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Samalens L, Courivaud C, Adam JF, Barbier EL, Serduc R, Depaulis A. Innovative minimally invasive options to treat drug-resistant epilepsies. Rev Neurol (Paris) 2023:S0035-3787(23)01038-X. [PMID: 37798162 DOI: 10.1016/j.neurol.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/20/2023] [Accepted: 05/14/2023] [Indexed: 10/07/2023]
Abstract
Despite the regular discovery of new molecules, one-third of epileptic patients are resistant to antiepileptic drugs. Only a few can benefit from resective surgery, the current gold standard. Although effective in 50-70% of cases, this therapy remains risky, costly, and can be associated with long-term cognitive or neurological side effects. In addition, patients are increasingly reluctant to have a craniotomy, emphasizing the need for new less invasive therapies for focal drug-resistant epilepsies. Here, we review different minimally invasive approaches already in use in the clinic or under preclinical development to treat drug-resistant epilepsies. Localized thermolesion of the epileptogenic zone has been developed in the clinic using high-frequency thermo-coagulations or magnetic resonance imaging-guided laser or ultrasounds. Although less invasive, they have not yet significantly improved the outcomes when compared with resective surgery. Radiosurgery techniques have been used in the clinic for the last 20years and have proven efficiency. However, their efficacy is not better than resective surgery, and various side effects have been reported as well as the potential risk of sudden unexpected death associated with epilepsy. Recently, a new strategy of radiosurgery has emerged using synchrotron-generated X-ray microbeams: microbeam radiation therapy (MRT). The low divergence and high-flux of the synchrotron beams and the unique tolerance to MRT by healthy brain tissues, allows a precise targeting of specific brain regions with minimal invasiveness and limited behavioral or functional consequences in animals. Antiepileptic effects over several months have been recorded in animal models, and histological and synaptic tracing analysis suggest a reduction of neuronal connectivity as a mechanism of action. The possibility of transferring this approach to epileptic patients is discussed in this review.
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Affiliation(s)
- L Samalens
- Université Grenoble-Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France; Université Grenoble-Alpes, Inserm, UA7, STROBE, 38000 Grenoble, France
| | - C Courivaud
- Université Grenoble-Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | - J-F Adam
- Université Grenoble-Alpes, Inserm, UA7, STROBE, 38000 Grenoble, France; Centre Hospitalier Universitaire Grenoble-Alpes, 38700 La Tronche, France
| | - E L Barbier
- Université Grenoble-Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | - R Serduc
- Université Grenoble-Alpes, Inserm, UA7, STROBE, 38000 Grenoble, France
| | - A Depaulis
- Université Grenoble-Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France.
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Santacroce A, Tuleasca C, Liščák R, Motti E, Lindquist C, Radatz M, Gatterbauer B, Lippitz BE, Martínez Álvarez R, Martínez Moreno N, Kamp MA, Sandvei Skeie B, Schipmann S, Longhi M, Unger F, Sabin I, Mindermann T, Bundschuh O, Horstmann GA, van Eck AJ, Walier M, Berres M, Nakamura M, Steiger HJ, Hänggi D, Fortmann T, Alsofy SZ, Régis J, Ewelt C. Stereotactic Radiosurgery for Benign Cavernous Sinus Meningiomas: A Multicentre Study and Review of the Literature. Cancers (Basel) 2022; 14:cancers14164047. [PMID: 36011041 PMCID: PMC9406912 DOI: 10.3390/cancers14164047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 06/17/2022] [Accepted: 07/02/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Meningiomas are the most common tumours of the central nervous system (CNS). Despite their benign histology, proximity to critical neurovascular structures may lead to significant morbidity with tumour growth. This is the case for cavernous sinus meningiomas (CSMs), as their growth may surround critical neuro-vascular structures and cause significant morbidity. Radical microsurgical resection carries a high risk of additional neurological deficits, as well as the risk of death. Current management of these tumours, where treatment is indicated, has moved away from radical surgery towards radiotherapy/radiosurgery. This is particularly the case for patients who have residual or recurring tumours after previous surgery. There are many reports that describe the effectiveness of using stereotactic radiosurgery (SRS) for CSMs; however, large cohort analyses are lacking. This multicentre analysis reports the outcome data of over 1000 patients with CSMs who were treated with SRS. SRS shows a high local tumour control rate with few complications. These results agree with previous reports in the literature. SRS is a valuable primary or adjuvant treatment option for CSMs. Abstract Cavernous sinus meningiomas (CSMs) remain a surgical challenge due to the intimate involvement of their contained nerves and blood vessels. Stereotactic radiosurgery (SRS) is a safe and effective minimally invasive alternative for the treatment of small- to medium-sized CSMs. Objective: To assess the medium- to long-term outcomes of SRS for CSMs with respect to tumour growth, prevention of further neurological deterioration and improvement of existing neurological deficits. This multicentric study included data from 15 European institutions. We performed a retrospective observational analysis of 1222 consecutive patients harbouring 1272 benign CSMs. All were treated with Gamma Knife stereotactic radiosurgery (SRS). Clinical and imaging data were retrieved from each centre and entered into a common database. All tumours with imaging follow-up of less than 24 months were excluded. Detailed results from 945 meningiomas (86%) were then analysed. Clinical neurological outcomes were available for 1042 patients (85%). Median imaging follow-up was 67 months (mean 73.4, range 24–233). Median tumour volume was 6.2 cc (+/−7), and the median marginal dose was 14 Gy (+/−3). The post-treatment tumour volume decreased in 549 (58.1%), remained stable in 336 (35.6%) and increased in only 60 lesions (6.3%), yielding a local tumour control rate of 93.7%. Only 27 (2.8%) of the 60 enlarging tumours required further treatment. Five- and ten-year actuarial progression-free survival (PFS) rates were 96.7% and 90.1%, respectively. Tumour control rates were higher for women than men (p = 0.0031), and also for solitary sporadic meningiomas (p = 0.0201). There was no statistically significant difference in outcome for imaging-defined meningiomas when compared with histologically proven WHO Grade-I meningiomas (p = 0.1212). Median clinical follow up was 61 months (mean 64, range 6–233). Permanent morbidity occurred in 5.9% of cases at last follow-up. Stereotactic radiosurgery is a safe and effective method for treating benign CSM in the medium term to long term.
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Affiliation(s)
- Antonio Santacroce
- Department of Neurosurgery, St. Barbara-Klinik Hamm-Heessen, 59073 Hamm, Germany
- Department of Medicine, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany
- Correspondence:
| | - Constantin Tuleasca
- Neurosurgery Service and Gamma Knife Center, Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
- Faculté de Biologie et de Médecine (FBM), Université de Lausanne (Unil), 1005 Lausanne, Switzerland
- Signal Processing Laboratory (LTS 5), Swiss Federal Institute of Technology (EPFL), 1015 Lausanne, Switzerland
- Faculté de Médecine, Sorbonné Université, 70513 Paris, France
- Assisstance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris Sud, Centre Hospitalier Universitaire Bicêtre, Service de Neurochirurgie, 94270 Le Kremlin-Bicêtre, France
| | - Roman Liščák
- Department of Stereotactic and Radiation Neurosurgery, Na Homolce Hospital, 15000 Prague, Czech Republic
| | - Enrico Motti
- Dipartimento di Neuroscienze, Neurochirurgia, Università degli Studi di Milano, 20122 Milano, Italy; Villa Maria Cecilia Hospital, 48033 Cotignola, Italy
| | | | - Matthias Radatz
- National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital, Sheffield S10 2JF, UK
| | | | - Bodo E. Lippitz
- Interdisciplinary Centre for Radiosurgery (ICERA), Radiological Alliance, 22767 Hamburg, Germany
| | | | | | - Marcel A. Kamp
- Department of Neurosurgery, Jena University Hospital, Friedrich-Schiller-University Jena, 07747 Jena, Germany
| | - Bente Sandvei Skeie
- Department of Neurosurgery, Haukeland University Hospital, 5021 Bergen, Norway
| | - Stephanie Schipmann
- Department of Neurosurgery, Haukeland University Hospital, 5021 Bergen, Norway
| | - Michele Longhi
- Unit of Radiosurgery and Stereotactic Neurosurgery, Department of Neurosciences, Azienda Ospedaliera Universitaria, 37126 Verona, Italy
| | - Frank Unger
- Department of Neurosurgery, Medical University Graz, 8036 Graz, Austria
| | - Ian Sabin
- Gamma Knife Unit, Wellington Hospital (Platinum Medical Centre), London NW8 7JA, UK
| | - Thomas Mindermann
- Gamma Knife Center Zurich, Klinik Im Park Hirslanden, 8002 Zurich, Switzerland
| | | | | | | | - Maja Walier
- Institute of Medical Biometry, Epidemiology and Informatics, University Medical Center of Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany
- Department of Mathematics and Technology, University of Applied Sciences Koblenz, Joseph-Rovan-Allee 2, 53424 Remagen, Germany
| | - Manfred Berres
- Institute of Medical Biometry, Epidemiology and Informatics, University Medical Center of Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany
- Department of Mathematics and Technology, University of Applied Sciences Koblenz, Joseph-Rovan-Allee 2, 53424 Remagen, Germany
| | - Makoto Nakamura
- Department of Medicine, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany
- Department of Neurosurgery, Academic Hospital Köln-Merheim, 51058 Köln, Germany
| | - Hans Jakob Steiger
- Department of Neurosurgery, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Daniel Hänggi
- Department of Neurosurgery, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Thomas Fortmann
- Department of Neurosurgery, St. Barbara-Klinik Hamm-Heessen, 59073 Hamm, Germany
- Department of Medicine, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany
| | - Samer Zawy Alsofy
- Department of Neurosurgery, St. Barbara-Klinik Hamm-Heessen, 59073 Hamm, Germany
- Department of Medicine, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany
| | - Jean Régis
- Service de Neurochirurgie Fonctionnelle et Stereotaxique, Hôpital D’adulte de la Timone, 13354 Marseille, France
| | - Christian Ewelt
- Department of Neurosurgery, St. Barbara-Klinik Hamm-Heessen, 59073 Hamm, Germany
- Department of Neurosurgery, University Hospital Münster, Albert-Schweitzer-Campus 1, A1, 48149 Munster, Germany
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Kim L, Markovina S, Van Nest SJ, Eisaman S, Santanam L, Sullivan JM, Dominello M, Joiner MC, Burmeister J. Three discipline collaborative radiation therapy (3DCRT) special debate: Equipment development is stifling innovation in radiation oncology. J Appl Clin Med Phys 2019; 20:6-11. [PMID: 31127693 PMCID: PMC6753737 DOI: 10.1002/acm2.12620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/03/2019] [Accepted: 05/03/2019] [Indexed: 12/25/2022] Open
Affiliation(s)
- Leonard Kim
- Department of Radiation OncologyMD Anderson Cancer Center at CooperCamdenNJUSA
| | | | | | - Subarna Eisaman
- Department of Radiation OncologyUniversity of PittsburghPittsburghPAUSA
| | - Lakshmi Santanam
- Department of Radiation OncologyMemorial Sloan Kettering Cancer CenterNew YorkNYUSA
| | - Julie M. Sullivan
- Center for Devices and Radiological HealthU.S. Food and Drug AdministrationSilver SpringMDUSA
| | - Michael Dominello
- Department of OncologyWayne State University School of MedicineDetroitMIUSA
| | - Michael C. Joiner
- Department of OncologyWayne State University School of MedicineDetroitMIUSA
| | - Jay Burmeister
- Department of OncologyWayne State University School of MedicineDetroitMIUSA
- Gershenson Radiation Oncology CenterBarbara Ann Karmanos Cancer InstituteDetroitMIUSA
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Fardone E, Bravin A, Conti A, Bräuer-Krisch E, Requardt H, Bucci D, Le Duc G, Battaglia G, Romanelli P. Rat sensorimotor cortex tolerance to parallel transections induced by synchrotron-generated X-ray microbeams. Sci Rep 2017; 7:14290. [PMID: 29085040 PMCID: PMC5662592 DOI: 10.1038/s41598-017-14757-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 10/09/2017] [Indexed: 11/21/2022] Open
Abstract
Microbeam radiation therapy is a novel preclinical technique, which uses synchrotron-generated X-rays for the treatment of brain tumours and drug-resistant epilepsies. In order to safely translate this approach to humans, a more in-depth knowledge of the long-term radiobiology of microbeams in healthy tissues is required. We report here the result of the characterization of the rat sensorimotor cortex tolerance to microradiosurgical parallel transections. Healthy adult male Wistar rats underwent irradiation with arrays of parallel microbeams. Beam thickness, spacing and incident dose were 100 or 600 µm, 400 or 1200 µm and 360 or 150 Gy, respectively. Motor performance was carried over a 3-month period. Three months after irradiation rats were sacrificed to evaluate the effects of irradiation on brain tissues by histology and immunohistochemistry. Microbeam irradiation of sensorimotor cortex did not affect weight gain and motor performance. No gross signs of paralysis or paresis were also observed. The cortical architecture was not altered, despite the presence of cell death along the irradiation path. Reactive gliosis was evident in the microbeam path of rats irradiated with 150 Gy, whereas no increase was observed in rats irradiated with 360 Gy.
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Affiliation(s)
- Erminia Fardone
- European Synchrotron Radiation Facility, Grenoble, France.,Department of Biological Science and Program in Neuroscience, Florida State University, Tallahassee, FL, USA
| | - Alberto Bravin
- European Synchrotron Radiation Facility, Grenoble, France.
| | - Alfredo Conti
- Department of Neurosurgery, University of Messina, Messina, Italy
| | | | | | | | | | | | - Pantaleo Romanelli
- Centro Diagnostico Italiano, Brain Radiosurgery, Cyberknife Center, Milano, Italy. .,AB Medica, Lainate, Italy.
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5
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Dimitriadis A, Kirkby KJ, Nisbet A, Clark CH. Current status of cranial stereotactic radiosurgery in the UK. Br J Radiol 2015; 89:20150452. [PMID: 26689091 DOI: 10.1259/bjr.20150452] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE To investigate and benchmark the current clinical and dosimetric practices in stereotactic radiosurgery (SRS) in the UK. METHODS A detailed questionnaire was sent to 70 radiotherapy centres in the UK. 97% (68/70) of centres replied between June and December 2014. RESULTS 21 centres stated that they are practising SRS, and a further 12 centres plan to start SRS by the end of 2016. The most commonly treated indications are brain metastases and acoustic neuromas. A large range of prescription isodoses that range from 45% to 100% between different radiotherapy centres was seen. Ionization chambers and solid-water phantoms are used by the majority of centres for patient-specific quality assurance, and thermoplastic masks for patient immobilization are more commonly used than fixed stereotactic frames. The majority of centres perform orthogonal kilovoltage X-rays for localization before and during delivery. The acceptable setup accuracy reported ranges from 0.1 to 2 mm with a mean of 0.8 mm. CONCLUSION SRS has been increasing in use in the UK and will continue to increase in the next 2 years. There is no current consensus between SRS centres as a whole, or even between SRS centres with the same equipment, on the practices followed. This indicates the need for benchmarking and standardization in SRS practices within the UK. ADVANCES IN KNOWLEDGE This article outlines the current practices in SRS and provides a benchmark for reference and comparison with future research in this technique.
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Affiliation(s)
- Alexis Dimitriadis
- 1 Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, UK.,2 Department of Medical Physics, Royal County Hospital NHS Foundation Trust, Guildford, UK.,3 Radiation Dosimetry Group, National Physical Laboratory, Teddington, Middlesex, UK
| | - Karen J Kirkby
- 4 Manchester Academic Science, Institute of Cancer Sciences, University of Manchester, Manchester, UK.,5 The Christie NHS Foundation Trust, Manchester, UK
| | - Andrew Nisbet
- 1 Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, UK.,2 Department of Medical Physics, Royal County Hospital NHS Foundation Trust, Guildford, UK
| | - Catharine H Clark
- 2 Department of Medical Physics, Royal County Hospital NHS Foundation Trust, Guildford, UK.,3 Radiation Dosimetry Group, National Physical Laboratory, Teddington, Middlesex, UK
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Studer F, Serduc R, Pouyatos B, Chabrol T, Bräuer-Krisch E, Donzelli M, Nemoz C, Laissue J, Estève F, Depaulis A. Synchrotron X-ray microbeams: A promising tool for drug-resistant epilepsy treatment. Phys Med 2015; 31:607-14. [DOI: 10.1016/j.ejmp.2015.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 04/07/2015] [Accepted: 04/09/2015] [Indexed: 12/26/2022] Open
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Depaulis A, David O, Charpier S. The genetic absence epilepsy rat from Strasbourg as a model to decipher the neuronal and network mechanisms of generalized idiopathic epilepsies. J Neurosci Methods 2015; 260:159-74. [PMID: 26068173 DOI: 10.1016/j.jneumeth.2015.05.022] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/28/2015] [Accepted: 05/28/2015] [Indexed: 12/31/2022]
Abstract
First characterized in 1982, the genetic absence epilepsy rat from Strasbourg (GAERS) has emerged as an animal model highly reminiscent of a specific form of idiopathic generalized epilepsy. Both its electrophysiological (spike-and-wave discharges) and behavioral (behavioral arrest) features fit well with those observed in human patients with typical absence epilepsy and required by clinicians for diagnostic purposes. In addition, its sensitivity to antiepileptic drugs closely matches what has been described in the clinic, making this model one of the most predictive. Here, we report how the GAERS, thanks to its spontaneous, highly recurrent and easily recognizable seizures on electroencephalographic recordings, allows to address several key-questions about the pathophysiology and genetics of absence epilepsy. In particular, it offers the unique possibility to explore simultaneously the neural circuits involved in the generation of seizures at different levels of integration, using multiscale methodologies, from intracellular recording to functional magnetic resonance imaging. In addition, it has recently allowed to perform proofs of concept for innovative therapeutic strategies such as responsive deep brain stimulation or synchrotron-generated irradiation based radiosurgery.
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Affiliation(s)
- Antoine Depaulis
- Inserm, U836, F-38000 Grenoble, France; Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, F-38000 Grenoble, France; CHU de Grenoble, Hôpital Michallon, F-38000 Grenoble, France.
| | - Olivier David
- Inserm, U836, F-38000 Grenoble, France; Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, F-38000 Grenoble, France
| | - Stéphane Charpier
- Brain and Spine Institute, Pitié-Salpêtrière Hospital, Paris, France; Pierre and Marie Curie University, Paris, France
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8
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Pouyatos B, Serduc R, Chipaux M, Chabrol T, Bräuer-Krisch E, Nemoz C, Mathieu H, David O, Renaud L, Prezado Y, Laissue JA, Estève F, Charpier S, Depaulis A. Synchrotron X-ray interlaced microbeams suppress paroxysmal oscillations in neuronal networks initiating generalized epilepsy. Neurobiol Dis 2012; 51:152-60. [PMID: 23159741 DOI: 10.1016/j.nbd.2012.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 10/17/2012] [Accepted: 11/02/2012] [Indexed: 10/27/2022] Open
Abstract
Radiotherapy has shown some efficacy for epilepsies but the insufficient confinement of the radiation dose to the pathological target reduces its indications. Synchrotron-generated X-rays overcome this limitation and allow the delivery of focalized radiation doses to discrete brain volumes via interlaced arrays of microbeams (IntMRT). Here, we used IntMRT to target brain structures involved in seizure generation in a rat model of absence epilepsy (GAERS). We addressed the issue of whether and how synchrotron radiotherapeutic treatment suppresses epileptic activities in neuronal networks. IntMRT was used to target the somatosensory cortex (S1Cx), a region involved in seizure generation in the GAERS. The antiepileptic mechanisms were investigated by recording multisite local-field potentials and the intracellular activity of irradiated S1Cx pyramidal neurons in vivo. MRI and histopathological images displayed precise and sharp dose deposition and revealed no impairment of surrounding tissues. Local-field potentials from behaving animals demonstrated a quasi-total abolition of epileptiform activities within the target. The irradiated S1Cx was unable to initiate seizures, whereas neighboring non-irradiated cortical and thalamic regions could still produce pathological oscillations. In vivo intracellular recordings showed that irradiated pyramidal neurons were strongly hyperpolarized and displayed a decreased excitability and a reduction of spontaneous synaptic activities. These functional alterations explain the suppression of large-scale synchronization within irradiated cortical networks. Our work provides the first post-irradiation electrophysiological recordings of individual neurons. Altogether, our data are a critical step towards understanding how X-ray radiation impacts neuronal physiology and epileptogenic processes.
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Affiliation(s)
- Benoît Pouyatos
- Grenoble Institut des Neurosciences, Inserm U836, Université Joseph Fourier, Grenoble, France.
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Wadas TJ, Wong EH, Weisman GR, Anderson CJ. Coordinating radiometals of copper, gallium, indium, yttrium, and zirconium for PET and SPECT imaging of disease. Chem Rev 2010; 110:2858-902. [PMID: 20415480 PMCID: PMC2874951 DOI: 10.1021/cr900325h] [Citation(s) in RCA: 671] [Impact Index Per Article: 47.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Thaddeus J Wadas
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 S. Kingshighway Blvd., Campus Box 8225 St. Louis, Missouri 63110, USA.
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Serduc R, Berruyer G, Brochard T, Renier M, Nemoz C. In vivo pink-beam imaging and fast alignment procedure for rat brain lesion microbeam radiation therapy. JOURNAL OF SYNCHROTRON RADIATION 2010; 17:325-331. [PMID: 20400830 PMCID: PMC3025656 DOI: 10.1107/s0909049510006667] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 02/21/2010] [Indexed: 05/29/2023]
Abstract
A fast 50 microm-accuracy alignment procedure has been developed for the radiosurgery of brain lesions in rats, using microbeam radiation therapy. In vivo imaging was performed using the pink beam (35-60 keV) produced by the ID17 wiggler at the ESRF opened at 120 mm and filtered. A graphical user interface has been developed in order to define the irradiation field size and to position the target with respect to the skull structures observed in X-ray images. The method proposed here allows tremendous time saving by skipping the swap from white beam to monochromatic beam and vice versa. To validate the concept, the somatosensory cortex or thalamus of GAERS rats were irradiated under several ports using this alignment procedure. The magnetic resonance images acquired after contrast agent injection showed that the irradiations were selectively performed in these two expected brain regions. Image-guided microbeam irradiations have therefore been realised for the first time ever, and, thanks to this new development, the ID17 biomedical beamline provides a major tool allowing brain radiosurgery trials on animal patients.
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Affiliation(s)
- Raphaël Serduc
- European Synchrotron Radiation Facility, Grenoble, France.
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11
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Neoadjuvant targeting of glioblastoma multiforme with radiolabeled DOTAGA–substance P—results from a phase I study. J Neurooncol 2010; 100:129-36. [DOI: 10.1007/s11060-010-0153-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Accepted: 02/23/2010] [Indexed: 12/01/2022]
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12
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High-precision radiosurgical dose delivery by interlaced microbeam arrays of high-flux low-energy synchrotron X-rays. PLoS One 2010; 5:e9028. [PMID: 20140254 PMCID: PMC2815784 DOI: 10.1371/journal.pone.0009028] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 12/16/2009] [Indexed: 11/19/2022] Open
Abstract
Microbeam Radiation Therapy (MRT) is a preclinical form of radiosurgery dedicated to brain tumor treatment. It uses micrometer-wide synchrotron-generated X-ray beams on the basis of spatial beam fractionation. Due to the radioresistance of normal brain vasculature to MRT, a continuous blood supply can be maintained which would in part explain the surprising tolerance of normal tissues to very high radiation doses (hundreds of Gy). Based on this well described normal tissue sparing effect of microplanar beams, we developed a new irradiation geometry which allows the delivery of a high uniform dose deposition at a given brain target whereas surrounding normal tissues are irradiated by well tolerated parallel microbeams only. Normal rat brains were exposed to 4 focally interlaced arrays of 10 microplanar beams (52 µm wide, spaced 200 µm on-center, 50 to 350 keV in energy range), targeted from 4 different ports, with a peak entrance dose of 200Gy each, to deliver an homogenous dose to a target volume of 7 mm3 in the caudate nucleus. Magnetic resonance imaging follow-up of rats showed a highly localized increase in blood vessel permeability, starting 1 week after irradiation. Contrast agent diffusion was confined to the target volume and was still observed 1 month after irradiation, along with histopathological changes, including damaged blood vessels. No changes in vessel permeability were detected in the normal brain tissue surrounding the target. The interlacing radiation-induced reduction of spontaneous seizures of epileptic rats illustrated the potential pre-clinical applications of this new irradiation geometry. Finally, Monte Carlo simulations performed on a human-sized head phantom suggested that synchrotron photons can be used for human radiosurgical applications. Our data show that interlaced microbeam irradiation allows a high homogeneous dose deposition in a brain target and leads to a confined tissue necrosis while sparing surrounding tissues. The use of synchrotron-generated X-rays enables delivery of high doses for destruction of small focal regions in human brains, with sharper dose fall-offs than those described in any other conventional radiation therapy.
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13
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Choi BO, Jang HS, Kang KM, Lee SW, Kang YN, Chai GY, Choi IB. Fractionated stereotactic radiotherapy in patients with primary hepatocellular carcinoma. Jpn J Clin Oncol 2006; 36:154-8. [PMID: 16520355 DOI: 10.1093/jjco/hyi236] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE The purpose of our study was to evaluate the feasibility and treatment outcomes of fractionated stereotactic radiotherapy (SRT) for primary hepatocellular carcinoma (HCC). METHODS We enrolled 20 patients who had been histologically diagnosed as HCC patients and treated by fractionated SRT. Tumor size was 2-6.5 cm (average: 3.8 cm). We prescribed 50 Gy in 5 or 10 fractions at the 85-90% isodose line of the planning target volume for 2 weeks. The follow-up period was 3-55 months (median: 23 months). RESULTS The overall response rate was 80%, with 4 patients showing complete response (20%), 14 patients showing partial response (60%) and 4 patients showing stable disease (20%). The 1-year and 2-year survival rates were 70.0 and 43.1%, respectively (median: 20 months). The 1-year and 2-year disease-free survival rates were 65.0 and 32.5%, respectively (median: 19 months). The fractionated SRT was well tolerated, because grade 3 or grade 4 toxicity was not observed. CONCLUSION These results suggest that fractionated SRT is a relatively safe and effective method for treating small primary HCC. Thus, fractionated SRT may be suggested as a local treatment of choice for small HCC when the patients are inoperable or when the patients refuse operation.
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Affiliation(s)
- Byung Ock Choi
- Department of Radiation Oncology, The Catholic University of Korea, Seoul, Korea
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El Hamri AK, Monk J, Plowman PN. Stereotactic radiosurgery at St. Bartholomew's hospital: third quinquennial review. Br J Radiol 2005; 78:384-93. [PMID: 15845929 DOI: 10.1259/bjr/25963871] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Tercier PA, Aroua A, Mirimanoff RO, Valley JF. Optimisation in stereotactic radiosurgery of AVMs: II. Comparison of arc and MMLC therapy. Z Med Phys 2005; 14:222-9. [PMID: 15656104 DOI: 10.1078/0939-3889-00228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Two stereotactic surgery methods, arc and micro-multileave collimator (MMLC) therapy, were compared in the particular case of arteriovenous malformations (AVMs) treatment. Different methods of the treatment optimisation were used. The comparison covered a group of 22 patients suffering from peripheral and central AVMs of different sizes who underwent initially arc therapy. Several parameters were evaluated to compare the two methods: 2D and 3D isodose representations, dose-volume histograms (DVHs) and probability of success. The 3D isodoses were compared for the 22 patients showing a better conformity for the MMLC (three cases are presented). The DVHs of the AVM were also in favour of MMLC. In terms of probability of success, the results showed that are therapy was superior only in the case of small spherical lesions. MMLC therapy proved to be superior to arc therapy in all cases but central spherical small volume AVMs.
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Abstract
Advances in neurosurgery and the development of stereotactic radiosurgery have expanded treatment options available for patients with brain metastases. However, despite several randomized clinical trials and multiple uncontrolled studies, there is not a uniform consensus on the best treatment strategy for all patients with brain metastases. The heterogeneity of this patient population in terms of functional status, types of underlying cancers, status of systemic disease control, and number and location of brain metastases make such consensus difficult. Nevertheless, in certain situations, there is Class I evidence that supports one approach or another. The primary objectives in the management of this patient population include improved duration and quality of survival. Very few patients achieve long-term survival after the diagnosis of a brain metastasis.
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Affiliation(s)
- Suriya A. Jeyapalan
- Brain Tumor Center, Cox 315, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA.
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Monk JE, Perks JR, Doughty D, Plowman PN. Comparison of a micro-multileaf collimator with a 5-mm-leaf-width collimator for intracranial stereotactic radiotherapy. Int J Radiat Oncol Biol Phys 2003; 57:1443-9. [PMID: 14630284 DOI: 10.1016/s0360-3016(03)01579-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE To dosimetrically compare a micro-multileaf collimator (minimum leaf width of 3 mm) with the 5-mm-leaf multileaf collimator (MLC) of a standard linear accelerator for stereotactic conformal radiotherapy treatment of intracranial lesions. MATERIALS AND METHODS Fourteen patients previously treated for a variety of irregularly shaped intracranial lesions using BrainLAB's micro-MLC were retrospectively replanned using the Varian Millennium MLC (5 mm leaf width). All planning was performed with the BrainSCAN v 5.1 software. The same fixed, noncoplanar beam arrangement was used for both plans, and identical target coverage was achieved by adjusting the MLC shape around the planning target volume (PTV). The isodose distributions and dose-volume histograms (DVH) were computed and plans were compared in terms of conformity of the prescription isodose to the PTV and dose received by surrounding normal tissue. RESULTS Equivalent PTV coverage was achieved using the 5-mm collimator by adjusting the MLC shape around the target in every case. There was a statistically significant increase in the conformity index for the Varian MLC compared with the micro-MLC (p < 0.001), indicating a worse conformity of the prescription isodose to the PTV, but this parameter was within our (and Radiation Therapy Oncology Group) clinical criterion in all cases. There was no statistically significant difference in the maximum dose to critical structures, but DVH curves demonstrated an increased volume of normal tissue irradiated to the lower isodose levels. The mean increase in the volume of critical structure enclosed within the 50% and 70% isodose surfaces was 5.7% and 4.9%, respectively. CONCLUSIONS The micro-MLC consistently improves both PTV conformity and surrounding tissue sparing when compared to that of a standard linear accelerator. However, when viewed quantitatively, the improvements are small enough that individual centers may question their choice of equipment when outfitting a stereotactic radiotherapy service.
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Swords FM, Allan CA, Plowman PN, Sibtain A, Evanson J, Chew SL, Grossman AB, Besser GM, Monson JP. Stereotactic radiosurgery XVI: a treatment for previously irradiated pituitary adenomas. J Clin Endocrinol Metab 2003; 88:5334-40. [PMID: 14602770 DOI: 10.1210/jc.2002-020356] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We report the use of stereotactic radiosurgery delivered through an adapted linear accelerator [stereotactic multiple arc radiation therapy (SMART)] for pituitary adenomas not cured by conventional therapy. All 21 patients had undergone conventional radiotherapy (45-50 Gy); 18 had also undergone prior surgery. This cohort comprised 13 patients with somatotrope adenomas, four with corticotrope adenomas, one with a lactotrope adenoma, and three with nonfunctioning pituitary adenomas (median follow-up: 33 months, range: 3-72 months). SMART has proven effective, safe, and rapidly acting. We observed an accelerated reduction in GH and IGF-I levels in acromegaly, with normalization of GH and IGF-I levels in 58%. Mean GH fell from 21.1 mU/liter to 7.9 mU/liter (7 ng/ml to 2.6 ng/ml, P < 0.01, median 25 months) faster than our predicted fall to 50% at 2 yr with conventional radiotherapy. Mean IGF-I fell from 624 ng/ml to 384 ng/ml (P < 0.001). Tumor growth was controlled in two of three nonfunctioning pituitary adenomas, and three of four corticotrope adenomas. There were no adverse effects from SMART. Notably there have been no visual sequelae or further loss of anterior pituitary function in this heavily pretreated group. Our data indicate that SMART is an effective complementary therapy for pituitary adenomas that have displayed a suboptimal response to conventional therapy including external irradiation.
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Affiliation(s)
- F M Swords
- Department of Endocrinology, St. Bartholomew's and The Royal London School of Medicine, London EC1A 7BE, United Kingdom
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Abstract
In the 50 years since Leksell developed the concepts and initial hardware for modern brain radiosurgery, the treatment has progressed to the point where it is used commonly for arteriovenous malformations, benign masses, and metastases. Radiosurgery offers patients an effective treatment of life-threatening lesions with a reasonably low risk for discomfort and injury. In the 1990s, the procedure was used widely as primary and adjuvant treatment. The difficulty of defining the boundaries of primary brain cancers makes determining treatment targets problematic. Better imaging and computing offer a bright future for the technology.
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Affiliation(s)
- R P Symonds
- University Department of Oncology, Leicester Royal Infirmary, Leicester LE1 5WW, UK.
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Mahmoud-Ahmed AS, Suh JH, Mayberg MR. Gamma knife radiosurgery in the management of patients with acromegaly: a review. Pituitary 2001; 4:223-30. [PMID: 12501972 DOI: 10.1023/a:1020794329975] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Although acromegaly is a rare disease, the need for an effective treatment that is able to induce biochemical cure is an extremely important issue. Unsuccessfully treated acromegaly is associated with increased morbidity and an age-corrected mortality so that early and aggressive therapy to normalize hormonal levels should be instituted at diagnosis. Ideally, the growth hormone-secreting adenoma should be completely resected, with preservation or subsequent restoration of pituitary function. Patients with recurrence or failure after surgery are treated with a second surgery, medical, radiation treatment, or combined modality treatment. Steotactic radiosurgery with gamma knife allows the delivery of focused radiation in a single session to the pituitary tumor that delivers a more biologically effective dose to the tumor than fractionated radiotherapy. Its use as a primary or adjuvant treatment for acromegalics may be more cost effective than medical treatment in these patients. Although it seems to be very effective in controlling growth and secretion of the growth hormone-secreting pituitary adenomas, there is a chance that some major risks from gamma knife radiosurgery might occur. This article will review the role that gamma knife radiosurgery might have in patients with acromegaly.
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Affiliation(s)
- A S Mahmoud-Ahmed
- Departments of Radiation Oncology, Brain Tumor Institute, Cleveland Clinic Cancer Center, The Cleveland Clinic, Cleveland, OH 44195, USA
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Crockard HA, Steel T, Plowman N, Singh A, Crossman J, Revesz T, Holton JL, Cheeseman A. A multidisciplinary team approach to skull base chordomas. J Neurosurg 2001; 95:175-83. [PMID: 11780885 DOI: 10.3171/jns.2001.95.2.0175] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT A multidisciplinary team devised a protocol for long-term care of patients with skull base chordomas. In this study they describe their approach. METHODS Forty-two patients presented between 1986 and 1998 and were treated by maximum surgical cytoreduction and photon radiation therapy. Tumor volume-doubling time determined on the basis of magnetic resonance imaging, immunostaining, and cell proliferation (Ki67 labeling index [LI]) studies indicated growth rates of individual chordomas. The best outlook was associated with the greatest extent of tumor removal achieved during the first operation. There were no deaths associated with patients who underwent first-time surgery, but there was a 7.1% mortality rate associated with those who underwent subsequent operations. Cerebrospinal fluid leaks, additional cranial nerve palsies, and pharyngeal wound problems were the most difficult management problems encountered after second and subsequent surgeries. The time interval between operations was usually between 2 years and 3 years after the first surgery; very few patients required a second surgery, with a quiescent period in excess of 5 years. Life-table 5- and 10-year survival rates were 77% and 69%, respectively. CONCLUSIONS The authors believe that this series of skull base chordomas provides new insights into the management of these lesions, particularly with regard to techniques that increase survival times and studies that aid in formulating prognoses.
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Affiliation(s)
- H A Crockard
- Department of Surgical Neurology, The National Hospital for Neurology and Neurosurgery, London, United Kingdom.
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Crockard HA, Cheeseman A, Steel T, Revesz T, Holton JL, Plowman N, Singh A, Crossman J. A multidisciplinary team approach to skull base chondrosarcomas. J Neurosurg 2001; 95:184-9. [PMID: 11780886 DOI: 10.3171/jns.2001.95.2.0184] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT The authors review their experience with treating skull base chondrosarcomas, which are much rarer than skull base chordomas and differ from them in prognosis and treatment. METHODS Seventeen patients (12 male and five female patients) with histologically verified chondrosarcomas were followed up prospectively over a 12-year period. The mean age at presentation was 35.9 years. Most patients presented with cranial nerve palsies. Seven had undergone surgery prior to referral to the authors' unit. All underwent maximum surgical cytoreduction by the most direct surgical approach; only the two patients harboring the mesenchymal variant underwent radiotherapy. CONCLUSIONS One patient died of a pulmonary embolus; the patients harboring mesenchymal chondrosarcomas died at 20 and 36 months, respectively, after treatment. Of the remaining patients, 93% were alive 5 years postsurgery and had a projected 10-year survival rate of 84% (mean survival time 9.3 years). These data emphasize the very slow progression of this tumor compared with skull base chordoma.
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Affiliation(s)
- H A Crockard
- Department of Surgical Neurology, The National Hospital for Neurology and Neurosurgery, London, United Kingdom.
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Abstract
It has been nearly half a century since Leksell introduced brain radiosurgery. In the past decade, the procedure has become widely used as both a primary and adjuvant treatment. Radiosurgery is now commonly employed for arteriovenous malformations, brain metastases, and several benign lesions. Its use in primary brain malignancy remains of uncertain benefit. Improvements in imaging, hardware, and software promise an even greater role for the technique.
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Affiliation(s)
- M D Weil
- Sirius Medicine, LLC, 2409 Bitterroot Lane, Golden, CO 80401, USA.
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