1
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Tan BH, Kandasamy R, Mohamad SA, Thambinayagam HC. Predictors of radiation-induced changes in arteriovenous malformation patients undergoing radiosurgery: Insights from a Malaysian linear accelerator cohort. Surg Neurol Int 2024; 15:223. [PMID: 38974554 PMCID: PMC11225504 DOI: 10.25259/sni_366_2024] [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: 05/13/2024] [Accepted: 06/07/2024] [Indexed: 07/09/2024] Open
Abstract
Background Radiation-induced changes (RICs) post-stereotactic radiosurgery (SRS) critically influence outcomes in arteriovenous malformation (AVM) treatments. This study aimed to identify predictors of RICs, described the types and severity of RICs, and assessed their impact on patient's functional outcomes to enhance risk assessment and treatment planning for AVM patients. Methods This retrospective study analyzed 87 AVM patients who underwent SRS at Hospital Kuala Lumpur between January 2015 and December 2020. RICs were identified through detailed magnetic resonance imaging evaluations, and predictive factors were determined using multiple logistic regression. Functional outcomes were assessed with the modified Rankin scale (mRS). Results Among the cohort, 40.2% developed RICs, with radiological RICs in 33.3%, symptomatic RICs in 5.7%, and permanent RICs in 1.1%. Severity categorization revealed 25.3% as Grade I, 13.8% as Grade II, and 1.1% as Grade III. Notably, higher Pollock-Flickinger scores and eloquence location were significant predictors of RIC occurrence. There was a significant improvement in functional outcomes post-SRS, with a marked decrease in non-favorable mRS scores from 8.0% pre-SRS to 1.1% post-SRS (P = 0.031). Conclusion The study identified the eloquence location and Pollock-Flickinger scores as predictors of RICs post-SRS. The significant reduction in non-favorable mRS scores post-SRS underscores the efficacy of SRS in improving patient outcomes. Their results highlighted the importance of personalized treatment planning, focusing on precise strategies to optimize patient outcomes in AVM management, reducing adverse effects while improving functional outcomes.
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Affiliation(s)
- Bih Huei Tan
- Department of Surgery, Division of Neurosurgery, University Malaya Medical Centre, Petaling Jaya, Malaysia
| | - Regunath Kandasamy
- Department of Neurosurgery, Gleneagles Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | | | - Hari Chandra Thambinayagam
- Department of Surgery, Division of Neurosurgery, University Malaya Medical Centre, Petaling Jaya, Malaysia
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2
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Yang W, Feghali J, Sattari SA, Hung AL, Chen Y, Huang J. The Natural History of Hemorrhage in Brain Arteriovenous Malformations-Poisson Regression Analysis of 1066 Patients in a Single Institution. Neurosurgery 2024; 94:389-398. [PMID: 37681967 DOI: 10.1227/neu.0000000000002674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 07/17/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Natural history of hemorrhage in brain arteriovenous malformations (bAVM) is reported at 2%-4% per year. Published studies using survival analysis fail to account for recurrent hemorrhagic events. In this study, we present a large, single institution series to elucidate the natural history of bAVM using multivariable Poisson regression. METHODS This is a retrospective cohort study. All patients with bAVM seen at our institution from 1990 to 2021 were included. Hemorrhages after detection of bAVM during the untreated interval were recorded. Natural history of hemorrhage was calculated by dividing number of hemorrhages by untreated interval. The frequency of hemorrhages followed a Poisson distribution. Multivariable Poisson regression with an offset variable of untreated interval in patient-years was constructed. Model selection was through a stepwise Akaike information criterion method. Stratified hemorrhagic rate was presented using different combinations of significant factors. RESULTS A total of 1066 patients with nonhereditary hemorrhagic telangiectasia harboring a single bAVM were included. Ninety (8.44%) patients had 101 hemorrhages during an untreated interval of 3596.3344 patient-years, translating to an overall hemorrhagic rate of 2.81% per year. Significant factors increasing hemorrhage risk included ruptured presentation ( P < .001), increasing age ( P < .001), female sex ( P = .043), and deep location ( P = .040). Adult male patients with ruptured presentation and deep bAVMs sustained the highest annual risk at 10.81%, whereas no hemorrhages occurred in unruptured pediatric male patients or ruptured pediatric (younger than 18 years) male patients with superficial bAVMs. CONCLUSION Hemorrhage after bAVM detection occurs in 8.41% of all patients, and the rate averages 2.81% per year. However, this risk varies from 0.00% to 10.81% per year depending on various risk factor combinations. Efforts should be made to stratify bAVM hemorrhage rate by risk factors for more precise estimation of bleeding risk if left untreated.
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Affiliation(s)
- Wuyang Yang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore , Maryland , USA
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3
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You Q, Shao X, Wang J, Chen X. Progress on Physical Field-Regulated Micro/Nanomotors for Cardiovascular and Cerebrovascular Disease Treatment. SMALL METHODS 2023; 7:e2300426. [PMID: 37391275 DOI: 10.1002/smtd.202300426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 06/02/2023] [Indexed: 07/02/2023]
Abstract
Cardiovascular and cerebrovascular diseases (CCVDs) are two major vasculature-related diseases that seriously affect public health worldwide, which can cause serious death and disability. Lack of targeting effect of the traditional CCVD treatment drugs may damage other tissues and organs, thus more specific methods are needed to solve this dilemma. Micro/nanomotors are new materials that can convert external energy into driving force for autonomous movement, which can not only enhance the penetration depth and retention rates, but also increase the contact areas with the lesion sites (such as thrombus and inflammation sites of blood vessels). Physical field-regulated micro/nanomotors using the physical energy sources with deep tissue penetration and controllable performance, such as magnetic field, light, and ultrasound, etc. are considered as the emerging patient-friendly and effective therapeutic tools to overcome the limitations of conventional CCVD treatments. Recent efforts have suggested that physical field-regulated micro/nanomotors on CCVD treatments could simultaneously provide efficient therapeutic effect and intelligent control. In this review, various physical field-driven micro/nanomotors are mainly introduced and their latest advances for CCVDs are highlighted. Last, the remaining challenges and future perspectives regarding the physical field-regulated micro/nanomotors for CCVD treatments are discussed and outlined.
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Affiliation(s)
- Qing You
- Departments of Diagnostic Radiology, Surgery, Chemical and Biomolecular Engineering, and Biomedical Engineering, Yong Loo Lin School of Medicine and Faculty of Engineering, National University of Singapore, Singapore, 119074, Singapore
| | - Xinyue Shao
- Key Laboratory of Molecular Biophysics of Hebei Province, Institute of Biophysics, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300401, P. R. China
| | - Jinping Wang
- Key Laboratory of Molecular Biophysics of Hebei Province, Institute of Biophysics, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300401, P. R. China
| | - Xiaoyuan Chen
- Departments of Diagnostic Radiology, Surgery, Chemical and Biomolecular Engineering, and Biomedical Engineering, Yong Loo Lin School of Medicine and Faculty of Engineering, National University of Singapore, Singapore, 119074, Singapore
- Nanomedicine Translational Research Program, NUS Center for Nanomedicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Clinical Imaging Research Centre, Centre for Translational Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117599, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology, and Research (A*STAR), Singapore, 138673, Singapore
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4
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Nguyen BT, Tran HM, Huynh CT, Nguyen TM, Nguyen VT, Karras CL, Huynh-Le P. Gamma Knife Radiosurgery for Spetzler-Martin Grade III Brain Arteriovenous Malformations. World Neurosurg 2023; 175:e796-e803. [PMID: 37061031 DOI: 10.1016/j.wneu.2023.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 04/17/2023]
Abstract
BACKGROUND Spetzler-Martin (SM) grade III arteriovenous malformations (AVMs) show angioarchitecture heterogeneity and lack a clearly defined treatment strategy. This study aims to evaluate outcomes after treatment of SM grade III AVMs with Gamma Knife radiosurgery (GKRS). METHODS A single-institution retrospective analysis was conducted of 307 patients with SM grade III AVMs undergoing GKRS between October 2006 and December 2020 with follow-up times of at least 24 months. SM grade III AVMs were classified into 4 subtypes: IIIA (S1E1V1), IIIB (S2E0V1), subtype IIIC (S2E1V0), and IIID (S3E0V0). RESULTS Over a median follow-up time of 50.3 months, complete AVM obliteration was achieved in 211 patients (68.7%). Complete obliteration rates in subtypes IIIA, IIIB, IIIC, and IIID were 80.8%, 55.4%, 53.4%, and 25.0%, respectively. Annual post-GKRS hemorrhage risk was 0.8%. Significant radiosurgery-induced imaging changes occurred in 7 patients (2.3%). Three variables were identified as predictors of obliteration in final forward stepwise regression models, including volume of AVM (B = -0.011; P < 0.001), age (B = -0.004; P = 0.024), and previous AVM hemorrhage (B = 0.187; P = 0.077). CONCLUSIONS GKRS is a safe and effective treatment for SM grade III AVMs, particularly subtype IIIA (S1E1V1). AVM volume is the key predictor of post-GKRS obliteration.
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Affiliation(s)
- Binh Thanh Nguyen
- Department of Neurosurgery, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Huy Minh Tran
- Department of Neurosurgery, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | | | - Tu Minh Nguyen
- Department of Neurosurgery, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Vu Tuong Nguyen
- Department of Neurosurgery, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Constantine L Karras
- Department of Neurological Surgery, Northwestern University, Chicago, Illinois, USA
| | - Phuong Huynh-Le
- Department of Neurosurgery, Cho Ray Hospital, Ho Chi Minh City, Vietnam
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5
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Huang PW, Peng SJ, Pan DHC, Yang HC, Tsai JT, Shiau CY, Su IC, Chen CJ, Wu HM, Lin CJ, Chung WY, Guo WY, Lo WL, Lai SW, Lee CC. Compactness index: a radiosurgery outcome predictor for patients with unruptured brain arteriovenous malformations. J Neurosurg 2023; 138:241-250. [PMID: 35594883 DOI: 10.3171/2022.4.jns212369] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 04/07/2022] [Indexed: 01/04/2023]
Abstract
OBJECTIVE The goal of the study was to define and quantify brain arteriovenous malformation (bAVM) compactness and to assess its effect on outcomes after Gamma Knife radiosurgery (GKRS) for unruptured bAVMs. METHODS Unsupervised machine learning with fuzzy c-means clustering was used to differentiate the tissue constituents of bAVMs on T2-weighted MR images. The percentages of vessel, brain, and CSF were quantified. The proposed compactness index, defined as the ratio of vasculature tissue to brain tissue, categorized bAVM morphology into compact, intermediate, and diffuse types according to the tertiles of this index. The outcomes of interest were complete obliteration and radiation-induced changes (RICs). RESULTS A total of 209 unruptured bAVMs treated with GKRS were retrospectively included. The median imaging and clinical follow-up periods were 49.2 and 72.3 months, respectively. One hundred seventy-three bAVMs (82.8%) achieved complete obliteration after a median latency period of 43.3 months. The rates of RIC and permanent RIC were 76.1% and 3.8%, respectively. Post-GKRS hemorrhage occurred in 14 patients (6.7%), resulting in an annual bleeding risk of 1.0%. Compact bAVM, smaller bAVM volume, and exclusively superficial venous drainage were independent predictors of complete obliteration. Diffuse bAVM morphology, larger bAVM volume, and higher margin dose were independently associated with RICs. CONCLUSIONS The compactness index quantitatively describes the compactness of unruptured bAVMs. Moreover, compact bAVMs may have a higher obliteration rate and a smaller risk of RICs than diffuse bAVMs. This finding could help guide decision-making regarding GKRS treatment for patients with unruptured bAVMs.
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Affiliation(s)
- Po-Wei Huang
- 1Department of Radiation Oncology, Shuang Ho Hospital, Taipei Medical University, New Taipei City
| | - Syu-Jyun Peng
- 2Program in Artificial Intelligence in Medicine, College of Medicine, Taipei Medical University, Taipei
| | - David Hung-Chi Pan
- 3Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei.,4Department of Neurosurgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City.,14Taipei Neuroscience Institute, Taipei Medical University, Taipei, Taiwan; and
| | - Huai-Che Yang
- 3Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - Jo-Ting Tsai
- 1Department of Radiation Oncology, Shuang Ho Hospital, Taipei Medical University, New Taipei City.,11Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei.,13Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei
| | - Cheng-Ying Shiau
- 8Cancer Center, Taipei Veterans General Hospital, Taipei.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - I-Chang Su
- 4Department of Neurosurgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City.,12Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei.,14Taipei Neuroscience Institute, Taipei Medical University, Taipei, Taiwan; and
| | - Ching-Jen Chen
- 6Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Hsiu-Mei Wu
- 7Department of Radiology, Taipei Veterans General Hospital, Taipei.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - Chung-Jung Lin
- 7Department of Radiology, Taipei Veterans General Hospital, Taipei.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - Wen-Yuh Chung
- 3Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei.,5Department of Neurosurgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - Wan-Yuo Guo
- 7Department of Radiology, Taipei Veterans General Hospital, Taipei.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei
| | - Wei-Lun Lo
- 4Department of Neurosurgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City.,12Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei.,14Taipei Neuroscience Institute, Taipei Medical University, Taipei, Taiwan; and
| | - Shao-Wen Lai
- 15Product and Engineering, Zippin, San Carlos, California
| | - Cheng-Chia Lee
- 3Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei.,9School of Medicine, National Yang Ming Chiao Tung University, Taipei.,10Brain Research Center, National Yang Ming Chiao Tung University, Taipei
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6
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Becerril-Gaitan A, Ironside N, Chen CJ, Ding D. Commentary: Risk for Hemorrhage the First 2 Years After Gamma Knife Surgery for Arteriovenous Malformations: An Update. Neurosurgery 2022; 91:e153-e154. [PMID: 36250710 DOI: 10.1227/neu.0000000000002179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 08/19/2022] [Indexed: 12/15/2022] Open
Affiliation(s)
- Andrea Becerril-Gaitan
- Department of Neurosurgery, The University of Texas Health Science Center, Houston, Texas, USA
| | - Natasha Ironside
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia, USA
| | - Ching-Jen Chen
- Department of Neurosurgery, The University of Texas Health Science Center, Houston, Texas, USA
| | - Dale Ding
- Department of Neurosurgery, University of Louisville, Louisville, Kentucky, USA
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7
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Gao D, Meng X, Jin H, Liu A, Sun S. Assessment of gamma knife radiosurgery for unruptured cerebral arterioveneus malformations based on multi-parameter radiomics of MRI. Magn Reson Imaging 2022; 92:251-259. [PMID: 35870722 DOI: 10.1016/j.mri.2022.07.008] [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: 03/25/2022] [Revised: 06/13/2022] [Accepted: 07/11/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The treatment of Gamma knife radiosurgery (GKS) for unruptured Arteriovenous Malformations (AVM) remains controversial. A safe, effective and non-invasive method to predict outcome seems attractive for GKS. The purpose of this study was to develop and validate a MRI based multi-parameter radiomics model predicting the outcome of GKS for unruptured AVM. METHODS Eighty-eight unruptured AVM patients who initial underwent GKS between January 2011 and December 2016 in our hospital were included in this retrospective study. Patients were divided into two groups named as favourable and unfavourable outcome, according to the clinical outcome. Favourable outcome was defined as obliteration without post-SRS hemorrhage or permanent radiation-induced changes (RIC). Multivariate logistic regression analysis was used to select appropriate clinical features and construct a clinical predicting model. In terms of radiomic model, manually segmentation and radiomics extracted were performed on each AVM lesions. Finally, 1684 radiomics features were extracted and Recursive Feature Elimination (RFE) method combined with Random forest classifier were used for feature selection and model construction. The performance of the radiomics model was evaluated by the area under the curve (AUC), accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). In addition, the favourable group was further divided into early and late respond subgroup according to the time of obliteration evaluated by 2 years. The selected features were further compared according the respond time. RESULTS The median duration of neuroimaging follow-up was 65 months, 56 patients showed favourable outcome and 17 patients were observed obliteration within 2 years. The radiomics model constructed by 12 selected features achieved significant higher AUC of 0.88 (95% confidence interval 0.87-0.90) than traditional scoring system for predicting AVM outcome. Two selected radiomics features named "Dependence Variance" and "firstorder-Skewness" were found significant difference between the patients with early or late-respond. CONCLUSIONS The results suggest that the radiomics features could be successfully used for the pretreatment prediction of outcome for GKS in unruptured AVMs, which is helpful for decision-making process on unruptured AVM patients.
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Affiliation(s)
- Dezhi Gao
- Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Gamma-Knife Center, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xiangyu Meng
- Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Hengwei Jin
- Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ali Liu
- Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Gamma-Knife Center, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Shibin Sun
- Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Gamma-Knife Center, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
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8
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Ilyas A, Chen CJ, Abecassis IJ, Al-Saiegh F, Ironside N, Jabbour PM, Tjoumakaris S, Gooch MR, Lee CC, Sheehan JP, Ding D. Stereotactic Radiosurgery for A Randomized Trial of Unruptured Brain Arteriovenous Malformations-Eligible Patients: A Meta-Analysis. Neurosurgery 2022; 91:684-692. [PMID: 36001787 DOI: 10.1227/neu.0000000000002115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 06/12/2022] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The outcomes of A Randomized Trial of Unruptured Brain Arteriovenous Malformations (ARUBA) were controversial, and they suggested that intervention is inferior to medical management for unruptured brain arteriovenous malformations (AVMs). However, several studies have shown that stereotactic radiosurgery (SRS) is an acceptable therapy for unruptured AVMs. OBJECTIVE To test the hypothesis that ARUBA intervention arm's SRS results are meaningfully inferior to those from similar populations reported by other studies. METHODS We performed a literature review to identify SRS studies of patients who met the eligibility criteria for ARUBA. Patient, AVM, treatment, and outcome data were extracted for statistical analysis. Regression analyses were pooled to identify factors associated with post-SRS obliteration and hemorrhage. RESULTS The study cohort included 8 studies comprising 1620 ARUBA-eligible patients who underwent SRS. At the time of AVM diagnosis, 36% of patients were asymptomatic. The mean follow-up duration was 80 months. Rates of radiologic, symptomatic, and permanent radiation-induced changes were 45%, 11%, and 2%, respectively. The obliteration rate was 68% at last follow-up. The post-SRS hemorrhage and mortality rates were 8%, and 2%, respectively. Lower Spetzler-Martin grade (odds ratios [OR] = 0.84 [0.74-0.95], P = .005), lower radiosurgery-based AVM score (OR = 0.75 [0.64-0.95], P = .011), lower Virginia Radiosurgery AVM Scale (OR = 0.86 [0.78-0.95], P = .003), and higher margin dose (OR = 1.13 [1.02-1.25], P = .025) were associated with obliteration. CONCLUSION SRS carries a favorable risk to benefit profile for appropriately selected ARUBA-eligible patients, particularly those with smaller volume AVMs. Our findings suggest that the results of ARUBA do not reflect the real-world safety and efficacy of SRS for unruptured AVMs.
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Affiliation(s)
- Adeel Ilyas
- Department of Neurological Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ching-Jen Chen
- Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - Isaac Josh Abecassis
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
| | - Fadi Al-Saiegh
- Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - Natasha Ironside
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - Pascal M Jabbour
- Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - Stavropoula Tjoumakaris
- Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - M Reid Gooch
- Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - Cheng-Chia Lee
- Department of Neurosurgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jason P Sheehan
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - Dale Ding
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
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Mooney J, Salehani A, Erickson N, Thomas E, Ilyas A, Rahm S, Eustace N, Maleknia P, Yousuf O, Bredel M, Fiveash J, Dobelbower C, Fisher W. Stereotactic radiosurgery for ruptured versus unruptured intracranial arteriovenous malformations. Surg Neurol Int 2022; 13:194. [PMID: 35673645 PMCID: PMC9168326 DOI: 10.25259/sni_86_2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/22/2022] [Indexed: 11/04/2022] Open
Abstract
Background:
There are a limited data examining the effects of prior hemorrhage on outcomes after stereotactic radiosurgery (SRS). The goal of this study was to identify risk factors for arteriovenous malformation (AVM) rupture and compare outcomes, including post-SRS hemorrhage, between patients presenting with ruptured and unruptured AVMs.
Methods:
A retrospective review of consecutive patients undergoing SRS for intracranial AVMs between 2009 and 2019 at our institution was conducted. Chi-square and multivariable logistic regression analyses were utilized to identify patient and AVM factors associated with AVM rupture at presentation and outcomes after SRS including the development of recurrent hemorrhage in both ruptured and unruptured groups.
Results:
Of 210 consecutive patients with intracranial AVMs treated with SRS, 73 patients (34.8%) presented with AVM rupture. Factors associated with AVM rupture included smaller AVM diameter, deep venous drainage, cerebellar location, and the presence of intranidal aneurysms (P < 0.05). In 188 patients with adequate follow-up time (mean 42.7 months), the overall post-SRS hemorrhage rate was 8.5% and was not significantly different between ruptured and unruptured groups (10.3 vs. 7.5%, P = 0.51). There were no significant differences in obliteration rate, time to obliteration, or adverse effects requiring surgery or steroids between unruptured and ruptured groups.
Conclusion:
Smaller AVM size, deep venous drainage, and associated intranidal aneurysms were associated with rupture at presentation. AVM rupture at presentation was not associated with an increased risk of recurrent hemorrhage or other complication after SRS when compared to unruptured AVM presentation. Obliteration rates were similar between ruptured and unruptured groups.
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Affiliation(s)
- James Mooney
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Arsalaan Salehani
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Nicholas Erickson
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Evan Thomas
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Adeel Ilyas
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Sage Rahm
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Nicholas Eustace
- Department of School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Pedram Maleknia
- Department of School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Omer Yousuf
- Department of School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States,
| | - Markus Bredel
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - John Fiveash
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Chris Dobelbower
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Winfield Fisher
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, United States,
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10
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Nguyen BT, Huynh CT, Nguyen TM, Nguyen VT, Karras CL, Huynh-Le P, Tran HM. Gamma Knife radiosurgery for brain arteriovenous malformations: a 15-year single-center experience in Southern Vietnam. World Neurosurg 2022; 163:71-79. [DOI: 10.1016/j.wneu.2022.04.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/10/2022] [Accepted: 04/11/2022] [Indexed: 11/28/2022]
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11
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Li W, Wang Y, Lu L, Zhang Y. The factors associated with obliteration following stereotactic radiosurgery in patients with brain arteriovenous malformations: a meta-analysis. ANZ J Surg 2021; 92:970-979. [PMID: 34676665 DOI: 10.1111/ans.17299] [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: 08/01/2021] [Revised: 09/26/2021] [Accepted: 10/01/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Various factors have been reported to affect the obliteration of brain arteriovenous malformations (AVM) following stereotactic radiosurgery (SRS). This meta-analysis was conducted to identify the factors potentially associated with AVM obliteration after SRS. METHODS We comprehensively searched databases and included studies that evaluated predictors of AVM obliteration after SRS using Cox proportional hazard regression analysis. Hazard ratios (HRs) with 95% confidence intervals (CIs) were utilized as effect estimates. RESULTS Twelve studies, involving 4415 AVM cases, were included. According to combined estimates on univariate (UV) and multivariate (MV) analysis, age, gender and prior haemorrhage did not affect the closure probability. The following factors showed a significant and independent association with increased AVM obliteration: smaller AVMs maximal diameter (MV, HR: 1.32), smaller AVM volume (MV, HR: 1.05), AVM volume <10-15 cc (MV, HR: 1.55), higher margin dose (MV, HR: 1.05), margin dose ≥17-18 Gy (MV, HR: 3.71) and early treatment period (MV, HR: 1.78). Previous embolization and deep-seated AVM were independently negative predictors of obliteration whereas deep venous drainage was a positive predictor. Prior surgery, compactness of nidus, lower grading scores and higher SRS maximum dose were associated factors subject to confounding factors. CONCLUSION Multiple factors associated with obliteration should be taken into consideration for selection of candidates with AVMs for SRS. AVM volume and radiation dose are the most prominent factor in assessing obliteration after SRS. Age, gender and prior haemorrhage may not affect the consideration of SRS treatment. Cautious use of SRS is needed for previously embolized AVM patients.
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Affiliation(s)
- Weiyan Li
- Department of General Surgery, Tianjin Fifth Central Hospital, Tianjin, 300450, China
| | - Yuqiang Wang
- Department of General Surgery, Tianjin Fifth Central Hospital, Tianjin, 300450, China
| | - Lantao Lu
- Department of General Surgery, Tianjin Fifth Central Hospital, Tianjin, 300450, China
| | - Yi Zhang
- Department of General Surgery, Tianjin Fifth Central Hospital, Tianjin, 300450, China
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12
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Liu R, Zhan Y, Piao J, Yang Z, Wei Y, Liu P, Chen X, Jiang Y. Treatments of unruptured brain arteriovenous malformations: A systematic review and meta-analysis. Medicine (Baltimore) 2021; 100:e26352. [PMID: 34160402 PMCID: PMC8238300 DOI: 10.1097/md.0000000000026352] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/10/2021] [Accepted: 05/28/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND The best therapeutic option for unruptured brain arteriovenous malformations (bAVMs) patients is disputed. OBJECTIVE To assess the occurrence of obliteration and complications of patients with unruptured bAVMs after various treatments. METHODS A systematic literature search was performed in PubMed, EMBASE, Web of Science, and so on to identify studies fulfilling predefined inclusion criteria. Baseline, treatment, and outcomes data were extracted for statistical analysis. RESULTS We identified 28 eligible studies totaling 5852 patients. The obliteration rates were 98% in microsurgery group (95% confidence interval (CI): 96%-99%, I2 = 74.5%), 97% in surgery group (95%CI: 95%-99%, I2 = 18.3%), 87% in endovascular treatment group (95%CI: 80%-93%, I2 = 0.0%), and 68% in radiosurgery group (95%CI: 66%-69%, I2 = 92.0%). The stroke or death rates were 1% in microsurgery group (95%CI: 0%-2%, I2 = 0.0%), 0% in surgery group (95%CI: 0%-1%, I2 = 0.0%), 4% in endovascular treatment group (95%CI: 0%-8%, I2 = 85.8%), and 3% in radiosurgery group (95%CI: 3%-4%, I2 = 82.9%). In addition, the proportions of hemorrhage were 2% in microsurgery group (95%CI: 1%-4%, I2 = 0.0%), 23% in endovascular treatment group (95%CI: 7%-39%), and 12% in radiosurgery group (95%CI: 12%-13%, I2 = 99.2%). As to neurological deficit, the occurrence was 9% in microsurgery group (95%CI: 6%-11%, I2 = 94.1%), 20% in surgery group (95%CI: 13%-27%, I2 = 0.0%), 14% in endovascular treatment group (95%CI: 10%-18%, I2 = 64.0%), and 8% in radiosurgery group (95%CI: 7%-9%, I2 = 66.6%). CONCLUSIONS We found that microsurgery might provide lasting clinical benefits in some unruptured bAVMs patients for its high obliteration rates and low hemorrhage. These findings are helpful to provide a reference basis for neurosurgeons to choose the treatment of patients with unruptured bAVMs.
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Affiliation(s)
- Renjie Liu
- Department of Neurovascular Surgery, The First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province
| | - Yongle Zhan
- Department of Epidemiology and Biostatistics, School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Jianmin Piao
- Department of Neurovascular Surgery, The First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province
| | - Zhongxi Yang
- Department of Neurovascular Surgery, The First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province
| | - Yun Wei
- Department of Neurovascular Surgery, The First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province
| | - Pengcheng Liu
- Department of Neurovascular Surgery, The First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province
| | - Xuan Chen
- Department of Neurovascular Surgery, The First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province
| | - Yu Jiang
- Department of Epidemiology and Biostatistics, School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
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13
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Predictive Factors of Radiation-Induced Changes Following Single-Session Gamma Knife Radiosurgery for Arteriovenous Malformations. J Clin Med 2021; 10:jcm10102186. [PMID: 34069336 PMCID: PMC8158695 DOI: 10.3390/jcm10102186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/11/2021] [Accepted: 05/17/2021] [Indexed: 11/16/2022] Open
Abstract
We evaluated for possible predictors of radiation-induced changes (RICs) after gamma knife radiosurgery (GKRS) for arteriovenous malformations (AVMs). We identified the nidal component within AVMs to analyze the correlation between the volume of brain parenchyma within the 50% isodose line (IDL) and RICs. We retrospectively reviewed patients with AVMs who underwent a single-session of GKRS at our institution between 2007 and 2017 with at least a 2-year minimum follow-up. Follow-up magnetic resonance images were evaluated for newly developed T2 signal changes and the proportions of nidus and intervening parenchyma were quantified. A total of 180 AVM patients (98 males and 82 females) with a median age of 34 years were included in the present study. The overall obliteration rate was 67.8%. The median target volume was 3.65 cc. The median nidus and parenchyma volumes within the 50% IDL were 1.54 cc and 2.41 cc, respectively. RICs were identified in 79 of the 180 patients (43.9%). AVMs associated with previous hemorrhages showed a significant inverse correlation with RICs. In a multivariate analysis, RICs were associated with a higher proportion of brain parenchyma within the 50% IDL (hazard ratio (HR) 169.033; p < 0.001) and inversely correlated with the proportion of nidus volume within the 50% IDL (HR 0.006; p < 0.001). Our study identified that a greater proportion of brain tissue between the nidus within the 50% IDL was significantly correlated with RICs. Nidus angioarchitectural complexity and the absence of a prior hemorrhage were also associated with RICs. The identification of possible predictors of RICs could facilitate radiosurgical planning and treatment decisions as well as the planning of appropriate follow-up after GKRS; this could minimize the risk of RICs, which would be particularly beneficial for the treatment of incidentally found asymptomatic AVMs.
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14
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Chen CJ, Ding D, Lee CC, Kearns KN, Pomeraniec IJ, Cifarelli CP, Arsanious DE, Liscak R, Hanuska J, Williams BJ, Yusuf MB, Woo SY, Ironside N, Burke RM, Warnick RE, Trifiletti DM, Mathieu D, Mureb M, Benjamin C, Kondziolka D, Feliciano CE, Rodriguez-Mercado R, Cockroft KM, Simon S, Mackley HB, Zammar SG, Patel NT, Padmanaban V, Beatson N, Saylany A, Lee JYK, Sheehan JP. Stereotactic radiosurgery with versus without prior Onyx embolization for brain arteriovenous malformations. J Neurosurg 2020; 135:742-750. [PMID: 33307527 PMCID: PMC8192588 DOI: 10.3171/2020.7.jns201731] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 07/14/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Investigations of the combined effects of neoadjuvant Onyx embolization and stereotactic radiosurgery (SRS) on brain arteriovenous malformations (AVMs) have not accounted for initial angioarchitectural features prior to neuroendovascular intervention. The aim of this retrospective, multicenter matched cohort study is to compare the outcomes of SRS with versus without upfront Onyx embolization for AVMs using de novo characteristics of the preembolized nidus. METHODS The International Radiosurgery Research Foundation AVM databases from 1987 to 2018 were retrospectively reviewed. Patients were categorized based on AVM treatment approach into Onyx embolization (OE) and SRS (OE+SRS) or SRS alone (SRS-only) cohorts and then propensity score matched in a 1:1 ratio. The primary outcome was AVM obliteration. Secondary outcomes were post-SRS hemorrhage, all-cause mortality, radiological and symptomatic radiation-induced changes (RICs), and cyst formation. Comparisons were analyzed using crude rates and cumulative probabilities adjusted for competing risk of death. RESULTS The matched OE+SRS and SRS-only cohorts each comprised 53 patients. Crude rates (37.7% vs 47.2% for the OE+SRS vs SRS-only cohorts, respectively; OR 0.679, p = 0.327) and cumulative probabilities at 3, 4, 5, and 6 years (33.7%, 44.1%, 57.5%, and 65.7% for the OE+SRS cohort vs 34.8%, 45.5%, 59.0%, and 67.1% for the SRS-only cohort, respectively; subhazard ratio 0.961, p = 0.896) of AVM obliteration were similar between the matched cohorts. The secondary outcomes of the matched cohorts were also similar. Asymptomatic and symptomatic embolization-related complication rates in the matched OE+SRS cohort were 18.9% and 9.4%, respectively. CONCLUSIONS Pre-SRS AVM embolization with Onyx does not appear to negatively influence outcomes after SRS. These analyses, based on de novo nidal characteristics, thereby refute previous studies that found detrimental effects of Onyx embolization on SRS-induced AVM obliteration. However, given the risks incurred by nidal embolization using Onyx, this neoadjuvant intervention should be used judiciously in multimodal treatment strategies involving SRS for appropriately selected large-volume or angioarchitecturally high-risk AVMs.
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Affiliation(s)
- Ching-Jen Chen
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Dale Ding
- Department of Neurosurgery, University of Louisville, Kentucky
| | - Cheng-Chia Lee
- Department of Neurosurgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Kathryn N. Kearns
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | | | | | - David E. Arsanious
- Department of Neurosurgery, West Virginia University, Morgantown, West Virginia
| | - Roman Liscak
- Department of Neurosurgery, Na Homolce Hospital, Prague, Czech Republic
| | - Jaromir Hanuska
- Department of Neurosurgery, Na Homolce Hospital, Prague, Czech Republic
| | | | - Mehran B. Yusuf
- Department of Radiation Oncology, University of Louisville, Kentucky
| | - Shiao Y. Woo
- Department of Radiation Oncology, University of Louisville, Kentucky
| | - Natasha Ironside
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Rebecca M. Burke
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | | | | | - David Mathieu
- Department of Neurosurgery, University of Sherbrooke, Canada
| | - Monica Mureb
- Department of Neurosurgery, New York University, New York, New York
| | | | | | - Caleb E. Feliciano
- Department of Neurosurgery, University of Puerto Rico, San Juan, Puerto Rico
| | | | - Kevin M. Cockroft
- Department of Neurosurgery, Pennsylvania State University, Hershey, Pennsylvania
| | - Scott Simon
- Department of Neurosurgery, Pennsylvania State University, Hershey, Pennsylvania
| | - Heath B. Mackley
- Department of Radiation Oncology, Pennsylvania State University, Hershey, Pennsylvania
| | - Samer G. Zammar
- Department of Neurosurgery, Pennsylvania State University, Hershey, Pennsylvania
| | - Neel T. Patel
- Department of Neurosurgery, Pennsylvania State University, Hershey, Pennsylvania
| | - Varun Padmanaban
- Department of Neurosurgery, Pennsylvania State University, Hershey, Pennsylvania
| | - Nathan Beatson
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Anissa Saylany
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - John Y. K. Lee
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jason P. Sheehan
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
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15
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Daou BJ, Palmateer G, Thompson BG, Maher CO, Hayman JA, Lam KL, Wahl DR, Kim M, Pandey AS. Stereotactic Radiosurgery for Brain Arteriovenous Malformations: Evaluation of Obliteration and Review of Associated Predictors. J Stroke Cerebrovasc Dis 2020; 29:104863. [PMID: 32689634 DOI: 10.1016/j.jstrokecerebrovasdis.2020.104863] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/11/2020] [Accepted: 04/02/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND High arteriovenous malformation (AVM) obliteration rates have been reported with stereotactic radiosurgery (SRS), and multiple factors have been found to be associated with AVM obliteration. These predictors have been inconsistent throughout studies. We aimed to analyze our experience with linear accelerator (LINAC)-based SRS for brain AVMs, evaluate outcomes, assess factors associated with AVM obliteration and review the various reported predictors of AVM obliteration. METHODS Electronic medical records were retrospectively reviewed to identify consecutive patients with brain AVMs treated with SRS over a 27-year period with at least 2 years of follow-up. Logistic regression analysis was performed to identify factors associated with AVM obliteration. RESULTS One hundred twenty-eight patients with 142 brain AVMs treated with SRS were included. Mean age was 34.4 years. Fifty-two percent of AVMs were associated with a hemorrhage before SRS, and 14.8% were previously embolized. Mean clinical and angiographic follow-up times were 67.8 months and 58.6 months, respectively. The median Spetzler-Martin grade was 3. Mean maximal AVM diameter was 2.8 cm and mean AVM target volume was 7.4 cm3 with a median radiation dose of 16 Gy. Complete AVM obliteration was achieved in 80.3%. Radiation-related signs and symptoms were encountered in 32.4%, only 4.9% of which consisted of a permanent deficit. Post-SRS AVM-related hemorrhage occurred in 6.3% of cases. In multivariate analysis, factors associated with AVM obliteration included younger patient age (P = .019), male gender (P = .008), smaller AVM diameter (P = .04), smaller AVM target volume (P = .009), smaller isodose surface volume (P = .005), a higher delivered radiation dose (P = .013), and having only one major draining vein (P = .04). CONCLUSIONS AVM obliteration with LINAC-based radiosurgery was safe and effective and achieved complete AVM obliteration in about 80% of cases. The most prominent predictors of AVM success included AVM size, AVM volume, radiation dose, number of draining veins and patient age.
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Affiliation(s)
- Badih J Daou
- Departments of Neurosurgery, University of Michigan, Ann Arbor, Michigan.
| | - Gregory Palmateer
- Departments of Neurosurgery, University of Michigan, Ann Arbor, Michigan.
| | - B Gregory Thompson
- Departments of Neurosurgery, University of Michigan, Ann Arbor, Michigan.
| | - Cormac O Maher
- Departments of Neurosurgery, University of Michigan, Ann Arbor, Michigan.
| | - James A Hayman
- Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
| | - Kwok L Lam
- Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
| | - Daniel R Wahl
- Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
| | - Michelle Kim
- Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
| | - Aditya S Pandey
- Departments of Neurosurgery, University of Michigan, Ann Arbor, Michigan.
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16
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Ye X, Wang L, Li K, Hao Q, Lu J, Chen X, Zhao Y. A three-dimensional color-printed system allowing complete modeling of arteriovenous malformations for surgical simulations. J Clin Neurosci 2020; 77:134-141. [PMID: 32418811 DOI: 10.1016/j.jocn.2020.04.123] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 04/27/2020] [Indexed: 01/17/2023]
Abstract
To develope a colored realistic AVM model using three-dimensional (3D) printing for surgical planning and research. Raw computed tomography angiography (CTA) and magnetic resonance venography (MRV) data were integrated and used for reconstruction. Each AVM model included the nidus, the feeding arteries, the draining veins, the sinuses, the adjacent principal arteries, and the skull. The models were employed to plan surgical and endovascular treatments. Surgical feedback was obtained using a survey. Five AVM cases were included. The AVMs and the models thereof did not differ significantly in terms of length, width, or height, as measured via magnetic resonance imaging (all p > 0.05). The 3D AVM models were thus accurate. The overall score on the questionnaire survey was >4 point; the model thus aided the planning of interventional surgery. All surgeons were confident that the 3D models reflected the true lesional boundaries. Our 3D-printed intracranial AVM models were accurate, and can be used for preoperative planning and training of residents. The models improved surgeons' understanding of AVM structure, reducing operative time.
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Affiliation(s)
- Xun Ye
- Department of Neurosurgery, Beijing Tian Tan Hospital,Capital Medical Univerisity, Beijing, China; Beijing Translational Engineering Enter for 3D printer in Clinical Neuroscience, Beijing, China; Department of Neurosurgery, Peking University International Hospital, Beijing, China
| | - Liang Wang
- Department of Neurosurgery, Peking University International Hospital, Beijing, China; Department of Neurosurgery, Tianjin Fifth Center Hospital, Tianjin, China.
| | - Kai Li
- Department of Neurosurgery, Peking University International Hospital, Beijing, China.
| | - Qiang Hao
- Department of Neurosurgery, Beijing Tian Tan Hospital,Capital Medical Univerisity, Beijing, China; Beijing Translational Engineering Enter for 3D printer in Clinical Neuroscience, Beijing, China; Department of Neurosurgery, Peking University International Hospital, Beijing, China
| | - Junlin Lu
- Department of Neurosurgery, Beijing Tian Tan Hospital,Capital Medical Univerisity, Beijing, China; Beijing Translational Engineering Enter for 3D printer in Clinical Neuroscience, Beijing, China; Department of Neurosurgery, Peking University International Hospital, Beijing, China
| | - Xiaolin Chen
- Department of Neurosurgery, Beijing Tian Tan Hospital,Capital Medical Univerisity, Beijing, China; Beijing Translational Engineering Enter for 3D printer in Clinical Neuroscience, Beijing, China; Department of Neurosurgery, Peking University International Hospital, Beijing, China
| | - Yuanli Zhao
- Department of Neurosurgery, Beijing Tian Tan Hospital,Capital Medical Univerisity, Beijing, China; Beijing Translational Engineering Enter for 3D printer in Clinical Neuroscience, Beijing, China; Department of Neurosurgery, Peking University International Hospital, Beijing, China
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17
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Chen CJ, Ding D, Wang TR, Buell TJ, Ilyas A, Ironside N, Lee CC, Kalani MY, Park MS, Liu KC, Sheehan JP. Microsurgery Versus Stereotactic Radiosurgery for Brain Arteriovenous Malformations: A Matched Cohort Study. Neurosurgery 2020; 84:696-708. [PMID: 29762746 DOI: 10.1093/neuros/nyy174] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 04/05/2018] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Microsurgery (MS) and stereotactic radiosurgery (SRS) remain the preferred interventions for the curative treatment of brain arteriovenous malformations (AVM), but their relative efficacy remains incompletely defined. OBJECTIVE To compare the outcomes of MS to SRS for AVMs through a retrospective, matched cohort study. METHODS We evaluated institutional databases of AVM patients who underwent MS and SRS. MS-treated patients were matched, in a 1:1 ratio based on patient and AVM characteristics, to SRS-treated patients. Statistical analyses were performed to compare outcomes data between the 2 cohorts. The primary outcome was defined as AVM obliteration without a new permanent neurological deficit. RESULTS The matched MS and SRS cohorts were each comprised of 59 patients. Both radiological (85 vs 11 mo; P < .001) and clinical (92 vs 12 mo; P < .001) follow-up were significantly longer for the SRS cohort. The primary outcome was achieved in 69% of each cohort. The MS cohort had a significantly higher obliteration rate (98% vs 72%; P = .001), but also had a significantly higher rate of new permanent deficit (31% vs 10%; P = .011). The posttreatment hemorrhage rate was significantly higher for the SRS cohort (10% for SRS vs 0% for MS; P = .027). In subgroup analyses of ruptured and unruptured AVMs, no significant differences between the primary outcomes were observed. CONCLUSION For patients with comparable AVMs, MS and SRS afford similar rates of deficit-free obliteration. Nidal obliteration is more frequently achieved with MS, but this intervention also incurs a greater risk of new permanent neurological deficit.
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Affiliation(s)
- Ching-Jen Chen
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Dale Ding
- Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona
| | - Tony R Wang
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Thomas J Buell
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Adeel Ilyas
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Natasha Ironside
- Department of Neurosurgery, Auckland City Hospital, Auckland, New Zealand
| | - Cheng-Chia Lee
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - M Yashar Kalani
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Min S Park
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Kenneth C Liu
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Jason P Sheehan
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
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18
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Hasegawa H, Yamamoto M, Shin M, Barfod BE. Gamma Knife Radiosurgery For Brain Vascular Malformations: Current Evidence And Future Tasks. Ther Clin Risk Manag 2019; 15:1351-1367. [PMID: 31819462 PMCID: PMC6874113 DOI: 10.2147/tcrm.s200813] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/22/2019] [Indexed: 12/25/2022] Open
Abstract
Gamma Knife radiosurgery (GKRS) has long been used for treating brain vascular malformations, including arteriovenous malformations (AVMs), dural arteriovenous fistulas (DAVFs), and cavernous malformations (CMs). Herein, current evidence and controversies regarding the role of stereotactic radiosurgery for vascular malformations are described. 1) It has already been established that GKRS achieves 70–85% obliteration rates after a 3–5-year latency period for small to medium-sized AVMs. However, late radiation-induced adverse events (RAEs) including cyst formation, encapsulated hematoma, and tumorigenesis have recently been recognized, and the associated risks, clinical courses, and outcomes are under investigation. SRS-based therapeutic strategies for relatively large AVMs, including staged GKRS and a combination of GKRS and embolization, continue to be developed, though their advantages and disadvantages warrant further investigation. The role of GKRS in managing unruptured AVMs remains controversial since a prospective trial showed no benefit of treatment, necessitating further consideration of this issue. 2) Regarding DAVFs, GKRS achieves 41–90% obliteration rates at the second post-GKRS year with a hemorrhage rate below 5%. Debate continues as to whether GKRS might serve as a first-line solo therapeutic modality given its latency period. Although the post-GKRS outcomes are thought to differ among lesion locations, further outcome analyses regarding DAVF locations are required. 3) GKRS is generally accepted as an alternative for small or medium-sized CMs in which surgery is considered to be too risky. The reported hemorrhage rates ranged from 0.5–5% after GKRS. Higher dose treatments (>15 Gy) were performed during the learning curve, while, with the current standard treatment, a dose range of 12–15 Gy is generally selected, and has resulted in acceptable complication rates (< 5%). Nevertheless, further elucidation of long-term outcomes is essential.
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Affiliation(s)
- Hirotaka Hasegawa
- Department of Neurosurgery, The University of Tokyo Hospital, Tokyo, Japan
| | | | - Masahiro Shin
- Department of Neurosurgery, The University of Tokyo Hospital, Tokyo, Japan
| | - Bierta E Barfod
- Katsuta Hospital Mito Gamma House, Hitachinaka, Ibaraki, Japan
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19
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Chen CJ, Lee CC, Ding D, Tzeng SW, Kearns KN, Kano H, Atik A, Ironside N, Joshi K, Huang PP, Kondziolka D, Mathieu D, Iorio-Morin C, Grills IS, Quinn TJ, Siddiqui Z, Marvin K, Feliciano C, Faramand A, Starke RM, Barnett G, Lunsford LD, Sheehan JP. Stereotactic Radiosurgery for Unruptured Versus Ruptured Pediatric Brain Arteriovenous Malformations. Stroke 2019; 50:2745-2751. [DOI: 10.1161/strokeaha.119.026211] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose—
The effects of prior hemorrhage on stereotactic radiosurgery (SRS) outcomes for pediatric arteriovenous malformations (AVMs) are not well defined. The aim of this multicenter, retrospective cohort study is to compare the SRS outcomes for unruptured versus ruptured pediatric AVMs.
Methods—
The International Radiosurgery Research Foundation pediatric AVM database from 1987 to 2018 was reviewed retrospectively. Favorable outcome was defined as AVM obliteration, no post-SRS hemorrhage, and no permanently symptomatic radiation-induced changes. Associations between prior hemorrhage and outcomes were adjusted for baseline differences, inverse probability weights, and competing risks.
Results—
The study cohort comprised 153 unruptured and 386 ruptured AVMs. Favorable outcome was achieved in 48.4% and 60.4% of unruptured and ruptured AVMs, respectively (adjusted odds ratio, 1.353;
P
=0.190). Cumulative AVM obliteration probabilities were 51.2%, 59.4%, 64.2%, and 70.0% for unruptured and 61.0%, 69.3%, 74.0%, and 79.3% for ruptured AVMs at 4, 6, 8, and 10 years, respectively (subhazard ratio, 1.311;
P
=0.020). Cumulative post-SRS hemorrhage probabilities were 4.5%, 5.6%, 5.6%, and 9.8% for unruptured and 4.7%, 6.1%, 6.1%, and 10.6% for ruptured AVMs at 4, 6, 8, and 10 years, respectively (subhazard ratio, 1.086;
P
=0.825). Probabilities of AVM obliteration (adjusted subhazard ratio, 0.968;
P
=0.850) and post-SRS hemorrhage (adjusted subhazard ratio, 1.663;
P
=0.251) were comparable between the 2 cohorts after inverse probability weight adjustments. Symptomatic (15.8% versus 8.1%; adjusted odds ratio, 0.400;
P
=0.008) and permanent (9.2% versus 5.0%; adjusted odds ratio, 0.441;
P
=0.045) radiation-induced change were more common in unruptured AVMs.
Conclusions—
The overall outcomes after SRS for unruptured versus ruptured pediatric AVMs are comparable. However, symptomatic and permanent radiation-induced change occur more frequently in pediatric patients with unruptured AVMs.
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Affiliation(s)
- Ching-Jen Chen
- From the Department of Neurological Surgery, University of Virginia Health System, Charlottesville (C.-J.C., K.N.K., N.I., J.P.S.)
| | - Cheng-Chia Lee
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taiwan (C.-C.L., S.-W.T.)
- School of Medicine, National Yang-Ming University, Taipei, Taiwan (C.-C.L.)
| | - Dale Ding
- Department of Neurosurgery, University of Louisville School of Medicine, KY (D.D., A.F., L.D.L.)
| | - Shih-Wei Tzeng
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taiwan (C.-C.L., S.-W.T.)
| | - Kathryn N. Kearns
- From the Department of Neurological Surgery, University of Virginia Health System, Charlottesville (C.-J.C., K.N.K., N.I., J.P.S.)
| | - Hideyuki Kano
- Department of Neurological Surgery, University of Pittsburgh, PA (H.K.)
| | - Ahmet Atik
- Department of Neurosurgery, Cleveland Clinic Foundation, OH (A.A., K.J., G.B.)
| | - Natasha Ironside
- From the Department of Neurological Surgery, University of Virginia Health System, Charlottesville (C.-J.C., K.N.K., N.I., J.P.S.)
| | - Krishna Joshi
- Department of Neurosurgery, Cleveland Clinic Foundation, OH (A.A., K.J., G.B.)
| | - Paul P. Huang
- Department of Neurosurgery, New York University Langone Medical Center (P.P.H., D.K.)
| | - Douglas Kondziolka
- Department of Neurosurgery, New York University Langone Medical Center (P.P.H., D.K.)
| | - David Mathieu
- Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Quebec, Canada (D.M., C.I.-M.)
| | - Christian Iorio-Morin
- Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Quebec, Canada (D.M., C.I.-M.)
| | - Inga S. Grills
- Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G., T.J.Q., Z.S., K.M.)
| | - Thomas J. Quinn
- Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G., T.J.Q., Z.S., K.M.)
| | - Zaid Siddiqui
- Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G., T.J.Q., Z.S., K.M.)
| | - Kim Marvin
- Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G., T.J.Q., Z.S., K.M.)
| | - Caleb Feliciano
- Section of Neurological Surgery, University of Puerto Rico, San Juan (C.F.)
| | - Andrew Faramand
- Department of Neurosurgery, University of Louisville School of Medicine, KY (D.D., A.F., L.D.L.)
| | | | - Gene Barnett
- Department of Neurosurgery, Cleveland Clinic Foundation, OH (A.A., K.J., G.B.)
| | - L. Dade Lunsford
- Department of Neurosurgery, University of Louisville School of Medicine, KY (D.D., A.F., L.D.L.)
| | - Jason P. Sheehan
- From the Department of Neurological Surgery, University of Virginia Health System, Charlottesville (C.-J.C., K.N.K., N.I., J.P.S.)
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Ding D, Chen CJ, Starke RM, Kano H, Lee JY, Mathieu D, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Kondziolka D, Barnett GH, Lunsford LD, Sheehan JP. Risk of Brain Arteriovenous Malformation Hemorrhage Before and After Stereotactic Radiosurgery. Stroke 2019; 50:1384-1391. [DOI: 10.1161/strokeaha.118.024230] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Dale Ding
- From the Department of Neurosurgery, University of Louisville, KY (D.D.)
| | - Ching-Jen Chen
- From the Department of Neurosurgery, University of Louisville, KY (D.D.)
| | - Robert M. Starke
- Department of Neurological Surgery, University of Miami, FL (R.M.S.)
| | - Hideyuki Kano
- Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.)
| | - John Y.K. Lee
- Department of Neurosurgery, University of Pennsylvania, Philadelphia (J.Y.K.L.)
| | - David Mathieu
- Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, QC, Canada (D.M.)
| | - Caleb Feliciano
- Section of Neurological Surgery, University of Puerto Rico, San Juan (C.F., R.R.-M., L.A.)
| | | | - Luis Almodovar
- Section of Neurological Surgery, University of Puerto Rico, San Juan (C.F., R.R.-M., L.A.)
| | | | - Douglas Kondziolka
- Department of Neurosurgery, New York University Langone Medical Center (D.K.)
| | - Gene H. Barnett
- Department of Neurosurgery, Cleveland Clinic Foundation, OH (G.H.B.)
| | - L. Dade Lunsford
- Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.)
| | - Jason P. Sheehan
- From the Department of Neurosurgery, University of Louisville, KY (D.D.)
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Ironside N, Chen CJ, Ding D, Ilyas A, Kumar JS, Buell TJ, Taylor D, Lee CC, Sheehan JP. Seizure Outcomes After Radiosurgery for Cerebral Arteriovenous Malformations: An Updated Systematic Review and Meta-Analysis. World Neurosurg 2018; 120:550-562.e3. [DOI: 10.1016/j.wneu.2018.08.121] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 08/14/2018] [Accepted: 08/16/2018] [Indexed: 11/30/2022]
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22
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Venous Stenosis and Hemorrhage After Radiosurgery for Cerebral Arteriovenous Malformations. World Neurosurg 2018; 122:e1615-e1625. [PMID: 30500592 DOI: 10.1016/j.wneu.2018.11.193] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND The risk of hemorrhage remains after radiosurgery for patients with arteriovenous malformations (AVMs), especially during the latency period. The effect of venous outflow stenosis on postradiosurgery AVM hemorrhage has been understudied. The present study sought to clarify the effect of venous stenosis on postradiation hemorrhage. METHODS We retrospectively reviewed the records of patients with AVM seen at our institution from 1990 to 2015. Patients who had undergone radiosurgery were included, and those without sufficient data were excluded. We performed multivariable Cox regression to evaluate the predictors of postradiosurgery hemorrhage, with specific emphasis on venous stenosis. Patients were censored from the first radiosurgery to hemorrhage or the last follow-up visit. The baseline and angiographic characteristics were compared between those with venous stenosis and those without to address potential confounders. RESULTS The present study included 240 patients, of whom 29 (12.1%) had venous stenosis. The venous stenosis cohort included more patients with venous varices (P = 0.009) and fewer with deep venous drainage (P = 0.048) compared with those without venous stenosis. Most patients had grade III or higher AVMs (63.2%), with an obliteration rate of 32.9%. In an all-inclusive multivariable Cox regression, hemorrhage risk was associated with venous stenosis (hazard ratio [HR], 3.70; P = 0.034), age (HR, 1.05; P = 0.002), AVM volume (HR, 1.04; P = 0.004), and hemorrhage before treatment (HR, 4.11; P = 0.014). Male gender was protective (HR, 0.31; P = 0.036) against hemorrhage. CONCLUSIONS We identified statistically significant risk factors for postradiosurgery AVM hemorrhage, which included advanced age, female gender, the presence of venous stenosis, a larger AVM volume, and previous hemorrhage. We recommend cautious selection of patients for radiosurgery with close follow-up after treatment, especially for patients with these risk factors.
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23
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Ding D, Ilyas A, Sheehan JP. Contemporary Management of High-Grade Brain Arteriovenous Malformations. Neurosurgery 2018; 65:24-33. [DOI: 10.1093/neuros/nyy107] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/03/2018] [Indexed: 11/13/2022] Open
Affiliation(s)
- Dale Ding
- Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona
| | - Adeel Ilyas
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jason P Sheehan
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
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Hasegawa H, Hanakita S, Shin M, Kawashima M, Takahashi W, Ishikawa O, Koizumi S, Nakatomi H, Saito N. Comparison of the Long-term Efficacy and Safety of Gamma Knife Radiosurgery for Arteriovenous Malformations in Pediatric and Adult Patients. Neurol Med Chir (Tokyo) 2018; 58:231-239. [PMID: 29769453 PMCID: PMC6002683 DOI: 10.2176/nmc.st.2018-0008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
It is debated whether the efficacy and long-term safety of gamma knife radiosurgery (GKRS) for arteriovenous malformations (AVMs) differs between adult and pediatric patients. We aimed to clarify the long-term outcomes of GKRS in pediatric patients and how they compare to those in adult patients. We collected data for 736 consecutive patients with AVMs treated with GKRS between 1990 and 2014 and divided the patients into pediatric (age < 20 years, n = 144) and adult (age ≥ 20 years, n = 592) cohorts. The mean follow-up period in the pediatric cohort was 130 months. Compared to the adult patients, the pediatric patients were significantly more likely to have a history of hemorrhage (P < 0.001). The actuarial rates of post-GKRS nidus obliteration in the pediatric cohort were 36%, 60%, and 87% at 2, 3, and 6 years, respectively. Nidus obliteration occurred earlier in the pediatric cohort than in the adult cohort (P = 0.015). The actuarial rates of post-GKRS hemorrhage in the pediatric cohort were 0.7%, 2.5%, and 2.5% at 1, 5, and 10 years, respectively. Post-GKRS hemorrhage was marginally less common in the pediatric cohort than in the adult cohort (P = 0.056). Cyst formation/encapsulated hematoma were detected in seven pediatric patients (4.9%) at a median post-GKRS timepoint of 111 months, which was not significantly different from the rate in the adult cohort. Compared to adult patients, pediatric patients experience earlier therapeutic effects from GKRS for AVMs, and this improves long-term outcomes.
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Affiliation(s)
| | | | - Masahiro Shin
- Department of Neurosurgery, University of Tokyo Hospital
| | | | | | - Osamu Ishikawa
- Department of Neurosurgery, University of Tokyo Hospital
| | | | | | - Nobuhito Saito
- Department of Neurosurgery, University of Tokyo Hospital
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Russell D, Peck T, Ding D, Chen CJ, Taylor DG, Starke RM, Lee CC, Sheehan JP. Stereotactic radiosurgery alone or combined with embolization for brain arteriovenous malformations: a systematic review and meta-analysis. J Neurosurg 2018; 128:1338-1348. [DOI: 10.3171/2016.11.jns162382] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVEEmbolization of brain arteriovenous malformations (AVMs) prior to stereotactic radiosurgery (SRS) has been reported to negatively affect obliteration rates. The goal of this systematic review and meta-analysis was to compare the outcomes of AVMs treated with embolization plus SRS (E+SRS group) and those of AVMs treated with SRS alone (SRS group).METHODSA literature review was performed using PubMed to identify studies with 10 or more AVM patients and obliteration data for both E+SRS and SRS groups. A meta-analysis was performed to compare obliteration rates between the E+SRS and SRS groups.RESULTSTwelve articles comprising 1716 patients were eligible for analysis. Among the patients with radiological follow-up data, complete obliteration was achieved in 48.4% of patients (330/681) in the E+SRS group compared with 62.7% of patients (613/978) in the SRS group. A meta-analysis of the pooled data revealed that the obliteration rate was significantly lower in the E+SRS group (OR 0.51, 95% CI 0.41–0.64, p < 0.00001). Symptomatic adverse radiation effects were observed in 6.6% (27/412 patients) and 11.1% (48/433 patients) of the E+SRS and SRS groups, respectively. The annual post-SRS hemorrhage rate was 2.0%–6.5% and 0%–2.0% for the E+SRS and SRS groups, respectively. The rates of permanent morbidity were 0%–6.7% and 0%–13.5% for the E+SRS and SRS groups, respectively.CONCLUSIONSArteriovenous malformation treatment with combined embolization and SRS is associated with lower obliteration rates than those with SRS treatment alone. However, this comparison does not fully account for differences in the initial AVM characteristics in the E+SRS group as compared with those in the SRS group. Further studies are warranted to address these limitations.
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Affiliation(s)
| | | | - Dale Ding
- 2Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Ching-Jen Chen
- 2Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Davis G. Taylor
- 2Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Robert M. Starke
- 4Deparment of Neurological Surgery, University of Miami, Florida
| | - Cheng-Chia Lee
- 3Deparment of Neurological Surgery, Taipei Veterans General Hospital, Taipei, Taiwan; and
| | - Jason P. Sheehan
- 2Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
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Ding D, Starke RM, Kano H, Lee JYK, Mathieu D, Pierce J, Huang P, Missios S, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Silva D, Abbassy M, Kondziolka D, Barnett GH, Lunsford LD, Sheehan JP. Radiosurgery for Unruptured Brain Arteriovenous Malformations: An International Multicenter Retrospective Cohort Study. Neurosurgery 2018; 80:888-898. [PMID: 28431024 DOI: 10.1093/neuros/nyx181] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Accepted: 04/10/2017] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The role of intervention in the management of unruptured brain arteriovenous malformations (AVM) is controversial. OBJECTIVE To analyze in a multicenter, retrospective cohort study, the outcomes following radiosurgery for unruptured AVMs and determine predictive factors. METHODS We evaluated and pooled AVM radiosurgery data from 8 institutions participating in the International Gamma Knife Research Foundation. Patients with unruptured AVMs and ≥12 mo of follow-up were included in the study cohort. Favorable outcome was defined as AVM obliteration, no postradiosurgical hemorrhage, and no permanently symptomatic radiation-induced changes. RESULTS The unruptured AVM cohort comprised 938 patients with a median age of 35 yr. The median nidus volume was 2.4 cm 3 , 71% of AVMs were located in eloquent brain areas, and the Spetzler-Martin grade was III or higher in 57%. The median radiosurgical margin dose was 21 Gy and follow-up was 71 mo. AVM obliteration was achieved in 65%. The annual postradiosurgery hemorrhage rate was 1.4%. Symptomatic and permanent radiation-induced changes occurred in 9% and 3%, respectively. Favorable outcome was achieved in 61%. In the multivariate logistic regression analysis, smaller AVM maximum diameter ( P = .001), the absence of AVM-associated arterial aneurysms ( P = .001), and higher margin dose ( P = .002) were found to be independent predictors of a favorable outcome. A margin dose ≥ 20 Gy yielded a significantly higher rate of favorable outcome (70% vs 36%; P < .001). CONCLUSION Radiosurgery affords an acceptable risk to benefit profile for patients harboring unruptured AVMs. These findings justify further prospective studies comparing radiosurgical intervention to conservative management for unruptured AVMs.
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Affiliation(s)
- Dale Ding
- Department of Neurosurgery, Uni-versity of Virginia, Charlottesville, Virginia
| | - Robert M Starke
- Department of Neurosurgery, Uni-versity of Virginia, Charlottesville, Virginia
| | - Hideyuki Kano
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pensylvania
| | - John Y K Lee
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - David Mathieu
- Division of Neurosurgery, University of Sher-brooke, Centre de recherché du CHUS, Sherbrooke, Quebec, Canada
| | - John Pierce
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Paul Huang
- Department of Neurosurgery, New York University Langone Medical Center, New York, New York
| | - Symeon Missios
- Department of Neurosurgery, Cleveland Clinic Foun-dation, Cleveland, Ohio
| | - Caleb Feliciano
- Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico
| | | | - Luis Almodovar
- Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico
| | - Inga S Grills
- Department of Radiation Oncology, Beaumont Health System, Royal Oak, Michigan
| | - Danilo Silva
- Department of Neurosurgery, Cleveland Clinic Foun-dation, Cleveland, Ohio
| | - Mahmoud Abbassy
- Department of Neurosurgery, Cleveland Clinic Foun-dation, Cleveland, Ohio
| | - Douglas Kondziolka
- Department of Neurosurgery, New York University Langone Medical Center, New York, New York
| | - Gene H Barnett
- Department of Neurosurgery, Cleveland Clinic Foun-dation, Cleveland, Ohio
| | - L Dade Lunsford
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pensylvania
| | - Jason P Sheehan
- Department of Neurosurgery, Uni-versity of Virginia, Charlottesville, Virginia
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Ilyas A, Chen CJ, Ding D, Taylor DG, Moosa S, Lee CC, Cohen-Inbar O, Sheehan JP. Volume-staged versus dose-staged stereotactic radiosurgery outcomes for large brain arteriovenous malformations: a systematic review. J Neurosurg 2018; 128:154-164. [PMID: 28128692 DOI: 10.3171/2016.9.jns161571] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Several recent studies have improved our understanding of the outcomes of volume-staged (VS) and dose-staged (DS) stereotactic radiosurgery (SRS) for the treatment of large (volume > 10 cm3) brain arteriovenous malformations (AVMs). In light of these recent additions to the literature, the aim of this systematic review is to provide an updated comparison of VS-SRS and DS-SRS for large AVMs. METHODS A systematic review of the literature was performed using PubMed to identify cohorts of 5 or more patients with large AVMs who had been treated with VS-SRS or DS-SRS. Baseline data and post-SRS outcomes were extracted for analysis. RESULTS A total of 11 VS-SRS and 10 DS-SRS studies comprising 299 and 219 eligible patients, respectively, were included for analysis. The mean obliteration rates for VS-SRS and DS-SRS were 41.2% (95% CI 31.4%-50.9%) and 32.3% (95% CI 15.9%-48.8%), respectively. Based on pooled individual patient data, the outcomes for patients treated with VS-SRS were obliteration in 40.3% (110/273), symptomatic radiation-induced changes (RICs) in 13.7% (44/322), post-SRS hemorrhage in 19.5% (50/256), and death in 7.4% (24/323); whereas the outcomes for patients treated with DS-SRS were obliteration in 32.7% (72/220), symptomatic RICs in 12.2% (31/254), post-SRS hemorrhage in 10.6% (30/282), and death in 4.6% (13/281). CONCLUSIONS Volume-staged SRS appears to afford higher obliteration rates than those achieved with DS-SRS, although with a less favorable complication profile. Therefore, VS-SRS or DS-SRS may be a reasonable treatment approach for large AVMs, either as stand-alone therapy or as a component of a multimodality management strategy.
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Affiliation(s)
- Adeel Ilyas
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Ching-Jen Chen
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Dale Ding
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Davis G Taylor
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Shayan Moosa
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Cheng-Chia Lee
- 2Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Or Cohen-Inbar
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Jason P Sheehan
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
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28
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Pomeraniec IJ, Ding D, Starke RM, Liu KC, Mrachek EK, Lopes MB, Sheehan JP. Delayed cyst formation after stereotactic radiosurgery for brain arteriovenous malformations. J Neurosurg 2017; 129:937-946. [PMID: 29192860 DOI: 10.3171/2017.6.jns17559] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Stereotactic radiosurgery (SRS) is a commonly employed treatment modality for brain arteriovenous malformations (AVMs). However, due to the low frequency of delayed cyst formation after AVM SRS, as well as the prolonged time interval between treatment and its occurrence, the characteristics of post-SRS cyst formation are not well defined. Therefore, the aims of this retrospective cohort study are to determine the rate of cyst formation after SRS for AVMs, identify predictive factors, and evaluate the clinical sequelae of post-SRS cysts. METHODS The authors analyzed an SRS database for AVM patients who underwent SRS at the University of Virginia and identified those who developed post-SRS cysts. Statistical analyses were performed to determine predictors of post-SRS cyst formation and the effect of cyst formation on new or worsening seizures after SRS. RESULTS The study cohort comprised 1159 AVM patients treated with SRS; cyst formation occurred in 17 patients (post-SRS cyst rate of 1.5%). Compared with patients who did not develop post-SRS cysts, those with cyst formation were treated with a greater number of radiosurgical isocenters (mean 3.8 vs 2.8, p = 0.047), had a longer follow-up (mean 132 vs 71 months, p < 0.001), were more likely to develop radiological radiation-induced changes (RIC) (64.7% vs 36.1%, p = 0.021), and had a longer duration of RIC (57 vs 21 months, p < 0.001). A higher number of isocenters (p = 0.014), radiological RIC (p = 0.002), and longer follow-up (p = 0.034) were found to be independent predictors of post-SRS cyst formation in the multivariate analysis. There was a trend toward a significant association between cyst formation and new or worsening seizures in univariate analysis (p = 0.054). CONCLUSIONS Patients with greater nidal complexity appear to be more prone to post-SRS cyst formation. The findings of this study emphasize the importance of long-term follow-up for patients who have undergone AVM SRS, even after nidal obliteration is achieved. Post-SRS cysts may be epileptogenic, although seizure outcomes after AVM SRS are multifactorial.
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Affiliation(s)
| | | | - Robert M Starke
- 5Departments of Neurosurgery and Radiology, Jackson Memorial Hospital and University of Miami Hospital, Miami, Florida
| | | | - E Kelly Mrachek
- 4Neuropathology, University of Virginia Health System, Charlottesville, Virginia; and
| | - M Beatriz Lopes
- 4Neuropathology, University of Virginia Health System, Charlottesville, Virginia; and
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29
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Ilyas A, Chen CJ, Ding D, Buell TJ, Raper DMS, Lee CC, Xu Z, Sheehan JP. Radiation-Induced Changes After Stereotactic Radiosurgery for Brain Arteriovenous Malformations: A Systematic Review and Meta-Analysis. Neurosurgery 2017; 83:365-376. [DOI: 10.1093/neuros/nyx502] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 09/11/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Adeel Ilyas
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Ching-Jen Chen
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Dale Ding
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
- Department of Neurosurgery, Barrow Neurologic Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - Thomas J Buell
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Daniel M S Raper
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Cheng-Chia Lee
- Department of Neurological Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Zhiyuan Xu
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Jason P Sheehan
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
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30
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Cohen-Inbar O, Starke RM, Lee CC, Kano H, Huang P, Kondziolka D, Grills IS, Silva D, Abbassy M, Missios S, Barnett GH, Lunsford LD, Sheehan JP. Stereotactic Radiosurgery for Brainstem Arteriovenous Malformations: A Multicenter Study. Neurosurgery 2017. [DOI: 10.1093/neuros/nyx189] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
The management of brainstem arteriovenous malformations (bAVMs) is a formidable challenge. bAVMs harbor higher morbidity and mortality compared to other locations.
OBJECTIVE
To review the outcomes following stereotactic radiosurgery (SRS) of bAVMs in a multicenter study.
METHODS
Six medical centers contributed data from 205 patients through the International Gamma Knife Research Foundation. Median age was 32 yr (6-81). Median nidus volume was 1.4 mL (0.1-69 mL). Favorable outcome (FO) was defined as AVM obliteration and no post-treatment hemorrhage or permanent symptomatic radiation-induced complications.
RESULTS
Overall obliteration was reported in 65.4% (n = 134) at a mean follow-up of 69 mo. Obliteration was angiographically proven in 53.2% (n = 109) and on MRA in 12.2% (n = 25). Actuarial rate of obliteration at 2, 3, 5, 7, and 10 yr after SRS was 24.5%, 43.3%, 62.3%, 73%, and 81.8% respectively. Patients treated with a margin dose >20 Gy were more likely to achieve obliteration (P = .001). Obliteration occurred earlier in patients who received a higher prescribed margin dose (P = .05) and maximum dose (P = .041). Post-SRS hemorrhage occurred in 8.8% (n = 18). Annual postgamma knife latency period hemorrhage was 1.5%. Radiation-induced complications were radiologically evident in 35.6% (n = 73), symptomatic in 14.6% (n = 30), and permanent in 14.6% (n = 30, which included long-tract signs and new cranial nerve deficits). FO was achieved in 64.4% (n = 132). Predictors of an FO were a higher Virginia radiosurgery AVM scale score (P = .003), prior hemorrhage (P = .045), and a lower prescribed maximum dose (P = .006).
CONCLUSION
SRS for bAVMs results in obliteration and avoids permanent complications in the majority of patients.
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Affiliation(s)
- Or Cohen-Inbar
- Department of Neurosurgery and Gam-ma-Knife center, University of Virginia, Charlottesville, Virginia
- Department of Neurosurgery, Rambam Health Care Center Haifa Israel, Technion Israel Institute of Technology, Haifa, Israel
| | - Robert M Starke
- Department of Neurosurgery and Gam-ma-Knife center, University of Virginia, Charlottesville, Virginia
| | - Cheng-Chia Lee
- Department of Neurological Surgery, Neurological Institute, Taipei Veteran General Hospital, Taipei, Taiwan
| | - Hideyuki Kano
- Department of Neurosurgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Paul Huang
- Department of Neurosurgery, New York University Langone Medical Center, New York, New York
| | - Douglas Kondziolka
- Department of Neurosurgery, New York University Langone Medical Center, New York, New York
| | - Inga S Grills
- Department of Radiation Oncology, Beaumont Health System, Royal Oak, Michigan
| | - Danilo Silva
- Rose-Ella Burkhardt Brain Tumor and Neuro-oncology center, Cleveland Clinic, Cleveland, Ohio
| | - Mohmoud Abbassy
- Rose-Ella Burkhardt Brain Tumor and Neuro-oncology center, Cleveland Clinic, Cleveland, Ohio
| | - Symeon Missios
- Rose-Ella Burkhardt Brain Tumor and Neuro-oncology center, Cleveland Clinic, Cleveland, Ohio
| | - Gene H Barnett
- Rose-Ella Burkhardt Brain Tumor and Neuro-oncology center, Cleveland Clinic, Cleveland, Ohio
| | - L Dade Lunsford
- Department of Neurosurgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jason P Sheehan
- Department of Neurosurgery and Gam-ma-Knife center, University of Virginia, Charlottesville, Virginia
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Ding D, Starke RM, Kano H, Mathieu D, Huang PP, Kondziolka D, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Silva D, Abbassy M, Missios S, Barnett GH, Lunsford LD, Sheehan JP. Stereotactic Radiosurgery for ARUBA (A Randomized Trial of Unruptured Brain Arteriovenous Malformations)–Eligible Spetzler-Martin Grade I and II Arteriovenous Malformations: A Multicenter Study. World Neurosurg 2017; 102:507-517. [DOI: 10.1016/j.wneu.2017.03.061] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/12/2017] [Accepted: 03/14/2017] [Indexed: 11/12/2022]
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Ilyas A, Chen CJ, Ding D, Mastorakos P, Taylor DG, Pomeraniec IJ, Lee CC, Sheehan J. Cyst formation after stereotactic radiosurgery for brain arteriovenous malformations: a systematic review. J Neurosurg 2017; 128:1354-1363. [PMID: 28548596 DOI: 10.3171/2016.12.jns162478] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Cyst formation can occasionally occur after stereotactic radiosurgery (SRS) for brain arteriovenous malformations (AVMs). Given the limited data regarding post-SRS cyst formation in patients with AVM, the time course, natural history, and management of this delayed complication are poorly defined. The aim of this systematic review was to determine the incidence, time course, and optimal management of cyst formation after SRS for AVMs. METHODS A literature review was performed using PubMed to identify studies reporting cyst formation in AVM patients treated with SRS. Baseline and outcomes data, including the incidence and management of post-SRS cysts, were extracted from each study that reported follow-up duration. The mean time to cyst formation was calculated from the subset of studies that reported individual patient data. RESULTS Based on pooled data from 22 studies comprising the incidence analysis, the overall rate of post-SRS cyst formation was 3.0% (78/2619 patients). Among the 26 post-SRS cyst patients with available AVM obliteration data, nidal obliteration was achieved in 20 (76.9%). Of the 64 cyst patients with available symptomatology and management data, 21 (32.8%) were symptomatic; 21 cysts (32.8%) were treated with surgical intervention, whereas the remaining 43 (67.2%) were managed conservatively. Based on a subset of 19 studies reporting individual time-to-cyst-formation data from 63 patients, the mean latency period to post-SRS cyst formation was 78 months (6.5 years). CONCLUSIONS Cyst formation is an uncommon complication after SRS for AVMs, with a relatively long latency period. The majority of post-SRS cysts are asymptomatic and can be managed conservatively, although enlarging or symptomatic cysts may require surgical intervention. Long-term follow-up of AVM patients is crucial to the appropriate diagnosis and management of post-SRS cysts.
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Affiliation(s)
- Adeel Ilyas
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Ching-Jen Chen
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Dale Ding
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Panagiotis Mastorakos
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Davis G Taylor
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - I Jonathan Pomeraniec
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
| | - Cheng-Chia Lee
- 2Department of Neurological Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jason Sheehan
- 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia; and
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Ilyas A, Ding D, Robert Hixson H, Xu Z, Starke RM, Sheehan JP. Volume-staged stereotactic radiosurgery for large intracranial arteriovenous malformations. J Clin Neurosci 2017; 43:202-207. [PMID: 28495425 DOI: 10.1016/j.jocn.2017.04.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 12/07/2016] [Accepted: 04/22/2017] [Indexed: 10/19/2022]
Abstract
Stereotactic radiosurgery (SRS) is an effective treatment option for intracranial arteriovenous malformations (AVM). However, the treatment of large AVMs (nidus volume ≥12cm3) with single-session SRS alone yields generally poor outcomes. Volume-staged SRS (VS-SRS) is a therapeutic strategy for large AVMs which seeks to avoid the disadvantages of single-session SRS, but reports regarding its efficacy remain limited. The aim of this retrospective cohort study is to assess the outcomes of VS-SRS for large AVMs. We identified all AVM patients who underwent VS-SRS at our institution from 2000 to 2015 with ≥12months follow-up. Baseline and outcomes data were analyzed. A total of 12 patients were selected for the study cohort, with a median age of 30years. The median maximum AVM diameter and nidus volume were 4.3cm and 13.6cm3, respectively. The Spetzler-Martin grade was III and IV each in six AVMs (50%). All patients underwent VS-SRS in two stages, and the median margin dose was 17Gy for both VS-SRS procedures. The median time interval between the two procedures was three months. After a median radiologic follow-up duration of 39months, the median degree of AVM volume reduction (evaluable in nine patients) was 87% (range 12-99%). The rates of radiologically evident, symptomatic, and permanent radiation-induced changes were 58%, 25%, and 8%, respectively. There were no cases of post-SRS hemorrhage. VS-SRS substantially reduces the size of large AVMs. A potential role for VS-SRS may be to facilitate subsequent definitive intervention to obliterate a shrunken, residual nidus.
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Affiliation(s)
- Adeel Ilyas
- University of Virginia, School of Medicine, Charlottesville, VA 22908, United States
| | - Dale Ding
- University of Virginia, Department of Neurosurgery, Charlottesville, VA 22908, United States
| | - H Robert Hixson
- University of Virginia, Department of Radiology and Medical Imaging, Charlottesville, VA 22908, United States
| | - Zhiyuan Xu
- University of Virginia, Department of Neurosurgery, Charlottesville, VA 22908, United States
| | - Robert M Starke
- University of Virginia, Department of Neurosurgery, Charlottesville, VA 22908, United States; University of Miami, Department of Neurological Surgery, Miami, FL 33136, United States
| | - Jason P Sheehan
- University of Virginia, Department of Neurosurgery, Charlottesville, VA 22908, United States.
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Ding D, Starke RM, Crowley RW, Liu KC. Surgical Approaches for Symptomatic Cerebral Cavernous Malformations of the Thalamus and Brainstem. J Cerebrovasc Endovasc Neurosurg 2017; 19:19-35. [PMID: 28503485 PMCID: PMC5426196 DOI: 10.7461/jcen.2017.19.1.19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 01/04/2017] [Accepted: 02/18/2017] [Indexed: 11/27/2022] Open
Abstract
Objective Surgical resection of thalamic and brainstem cerebral cavernous malformations (CCMs) is associated with significant operative morbidity, but it may be outweighed, in some cases, by the neurological damage from recurrent hemorrhage in these eloquent areas. The goals of this retrospective cohort study are to describe the technical nuances of surgical approaches and determine the postoperative outcomes for CCMs of the thalamus and brainstem. Materials and Methods We reviewed an institutional database of patients harboring thalamic or brainstem CCMs, who underwent surgical resection from 2010 to 2014. The baseline and follow-up neuroimaging and clinical findings of each patient and the operative details of each case were evaluated. Results A total of eight patients, including two with thalamic and six with brainstem CCMs, were included in the study cohort. All patients had progressive neurological deterioration from recurrent CCM hemorrhage, and the median modified Rankin Scale (mRS) at presentation was 3. The median CCM maximum diameter and volume were 1.7 cm and 1.8 cm3, respectively. The thalamic CCMs were resected using the anterior transcallosal transchoroidal and supracerebellar infratentorial approaches each in one case (13%). The brainstem CCMs were resected using the retrosigmoid and suboccipital trans-cerebellomedullary fissure approaches each in three cases (38%). After a median follow-up of 11.5 months, all patients were neurologically stable or improved, with a median mRS of 2. The rate of functional independence (mRS 0-2) was 63%. Conclusion Microneurosurgical techniques and approaches can be safely and effectively employed for the management of thalamic and brainstem CCMs in appropriately selected patients.
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Affiliation(s)
- Dale Ding
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Robert M Starke
- Department of Neurological Surgery, University of Miami, Miami, FL, USA
| | - R Webster Crowley
- Department of Neurological Surgery, Rush University, Chicago, IL, USA
| | - Kenneth C Liu
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA.,Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
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Ma L, Kim H, Chen XL, Wu CX, Ma J, Su H, Zhao Y. Morbidity after Hemorrhage in Children with Untreated Brain Arteriovenous Malformation. Cerebrovasc Dis 2017; 43:231-241. [PMID: 28241126 DOI: 10.1159/000458731] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 02/01/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Children with untreated brain arteriovenous malformations (bAVM) are at risk of encountering life-threatening hemorrhage very early in their lives. The primary aim of invasive treatment is to reduce unfavorable outcome associated with a bAVM rupture. A better understanding of the morbidity of bAVM hemorrhage might be helpful for weighing the risks of untreated bAVM and invasive treatment. Our aim was to assess the clinical outcome after bAVM rupture and identify features to predict severe hemorrhage in children. METHODS We identified all consecutive children admitted to our institution for bAVMs between July 2009 and December 2014. Clinical outcome after hemorrhagic presentation and subsequent hemorrhage was evaluated using the modified Rankin Scale (mRS) for children. The association of demographic characteristics and bAVM morphology with severe hemorrhage (mRS >3 or requiring emergency hematoma evacuation) was studied using univariate and multivariable regression analyses. A nomogram based on multivariable analysis was formulated to predict severe hemorrhage risk for individual patients. RESULTS A total of 134 patients were identified with a mean treatment-free follow-up period of 2.1 years. bAVM ruptured in 83 (62%) children: 82 had a hemorrhage at presentation and 6 of them experienced a recurrent hemorrhage during follow-up; 1 patient had other diagnostic symptoms but bled during follow-up. Among them, 49% (41/83) had a severe hemorrhage; emergency hematoma evacuation was required in 28% of them (23/83), and 24% (20/83) remained as disabled (mRS ≥3) at last follow-up. Forty-six percent (38/82) of children with hemorrhagic presentation were severely disabled (mRS >3). Forty-three percent (3/7) were severely disabled after subsequent hemorrhage. The annual rate of severe subsequent hemorrhage was 1% in the overall cohort and 3.3% in children with ruptured presentation. All the subsequent severe hemorrhage events occurred in children with severe hemorrhage history (7%, 3/41). Periventricular location, non-temporal lobe location, and long draining vein were predictors for severe hemorrhage in pediatric untreated bAVMs. A nomogram based on bAVM morphology was contracted to predict severe hemorrhage risk for individual patients, which was well calibrated and had a good discriminative ability (adjusted C-statistic, 0.72). CONCLUSIONS Evaluating bAVM morbidity and morphology might be helpful for weighing the risks of untreated bAVM in pediatric patients.
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Affiliation(s)
- Li Ma
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China
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Ding D, Starke RM, Kano H, Mathieu D, Huang PP, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Silva D, Abbassy M, Missios S, Kondziolka D, Barnett GH, Dade Lunsford L, Sheehan JP. International multicenter cohort study of pediatric brain arteriovenous malformations. Part 1: Predictors of hemorrhagic presentation. J Neurosurg Pediatr 2017; 19:127-135. [PMID: 27911248 DOI: 10.3171/2016.9.peds16283] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Brain arteriovenous malformations (AVMs) are the most common cause of spontaneous intracranial hemorrhage in pediatric patients (age < 18 years). Since the cumulative lifetime risk of AVM hemorrhage is considerable in children, an improved understanding of the risk factors influencing hemorrhagic presentation may aid in the management of pediatric AVMs. The aims of this first of a 2-part multicenter, retrospective cohort study are to evaluate the incidence and determine the predictors of hemorrhagic presentation in pediatric AVM patients. METHODS The authors analyzed pooled AVM radiosurgery data from 7 institutions participating in the International Gamma Knife Research Foundation (IGKRF). Patients younger than 18 years at the time of radiosurgery and who had at least 12 months of follow-up were included in the study cohort. Patient and AVM characteristics were compared between unruptured and ruptured pediatric AVMs. RESULTS A total of 357 pediatric patients were eligible for analysis, including 112 patients in the unruptured and 245 patients in the ruptured AVM cohorts (69% incidence of hemorrhagic presentation). The annual hemorrhage rate prior to radiosurgery was 6.3%. Hemorrhagic presentation was significantly more common in deep locations (basal ganglia, thalamus, and brainstem) than in cortical locations (frontal, temporal, parietal, and occipital lobes) (76% vs 62%, p = 0.006). Among the factors found to be significantly associated with hemorrhagic presentation in the multivariate logistic regression analysis, deep venous drainage (OR 3.2, p < 0.001) was the strongest independent predictor, followed by female sex (OR 1.7, p = 0.042) and smaller AVM volume (OR 1.1, p < 0.001). CONCLUSIONS Unruptured and ruptured pediatric AVMs have significantly different patient and nidal features. Pediatric AVM patients who possess 1 or more of these high-risk features may be candidates for relatively more aggressive management strategies.
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Affiliation(s)
- Dale Ding
- University of Virginia, Department of Neurosurgery, Charlottesville, Virginia
| | - Robert M Starke
- University of Miami, Department of Neurological Surgery, Miami, Florida
| | - Hideyuki Kano
- University of Pittsburgh, Department of Neurological Surgery, Pittsburgh, Pennsylvania
| | - David Mathieu
- University of Sherbrooke, Division of Neurosurgery, Sherbrooke, Quebec, Canada; and
| | - Paul P Huang
- New York University Langone Medical Center, Department of Neurosurgery, New York, New York
| | - Caleb Feliciano
- University of Puerto Rico, Section of Neurological Surgery, San Juan, Puerto Rico
| | | | - Luis Almodovar
- University of Puerto Rico, Section of Neurological Surgery, San Juan, Puerto Rico
| | - Inga S Grills
- Beaumont Health System, Department of Radiation Oncology, Royal Oak, Michigan
| | - Danilo Silva
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - Mahmoud Abbassy
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - Symeon Missios
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - Douglas Kondziolka
- New York University Langone Medical Center, Department of Neurosurgery, New York, New York
| | - Gene H Barnett
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - L Dade Lunsford
- University of Pittsburgh, Department of Neurological Surgery, Pittsburgh, Pennsylvania
| | - Jason P Sheehan
- University of Virginia, Department of Neurosurgery, Charlottesville, Virginia
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Starke RM, Ding D, Kano H, Mathieu D, Huang PP, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Silva D, Abbassy M, Missios S, Kondziolka D, Barnett GH, Dade Lunsford L, Sheehan JP. International multicenter cohort study of pediatric brain arteriovenous malformations. Part 2: Outcomes after stereotactic radiosurgery. J Neurosurg Pediatr 2017; 19:136-148. [PMID: 27911249 DOI: 10.3171/2016.9.peds16284] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Pediatric patients (age < 18 years) harboring brain arteriovenous malformations (AVMs) are burdened with a considerably higher cumulative lifetime risk of hemorrhage than adults. Additionally, the pediatric population was excluded from recent prospective comparisons of intervention versus conservative management for unruptured AVMs. The aims of this multicenter, retrospective cohort study are to analyze the outcomes after stereotactic radiosurgery for unruptured and ruptured pediatric AVMs. METHODS We analyzed and pooled AVM radiosurgery data from 7 participating in the International Gamma Knife Research Foundation. Patients younger than 18 years of age who had at least 12 months of follow-up were included in the study cohort. Favorable outcome was defined as AVM obliteration, no post-radiosurgical hemorrhage, and no permanently symptomatic radiation-induced changes (RIC). The post-radiosurgery outcomes of unruptured versus ruptured pediatric AVMs were compared, and statistical analyses were performed to identify predictive factors. RESULTS The overall pediatric AVM cohort comprised 357 patients with a mean age of 12.6 years (range 2.8-17.9 years). AVMs were previously treated with embolization, resection, and fractionated external beam radiation therapy in 22%, 6%, and 13% of patients, respectively. The mean nidus volume was 3.5 cm3, 77% of AVMs were located in eloquent brain areas, and the Spetzler-Martin grade was III or higher in 59%. The mean radiosurgical margin dose was 21 Gy (range 5-35 Gy), and the mean follow-up was 92 months (range 12-266 months). AVM obliteration was achieved in 63%. During a cumulative latency period of 2748 years, the annual post-radiosurgery hemorrhage rate was 1.4%. Symptomatic and permanent radiation-induced changes occurred in 8% and 3%, respectively. Favorable outcome was achieved in 59%. In the multivariate logistic regression analysis, the absence of prior AVM embolization (p = 0.001) and higher margin dose (p < 0.001) were found to be independent predictors of a favorable outcome. The rates of favorable outcome for patients treated with a margin dose ≥ 22 Gy vs < 22 Gy were 78% (110/141 patients) and 47% (101/216 patients), respectively. A margin dose ≥ 22 Gy yielded a significantly higher probability of a favorable outcome (p < 0.001). The unruptured and ruptured pediatric AVM cohorts included 112 and 245 patients, respectively. Ruptured AVMs had significantly higher rates of obliteration (68% vs 53%, p = 0.005) and favorable outcome (63% vs 51%, p = 0.033), with a trend toward a higher incidence of post-radiosurgery hemorrhage (10% vs 4%, p = 0.07). The annual post-radiosurgery hemorrhage rates were 0.8% for unruptured and 1.6% for ruptured AVMs. CONCLUSIONS Radiosurgery is a reasonable treatment option for pediatric AVMs. Obliteration and favorable outcomes are achieved in the majority of patients. The annual rate of latency period hemorrhage after radiosurgery for both ruptured and unruptured pediatric AVM patients conveys a significant risk until the nidus is obliterated.
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Affiliation(s)
- Robert M Starke
- University of Miami, Department of Neurological Surgery, Miami, Florida
| | - Dale Ding
- University of Virginia, Department of Neurosurgery, Charlottesville, Virginia
| | - Hideyuki Kano
- University of Pittsburgh, Department of Neurological Surgery, Pittsburgh, Pennsylvania
| | - David Mathieu
- University of Sherbrooke, Division of Neurosurgery, Sherbrooke, Quebec, Canada; and
| | - Paul P Huang
- New York University Langone Medical Center, Department of Neurosurgery, New York, New York
| | - Caleb Feliciano
- University of Puerto Rico, Section of Neurological Surgery, San Juan, Puerto Rico
| | | | - Luis Almodovar
- University of Puerto Rico, Section of Neurological Surgery, San Juan, Puerto Rico
| | - Inga S Grills
- Beaumont Health System, Department of Radiation Oncology, Royal Oak, Michigan
| | - Danilo Silva
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - Mahmoud Abbassy
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - Symeon Missios
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - Douglas Kondziolka
- New York University Langone Medical Center, Department of Neurosurgery, New York, New York
| | - Gene H Barnett
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio
| | - L Dade Lunsford
- University of Pittsburgh, Department of Neurological Surgery, Pittsburgh, Pennsylvania
| | - Jason P Sheehan
- University of Virginia, Department of Neurosurgery, Charlottesville, Virginia
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Ding D, Starke RM, Sheehan JP. Radiosurgery for the management of cerebral arteriovenous malformations. HANDBOOK OF CLINICAL NEUROLOGY 2017; 143:69-83. [PMID: 28552160 DOI: 10.1016/b978-0-444-63640-9.00007-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cerebral arteriovenous malformations (AVMs) are rare, unstable vascular lesions which spontaneously rupture at a rate of approximately 2-4% annually. Stereotactic radiosurgery is a minimally invasive treatment for AVMs, with a favorable risk-to-benefit profile in most patients, with respect to obliteration, hemorrhage, and seizure control. Radiosurgery is ideally suited for small to medium-sized AVMs (diameter <3cm or volume <12cm3) located in deep or eloquent brain regions. Obliteration is ultimately achieved in 70-80% of cases and is directly associated with nidus volume and radiosurgical margin dose. Adverse radiation effects, which appear as T2-weighted hyperintensities on magnetic resonance imaging, develop in 30-40% of patients after AVM radiosurgery, are symptomatic in 10%, and fail to clinically resolve in 2-3%. The risk of AVM hemorrhage may be reduced by radiosurgery, but the hemorrhage risk persists during the latency period between treatment and obliteration. Delayed postradiosurgery cyst formation occurs in 2% of cases and may require surgical treatment. Radiosurgery abolishes or ameliorates seizure activity in the majority of patients with AVM-associated epilepsy and induces de novo seizures in 1-2% of those without preoperative seizures. Strategies for the treatment of large-volume AVMs include neoadjuvant embolization and either dose- or volume-staged radiosurgery.
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Affiliation(s)
- Dale Ding
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Robert M Starke
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Jason P Sheehan
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA.
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Starke RM, Kano H, Ding D, Lee JYK, Mathieu D, Whitesell J, Pierce JT, Huang PP, Kondziolka D, Yen CP, Feliciano C, Rodgriguez-Mercado R, Almodovar L, Pieper DR, Grills IS, Silva D, Abbassy M, Missios S, Barnett GH, Lunsford LD, Sheehan JP. Stereotactic radiosurgery for cerebral arteriovenous malformations: evaluation of long-term outcomes in a multicenter cohort. J Neurosurg 2017; 126:36-44. [DOI: 10.3171/2015.9.jns151311] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE
In this multicenter study, the authors reviewed the results following Gamma Knife radiosurgery (GKRS) of cerebral arteriovenous malformations (AVMs), determined predictors of outcome, and assessed predictive value of commonly used grading scales based upon this large cohort with long-term follow-up.
METHODS
Data from a cohort of 2236 patients undergoing GKRS for cerebral AVMs were compiled from the International Gamma Knife Research Foundation. Favorable outcome was defined as AVM obliteration and no posttreatment hemorrhage or permanent symptomatic radiation-induced complications. Patient and AVM characteristics were assessed to determine predictors of outcome, and commonly used grading scales were assessed.
RESULTS
The mean maximum AVM diameter was 2.3 cm, with a mean volume of 4.3 cm3. A mean margin dose of 20.5 Gy was delivered. Mean follow-up was 7 years (range 1–20 years). Overall obliteration was 64.7%. Post-GRKS hemorrhage occurred in 165 patients (annual risk 1.1%). Radiation-induced imaging changes occurred in 29.2%; 9.7% were symptomatic, and 2.7% had permanent deficits. Favorable outcome was achieved in 60.3% of patients. Patients with prior nidal embolization (OR 2.1, p < 0.001), prior AVM hemorrhage (OR 1.3, p = 0.007), eloquent location (OR 1.3, p = 0.029), higher volume (OR 1.01, p < 0.001), lower margin dose (OR 0.9, p < 0.001), and more isocenters (OR 1.1, p = 0.011) were more likely to have unfavorable outcomes in multivariate analysis. The Spetzler-Martin grade and radiosurgery-based AVM score predicted outcome, but the Virginia Radiosurgery AVM Scale provided the best assessment.
CONCLUSIONS
GKRS for cerebral AVMs achieves obliteration and avoids permanent complications in the majority of patients. Patient, AVM, and treatment parameters can be used to predict long-term outcomes following radiosurgery.
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Affiliation(s)
- Robert M. Starke
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Hideyuki Kano
- 2Department of Neurosurgery, University of Pittsburgh
| | - Dale Ding
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - John Y. K. Lee
- 3Gamma Knife Center, University of Pennsylvania, Philadelphia, Pennsylvania
| | - David Mathieu
- 4Department of Neurosurgery, University of Sherbrooke, Quebec, Canada
| | - Jamie Whitesell
- 3Gamma Knife Center, University of Pennsylvania, Philadelphia, Pennsylvania
| | - John T. Pierce
- 3Gamma Knife Center, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Paul P. Huang
- 5Gamma Knife Center, New York University, New York, New York
| | | | - Chun-Po Yen
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Caleb Feliciano
- 6Department of Neurosurgery, University of Puerto Rico, San Juan, Puerto Rico
| | | | - Luis Almodovar
- 6Department of Neurosurgery, University of Puerto Rico, San Juan, Puerto Rico
| | - Daniel R. Pieper
- 7Gamma Knife Center, Beaumont Health System, Royal Oak, Michigan; and
| | - Inga S. Grills
- 7Gamma Knife Center, Beaumont Health System, Royal Oak, Michigan; and
| | - Danilo Silva
- 8Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Mahmoud Abbassy
- 8Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Symeon Missios
- 8Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Gene H. Barnett
- 8Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | | | - Jason P. Sheehan
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
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Ding D, Xu Z, Shih HH, Starke RM, Yen CP, Cohen-Inbar O, Sheehan JP. Worse Outcomes After Repeat vs Initial Stereotactic Radiosurgery for Cerebral Arteriovenous Malformations. Neurosurgery 2016; 79:690-700. [DOI: 10.1227/neu.0000000000001409] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Abstract
BACKGROUND:
Incompletely obliterated cerebral arteriovenous malformations (AVMs) after initial treatment with stereotactic radiosurgery (SRS) can be treated with a repeat session of SRS. However, the relative efficacy of repeat vs initial SRS is not well specified.
OBJECTIVE:
To retrospectively compare in matched cohorts the outcomes of repeat vs initial SRS for the treatment of matched cohorts with angioarchitecturally similar AVMs.
METHODS:
We studied a data set of patients with AVM treated with radiosurgery during the period spanning 1989 to 2013. Patients with AVM who underwent repeat SRS with radiologic follow-up of ≥2 years or nidus obliteration were identified for the study and matched, in a 1:1 fashion that was blinded to outcome, to patients with previously untreated AVMs who underwent initial SRS. Statistical analyses were performed to compare the outcomes after repeat vs initial SRS.
RESULTS:
The matching approach resulted in 84 patients for the repeat and the initial SRS cohort (mean margin doses, 20.7 and 20.9 Gy, respectively; P =.74). In the repeat SRS cohort, obliteration was achieved in 67%; the radiologic, symptomatic, and permanent radiation-induced change rates were 35%, 10%, and 4%, respectively; and the post-SRS hemorrhage rate was 3.1%/y. Compared with the initial SRS cohort, the repeat SRS cohort had significantly lower obliteration rates (P =.04) and higher post-SRS hemorrhage rates (P =.04). The radiation-induced change rates of the 2 cohorts were not significantly different.
CONCLUSION:
Repeat SRS yields considerably poorer outcomes than initial SRS for angioarchitecturally comparable AVMs. Further studies in AVM radiobiology and vascular structure are necessary to elucidate this potentially differential response.
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Affiliation(s)
- Dale Ding
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Zhiyuan Xu
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Han-Hsun Shih
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Robert M. Starke
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Chun-Po Yen
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Or Cohen-Inbar
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
| | - Jason P. Sheehan
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
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Conger JR, Ding D, Raper DM, Starke RM, Durst CR, Liu KC, Jensen ME, Evans AJ. Preoperative Embolization of Cerebral Arteriovenous Malformations with Silk Suture and Particles: Technical Considerations and Outcomes. J Cerebrovasc Endovasc Neurosurg 2016; 18:90-99. [PMID: 27790398 PMCID: PMC5081503 DOI: 10.7461/jcen.2016.18.2.90] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 03/25/2016] [Accepted: 05/30/2016] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Embolization of cerebral arteriovenous malformations (AVMs) is commonly performed prior to surgical resection in order to reduce intraoperative bleeding and improve the safety of resection. Although most modern embolization procedures utilize permanent embolic agents, silk suture and polyvinyl alcohol (PVA) particles may offer unique advantages for preoperative devascularization. The aims of this retrospective cohort study are to describe the technical considerations and determine the outcomes for preoperative silk suture and PVA particle embolization (SPE) of AVMs. MATERIALS AND METHODS We performed a retrospective review of our AVM embolization database. AVM patients who underwent preoperative SPE and subsequent surgical resection were included for analysis. Baseline patient demographics, AVM characteristics, embolization and operative records, and post-treatment outcomes were reviewed. RESULTS A total of 11 patients who underwent 12 preoperative SPE procedures were included for analysis. Five AVMs were ruptured (45%), and the median nidus volume was 3.0 cm3 (range: 1.3-42.9 cm3). The Spetzler-Martin grade was I-II in seven patients (64%) and III-IV in four patients (36%). The degree of nidal obliteration was less than 25% in two procedures (17%), 25-50% in one procedure (8%), 50-75% in eight procedures (67%), and greater than 75% in one procedure (8%). The rates of post-embolization AVM hemorrhage and mortality were 8% and 0%, respectively. The postoperative angiographic obliteration rate was 100%, and the modified Rankin Scale score improved or stable in 91% of patients (median follow-up duration 2 months). CONCLUSION Preoperative AVM SPE affords a reasonable risk to benefit profile for appropriately selected patients.
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Affiliation(s)
- Jordan R Conger
- School of Medicine, University of Virginia, Charlottesville, VA, USA
| | - Dale Ding
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Daniel M Raper
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Robert M Starke
- Department of Neurological Surgery, University of Miami, Miami, FL, USA
| | - Christopher R Durst
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
| | - Kenneth C Liu
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA.; Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
| | - Mary E Jensen
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
| | - Avery J Evans
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
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Ding D, Starke RM, Liu KC, Crowley RW. Cortical plasticity in patients with cerebral arteriovenous malformations. J Clin Neurosci 2016; 22:1857-61. [PMID: 26256067 DOI: 10.1016/j.jocn.2015.06.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 06/20/2015] [Indexed: 10/22/2022]
Abstract
The aim of this review is to ascertain the evidence for cortical plasticity in arteriovenous malformation (AVM) patients. Chronic hypoperfusion due to vascular steal from cerebral AVM can result in a translocation of eloquent neurological functions to other brain areas, a phenomenon known as cortical plasticity. We performed a systematic literature review of the studies that have evaluated cortical plasticity in AVM patients. A total of 22 studies from 1996 to 2014 were included for the analyses. The evaluation of cortical plasticity was performed prior to AVM intervention in 109 patients, and during or after AVM intervention in 18. The most commonly assessed neurological functions were motor in 85% and language in 11% of the former cohort, and motor in 78% and language, cognition, and memory each in 39% of the latter cohort. Functional MRI was the most frequently used method for evaluating cortical plasticity, and was performed in 63% of the former and 56% of the latter cohort. In conclusion, cortical plasticity appears to be influenced by both AVM pathogenesis and intervention. Given the limited evidence that is currently available for cortical plasticity in AVM patients, further studies are warranted to determine its incidence and impact on long term clinical outcomes.
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Affiliation(s)
- Dale Ding
- Department of Neurosurgery, University of Virginia, Post Office Box 800212, Charlottesville, VA 22908, USA.
| | - Robert M Starke
- Department of Neurosurgery, University of Virginia, Post Office Box 800212, Charlottesville, VA 22908, USA
| | - Kenneth C Liu
- Department of Neurosurgery, University of Virginia, Post Office Box 800212, Charlottesville, VA 22908, USA; Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
| | - R Webster Crowley
- Department of Neurosurgery, University of Virginia, Post Office Box 800212, Charlottesville, VA 22908, USA; Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA
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Ding D, Starke RM, Kano H, Lee JYK, Mathieu D, Pierce J, Huang PP, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Silva D, Abbassy M, Missios S, Kondziolka D, Barnett GH, Lunsford LD, Sheehan JP. Stereotactic radiosurgery for Spetzler-Martin Grade III arteriovenous malformations: an international multicenter study. J Neurosurg 2016; 126:859-871. [PMID: 27081906 DOI: 10.3171/2016.1.jns152564] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Because of the angioarchitectural diversity of Spetzler-Martin (SM) Grade III arteriovenous malformations (AVMs), the management of these lesions is incompletely defined. The aims of this multicenter, retrospective cohort study were to evaluate the outcomes after stereotactic radiosurgery (SRS) for SM Grade III AVMs and to determine the factors predicting these outcomes. METHODS The authors analyzed and pooled data from patients with SM Grade III AVMs treated with SRS at 8 institutions participating in the International Gamma Knife Research Foundation. Patients with these AVMs and a minimum follow-up length of 12 months were included in the study cohort. An optimal outcome was defined as AVM obliteration, no post-SRS hemorrhage, and no permanently symptomatic radiation-induced changes (RICs). Data were analyzed by univariate and multivariate regression analyses. RESULTS The SM Grade III AVM cohort comprised 891 patients with a mean age of 34 years at the time of SRS. The mean nidus volume, radiosurgical margin dose, and follow-up length were 4.5 cm3, 20 Gy, and 89 months, respectively. The actuarial obliteration rates at 5 and 10 years were 63% and 78%, respectively. The annual postradiosurgery hemorrhage rate was 1.2%. Symptomatic and permanent RICs were observed in 11% and 4% of the patients, respectively. Optimal outcome was achieved in 56% of the patients and was significantly more frequent in cases of unruptured AVMs (OR 2.3, p < 0.001). The lack of a previous hemorrhage (p = 0.037), absence of previous AVM embolization (p = 0.002), smaller nidus volume (p = 0.014), absence of AVM-associated arterial aneurysms (p = 0.023), and higher margin dose (p < 0.001) were statistically significant independent predictors of optimal outcome in a multivariate analysis. CONCLUSIONS Stereotactic radiosurgery provided better outcomes for patients with small, unruptured SM Grade III AVMs than for large or ruptured SM Grade III nidi. A prospective trial or registry that facilitates a comparison of SRS with conservative AVM management might further clarify the authors' observations for these often high-risk AVMs.
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Affiliation(s)
- Dale Ding
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Robert M Starke
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
| | - Hideyuki Kano
- Department of Neurological Surgery, University of Pittsburgh, and
| | - John Y K Lee
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - David Mathieu
- Division of Neurosurgery, University of Sherbrooke, Centre de recherché du CHUS, Sherbrooke, Quebec, Canada
| | - John Pierce
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Paul P Huang
- Department of Neurosurgery, NYU Langone Medical Center, New York, New York
| | - Caleb Feliciano
- Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico
| | | | - Luis Almodovar
- Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico
| | | | - Danilo Silva
- Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Mahmoud Abbassy
- Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Symeon Missios
- Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Douglas Kondziolka
- Department of Neurosurgery, NYU Langone Medical Center, New York, New York
| | - Gene H Barnett
- Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - L Dade Lunsford
- Department of Neurological Surgery, University of Pittsburgh, and
| | - Jason P Sheehan
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia
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Oermann EK, Ding D, Yen CP, Starke RM, Bederson JB, Kondziolka D, Sheehan JP. Effect of Prior Embolization on Cerebral Arteriovenous Malformation Radiosurgery Outcomes: A Case-Control Study. Neurosurgery 2016; 77:406-17; discussion 417. [PMID: 25875580 DOI: 10.1227/neu.0000000000000772] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Embolization before stereotactic radiosurgery (SRS) for cerebral arteriovenous malformations (AVM) has been shown to negatively affect obliteration rates, but its impact on the risks of radiosurgery-induced complications and latency period hemorrhage is poorly defined. OBJECTIVE To determine, in a case-control study, the effect of prior embolization on AVM SRS outcomes. METHODS We evaluated a database of AVM patients who underwent SRS. Propensity score analysis was used to match the case (embolized nidi) and control (nonembolized nidi) cohorts. AVM angioarchitectural complexity was defined as the sum of the number of major feeding arteries and draining veins to the nidus. Multivariate Cox proportional hazards regression analyses were performed on the overall study population to determine independent predictors of obliteration and radiation-induced changes. RESULTS The matching process yielded 242 patients in each cohort. The actuarial obliteration rates were significantly lower in the embolized (31%, 49% at 5, 10 years, respectively) compared with the nonembolized (48%, 64% at 5, 10 years, respectively) cohort (P = .003). In the multivariate analysis for obliteration, lower angioarchitectural complexity (P < .001) and radiologically evident radiation-induced changes (P = .016) were independent predictors, but embolization was not significant (P = .744). In the multivariate analysis for radiologic radiation-induced changes, lack of prior embolization (P = .009) and fewer draining veins (P = .011) were independent predictors. CONCLUSION The effect of prior embolization on AVM obliteration after SRS may be significantly confounded by nidus angioarchitectural complexity. Additionally, embolization could reduce the risk of radiation-induced changes. Thus, combined embolization and SRS may be warranted for appropriately selected nidi.
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Affiliation(s)
- Eric K Oermann
- *Mount Sinai Health System, Department of Neurosurgery, New York City, New York; ‡University of Virginia, Department of Neurosurgery, Charlottesville, Virginia; §New York University Langone Medical Center, Department of Neurosurgery, New York City, New York
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Ding D, Xu Z, Starke RM, Yen CP, Shih HH, Buell TJ, Sheehan JP. Radiosurgery for Cerebral Arteriovenous Malformations with Associated Arterial Aneurysms. World Neurosurg 2016; 87:77-90. [DOI: 10.1016/j.wneu.2015.11.080] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 01/08/2023]
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Cohen-Inbar O, Ding D, Chen CJ, Sheehan JP. Stereotactic radiosurgery for deep intracranial arteriovenous malformations, part 1: Brainstem arteriovenous malformations. J Clin Neurosci 2016; 24:30-6. [DOI: 10.1016/j.jocn.2015.11.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 11/21/2015] [Indexed: 11/30/2022]
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Stereotactic Radiosurgery for Partially Resected Cerebral Arteriovenous Malformations. World Neurosurg 2016; 85:263-72. [DOI: 10.1016/j.wneu.2015.10.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 09/29/2015] [Accepted: 10/01/2015] [Indexed: 11/20/2022]
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48
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Ding D, Starke RM, Kano H, Mathieu D, Huang P, Kondziolka D, Feliciano C, Rodriguez-Mercado R, Almodovar L, Grills IS, Silva D, Abbassy M, Missios S, Barnett GH, Lunsford LD, Sheehan JP. Radiosurgery for Cerebral Arteriovenous Malformations in A Randomized Trial of Unruptured Brain Arteriovenous Malformations (ARUBA)-Eligible Patients: A Multicenter Study. Stroke 2015; 47:342-9. [PMID: 26658441 DOI: 10.1161/strokeaha.115.011400] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 11/05/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE The benefit of intervention for patients with unruptured cerebral arteriovenous malformations (AVMs) was challenged by results demonstrating superior clinical outcomes with conservative management from A Randomized Trial of Unruptured Brain AVMs (ARUBA). The aim of this multicenter, retrospective cohort study is to analyze the outcomes of stereotactic radiosurgery for ARUBA-eligible patients. METHODS We combined AVM radiosurgery outcome data from 7 institutions participating in the International Gamma Knife Research Foundation. Patients with ≥12 months of follow-up were screened for ARUBA eligibility criteria. Favorable outcome was defined as AVM obliteration, no postradiosurgery hemorrhage, and no permanently symptomatic radiation-induced changes. Adverse neurological outcome was defined as any new or worsening neurological symptoms or death. RESULTS The ARUBA-eligible cohort comprised 509 patients (mean age, 40 years). The Spetzler-Martin grade was I to II in 46% and III to IV in 54%. The mean radiosurgical margin dose was 22 Gy and follow-up was 86 months. AVM obliteration was achieved in 75%. The postradiosurgery hemorrhage rate during the latency period was 0.9% per year. Symptomatic and permanent radiation-induced changes occurred in 11% and 3%, respectively. The rates of favorable outcome, adverse neurological outcome, permanent neurological morbidity, and mortality were 70%, 13%, 5%, and 4%, respectively. CONCLUSIONS Radiosurgery may provide durable clinical benefit in some ARUBA-eligible patients. On the basis of the natural history of untreated, unruptured AVMs in the medical arm of ARUBA, we estimate that a follow-up duration of 15 to 20 years is necessary to realize a potential benefit of radiosurgical intervention for conservative management in unruptured patients with AVM.
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Affiliation(s)
- Dale Ding
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Robert M Starke
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Hideyuki Kano
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - David Mathieu
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Paul Huang
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Douglas Kondziolka
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Caleb Feliciano
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Rafael Rodriguez-Mercado
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Luis Almodovar
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Inga S Grills
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Danilo Silva
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Mahmoud Abbassy
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Symeon Missios
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Gene H Barnett
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - L Dade Lunsford
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
| | - Jason P Sheehan
- From the Department of Neurosurgery, University of Virginia, Charlottesville (D.D., R.M.S., J.P.S.); Department of Neurological Surgery, University of Pittsburgh, PA (H.K., L.D.L.); Division of Neurosurgery, Centre de recherché du CHUS, University of Sherbrooke, Sherbrooke, Quebec, Canada (D.M.); Department of Neurosurgery, New York University Langone Medical Center (P.H., D.K.); Section of Neurological Surgery, University of Puerto Rico, San Juan, Puerto Rico (C.F., R.R.-M., L.A.); Department of Radiation Oncology, Beaumont Health System, Royal Oak, MI (I.S.G.); and Department of Neurosurgery, Cleveland Clinic Foundation, OH (D.S., M.A., S.M., G.H.B.)
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Ding D. Stereotactic radiosurgery versus surgical resection for the management of intracranial meningiomas in elderly patients. Acta Neurochir (Wien) 2015; 157:2205-7. [PMID: 26392116 DOI: 10.1007/s00701-015-2589-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Accepted: 09/10/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Dale Ding
- Department of Neurosurgery, University of Virginia, PO Box 800212, Charlottesville, VA, 22908, USA. .,Department of Neurosurgery, Auckland City Hospital, Auckland, 1010, New Zealand.
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Cerebral Arteriovenous Malformations and Epilepsy, Part 2: Predictors of Seizure Outcomes Following Radiosurgery. World Neurosurg 2015; 84:653-62. [DOI: 10.1016/j.wneu.2015.04.064] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/23/2015] [Accepted: 04/23/2015] [Indexed: 11/23/2022]
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