resection being the primary goal. However, less network capacity in the elderly to compensate for deficits might cause higher rates of permanent deficits in this group of patients with more fast-growing malignant gliomas.
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Affiliation(s)
- Carolin Albrecht
- Department of Neurosurgery, Technical University of Munich, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Lea Baumgart
- Department of Neurosurgery, Technical University of Munich, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Technical University of Munich, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Benedikt Wiestler
- Section of Diagnostic and Interventional Neuroradiology Department of Radiology, Klinikum Rechts der Isar, School of Medicine, Technische Universität München, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
- Department of Diagnostic and Interventional Neuroradiology, Technical University of Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University of Munich, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, Technical University of Munich, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, Germany
- School of Medicine, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
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Schwendner M, Ille S, Wostrack M, Meyer B. Evaluating a cutting-edge augmented reality-supported navigation system for spinal instrumentation. Eur Spine J 2024; 33:282-288. [PMID: 37962688 DOI: 10.1007/s00586-023-08011-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 08/27/2023] [Accepted: 10/16/2023] [Indexed: 11/15/2023]
Abstract
OBJECTIVE Dorsal instrumentation using pedicle screws is a standard treatment for multiple spinal pathologies, such as trauma, infection, or degenerative indications. Intraoperative three-dimensional (3D) imaging and navigated pedicle screw placement are used at multiple centers. For the present study, we evaluated a new navigation system enabling augmented reality (AR)-supported pedicle screw placement while integrating navigation cameras into the reference array and drill guide. The present study aimed to evaluate its clinical application regarding safety, efficacy, and accuracy. METHODS A total of 20 patients were operated on between 06/2021 and 01/2022 using the new technique for intraoperative navigation. Intraoperative data with a focus on accuracy and patient safety, including patient outcome, were analyzed. The accuracy of pedicle screw placement was evaluated by intraoperative CT imaging. RESULTS A median of 8 (4-18) pedicle screws were placed in each case. Percutaneous instrumentation was performed in 14 patients (70%). The duration of pedicle screw placement (duration scan-scan) was 56 ± 26 (30-107) min. Intraoperative screw revision was necessary for 3 of 180 pedicle screws (1.7%). Intraoperatively, no major complications occurred-one case of delay due to software issues and one case of difficult screw placement were reported. CONCLUSION The current study's results could confirm the use of the present AR-supported system for navigated pedicle screw placement for dorsal instrumentation in clinical routine. It provides a reliable and safe tool for 3D imaging-based pedicle screw placement, only requires a minimal intraoperative setup, and provides new opportunities by integrating AR.
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Affiliation(s)
- Maximilian Schwendner
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
- TUM Neuroimaging Center, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany.
- TUM Neuroimaging Center, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany.
| | - Maria Wostrack
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
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Joerger AK, Laho X, Kehl V, Meyer B, Krieg SM, Ille S. The impact of intraoperative MRI on cranial surgical site infections-a single-center analysis. Acta Neurochir (Wien) 2023; 165:3593-3599. [PMID: 37971620 PMCID: PMC10739228 DOI: 10.1007/s00701-023-05870-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/14/2023] [Indexed: 11/19/2023]
Abstract
PURPOSE The use of intraoperative MRI (ioMRI) contributes to an improved extent of resection. Hybrid operating room MRI suites have been established, with the patient being transferred to the MRI scanner. In the present descriptive analysis, we compared the rate of surgical site infections (SSI) after intracranial tumor surgery with and without the use of ioMRI. METHODS In this retrospective study, we included 446 patients with open craniotomy performed for brain tumor surgery. One hundred fourteen patients were operated on with the use of ioMRI between June 1, 2018, and June 30, 2019 (group 1). During the same period, 126 patients were operated on without ioMRI (group 2). As an additional control group, we analyzed 206 patients operated on from February 1, 2017, to February 28, 2018 when ioMRI had not yet been implemented (group 3). RESULTS The rate of SSI in group 1 (11.4%), group 2 (9.5%), and group 3 (6.8%) did not differ significantly (p = 0.352). Additional resection after ioMRI did not result in a significantly elevated number of SSI. No significant influence of re-resection, prior radio-/chemotherapy, blood loss or duration of surgery was found on the incidence of SSI. CONCLUSION Despite the transfer to a non-sterile MRI scanner, leading to a prolonged operation time, SSI rates with and without the use of ioMRI did not differ significantly. Hence, advantages of ioMRI outweigh potential disadvantages as confirmed by this real-life single-center study.
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Affiliation(s)
- Ann-Kathrin Joerger
- Department of Neurosurgery, Technical University of Munich, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany
| | - Xhimi Laho
- Department of Neurosurgery, Technical University of Munich, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany
| | - Victoria Kehl
- Institute for AI and Informatics in Medicine, Technical University of Munich, Ismaninger Str. 22, 81675, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University of Munich, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University of Munich, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany.
| | - Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany
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Kram L, Neu B, Schröder A, Meyer B, Krieg SM, Ille S. Improving specificity of stimulation-based language mapping in stuttering glioma patients: A mixed methods serial case study. Heliyon 2023; 9:e21984. [PMID: 38045205 PMCID: PMC10692765 DOI: 10.1016/j.heliyon.2023.e21984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/29/2023] [Accepted: 11/01/2023] [Indexed: 12/05/2023] Open
Abstract
Objective Stimulation-based language mapping relies on identifying stimulation-induced language disruptions, which preexisting speech disorders affecting the laryngeal and orofacial speech system can confound. This study ascertained the effects of preexisting stuttering on pre- and intraoperative language mapping to improve the reliability and specificity of established language mapping protocols in the context of speech fluency disorders. Method Differentiation-ability of a speech therapist and two experienced nrTMS examiners between stuttering symptoms and stimulation-induced language errors during preoperative mappings were retrospectively compared (05/2018-01/2021). Subsequently, the impact of stuttering on intraoperative mappings was evaluated in all prospective patients (01/2021-12/2022). Results In the first part, 4.85 % of 103 glioma patients stuttered. While both examiners had a significant agreement for misclassifying pauses in speech flow and prolongations (Κ ≥ 0.50, p ≤ 0.02, respectively), less experience resulted in more misclassified stuttering symptoms. In one awake surgery case within the second part, stuttering decreased the reliability of intraoperative language mapping.Comparison with Existing Method(s): By thoroughly differentiating speech fluency symptoms from stimulation-induced disruptions, the reliability and proportion of stuttering symptoms falsely attributed to stimulation-induced language network disruptions can be improved. This may increase the consistency and specificity of language mapping results in stuttering glioma patients. Conclusions Preexisting stuttering negatively impacted language mapping specificity. Thus, surgical planning and the functional outcome may benefit substantially from thoroughly differentiating speech fluency symptoms from stimulation-induced disruptions by trained specialists.
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Affiliation(s)
- Leonie Kram
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany
| | - Beate Neu
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Axel Schröder
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany
- Department of Neurosurgery, Heidelberg University Hospital, Ruprecht-Karls-University Heidelberg, Germany
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12
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Liang R, Schwendner M, Grziwotz M, Wiestler B, Wostrack M, Meyer B, Krieg SM, Ille S. Improving tractography in brainstem cavernoma patients by distortion correction. Brain Spine 2023; 3:102685. [PMID: 38021010 PMCID: PMC10668098 DOI: 10.1016/j.bas.2023.102685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/16/2023] [Accepted: 10/04/2023] [Indexed: 12/01/2023]
Abstract
Introduction The resection of brainstem cerebral cavernous malformations (CCM) harbors the risk of damaging the corticospinal tract (CST) and other major tracts. Hence, visualization of eloquent fiber tracts supports pre- and intraoperative planning. However, diffusion tensor imaging fiber tracking at brainstem level suffers from distortion due to field inhomogeneities and eddy currents by steep diffusion gradients. Research question This study aims to analyze the effect of distortion correction for CST tractography in brainstem CCM patients. Material and methods 25 patients who underwent resection of brainstem CCM were enrolled, 24 suffered from hemorrhage. We performed an anatomically based tractography of the CST with a mean minimal fractional anisotropy of 0.22 ± 0.04 before and after cranial distortion correction (CDC). Accuracy was measured by anatomical plausibility and aberrant fibers. Results CDC led to a more precise CST tractography, further approximating its assumed anatomical localization in all cases. CDC resulted in a significantly more ventral location of the CST of 1.5 ± 0.6 mm (6.1 ± 2.7 mm before CDC vs. 4.6 ± 2.1 mm after CDC; p < .0001) as measured by the distance to the basilar artery and of 1.7 ± 0.6 mm (8.9 ± 2.7 mm vs. 7.2 ± 2.1 mm; p < .0001) in relation to the clivus. Aberrant fibers were reduced by CDC in 44% of cases. We found a mean difference in CST volume of 0.6 ± 0.8 ccm. We could not detect motor deficits after resection of irregular fibers. Discussion and conclusion CDC effectively corrects tractography for distortion at brainstem level, especially in patients suffering from brainstem CCM, further approximating its actual anatomical localization.
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Affiliation(s)
- Raimunde Liang
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Maximilian Schwendner
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Marc Grziwotz
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Benedikt Wiestler
- Department of Diagnostic and Interventional Neuroradiology, Klinikum Rechts der Isar, School of Medicine, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Maria Wostrack
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany
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13
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Schwendner M, Liang R, Butenschöen VM, Krieg SM, Ille S, Meyer B. Spinal Navigation for Lateral Instrumentation of the Thoracolumbar Spine. Oper Neurosurg (Hagerstown) 2023; 25:303-310. [PMID: 37441800 DOI: 10.1227/ons.0000000000000803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 04/29/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Three-dimensional imaging-based navigation in spine surgery is mostly applied for pedicle screw placement. However, its potential reaches beyond. In this study, we analyzed the incorporation of spinal navigation for lateral instrumentation of the thoracolumbar spine in clinical routine at a high-volume spine center. METHODS Patients scheduled for lateral instrumentation were prospectively enrolled. A reference array was attached to the pelvis, and a computed tomography scan was acquired intraoperatively. A control computed tomography scan was routinely performed after final cage placement, replacing conventional 2-dimensional X-ray imaging. RESULTS 145 cases were enrolled from April to October 2021 with a median of 1 (1-4) level being instrumented. Indications for surgery were trauma (35.9%), spinal infection (31.7%), primary and secondary tumors of the spine (17.2%), and degenerative spine disease (15.2%). The duration of surgery after the first scan was 98 ± 41 (20-342) minutes. In total, 190 cages were implanted (94 expandable cages for vertebral body replacement (49.5%) and 96 cages for interbody fusion [50.5%]). Navigation was successfully performed in 139 cases (95.9%). The intraoperative mental load was rated on a scale from 0 to 150 (maximal effort) by the surgeons, showing a moderate effort (median 30 [10-120]). CONCLUSION Three-dimensional imaging-based spinal navigation can easily be incorporated in clinical routine and serves as a reliable tool to achieve precise implant placement in lateral instrumentation of the spine. It helps to minimize radiation exposure to the surgical staff.
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Affiliation(s)
- Maximilian Schwendner
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Munich, Germany
- TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany
| | - Raimunde Liang
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Vicki M Butenschöen
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Munich, Germany
- TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Munich, Germany
- TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Munich, Germany
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Baumgart L, Ille S, Kirschke JS, Meyer B, Krieg SM. Radiation doses and accuracy of navigated pedicle screw placement in cervical and thoracic spine surgery: a comparison of sliding gantry CT and mobile cone-beam CT in a homogeneous cohort. J Neurosurg Spine 2023; 39:363-369. [PMID: 37310023 DOI: 10.3171/2023.4.spine23174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/21/2023] [Indexed: 06/14/2023]
Abstract
OBJECTIVE Multiple solutions for navigation-guided pedicle screw placement are currently available. Intraoperative imaging techniques are invaluable for spinal surgery, but often there is little attention paid to patient radiation exposure. This study aimed to compare the applied radiation doses of sliding gantry CT (SGCT)- and mobile cone-beam CT (CBCT)-based pedicle screw placement for spinal instrumentation. METHODS The authors retrospectively analyzed 183 and 54 patients who underwent SGCT- or standard CBCT-based pedicle screw placement, respectively, for spinal instrumentation at their department between June 2019 and January 2020. SGCT uses an automated radiation dose adjustment. RESULTS Baseline characteristics, including the number of screws per patient and the number of instrumented levels, did not significantly differ between the two groups. Although the accuracy of screw placement according to Gertzbein-Robbins classification did not differ between the two groups, more screws had to be revised intraoperatively in the CBCT group (SGCT 2.7% vs CBCT 6.0%, p = 0.0036). Mean (± SD) radiation doses for the first (SGCT 484.0 ± 201.1 vs CBCT 687.4 ± 188.5 mGy*cm, p < 0.0001), second (SGCT 515.8 ± 216.3 vs CBCT 658.3 ± 220.1 mGy*cm, p < 0.0001), third (SGCT 531.3 ± 237.5 vs CBCT 641.6 ± 177.3 mGy*cm, p = 0.0140), and total (SGCT 1216.9 ± 699.3 vs CBCT 2000.3 ± 921.0 mGy*cm, p < 0.0001) scans were significantly lower for SGCT. This was also true for radiation doses per scanned level (SGCT 461.9 ± 429.3 vs CBCT 1004.1 ± 905.1 mGy*cm, p < 0.0001) and radiation doses per screw (SGCT 172.6 ± 110.1 vs CBCT 349.6 ± 273.4 mGy*cm, p < 0.0001). CONCLUSIONS The applied radiation doses were significantly lower using SGCT for navigated pedicle screw placement in spinal instrumentation. A modern CT scanner on a sliding gantry leads to lower radiation doses, especially through automated 3D radiation dose adjustment.
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Affiliation(s)
| | - Sebastian Ille
- Departments of1Neurosurgery and
- 2TUM Neuroimaging Center, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | | | | | - Sandro M Krieg
- Departments of1Neurosurgery and
- 2TUM Neuroimaging Center, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
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Boerner C, Schroeder A, Meyer B, Krieg SM, Ille S. Cortical Location of Language Function May Differ between Languages While White Matter Pathways Are Similar in Brain Lesion Patients. Brain Sci 2023; 13:1141. [PMID: 37626496 PMCID: PMC10452579 DOI: 10.3390/brainsci13081141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 07/21/2023] [Accepted: 07/26/2023] [Indexed: 08/27/2023] Open
Abstract
The neural representation of language can be identified cortically using navigated repetitive transcranial magnetic stimulation and subcortically using the fiber tracking of diffusion tensor imaging. We investigated how cortical locations of language and language-eloquent white matter pathways differ in 40 brain lesion patients speaking various languages. Error rates related to stimulations at single sites in the frontal and parietal lobe differed significantly between Balto-Slavic and Indo-European languages. Error rates related to stimulations at single sites in the temporal lobe differed significantly between bilingual individuals. No differences were found in the white matter language pathway volumes between Balto-Slavic and Indo-European languages nor between bilingual patients. These original and exploratory data indicate that the underlying subcortical structure might be similar across languages, with initially observed differences in the cortical location of language depending on the semantic processing, but these could not be confirmed using detailed statistical analyses pointing at a similar cortical and subcortical network.
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Affiliation(s)
- Corinna Boerner
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, School of Medicine, Technical University Munich, 81675 Munich, Germany
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Diehl CD, Giordano FA, Grosu AL, Ille S, Kahl KH, Onken J, Rieken S, Sarria GR, Shiban E, Wagner A, Beck J, Brehmer S, Ganslandt O, Hamed M, Meyer B, Münter M, Raabe A, Rohde V, Schaller K, Schilling D, Schneider M, Sperk E, Thomé C, Vajkoczy P, Vatter H, Combs SE. Opportunities and Alternatives of Modern Radiation Oncology and Surgery for the Management of Resectable Brain Metastases. Cancers (Basel) 2023; 15:3670. [PMID: 37509330 PMCID: PMC10377800 DOI: 10.3390/cancers15143670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Postsurgical radiotherapy (RT) has been early proven to prevent local tumor recurrence, initially performed with whole brain RT (WBRT). Subsequent to disadvantageous cognitive sequalae for the patient and the broad distribution of modern linear accelerators, focal irradiation of the tumor has omitted WBRT in most cases. In many studies, the effectiveness of local RT of the resection cavity, either as single-fraction stereotactic radiosurgery (SRS) or hypo-fractionated stereotactic RT (hFSRT), has been demonstrated to be effective and safe. However, whereas prospective high-level incidence is still lacking on which dose and fractionation scheme is the best choice for the patient, further ablative techniques have come into play. Neoadjuvant SRS (N-SRS) prior to resection combines straightforward target delineation with an accelerated post-surgical phase, allowing an earlier start of systemic treatment or rehabilitation as indicated. In addition, low-energy intraoperative RT (IORT) on the surgical bed has been introduced as another alternative to external beam RT, offering sterilization of the cavity surface with steep dose gradients towards the healthy brain. This consensus paper summarizes current local treatment strategies for resectable brain metastases regarding available data and patient-centered decision-making.
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Affiliation(s)
- Christian D Diehl
- Department of Radiation Oncology, Technical University of Munich (TUM), Klinikum rechts der Isar, 81675 München, Germany
- Institute of Radiation Medicine (IRM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partner Site Munich, 80336 München, Germany
| | - Frank A Giordano
- Department of Radiation Oncology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany
| | - Anca-L Grosu
- Department of Radiation Oncology, University Medical Center, Medical Faculty, 79106 Freiburg, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Faculty of Medicine, Technical University of Munich, 81675 München, Germany
| | - Klaus-Henning Kahl
- Department of Radiation Oncology, University Medical Center Augsburg, 86156 Augsburg, Germany
| | - Julia Onken
- Department of Neurosurgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, 10117 Berlin, Germany
- Berlin Institute of Health, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
- German Cancer Consortium (DKTK), Partner Site Berlin, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Stefan Rieken
- Department of Radiotherapy and Radiation Oncology, University Medical Center Göttingen, 37075 Göttingen, Germany
- Comprehensive Cancer Center Niedersachsen (CCC-N), 37075 Göttingen, Germany
| | - Gustavo R Sarria
- Department of Radiation Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Ehab Shiban
- Department of Neurosurgery, University Medical Center Augsburg, 86156 Augsburg, Germany
| | - Arthur Wagner
- Department of Neurosurgery, Faculty of Medicine, Technical University of Munich, 81675 München, Germany
| | - Jürgen Beck
- Department of Neurosurgery, University Hospital Freiburg, 79106 Freiburg, Germany
| | - Stefanie Brehmer
- Department of Neurosurgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany
| | - Oliver Ganslandt
- Neurosurgical Clinic, Klinikum Stuttgart, 70174 Stuttgart, Germany
| | - Motaz Hamed
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Faculty of Medicine, Technical University of Munich, 81675 München, Germany
| | - Marc Münter
- Department of Radiation Oncology, Klinikum Stuttgart Katharinenhospital, 70174 Stuttgart, Germany
| | - Andreas Raabe
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Veit Rohde
- Department of Neurosurgery, Universitätsmedizin Göttingen, 37075 Göttingen, Germany
| | - Karl Schaller
- Department of Neurosurgery, University of Geneva Medical Center & Faculty of Medicine, 1211 Geneva, Switzerland
| | - Daniela Schilling
- Department of Radiation Oncology, Technical University of Munich (TUM), Klinikum rechts der Isar, 81675 München, Germany
- Institute of Radiation Medicine (IRM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Matthias Schneider
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany
| | - Elena Sperk
- Mannheim Cancer Center, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany
| | - Claudius Thomé
- Department of Neurosurgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Peter Vajkoczy
- Department of Neurosurgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, 10117 Berlin, Germany
| | - Hartmut Vatter
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany
| | - Stephanie E Combs
- Department of Radiation Oncology, Technical University of Munich (TUM), Klinikum rechts der Isar, 81675 München, Germany
- Institute of Radiation Medicine (IRM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partner Site Munich, 80336 München, Germany
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Zhang W, Ille S, Schwendner M, Wiestler B, Meyer B, Krieg SM. The Impact of ioMRI on Glioblastoma Resection and Clinical Outcomes in a State-of-the-Art Neuro-Oncological Setup. Cancers (Basel) 2023; 15:3563. [PMID: 37509226 PMCID: PMC10377519 DOI: 10.3390/cancers15143563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/30/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
Intraoperative magnetic resonance imaging (ioMRI) aims to improve gross total resection (GTR) in glioblastoma (GBM) patients. Despite some older randomized data on safety and feasibility, ioMRI's actual impact in a modern neurosurgical setting utilizing a larger armamentarium of techniques has not been sufficiently investigated to date. We therefore aimed to analyze its effects on residual tumor, patient outcome, and progression-free survival (PFS) in GBM patients in a modern high-volume center. Patients undergoing ioMRI for resection of supratentorial GBM were enrolled between March 2018 and June 2020. ioMRI was performed in all cases at the end of resection when surgeons expected complete macroscopic tumor removal. Extent of resection (EOR) was performed by volumetric analysis, with GTR defined as an EOR ≥ 95%, respectively. Progression-free survival (PFS) was analyzed through univariate and multivariate Cox proportional regression analyses. In total, we enrolled 172 patients. Mean EOR increased from 93.9% to 98.3% (p < 0.0001) due to ioMRI, equaling an increase in GTR rates from 78.5% to 93.0% (p = 0.0002). Residual tumor volume decreased from 1.3 ± 4.2 cm3 to 0.6 ± 2.5 cm3 (p = 0.0037). Logistic regression revealed recurrent GBM as a risk factor leading to subtotal resection (STR) (odds ratio (OR) = 3.047, 95% confidence interval (CI) 1.165-7.974, p = 0.023). Additional resection after ioMRI led to equally long PFS compared to patients with complete tumor removal before ioMRI (hazard ratio (HR) = 0.898, 95%-CI 0.543-1.483, p = 0.67). ioMRI considerably reduces residual tumor volume and helps to achieve comparable PFS, even in patients with unexpected residual tumor after initial resection before ioMRI.
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Affiliation(s)
- Wei Zhang
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Maximilian Schwendner
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Benedikt Wiestler
- Department of Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
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Zhang H, Tehlan K, Ille S, Schwendner M, Gong Z, Schroeder A, Meyer B, Krieg SM. Interhemispheric connections in the maintenance of language performance and prognosis prediction: fully connected layer-based deep learning model analysis. Neurosurg Focus 2023; 54:E6. [PMID: 37283401 DOI: 10.3171/2023.3.focus2363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/21/2023] [Indexed: 06/08/2023]
Abstract
OBJECTIVE Language-related networks have been recognized in functional maintenance, which has also been considered the mechanism of plasticity and reorganization in patients with cerebral malignant tumors. However, the role of interhemispheric connections (ICs) in language restoration remains unclear at the network level. Navigated transcranial magnetic stimulation (nTMS) and diffusion tensor imaging fiber tracking data were used to identify language-eloquent regions and their corresponding subcortical structures, respectively. METHODS Preoperative image-based IC networks and nTMS mapping data from 30 patients without preoperative and postoperative aphasia as the nonaphasia group, 30 patients with preoperative and postoperative aphasia as the glioma-induced aphasia (GIA) group, and 30 patients without preoperative aphasia but who developed aphasia after the operation as the surgery-related aphasia group were investigated using fully connected layer-based deep learning (FC-DL) analysis to weight ICs. RESULTS GIA patients had more weighted ICs than the patients in the other groups. Weighted ICs between the left precuneus and right paracentral lobule, and between the left and right cuneus, were significantly different among these three groups. The FC-DL approach for modeling functional and structural connectivity was also tested for its potential to predict postoperative language levels, and both the achieved sensitivity and specificity were greater than 70%. Weighted IC was reorganized more in GIA patients to compensate for language loss. CONCLUSIONS The authors' method offers a new perspective to investigate brain structural organization and predict functional prognosis.
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Baumgart L, Wagner A, Dorier AS, Droese D, Aftahy AK, Wostrack M, Ille S, Meyer B, Krieg SM. Predictive value of IOM in clipping of unruptured intracranial aneurysms - A prospective study from the surgeon's point of view. Brain Spine 2023; 3:101759. [PMID: 37383469 PMCID: PMC10293320 DOI: 10.1016/j.bas.2023.101759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 06/30/2023]
Abstract
Introduction Intraoperative neuromonitoring (IOM) of motor/somatosensory evoked potentials is a well-established approach for reducing ischemic complications after aneurysm clipping. Research question To determine the predictive validity of IOM for postoperative functional outcome and its perceived added value for intraoperative real-time feedback of functional impairment in the surgical treatment of unruptured intracranial aneurysms (UIAs). Material and methods Prospective study of patients scheduled for elective clipping of UIAs between 02/2019-02/2021. Transcranial motor evoked potentials (tcMEP) were used in all cases, a significant decline was defined as loss of ≥50% in amplitude or 50% latency increase. Clinical data were correlated to postoperative deficits. A surgeon's questionnaire was conceived. Results 47 patients were included, median age 57 years (range 26-76). IOM was successful in all cases. In 87.2%, IOM was stable throughout surgery, although 1 patient (2.4%) demonstrated a permanent postoperative neurological deficit. All patients with an intraoperatively reversible tcMEP-decline (12.7%) showed no surgery-related deficit, regardless of the decline duration (range 0.5-40.0 min; mean: 13.8). Temporary clipping (TC) was performed in 12 cases (25.5%), with a decline in amplitude in 4 patients. After clip-removal, all amplitudes returned to baseline. IOM provided the surgeon with a higher sense of security in 63.8%. Discussion and conclusion IOM remains invaluable during elective microsurgical clipping, particularly during TC of MCA and AcomA-aneurysms. It alerts the surgeon of impending ischemic injury and offers a way of maximizing the time frame for TC. IOM has highly increased surgeons' subjective feeling of security during the procedure.
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Affiliation(s)
- Lea Baumgart
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Arthur Wagner
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Anne-Sophie Dorier
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Doris Droese
- Department of Anaesthesiology, Technical University Munich School of Medicine, Munich, Germany
| | - Amir K. Aftahy
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Maria Wostrack
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
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Schwendner M, Liang R, Butenschön VM, Meyer B, Ille S, Krieg SM. The one-stop-shop approach: Navigating lumbar 360-degree instrumentation in a single position. Front Surg 2023; 10:1152316. [PMID: 37009623 PMCID: PMC10060549 DOI: 10.3389/fsurg.2023.1152316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
ObjectiveTreatment strategies of patients suffering from pyogenic spondylodiscitis are a controverse topic. Percutaneous dorsal instrumentation followed by surgical debridement and fusion of the infectious vertebral disc spaces is a common approach for surgical treatment. Technical advances enable spinal navigation for dorsal and lateral instrumentation. This report investigates combined navigated dorsal and lateral instrumentation in a single surgery and positioning for lumbar spondylodiscitis in a pilot series.MethodsPatients diagnosed with 1- or 2-level discitis were prospectively enrolled. To enable posterior navigated pedicle screw placement and lateral interbody fusion (LLIF) patients were positioned semi-prone in 45-degree fashion. For spinal referencing, a registration array was attached to the pelvic or spinal process. 3D scans were acquired intraoperatively for registration and implant control.Results27 patients suffering from 1- or 2-level spondylodiscitis with a median ASA of 3 (1–4) and a mean BMI of 27.9 ± 4.9 kg/m2 were included. Mean duration of surgery was 146 ± 49 min. Mean blood loss was 367 ± 307 ml. A median of 4 (4–8) pedicle screws were placed for dorsal percutaneous instrumentation with an intraoperative revision rate of 4.0%. LLIF was performed on 31 levels with an intraoperative cage revision rate of 9.7%.ConclusionsNavigated lumbar dorsal and lateral instrumentation in a single operation and positioning is feasible and safe. It enables rapid 360-degree instrumentation in these critically ill patients and potentially reduces overall intraoperative radiation exposure for patient and staff. Compared to purely dorsal approaches it allows for optimal discectomy and fusion while overall incisions and wound size are minimized. Compared to prone LLIF procedures, semi-prone in 45-degree positioning allows for a steep learning curve due to minor changes of familiar anatomy.
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Affiliation(s)
- Maximilian Schwendner
- Department of Neurosurgery, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
- TUM Neuroimaging Center, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| | - Raimunde Liang
- Department of Neurosurgery, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| | - Vicki M. Butenschön
- Department of Neurosurgery, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
- TUM Neuroimaging Center, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
- TUM Neuroimaging Center, School of Medicine, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
- Correspondence: Sandro M. Krieg
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21
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Diehl CD, Rosenkranz E, Schwendner M, Mißlbeck M, Sollmann N, Ille S, Meyer B, Combs SE, Krieg SM. Dose Reduction to Motor Structures in Adjuvant Fractionated Stereotactic Radiotherapy of Brain Metastases: nTMS-Derived DTI-Based Motor Fiber Tracking in Treatment Planning. Cancers (Basel) 2022; 15:cancers15010282. [PMID: 36612277 PMCID: PMC9818359 DOI: 10.3390/cancers15010282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/07/2022] [Accepted: 12/19/2022] [Indexed: 01/03/2023] Open
Abstract
Background: Resection of brain metastases (BM) close to motor structures is challenging for treatment. Navigated transcranial magnetic stimulation (nTMS) motor mapping, combined with diffusion tensor imaging (DTI)-based fiber tracking (DTI-FTmot.TMS), is a valuable tool in neurosurgery to preserve motor function. This study aimed to assess the practicability of DTI-FTmot.TMS for local adjuvant radiotherapy (RT) planning of BM. Methods: Presurgically generated DTI-FTmot.TMS-based corticospinal tract (CST) reconstructions (FTmot.TMS) of 24 patients with 25 BM resected during later surgery were incorporated into the RT planning system. Completed fractionated stereotactic intensity-modulated RT (IMRT) plans were retrospectively analyzed and adapted to preserve FTmot.TMS. Results: In regular plans, mean dose (Dmean) of complete FTmot.TMS was 5.2 ± 2.4 Gy. Regarding planning risk volume (PRV-FTTMS) portions outside of the planning target volume (PTV) within the 17.5 Gy (50%) isodose line, the DTI-FTmot.TMS Dmean was significantly reduced by 33.0% (range, 5.9−57.6%) from 23.4 ± 3.3 Gy to 15.9 ± 4.7 Gy (p < 0.001). There was no significant decline in the effective treatment dose, with PTV Dmean 35.6 ± 0.9 Gy vs. 36.0 ± 1.2 Gy (p = 0.063) after adaption. Conclusions: The DTI-FTmot.TMS-based CST reconstructions could be implemented in adjuvant IMRT planning of BM. A significant dose reduction regarding motor structures within critical dose levels seems possible.
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Affiliation(s)
- Christian D. Diehl
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
- Institute of Radiation Medicine (IRM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Deutsches Konsortium für Translationale Krebsforschung (DKTK), DKTK Partner Site, 81675 Munich, Germany
- Correspondence:
| | - Enrike Rosenkranz
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Maximilian Schwendner
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Martin Mißlbeck
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Nico Sollmann
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, 89081 Ulm, Germany
| | - Sebastian Ille
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Stephanie E. Combs
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
- Institute of Radiation Medicine (IRM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Deutsches Konsortium für Translationale Krebsforschung (DKTK), DKTK Partner Site, 81675 Munich, Germany
| | - Sandro M. Krieg
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
- TUM-Neuroimaging Center, Klinikum rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
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Krieg SM, Bernhard D, Ille S, Meyer B, Combs S, Rotenberg A, Frühwald MC. Neurosurgery for eloquent lesions in children: state-of-the-art rationale and technical implications of perioperative neurophysiology. Neurosurg Focus 2022; 53:E4. [PMID: 36455267 DOI: 10.3171/2022.9.focus22316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 09/22/2022] [Indexed: 12/04/2022]
Abstract
OBJECTIVE In adult patients, an increasing group of neurosurgeons specialize entirely in the treatment of highly eloquent tumors, particularly gliomas. In contrast, extensive perioperative neurophysiological workup for pediatric cases has been limited essentially to epilepsy surgery. METHODS The authors discuss radio-oncological and general oncological considerations based on the current literature and their personal experience. RESULTS While several functional mapping modalities facilitate preoperative identification of cortically and subcortically located eloquent areas, not all are suited for children. Direct cortical intraoperative stimulation is impractical in many young patients due to the reduced excitability of the immature cortex. Behavioral requirements also limit the utility of functional MRI and magnetoencephalography in children. In contrast, MRI-derived tractography and navigated transcranial magnetic stimulation are available across ages. Herein, the authors review the oncological rationale of function-guided resection in pediatric gliomas including technical implications such as personalized perioperative neurophysiology, surgical strategies, and limitations. CONCLUSIONS Taken together, these techniques, despite the limitations of some, facilitate the identification of eloquent areas prior to tumor surgery and radiotherapy as well as during follow-up of residual tumors.
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Affiliation(s)
- Sandro M Krieg
- 1Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München
| | - Denise Bernhard
- 2Department of Radiation Oncology, Klinikum rechts der Isar, School of Medicine, Technische Universität München
| | - Sebastian Ille
- 1Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München
| | - Bernhard Meyer
- 1Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München
| | - Stephanie Combs
- 2Department of Radiation Oncology, Klinikum rechts der Isar, School of Medicine, Technische Universität München.,3Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partner Sites Munich.,4Institute of Radiation Medicine (IRM), Department of Radiation Sciences (DRS), Helmholtz Zentrum München (HMGU), Oberschleißheim, Germany
| | - Alexander Rotenberg
- 5Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; and
| | - Michael C Frühwald
- 6Pediatrics and Adolescent Medicine, Augsburg University Hospital, Augsburg, Germany
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Diehl C, Rosenkranz E, Mißlbeck M, Schwendner M, Sollmann N, Eitz K, Bernhardt D, Ille S, Meyer B, Combs S, Krieg S. RADT-06. SPARING OF MOTOR STRUCTURES IN ADJUVANT RADIATION THERAPY AFTER RESECTION OF BRAIN METASTASES: APPLICATION OF NTMS-DERIVED DTI-BASED MOTOR FIBER TRACKING IN ADJUVANT STEREOTACTIC RT TREATMENT PLANNING. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac209.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
BACKGROUND
Resection of brain metastases (BM) close to the motor cortex and the corticospinal tract (CST) bears a significant risk for treatment-related morbidity. Navigated transcranial mapping (nTMS) combined with diffusion-tensor-imaging (DTI) based fiber tracking (DTI-FTTMS) is a valuable tool to guide the neurosurgeon along the CST to preserve motor function. This study aims to proof the practicability of DTI-FTTMS in local adjuvant stereotactic RT planning in the management of BM. Method: Pre-surgical generated DTI-FTTMS-based CST reconstructions of 24 patients with 25 resected BM were incorporated into the RT planning system and elastic fused with planning imaging. The CST was delineated as the planning risk volume (PRV-FTTMS). Fractionated stereotactic intensity-modulated RT (IMRT) plans (7 x 5 Gy) were retrospectively calculated and then optimized to preserve PRV-FTTMS. Areas covered by the planning target volume (PTV) were not spared (overlap).
RESULTS
In regular plans mean dose (Dmean) of complete PRV-FTTMS was 5.4 ± 2.5 Gy. Regarding PRV-FTTMS portions within the 8.75 Gy (25% of prescription dose) isodose level Dmean was 18.2 ± 4.3 Gy and after plan optimization 13.1 ± 3.8Gy (-28.0%, p < 0.001). Within the 17.5 Gy (50%) isodose line PRV-FTTMS Dmean was reduced by 31.7% from 24.3 ± 3 Gy to 16.6 ± 4.8 Gy (p< 0.001). There was no decline of the effective treatment dose, PTV Dmean in regular plans was 36.9 ± 0.7 Gy vs. 37.7 ± 1.4Gy (p=0.013) after adaption. PTV coverage (V35Gy(%)*100) did not change with plan optimization: 0.99 vs. 0.99 (p=0.43). Dose constraints of organs at risk were all met both in regular and optimized plans.
CONCLUSION
DTI-FTTMS based motor tracts could be implemented in the adjuvant stereotactic RT planning of cavities after resection of BM. A significant dose reduction of motor structures within critical dose levels seems possible without reducing PTV treatment dose. However, the functional benefit needs to be investigated prospectively within clinical trials.
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Affiliation(s)
- Christian Diehl
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | | | - Martin Mißlbeck
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Maximilian Schwendner
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Nico Sollmann
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Kerstin Eitz
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Denise Bernhardt
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Sebastian Ille
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Bernhard Meyer
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
| | - Stephanie Combs
- Department of Radiation Oncology, Klinikum rechts der Isar, Technical University of Munich (TUM) , Munich , Germany
| | - Sandro Krieg
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich (TUM) , 81675 Munich , Germany
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Zhang W, Ille S, Schwendner M, Wiestler B, Meyer B, Krieg SM. Tracking motor and language eloquent white matter pathways with intraoperative fiber tracking versus preoperative tractography adjusted by intraoperative MRI-based elastic fusion. J Neurosurg 2022; 137:1114-1123. [PMID: 35213839 DOI: 10.3171/2021.12.jns212106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 12/09/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Preoperative fiber tracking (FT) enables visualization of white matter pathways. However, the intraoperative accuracy of preoperative image registration is reduced due to brain shift. Intraoperative FT is currently considered the standard of anatomical accuracy, while intraoperative imaging can also be used to correct and update preoperative data by intraoperative MRI (ioMRI)-based elastic fusion (IBEF). However, the use of intraoperative tractography is restricted due to the need for additional acquisition of diffusion imaging in addition to scanner limitations, quality factors, and setup time. Since IBEF enables compensation for brain shift and updating of preoperative FT, the aim of this study was to compare intraoperative FT with IBEF of preoperative FT. METHODS Preoperative MRI (pMRI) and ioMRI, both including diffusion tensor imaging (DTI) data, were acquired between February and November 2018. Anatomy-based DTI FT of the corticospinal tract (CST) and the arcuate fascicle (AF) was reconstructed at various fractional anisotropy (FA) values on pMRI and ioMRI, respectively. The intraoperative DTI FT, as a baseline tractography, was fused with original preoperative FT and IBEF-compensated FT, processes referred to as rigid fusion (RF) and elastic fusion (EF), respectively. The spatial overlap index (Dice coefficient [DICE]) and distances of surface points (average surface distance [ASD]) of fused FT before and after IBEF were analyzed and compared in operated and nonoperated hemispheres. RESULTS Seventeen patients with supratentorial brain tumors were analyzed. On the operated hemisphere, the overlap index of pre- and intraoperative FT of the CST by DICE significantly increased by 0.09 maximally after IBEF. A significant decrease by 0.5 mm maximally in the fused FT presented by ASD was observed. Similar improvements were found in IBEF-compensated FT, for which AF tractography on the tumor hemispheres increased by 0.03 maximally in DICE and decreased by 1.0 mm in ASD. CONCLUSIONS Preoperative tractography after IBEF is comparable to intraoperative tractography and can be a reliable alternative to intraoperative FT.
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Affiliation(s)
| | | | | | - Benedikt Wiestler
- 2Diagnostic and Interventional Neuroradiology, Technical University of Munich School of Medicine, Munich, Germany
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25
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Ille S, Zhang H, Sogerer L, Schwendner M, Schöder A, Meyer B, Wiestler B, Krieg SM. Preoperative function-specific connectome analysis predicts surgery-related aphasia after glioma resection. Hum Brain Mapp 2022; 43:5408-5420. [PMID: 35851513 PMCID: PMC9704785 DOI: 10.1002/hbm.26014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 05/30/2022] [Accepted: 06/22/2022] [Indexed: 01/15/2023] Open
Abstract
Glioma resection within language-eloquent regions poses a high risk of surgery-related aphasia (SRA). Preoperative functional mapping by navigated transcranial magnetic stimulation (nTMS) combined with diffusion tensor imaging (DTI) is increasingly used to localize cortical and subcortical language-eloquent areas. This study enrolled 60 nonaphasic patients with left hemispheric perisylvian gliomas to investigate the prediction of SRA based on function-specific connectome network properties under different fractional anisotropy (FA) thresholds. Moreover, we applied a machine learning model for training and cross-validation to predict SRA based on preoperative connectome parameters. Preoperative connectome analysis helps predict SRA development with an accuracy of 73.3% and sensitivity of 78.3%. The current study provides a new perspective of combining nTMS and function-specific connectome analysis applied in a machine learning model to investigate language in neurooncological patients and promises to advance our understanding of the intricate networks.
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Affiliation(s)
- Sebastian Ille
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany,TUM‐Neuroimaging CenterTechnical University of MunichMunichGermany
| | - Haosu Zhang
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany
| | - Lisa Sogerer
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany
| | - Maximilian Schwendner
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany
| | - Axel Schöder
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany
| | - Bernhard Meyer
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany
| | - Benedikt Wiestler
- Department of Diagnostic and Interventional NeuroradiologyKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany
| | - Sandro M. Krieg
- Department of NeurosurgeryKlinikum rechts der Isar, School of Medicine, Technical University of MunichMunichGermany,TUM‐Neuroimaging CenterTechnical University of MunichMunichGermany
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Diehl C, Rosenkranz E, Mißlbeck M, Schwendner M, Sollmann N, Ille S, Meyer B, Combs S, Bernhardt D, Krieg S. nTMS-derived DTI-based motor fiber tracking in radiotherapy treatment planning of high-grade gliomas for avoidance of motor structures. Radiother Oncol 2022; 171:189-197. [DOI: 10.1016/j.radonc.2022.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/08/2022] [Accepted: 04/10/2022] [Indexed: 10/18/2022]
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Zhang H, Ille S, Sogerer L, Schwendner M, Schröder A, Meyer B, Wiestler B, Krieg SM. Cover Image. Hum Brain Mapp 2022. [DOI: 10.1002/hbm.25491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Ohlerth AK, Bastiaanse R, Nickels L, Neu B, Zhang W, Ille S, Sollmann N, Krieg SM. Dual-Task nTMS Mapping to Visualize the Cortico-Subcortical Language Network and Capture Postoperative Outcome-A Patient Series in Neurosurgery. Front Oncol 2022; 11:788122. [PMID: 35127493 PMCID: PMC8814635 DOI: 10.3389/fonc.2021.788122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 12/13/2021] [Indexed: 11/16/2022] Open
Abstract
Background Perioperative assessment of language function in brain tumor patients commonly relies on administration of object naming during stimulation mapping. Ample research, however, points to the benefit of adding verb tasks to the testing paradigm in order to delineate and preserve postoperative language function more comprehensively. This research uses a case series approach to explore the feasibility and added value of a dual-task protocol that includes both a noun task (object naming) and a verb task (action naming) in perioperative delineation of language functions. Materials and Methods Seven neurosurgical cases underwent perioperative language assessment with both object and action naming. This entailed preoperative baseline testing, preoperative stimulation mapping with navigated Transcranial Magnetic Stimulation (nTMS) with subsequent white matter visualization, intraoperative mapping with Direct Electrical Stimulation (DES) in 4 cases, and postoperative imaging and examination of language change. Results We observed a divergent pattern of language organization and decline between cases who showed lesions close to the delineated language network and hence underwent DES mapping, and those that did not. The latter displayed no new impairment postoperatively consistent with an unharmed network for the neural circuits of both object and action naming. For the cases who underwent DES, on the other hand, a higher sensitivity was found for action naming over object naming. Firstly, action naming preferentially predicted the overall language state compared to aphasia batteries. Secondly, it more accurately predicted intraoperative positive language areas as revealed by DES. Thirdly, double dissociations between postoperatively unimpaired object naming and impaired action naming and vice versa indicate segregated skills and neural representation for noun versus verb processing, especially in the ventral stream. Overlaying postoperative imaging with object and action naming networks revealed that dual-task nTMS mapping can explain the drop in performance in those cases where the network appeared in proximity to the resection cavity. Conclusion Using a dual-task protocol for visualization of cortical and subcortical language areas through nTMS mapping proved to be able to capture network-to-deficit relations in our case series. Ultimately, adding action naming to clinical nTMS and DES mapping may help prevent postoperative deficits of this seemingly segregated skill.
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Affiliation(s)
- Ann-Katrin Ohlerth
- Center for Language and Cognition Groningen, Groningen, Netherlands.,International Doctorate in Experimental Approaches to Language and Brain (IDEALAB, Universities of Groningen, Potsdam, Newcastle, and Macquarie University), Sydney, NSW, Australia
| | - Roelien Bastiaanse
- Center for Language and Brain, Higher School of Economics, National Research University, Moscow, Russia
| | - Lyndsey Nickels
- School of Psychological Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW, Australia
| | - Beate Neu
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Wei Zhang
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Nico Sollmann
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany.,Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,TUM-Neuroimaging Center, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,TUM-Neuroimaging Center, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
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Ille S, Schoen S, Wiestler B, Meyer B, Krieg SM. Subcortical motor ischemia can be detected by intraoperative MRI within 1 h – A feasibility study. Brain and Spine 2022; 2:100862. [PMID: 36248167 PMCID: PMC9560708 DOI: 10.1016/j.bas.2022.100862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 01/07/2022] [Accepted: 01/16/2022] [Indexed: 10/26/2022]
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Zhang H, Ille S, Sogerer L, Schwendner M, Schröder A, Meyer B, Wiestler B, Krieg SM. Elucidating the structural-functional connectome of language in glioma-induced aphasia using nTMS and DTI. Hum Brain Mapp 2021; 43:1836-1849. [PMID: 34951084 PMCID: PMC8933329 DOI: 10.1002/hbm.25757] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 12/01/2021] [Accepted: 12/01/2021] [Indexed: 12/24/2022] Open
Abstract
Glioma‐induced aphasia (GIA) is frequently observed in patients with newly diagnosed gliomas. Previous studies showed an impact of gliomas not only on local brain regions but also on the functionality and structure of brain networks. The current study used navigated transcranial magnetic stimulation (nTMS) to localize language‐related regions and to explore language function at the network level in combination with connectome analysis. Thirty glioma patients without aphasia (NA) and 30 patients with GIA were prospectively enrolled. Tumors were located in the vicinity of arcuate fasciculus‐related cortical and subcortical regions. The visualized ratio (VR) of each tract was calculated based on their respective fractional anisotropy (FA) and maximal FA. Using a thresholding method of each tract at 25% VR and 50% VR, DTI‐based tractography was performed to construct structural brain networks for graph‐based connectome analysis, containing functional data acquired by nTMS. The average degree of left hemispheric networks (Mleft) was higher in the NA group than in the GIA group for both VR thresholds. Differences of global and local efficiency between 25% and 50% VR thresholds were significantly lower in the NA group than in the GIA group. Aphasia levels correlated with connectome properties in Mleft and networks based on positive nTMS mapping regions (Mpos). A more substantial relation to language performance was found in Mpos and Mleft compared to the network of negative mapping regions (Mneg). Gliomas causing deterioration of language are related to various cerebral networks. In NA patients, mainly Mneg was impacted, while Mpos was impacted in GIA patients.
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Affiliation(s)
- Haosu Zhang
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany.,TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany
| | - Lisa Sogerer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany
| | - Maximilian Schwendner
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany
| | - Axel Schröder
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany
| | - Benedikt Wiestler
- School of Medicine, Technical University of Munich, Munich, Germany.,Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,Center for Translational Cancer Research of the TUM (TranslaTUM), Technical University of Munich, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,School of Medicine, Technical University of Munich, Munich, Germany.,TUM-Neuroimaging Center, Technical University of Munich, Munich, Germany
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Ille S, Schroeder A, Hostettler IC, Wostrack M, Meyer B, Krieg SM. Impacting the Treatment of Highly Eloquent Supratentorial Cerebral Cavernous Malformations by Noninvasive Functional Mapping-An Observational Cohort Study. Oper Neurosurg (Hagerstown) 2021; 21:467-477. [PMID: 34624894 DOI: 10.1093/ons/opab318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 07/18/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Cerebral cavernous malformations (CCM) may cause cavernoma-related epilepsy (CRE) and intracranial hemorrhage (ICH). Functional mapping has shown its usefulness during the resection of eloquent lesions including the treatment of brain arteriovenous malformations. OBJECTIVE To evaluate the impact of noninvasive functional mapping on decision-making and resection of eloquently located CCM. METHODS Of 126 patients with intracranial cavernomas, we prospectively included 40 consecutive patients (31.7%) with highly eloquent CCM between 2012 and 2020. We performed functional mapping via navigated transcranial magnetic stimulation (nTMS) motor mapping in 30 cases and nTMS language mapping in 20 cases. Twenty patients suffered from CRE. CCM caused ICH in 18 cases. RESULTS We used functional mapping data including function-based tractography in all cases. Indication toward (31 cases) or against (9 cases) CCM resection was influenced by noninvasive functional mapping in 36 cases (90%). We resected CCMs in 24 cases, and 7 patients refused the recommendation for surgery. In 19 and 4 cases, we used additional intraoperative neuromonitoring and awake craniotomy, respectively. Patients suffered from transient postoperative motor or language deficits in 2 and 2 cases, respectively. No patient suffered from permanent deficits. After 1 yr of follow-up, anti-epileptic drugs could be discontinued in all patients who underwent surgery but 1 patient. CONCLUSION Surgery-related deficit rates are low even for highly eloquent CCM and seizure outcome is excellent. The present results show that noninvasive functional mapping and function-based tractography is a useful tool for the decision-making process and during microsurgical resection of eloquently located CCM.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Isabel C Hostettler
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Maria Wostrack
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
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Ntemou E, Ohlerth AK, Ille S, Krieg SM, Bastiaanse R, Rofes A. Mapping Verb Retrieval With nTMS: The Role of Transitivity. Front Hum Neurosci 2021; 15:719461. [PMID: 34539364 PMCID: PMC8442843 DOI: 10.3389/fnhum.2021.719461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 07/31/2021] [Indexed: 11/25/2022] Open
Abstract
Navigated Transcranial Magnetic Stimulation (nTMS) is used to understand the cortical organization of language in preparation for the surgical removal of a brain tumor. Action naming with finite verbs can be employed for that purpose, providing additional information to object naming. However, little research has focused on the properties of the verbs that are used in action naming tasks, such as their status as transitive (taking an object; e.g., to read) or intransitive (not taking an object; e.g., to wink). Previous neuroimaging data show higher activation for transitive compared to intransitive verbs in posterior perisylvian regions bilaterally. In the present study, we employed nTMS and production of finite verbs to investigate the cortical underpinnings of transitivity. Twenty neurologically healthy native speakers of German participated in the study. They underwent language mapping in both hemispheres with nTMS. The action naming task with finite verbs consisted of transitive (e.g., The man reads the book) and intransitive verbs (e.g., The woman winks) and was controlled for relevant psycholinguistic variables. Errors were classified in four different error categories (i.e., non-linguistic errors, grammatical errors, lexico-semantic errors and, errors at the sound level) and were analyzed quantitatively. We found more nTMS-positive points in the left hemisphere, particularly in the left parietal lobe for the production of transitive compared to intransitive verbs. These positive points most commonly corresponded to lexico-semantic errors. Our findings are in line with previous aphasia and neuroimaging studies, suggesting that a more widespread network is used for the production of verbs with a larger number of arguments (i.e., transitives). The higher number of lexico-semantic errors with transitive compared to intransitive verbs in the left parietal lobe supports previous claims for the role of left posterior areas in the retrieval of argument structure information.
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Affiliation(s)
- Effrosyni Ntemou
- International Doctorate in Experimental Approaches to Language and Brain (IDEALAB, Universities of Groningen, Potsdam, Newcastle, Trento and Macquarie University), Sydney, NSW, Australia.,Centre for Language and Cognition Groningen (CLCG), University of Groningen, Groningen, Netherlands
| | - Ann-Katrin Ohlerth
- International Doctorate in Experimental Approaches to Language and Brain (IDEALAB, Universities of Groningen, Potsdam, Newcastle, Trento and Macquarie University), Sydney, NSW, Australia.,Centre for Language and Cognition Groningen (CLCG), University of Groningen, Groningen, Netherlands
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum Rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Klinikum Rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Roelien Bastiaanse
- Center for Language and Brain, National Research University Higher School of Economics, Moscow, Russia
| | - Adrià Rofes
- Centre for Language and Cognition Groningen (CLCG), University of Groningen, Groningen, Netherlands
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Ille S, Baumgart L, Obermueller T, Meyer B, Krieg SM. Clinical efficiency of operating room-based sliding gantry CT as compared to mobile cone-beam CT-based navigated pedicle screw placement in 853 patients and 6733 screws. Eur Spine J 2021; 30:3720-3730. [PMID: 34519911 DOI: 10.1007/s00586-021-06981-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/30/2021] [Accepted: 08/24/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE Multiple solutions for navigation-guided pedicle screw placement are available. However, the efficiency with regard to clinical and resource implications has not yet been analyzed. The present study's aim was to analyze whether an operating room sliding gantry CT (ORCT)-based approach for spinal instrumentation is more efficient than a mobile cone-beam CT (CBCT)-based approach. METHODS This cohort study included a random sample of 853 patients who underwent spinal instrumentation using ORCT-based or CBCT-based pedicle screw placement due to tumor, degenerative, trauma, infection, or deformity disorders between November 2015 and January 2020. RESULTS More screws had to be revised intraoperatively in the CBCT group due to insufficient placement (ORCT: 98, 2.8% vs. CBCT: 128, 4.0%; p = 0.0081). The mean time of patients inside the OR (Interval 5 Entry-Exit) was significantly shorter for the ORCT group (ORCT: mean, [95% CI] 256.0, [247.8, 264.3] min, CBCT: 283.0, [274.4, 291.5] min; p < 0.0001) based on shorter times for Interval 2 Positioning-Incision (ORCT: 18.8, [18.1, 19.9] min, CBCT: 33.6, [32.2, 35.5] min; p < 0.0001) and Interval 4 Suture-Exit (ORCT: 24.3, [23.6, 26.1] min, CBCT: 29.3, [27.5, 30.7] min; p < 0.0001). CONCLUSIONS The choice of imaging technology for navigated pedicle screw placement has significant impact on standard spine procedures even in a high-volume spine center with daily routine in such devices. Particularly with regard to the duration of surgeries, the shorter time needed for preparation and de-positioning in the ORCT group made the main difference, while the accuracy was even higher for the ORCT.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany; School of Medicine, Ismaninger Str. 22, 81675, Munich, Germany.,TUM Neuroimaging Center, Technical University of Munich, Germany, Ismaninger Str. 22, 81675 , Munich, Germany
| | - Lea Baumgart
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany; School of Medicine, Ismaninger Str. 22, 81675, Munich, Germany
| | - Thomas Obermueller
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany; School of Medicine, Ismaninger Str. 22, 81675, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany; School of Medicine, Ismaninger Str. 22, 81675, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Germany; School of Medicine, Ismaninger Str. 22, 81675, Munich, Germany. .,TUM Neuroimaging Center, Technical University of Munich, Germany, Ismaninger Str. 22, 81675 , Munich, Germany.
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Hartung SL, Mandonnet E, de Witt Hamer P, Klein M, Wager M, Rech F, Pallud J, Pessanha Viegas C, Ille S, Krieg SM, Robe PA, van Zandvoort MJE. Impaired Set-Shifting from Dorsal Stream Disconnection: Insights from a European Series of Right Parietal Lower-Grade Glioma Resection. Cancers (Basel) 2021; 13:cancers13133337. [PMID: 34283043 PMCID: PMC8267741 DOI: 10.3390/cancers13133337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/18/2021] [Accepted: 06/24/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Awake surgery with cognitive monitoring has increasingly been implemented to preserve brain networks and functionality. More recently, not only surgery in the left but also in the right hemisphere, i.c., the parietal lobe, was associated with potential risk for deficits in cognitive functions, such as cognitive flexibility. We describe an explorative pilot study in an international consortium within clinical care as usual. Careful interpretation of our findings indicates that disconnection of the lateral part of the dorsal stream correlated with impaired set-shifting. More importantly, it illustrates the need for international collaboration on neuropsychological tests and methodologies to improve our understanding of white matter networks at risk during awake surgery. Abstract Awake surgery with cognitive monitoring has increasingly been implemented to preserve brain networks and functionality. More recently, not only surgery in the left but also in the right hemisphere, i.c., the parietal lobe, was associated with potential risk for deficits in cognitive functions, such as cognitive flexibility. In this explorative pilot study, we compare cognitive performance more than three months after surgery with baseline measurements and explore the association between cognitive decline and subcortical tracts that may have been severed during surgery in the right hemisphere. Twenty-two patients who underwent surgery for a right parietal low-grade glioma were assessed pre- and postoperatively using the Trail Making Test and the Stroop task to administer set-shifting abilities and inhibition. Volume measurements and lesion–symptom mapping analyses were performed on postoperative MRI scans. Careful interpretation of the results shows a change in TMT performance and not on the Stroop Task when the lateral part of the arcuate fasciculus is damaged, indicating that disconnection of the lateral part of the dorsal stream might be correlated specifically with impaired set-shifting and not with inhibition. More importantly, this study underlines the need for international concertation to allow larger studies to increase power and perform more detailed analyses.
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Affiliation(s)
- Suzanne L. Hartung
- Department of Neurology and Neurosurgery, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (P.A.R.); (M.J.E.v.Z.)
- Correspondence:
| | | | - Philip de Witt Hamer
- Department of Neurosurgery, Location VUmc, Cancer Center Amsterdam, Amsterdam UMC, 1081 HV Amsterdam, The Netherlands;
| | - Martin Klein
- Department of Medical Psychology and Brain Tumor Center Amsterdam at Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands;
| | - Michel Wager
- Department of Neurological Surgery, Poitiers University Hospital, 86021 Poitiers, France;
| | - Fabien Rech
- CHRU-Nancy, Service de Neurochirurgie, Université de Lorraine, F-54000 Nancy, France;
- CNRS, CRAN, Université de Lorraine, F-54000 Nancy, France
| | - Johan Pallud
- Department of Neursurgery, Saint-Anne Hospital, 75014 Paris, France;
| | | | - Sebastian Ille
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University Munich, 80333 Munich, Germany; (S.I.); (S.M.K.)
| | - Sandro M. Krieg
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University Munich, 80333 Munich, Germany; (S.I.); (S.M.K.)
| | - Pierre A. Robe
- Department of Neurology and Neurosurgery, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (P.A.R.); (M.J.E.v.Z.)
| | - Martine J. E. van Zandvoort
- Department of Neurology and Neurosurgery, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (P.A.R.); (M.J.E.v.Z.)
- Department of Experimental Psychology, Utrecht University, 3584 CS Utrecht, The Netherlands
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Ille S, Schwendner M, Zhang W, Schroeder A, Meyer B, Krieg SM. Tractography for Subcortical Resection of Gliomas Is Highly Accurate for Motor and Language Function: ioMRI-Based Elastic Fusion Disproves the Severity of Brain Shift. Cancers (Basel) 2021; 13:cancers13081787. [PMID: 33918598 PMCID: PMC8068819 DOI: 10.3390/cancers13081787] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/29/2021] [Accepted: 04/04/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Tractography enables the visualization of eloquent white matter pathways. Inaccuracies due to brain shift might occur intraoperatively. The aim of this study was to evaluate the impact of intraoperative magnetic resonance imaging (MRI)-based elastic fusion on preoperative tractography for subcortical resection of gliomas. We confirmed the high accuracy of tractography during the whole course of surgery. Abstract When using preoperative tractography intraoperatively, inaccuracies due to brain shift might occur. Intraoperative tractography is rarely performed. Elastic fusion (EF) is a tool developed to compensate for brain shift, gravity, and tissue resection based on intraoperative images. Our hypothesis was that preoperative tractography is accurate and adjustments of tractography by intraoperative magnetic resonance imaging (ioMRI)-based EF (IBEF) compensate for brain shift. Between February 2018 and June 2019, 78 patients underwent eloquent (46 motor, 32 language) glioma resection in our department using intraoperative MRI. Mean distances between the resection cavity and tractography were analyzed and correlated with clinical outcomes. The mean ± standard deviation (range) distance after the application of IBEF was 5.0 ± 2.9 mm (0–10 mm) in patients without surgery-related motor deficits compared with 1.1 ± 1.6 mm (0–5 mm) in patients who showed new permanent surgery-related motor deficits postoperatively (p < 0.001). For language, the distance was 0.7 ± 1.2 mm (0–2 mm) in patients with new permanent deficits compared with 3.1 ± 4.5 mm (0–14 mm) in patients without new permanent surgery-related language deficits (p = 0.541). Preoperative tractography corrected by IBEF for subcortical resection of gliomas is highly accurate. However, at least for such subcortical anatomy, the severity of brain shift was considerably overestimated in the past.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; (S.I.); (M.S.); (W.Z.); (A.S.); (B.M.)
- TUM Neuroimaging Center, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Maximilian Schwendner
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; (S.I.); (M.S.); (W.Z.); (A.S.); (B.M.)
- TUM Neuroimaging Center, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Wei Zhang
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; (S.I.); (M.S.); (W.Z.); (A.S.); (B.M.)
| | - Axel Schroeder
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; (S.I.); (M.S.); (W.Z.); (A.S.); (B.M.)
- TUM Neuroimaging Center, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; (S.I.); (M.S.); (W.Z.); (A.S.); (B.M.)
| | - Sandro M. Krieg
- Department of Neurosurgery, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; (S.I.); (M.S.); (W.Z.); (A.S.); (B.M.)
- TUM Neuroimaging Center, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
- Correspondence: ; Tel.: +49-89-4140-2151
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Ille S, Ohlerth AK, Colle D, Colle H, Dragoy O, Goodden J, Robe P, Rofes A, Mandonnet E, Robert E, Satoer D, Viegas CP, Visch-Brink E, van Zandvoort M, Krieg SM. Augmented reality for the virtual dissection of white matter pathways. Acta Neurochir (Wien) 2021; 163:895-903. [PMID: 33026532 PMCID: PMC7966623 DOI: 10.1007/s00701-020-04545-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/19/2020] [Indexed: 11/25/2022]
Abstract
Background The human white matter pathway network is complex and of critical importance for functionality. Thus, learning and understanding white matter tract anatomy is important for the training of neuroscientists and neurosurgeons. The study aims to test and evaluate a new method for fiber dissection using augmented reality (AR) in a group which is experienced in cadaver white matter dissection courses and in vivo tractography. Methods Fifteen neurosurgeons, neurolinguists, and neuroscientists participated in this questionnaire-based study. We presented five cases of patients with left-sided perisylvian gliomas who underwent awake craniotomy. Diffusion tensor imaging fiber tracking (DTI FT) was performed and the language-related networks were visualized separated in different tracts by color. Participants were able to virtually dissect the prepared DTI FTs using a spatial computer and AR goggles. The application was evaluated through a questionnaire with answers from 0 (minimum) to 10 (maximum). Results Participants rated the overall experience of AR fiber dissection with a median of 8 points (mean ± standard deviation 8.5 ± 1.4). Usefulness for fiber dissection courses and education in general was rated with 8 (8.3 ± 1.4) and 8 (8.1 ± 1.5) points, respectively. Educational value was expected to be high for several target audiences (student: median 9, 8.6 ± 1.4; resident: 9, 8.5 ± 1.8; surgeon: 9, 8.2 ± 2.4; scientist: 8.5, 8.0 ± 2.4). Even clinical application of AR fiber dissection was expected to be of value with a median of 7 points (7.0 ± 2.5). Conclusion The present evaluation of this first application of AR for fiber dissection shows a throughout positive evaluation for educational purposes.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, TUM Neuroimaging Center, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675 Munich, Germany
| | - Ann-Katrin Ohlerth
- Centre for Language and Cognition Groningen (CLCG), University of Groningen, Groningen, the Netherlands
| | - David Colle
- Department of Neurosurgery, St Lucas Hospital, Ghent, Belgium
| | - Henry Colle
- Department of Neurosurgery, St Lucas Hospital, Ghent, Belgium
| | - Olga Dragoy
- Center for Language and Brain, National Research University Higher School of Economics, Moscow, Russia
- Department of Medical Rehabilitation, Federal Center for Cerebrovascular Pathology and Stroke, Moscow, Russia
| | - John Goodden
- Department of Neurosurgery, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Pierre Robe
- Department of Neurosurgery, Neurology, Brain Center Rudolph Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Adrià Rofes
- Centre for Language and Cognition Groningen (CLCG), University of Groningen, Groningen, the Netherlands
| | | | - Erik Robert
- Department of Neurosurgery, St Lucas Hospital, Ghent, Belgium
| | - Djaina Satoer
- Department of Neurosurgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
| | | | - Evy Visch-Brink
- Department of Neurosurgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
| | - Martine van Zandvoort
- Department of Neurosurgery, Neurology, Brain Center Rudolph Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Sandro M. Krieg
- Department of Neurosurgery, TUM Neuroimaging Center, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675 Munich, Germany
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Ille S, Wagner A, Joerger AK, Wostrack M, Meyer B, Shiban E. Predictive Value of Transcranial Evoked Potential Monitoring for Intramedullary Spinal Cord Tumors. J Neurol Surg A Cent Eur Neurosurg 2021; 82:325-332. [PMID: 33477187 DOI: 10.1055/s-0040-1710504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Intraoperative neurophysiologic monitoring (IONM) has increased patient safety and extent of resection in patients with eloquent brain tumors. Despite its comprehensive capability for the resection of intramedullary spinal cord tumors (ISCTs), the application during the resection of these tumors is controversial. METHODS We retrospectively analyzed the resection of ISCTs in 83 consecutive cases. IONM was performed in all cases. Each patient's motor status and the McCormick scale was determined preoperatively, directly after surgery, at the day of discharge, and at long-term follow-up. RESULTS IONM was feasible in 71 cases (85.5%). Gross total resection was performed in 75 cases (90.4%). Postoperatively, patients showed new transient deficits in 12 cases (14.5%) and new permanent deficits in 12 cases (14.5%). The mean McCormick variance between baseline and long-term follow-up was - 0.08 ± 0.54. IONM's sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for the patient's motor status at the day of discharge was 75.0%, 64.7%, 45.5%, and 86.8%. It was 88.9%, 59.7%, 24.2%, and 97.4% for the motor outcome at long-term follow-up. Patients experienced postoperative complications in 15 cases (18.1%). CONCLUSION IONM, as performed in the present study, shows a high sensitivity and NPV but low specificity and PPV, particularly for the patient's motor status at the long-term follow-up. As far as practicable by a retrospective study on IONM, our results confirm IONM's usefulness for its application during the resection of ISCTs. However, these results must be approved by a prospective study.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, Technical University Munich Faculty of Medicine, München, Bayern, Germany
| | - Arthur Wagner
- Department of Neurosurgery, Technical University Munich Faculty of Medicine, München, Bayern, Germany
| | - Ann Kathrin Joerger
- Department of Neurosurgery, Technical University Munich Faculty of Medicine, München, Bayern, Germany
| | - Maria Wostrack
- Department of Neurosurgery, Technical University Munich Faculty of Medicine, München, Bayern, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University Munich Faculty of Medicine, München, Bayern, Germany
| | - Ehab Shiban
- Department of Neurosurgery, Technical University Munich Faculty of Medicine, München, Bayern, Germany.,Department of Neurosurgery, University of Augsburg, Augsburg, Bayern, Germany
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Ille S, Schroeder A, Albers L, Kelm A, Droese D, Meyer B, Krieg SM. Non-Invasive Mapping for Effective Preoperative Guidance to Approach Highly Language-Eloquent Gliomas-A Large Scale Comparative Cohort Study Using a New Classification for Language Eloquence. Cancers (Basel) 2021; 13:cancers13020207. [PMID: 33430112 PMCID: PMC7827798 DOI: 10.3390/cancers13020207] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/20/2020] [Accepted: 01/06/2021] [Indexed: 11/16/2022] Open
Abstract
Objective: A considerable number of gliomas require resection via direct electrical stimulation (DES) during awake craniotomy. Likewise, the feasibility of resecting language-eloquent gliomas purely based on navigated repetitive transcranial magnetic stimulation (nrTMS) has been shown. This study analyzes the outcomes after preoperative nrTMS-based and intraoperative DES-based glioma resection in a large cohort. Due to the necessity of making location comparable, a classification for language eloquence for gliomas is introduced. Methods: Between March 2015 and May 2019, we prospectively enrolled 100 consecutive cases that were resected based on preoperative nrTMS language mapping (nrTMS group), and 47 cases via intraoperative DES mapping during awake craniotomy (awake group) following a standardized clinical workflow. Outcome measures were determined preoperatively, 5 days after surgery, and 3 months after surgery. To make functional eloquence comparable, we developed a classification based on prior publications and clinical experience. Groups and classification scores were correlated with clinical outcomes. Results: The functional outcome did not differ between groups. Gross total resection was achieved in more cases in the nrTMS group (87%, vs. 72% in the awake group, p = 0.04). Nonetheless, the awake group showed significantly higher scores for eloquence than the nrTMS group (median 7 points; interquartile range 6-8 vs. 5 points; 3-6.75; p < 0.0001). Conclusion: Resecting language-eloquent gliomas purely based on nrTMS data is feasible in a high percentage of cases if the described clinical workflow is followed. Moreover, the proposed classification for language eloquence makes language-eloquent tumors comparable, as shown by its correlation with functional and radiological outcomes.
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Affiliation(s)
| | | | | | | | | | | | - Sandro M. Krieg
- Correspondence: ; Tel.: +49-89-4140-2151; Fax: +49-89-4140-4889
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Ille S, Schroeder A, Wagner A, Negwer C, Kreiser K, Meyer B, Krieg SM. Intraoperative MRI-based elastic fusion for anatomically accurate tractography of the corticospinal tract: correlation with intraoperative neuromonitoring and clinical status. Neurosurg Focus 2021; 50:E9. [PMID: 33386010 DOI: 10.3171/2020.10.focus20774] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 10/26/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Tractography is a useful technique that is standardly applied to visualize subcortical pathways. However, brain shift hampers tractography use during the course of surgery. While intraoperative MRI (ioMRI) has been shown to be beneficial for use in oncology, intraoperative tractography can rarely be performed due to scanner, protocol, or head clamp limitations. Elastic fusion (EF), however, enables adjustment for brain shift of preoperative imaging and even tractography based on intraoperative images. The authors tested the hypothesis that adjustment of tractography by ioMRI-based EF (IBEF) correlates with the results of intraoperative neuromonitoring (IONM) and clinical outcome and is therefore a reliable method. METHODS In 304 consecutive patients treated between June 2018 and March 2020, 8 patients, who made up the basic study cohort, showed an intraoperative loss of motor evoked potentials (MEPs) during motor-eloquent glioma resection for a subcortical lesion within the corticospinal tract (CST) as shown by ioMRI. The authors preoperatively visualized the CST using tractography. Also, IBEFs of pre- and intraoperative images were obtained and the location of the CST was compared in relation to a subcortical lesion. In 11 patients (8 patients with intraoperative loss of MEPs, one of whom also showed loss of MEPs on IBEF evaluation, plus 3 additional patients with loss of MEPs on IBEF evaluation), the authors examined the location of the CST by direct subcortical stimulation (DSCS). The authors defined the IONM results and the functional outcome data as ground truth for analysis. RESULTS The maximum mean ± SD correction was 8.8 ± 2.9 (range 3.8-12.0) mm for the whole brain and 5.3 ± 2.4 (range 1.2-8.7) mm for the CST. The CST was located within the lesion before IBEF in 3 cases and after IBEF in all cases (p = 0.0256). All patients with intraoperative loss of MEPs suffered from surgery-related permanent motor deficits. By approximation, the location of the CST after IBEF could be verified by DSCS in 4 cases. CONCLUSIONS The present study shows that tractography after IBEF accurately correlates with IONM and patient outcomes and thus demonstrates reliability in this initial study.
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Affiliation(s)
- Sebastian Ille
- 1Department of Neurosurgery.,2TUM Neuroimaging Center, and
| | - Axel Schroeder
- 1Department of Neurosurgery.,2TUM Neuroimaging Center, and
| | - Arthur Wagner
- 1Department of Neurosurgery.,2TUM Neuroimaging Center, and
| | | | - Kornelia Kreiser
- 3Department of Diagnostic and Interventional Neuroradiology, Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | | | - Sandro M Krieg
- 1Department of Neurosurgery.,2TUM Neuroimaging Center, and
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Abstract
Although intraoperative mapping of brain areas was shown to promote greater extent of resection and reduce functional deficits, this was shown only recently for some noninvasive techniques. Yet, proper surgical planning, indication, and patient consultation require reliable noninvasive techniques. Because functional magnetic resonance imaging, tractography, and neurophysiologic methods like navigated transcranial magnetic stimulation and magnetoencephalography allow identifying eloquent areas prior to resective surgery and tailor the surgical approach, this article provides an overview on the individual strengths and limitations of each modality.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Ismaninger Strasse 22, Munich 81675, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University of Munich, Germany, School of Medicine, Klinikum rechts der Isar, Ismaninger Strasse 22, Munich 81675, Germany.
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Greve T, Wagner A, Ille S, Wunderlich S, Ikenberg B, Meyer B, Zimmer C, Shiban E, Kreiser K. Motor evoked potentials during revascularization in ischemic stroke predict motor pathway ischemia and clinical outcome. Clin Neurophysiol 2020; 131:2307-2314. [PMID: 32622586 DOI: 10.1016/j.clinph.2020.05.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/22/2020] [Accepted: 05/29/2020] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The relevance of motor evoked potential (MEP) recovery during mechanical endovascular thrombectomy (MT) in patients with ischemic stroke is unclear. We correlated MEP recovery during MT to symptom improvement and to ischemia in eloquent motor areas on magnetic resonance imaging (MRI) and compared the predictive value of MEPs to visual angiographic reperfusion status, classified by modified Thrombolysis in Cerebral Infarction grading (mTICI). METHODS Patients with hemisyndrome and large-vessel occlusion undergoing MT were included (n35, 49% females; 73.9 ± 14.5 years; n31 anterior circulation). MEPs were elicited transcranially and recorded at the abductor pollicis brevis muscle bilaterally throughout the procedure. An MRI was acquired within 7 days after MT. RESULTS The median door-to-needle time was 3.5 hours. Median National Institutes of Health Stroke Scale at presentation was 16 (7 - 37). Median Modified Rankin Scale score was 4 at day 7 and 3 months. After MT, MEP-recovery occurred in 21 cases after a median time span of 4.5 min [range 2 - 11 min]. Symptom improvement at day 7 (3 months) was noted in 22 (21) cases. Absence of ischemia on postinterventional MRI was noted in 21 cases, 19 of whom showed MEP-recovery. Stratified for symptom improvement at day 7, sensitivity (specificity) of MEP-recovery was 86% (85%) and of mTICI ≥ 2b was 95% (23%). Stratified for absence of ischemia on postinterventional MRI, sensitivity (specificity) of MEP-recovery was 90% (86%) and of mTICI ≥ 2b was of 95% (21%). CONCLUSIONS MEP recovery occurs early after successful endovascular mechanical revascularization and is superior to mTICI grading in predicting postoperative neurological outcome and postoperative motor-pathway ischemia. SIGNIFICANCE This is a new, significant and clinically important study since it emphasizes the additional value of MEP monitoring in a field, which has been traditionally unaffiliated with neurophysiological monitoring.
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Affiliation(s)
- Tobias Greve
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany; Department of Neurosurgery, Ludwig-Maximilians-University, Campus Grosshadern, Munich, Germany.
| | - Arthur Wagner
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Silke Wunderlich
- Department of Neurology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Benno Ikenberg
- Department of Neurology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Claus Zimmer
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Ehab Shiban
- Department of Neurosurgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany; Department of Neurosurgery, Universitätsklinikum Augsburg, Augsburg, Germany
| | - Kornelia Kreiser
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
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Sollmann N, Zhang H, Fratini A, Wildschuetz N, Ille S, Schröder A, Zimmer C, Meyer B, Krieg SM. Risk Assessment by Presurgical Tractography Using Navigated TMS Maps in Patients with Highly Motor- or Language-Eloquent Brain Tumors. Cancers (Basel) 2020; 12:cancers12051264. [PMID: 32429502 PMCID: PMC7281396 DOI: 10.3390/cancers12051264] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 04/29/2020] [Accepted: 05/10/2020] [Indexed: 11/30/2022] Open
Abstract
Patients with functionally eloquent brain lesions are at risk of functional decline in the course of resection. Given tumor-related plastic reshaping and reallocation of function, individual data are needed for patient counseling and risk assessment prior to surgery. This study evaluates the utility of mapping by navigated transcranial magnetic stimulation (nTMS) and nTMS-based diffusion tensor imaging fiber tracking (DTI FT) for individual risk evaluation of surgery-related decline of motor or language function in the clinical setting. In total, 250 preoperative nTMS mappings (100 language and 150 motor mappings) derived from 216 patients (mean age: 57.0 ± 15.5 years, 58.8% males; glioma World Health Organization (WHO) grade I & II: 4.2%, glioma WHO grade III & IV: 83.4%, arteriovenous malformations: 1.9%, cavernoma: 2.3%, metastasis: 8.2%) were included. Deterministic tractography based on nTMS motor or language maps as seed regions was performed with 25%, 50%, and 75% of the individual fractional anisotropy threshold (FAT). Lesion-to-tract distances (LTDs) were measured between the tumor mass and the corticospinal tract (CST), arcuate fascicle (AF), or other closest language-related tracts. LTDs were compared between patients and correlated to the functional status (no/transient/permanent surgery-related paresis or aphasia). Significant differences were found between patients with no or transient surgery-related deficits and patients with permanent surgery-related deficits regarding LTDs in relation to the CST (p < 0.0001), AF (p ≤ 0.0491), or other closest language-related tracts (p ≤ 0.0435). The cut-off values for surgery-related paresis or aphasia were ≤12 mm (LTD—CST) and ≤16 mm (LTD—AF) or ≤25 mm (LTD—other closest language-related tract), respectively. Moreover, there were significant associations between the status of surgery-related deficits and the LTD when considering the CST (range r: −0.3994 to −0.3910, p < 0.0001) or AF (range r: −0.2918 to −0.2592, p = 0.0135 and p = 0.0473 for 25% and 50% FAT). In conclusion, this is the largest study evaluating the application of both preoperative functional mapping and function-based tractography for motor and language function for risk stratification in patients with functionally eloquent tumors. The LTD may qualify as a viable marker that can be seamlessly assessed in the clinical neurooncological setup.
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Affiliation(s)
- Nico Sollmann
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
- TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany;
| | - Haosu Zhang
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
| | - Alessia Fratini
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
| | - Noémie Wildschuetz
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
| | - Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
| | - Axel Schröder
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
| | - Claus Zimmer
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany;
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
| | - Sandro M. Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 Munich, Germany; (N.S.); (H.Z.); (A.F.); (N.W.); (S.I.); (A.S.); (B.M.)
- TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany
- Correspondence:
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Shiban E, Ille S, Meyer B. Intraoperatives Neuromonitoring in der Wirbelsäulenchirurgie. KLIN NEUROPHYSIOL 2019. [DOI: 10.1055/a-1009-4971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
ZusammenfassungDas intraoperative Neuromonitoring (IONM) findet abgesehen von seiner Anwendung bei der Resektion von supratentoriellen Raumforderungen auch Anwendung in der Wirbelsäulenchirurgie. Hier muss einerseits zwischen verschiedenen Indikationen für den Einsatz des IONM, sowie den einzelnen IONM-Modalitäten unterschieden werden. Diese werden teilweise kontrovers diskutiert. Im folgenden Artikel sollen sowohl die Indikationen wie auch die Modalitäten des IONM in der Wirbelsäulenchirurgie beschrieben und basierend auf der aktuellen Evidenz diskutiert werden.
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Affiliation(s)
- Ehab Shiban
- Neurochirurgische Klinik und Poliklinik; Fakultät für Medizin, Klinikum rechts der Isar, Technische Universität München
- Neurochirurgische Klinik, Universitätsklinikum Augsburg
| | - Sebastian Ille
- Neurochirurgische Klinik und Poliklinik; Fakultät für Medizin, Klinikum rechts der Isar, Technische Universität München
| | - Bernhard Meyer
- Neurochirurgische Klinik und Poliklinik; Fakultät für Medizin, Klinikum rechts der Isar, Technische Universität München
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Sollmann N, Kelm A, Ille S, Schröder A, Zimmer C, Ringel F, Meyer B, Krieg SM. Setup presentation and clinical outcome analysis of treating highly language-eloquent gliomas via preoperative navigated transcranial magnetic stimulation and tractography. Neurosurg Focus 2019; 44:E2. [PMID: 29852769 DOI: 10.3171/2018.3.focus1838] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Awake surgery combined with intraoperative direct electrical stimulation (DES) and intraoperative neuromonitoring (IONM) is considered the gold standard for the resection of highly language-eloquent brain tumors. Different modalities, such as functional magnetic resonance imaging (fMRI) or magnetoencephalography (MEG), are commonly added as adjuncts for preoperative language mapping but have been shown to have relevant limitations. Thus, this study presents a novel multimodal setup consisting of preoperative navigated transcranial magnetic stimulation (nTMS) and nTMS-based diffusion tensor imaging fiber tracking (DTI FT) as an adjunct to awake surgery. METHODS Sixty consecutive patients (63.3% men, mean age 47.6 ± 13.3 years) suffering from highly language-eloquent left-hemispheric low- or high-grade glioma underwent preoperative nTMS language mapping and nTMS-based DTI FT, followed by awake surgery for tumor resection. Both nTMS language mapping and DTI FT data were available for resection planning and intraoperative guidance. Clinical outcome parameters, including craniotomy size, extent of resection (EOR), language deficits at different time points, Karnofsky Performance Scale (KPS) score, duration of surgery, and inpatient stay, were assessed. RESULTS According to postoperative evaluation, 28.3% of patients showed tumor residuals, whereas new surgery-related permanent language deficits occurred in 8.3% of patients. KPS scores remained unchanged (median preoperative score 90, median follow-up score 90). CONCLUSIONS This is the first study to present a clinical outcome analysis of this very modern approach, which is increasingly applied in neurooncological centers worldwide. Although human language function is a highly complex and dynamic cortico-subcortical network, the presented approach offers excellent functional and oncological outcomes in patients undergoing surgery of lesions affecting this network.
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Affiliation(s)
- Nico Sollmann
- 1Department of Diagnostic and Interventional Neuroradiology.,3TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Germany
| | - Anna Kelm
- 2Department of Neurosurgery, and.,3TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Germany
| | - Sebastian Ille
- 2Department of Neurosurgery, and.,3TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Germany
| | | | - Claus Zimmer
- 1Department of Diagnostic and Interventional Neuroradiology.,3TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Germany
| | | | | | - Sandro M Krieg
- 2Department of Neurosurgery, and.,3TUM-Neuroimaging Center, Klinikum rechts der Isar, Technische Universität München, Germany
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Butenschön VM, Ille S, Sollmann N, Meyer B, Krieg SM. Cost-effectiveness of preoperative motor mapping with navigated transcranial magnetic brain stimulation in patients with high-grade glioma. Neurosurg Focus 2019; 44:E18. [PMID: 29852777 DOI: 10.3171/2018.3.focus1830] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Navigated transcranial magnetic stimulation (nTMS) is used to identify the motor cortex prior to surgery. Yet, there has, until now, been no published evidence on the economic impact of nTMS. This study aims to analyze the cost-effectiveness of nTMS, evaluating the incremental costs of nTMS motor mapping per additional quality-adjusted life year (QALY). By doing so, this study also provides a model allowing for future analysis of general cost-effectiveness of new neuro-oncological treatment options. METHODS The authors used a microsimulation model based on their cohort population sampled for 1000 patients over the time horizon of 2 years. A health care provider perspective was used to assemble direct costs of total treatment. Transition probabilities and health utilities were based on published literature. Effects were stated in QALYs and established for health state subgroups. RESULTS In all scenarios, preoperative mapping was considered cost-effective with a willingness-to-pay threshold < 3*per capita GDP (gross domestic product). The incremental cost-effectiveness ratio (ICER) of nTMS versus no nTMS was 45,086 Euros/QALY. Sensitivity analyses showed robust results with a high impact of total treatment costs and utility of progression-free survival. Comparing the incremental costs caused by nTMS implementation only, the ICER decreased to 1967 Euros/QALY. CONCLUSIONS Motor mapping prior to surgery provides a cost-effective tool to improve the clinical outcome and overall survival of high-grade glioma patients in a resource-limited setting. Moreover, the model used in this study can be used in the future to analyze new treatment options in neuro-oncology in terms of their general cost-effectiveness.
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Ille S, Engel L, Albers L, Schroeder A, Kelm A, Meyer B, Krieg SM. Functional Reorganization of Cortical Language Function in Glioma Patients-A Preliminary Study. Front Oncol 2019; 9:446. [PMID: 31231608 PMCID: PMC6558431 DOI: 10.3389/fonc.2019.00446] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 05/10/2019] [Indexed: 11/24/2022] Open
Abstract
Background: Functional reorganization (FR) was shown in glioma patients by direct electrical stimulation (DES) during awake craniotomy. This option for repeated mapping is available in cases of tumor recurrence and after decision for a second surgery. Navigated repetitive transcranial magnetic stimulation (nrTMS) has shown a high correlation with results of DES during awake craniotomy for language-negative sites (LNS) and allows for a non-invasive evaluation of language function. This preliminary study aims to examine FR in glioma patients by nrTMS. Methods: A cohort of eighteen patients with left-sided perisylvian gliomas underwent preoperative nrTMS language mapping twice. The mean time between mappings was 17 ± 12 months. The cortex was separated into anterior and posterior language-eloquent regions. We defined a tumor area and an area without tumor (WOT). Error rates (ER = number of errors per number of stimulations) and hemispheric dominance ratios (HDR) were calculated as the quotient of the left- and right-sided ER. Results: In cases in which most language function was located near the tumor during the first mapping, we found significantly more LNS in the tumor area during the second mapping as compared to cases in which function was not located near the tumor (p = 0.049). Patients with seizures showed fewer LNS during the second mapping. We found more changes of cortical language function in patients with a follow-up time of more than 13 months and lower WHO-graded tumors. Conclusion: Present results confirm that nrTMS can show FR of LNS in glioma patients. Its extent, clinical impact and correlation with DES requires further evaluation but could have a considerable impact in neuro-oncology.
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Affiliation(s)
- Sebastian Ille
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany.,TUM-Neuroimaging Center, Technische Universität München, Munich, Germany
| | - Lara Engel
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany.,TUM-Neuroimaging Center, Technische Universität München, Munich, Germany
| | - Lucia Albers
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany
| | - Axel Schroeder
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany.,TUM-Neuroimaging Center, Technische Universität München, Munich, Germany
| | - Anna Kelm
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany.,TUM-Neuroimaging Center, Technische Universität München, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Klinikum rechts der Isar, School of Medicine, Technische Universität München, Munich, Germany.,TUM-Neuroimaging Center, Technische Universität München, Munich, Germany
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Negwer C, Rautu I, Sollmann N, Ille S, Meyer B, Krieg S. nrTMS-based DTI fiber tracking for language-relevant subcortical fiber tracts: feasibility of the probabilistic algorithm. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Negwer C, Ille S, Sollmann N, Meyer B, Krieg S. Correlation of nTMS-based DTI fiber tracking and postsurgical neurological function in patients with motor eloquent space-occupying lesions. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Ille S, Fendel A, Meyer B, Krieg S. Cortical language function in glioma patients as measured by nrTMS. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Sollmann N, Schramm S, Ille S, Meyer B, Krieg S. Application of navigated transcranial magnetic stimulation to map the supplementary motor area in healthy subjects. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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