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Beslow LA, White AJ, Krings T, Hammill AM, Lang SS, Baba A, Clancy MS, Olitsky SE, Hetts SW. Current Practice: Rationale for Screening Children with Hereditary Hemorrhagic Telangiectasia for Brain Vascular Malformations. AJNR Am J Neuroradiol 2024; 45:1177-1184. [PMID: 38816017 PMCID: PMC11392374 DOI: 10.3174/ajnr.a8195] [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: 11/21/2023] [Accepted: 01/08/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND Hereditary hemorrhagic telangiectasia is an autosomal dominant vascular dysplasia characterized by mucocutaneous telangiectasias, recurrent epistaxis, and organ vascular malformations including in the brain, which occur in about 10% of patients. These brain vascular malformations include high-flow AVMs and AVFs as well as low-flow capillary malformations. High-flow lesions can rupture, causing neurologic morbidity and mortality. STATE OF PRACTICE International guidelines for the diagnosis and management of hereditary hemorrhagic telangiectasia recommend screening children for brain vascular malformations with contrast enhanced MR imaging at hereditary hemorrhagic telangiectasia diagnosis. Screening has not been uniformly adopted by some practitioners who contend that screening is not justified. Arguments against screening include application of short-term data from the adult A Randomized Trial of Unruptured Brain Arteriovenous Malformations (ARUBA) trial of unruptured sporadic brain AVMs to children with hereditary hemorrhagic telangiectasia as well as concerns about administration of sedation or IV contrast and causing patients or families increased anxiety. ANALYSIS In this article, a multidisciplinary group of experts on hereditary hemorrhagic telangiectasia reviewed data that support screening guidelines and counter arguments against screening. Children with hereditary hemorrhagic telangiectasia have a preponderance of high-flow lesions including AVFs, which have the highest rupture risk. The rupture risk among children is estimated at about 0.7% per lesion per year and is additive across lesions and during a lifetime. ARUBA, an adult clinical trial of expectant medical management versus treatment of unruptured brain AVMs, favored medical management at 5 years but is not applicable to pediatric patients with hereditary hemorrhagic telangiectasia given the life expectancy of a child. Additionally, interventional, radiosurgical, and surgical techniques have improved with time. Experienced neurovascular experts can prospectively determine the best treatment for each child on the basis of local resources. The "watch and wait" approach to imaging means that children with brain vascular malformations will not be identified until a potentially life-threatening and deficit-producing intracerebral hemorrhage occurs. This expert group does not deem this to be an acceptable trade-off.
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Affiliation(s)
- Lauren A Beslow
- From the Division of Neurology (L.A.B.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Departments of Neurology and Pediatrics (L.A.B.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Andrew J White
- Department of Pediatrics (A.J.W.), St. Louis University School of Medicine, St. Louis, Missouri
| | - Timo Krings
- Division of Neuroradiology (T.K.), Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | - Adrienne M Hammill
- Cancer and Blood Diseases Institute (A.M.H.), Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- Division of Pediatrics (A.M.H.), University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Shih Shan Lang
- Division of Neurosurgery (S.S.L.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Neurosurgery (S.S.L.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Atsuko Baba
- Department of Anesthesia (A.B.), University of California San Francisco, San Francisco, California
| | | | | | - Steven W Hetts
- Departments of Radiology & Biomedical Imaging and Neurological Surgery and Division of Neuroendovascular Surgery (S.W.H.), University of California San Francisco, San Francisco, California
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Miron I, Prună VM, Visarion D, Giovani A, Sandu AM, Brehar FM, Petrescu GED, Gorgan RM. Clinical outcomes of posterior fossa arteriovenous malformations: a single center experience. Acta Neurochir (Wien) 2024; 166:215. [PMID: 38744729 PMCID: PMC11093870 DOI: 10.1007/s00701-024-06116-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 05/05/2024] [Indexed: 05/16/2024]
Abstract
BACKGROUND Posterior fossa arterio-venous malformations (pfAVMs) are challenging lesions due to the anatomical particularities of the posterior fossa, and the high incidence of hemorrhagic presentation. The two most important goals when treating AVMs are preserving neurological function and preventing rupture, or a second hemorrhage. The aim of this study was to analyze the clinical and imaging features of pfAVMs to identify the factors that influence the prognosis of these patients. METHODS We conducted a single-center retrospective observational study that included patients treated at our institution with pfAVMs between January 1997 and December 2021. RESULTS A total of 48 patients were included. A good modified Rankin score (mRS) was observed in 33 cases (69%) at presentation. Thirty-four patients (71%) presented with a ruptured AVM. Out of these, 19 patients (40%) had intraventricular hemorrhage. Microsurgical resection was performed in 33 cases (69%), while in the other cases, the patients opted for conservative management (7 cases, 15%), stereotactic radiosurgery (SRS) (6 cases, 12%), or endovascular treatment (2 cases, 4%). Patients ≤ 30 years old were more prone to hemorrhagic presentation (OR: 5.23; 95% CI: 1.42-17.19; p = 0.024) and this remained an independent risk factor for rupture after multivariate analysis as well (OR: 4.81; 95% CI: 1.07-21.53; p = 0.040). Following multivariate analysis, the only factor independently associated with poor prognosis in the surgically treated subgroup was a poor clinical status (mRS 3-5) at admission (OR: 96.14; 95% CI: 5.15-1793.9; p = 0.002). CONCLUSIONS Management of posterior fossa AVMs is challenging, and patients who present with ruptured AVMs often have a poor clinical status at admission leading to a poor prognosis. Therefore, proper and timely management of these patients is essential.
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Affiliation(s)
- Ioana Miron
- Department of Neurosurgery, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
| | - Viorel M Prună
- Department of Neurosurgery, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
| | - Dan Visarion
- Department of Neurosurgery, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
| | - Andrei Giovani
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
| | - Aurelia M Sandu
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
| | - Felix M Brehar
- Department of Neurosurgery, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
| | - George E D Petrescu
- Department of Neurosurgery, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania.
| | - Radu M Gorgan
- Department of Neurosurgery, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Neurosurgery, Bagdasar-Arseni Clinical Emergency Hospital, Bucharest, Romania
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Tang W, Chen Y, Ma L, Chen Y, Yang B, Li R, Li Z, Wu Y, Wang X, Guo X, Zhang W, Chen X, Lv M, Zhao Y, Guo G. Current perspectives and trends in the treatment of brain arteriovenous malformations: a review and bibliometric analysis. Front Neurol 2024; 14:1327915. [PMID: 38274874 PMCID: PMC10808838 DOI: 10.3389/fneur.2023.1327915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
Background Currently, there is a lack of intuitive analysis regarding the development trend, main authors, and research hotspots in the field of cerebral arteriovenous malformation treatment, as well as a detailed elaboration of possible research hotspots. Methods A bibliometric analysis was conducted on data retrieved from the Web of Science core collection database between 2000 and 2022. The analysis was performed using R, VOSviewer, CiteSpace software, and an online bibliometric platform. Results A total of 1,356 articles were collected, and the number of publications has increased over time. The United States and the University of Pittsburgh are the most prolific countries and institutions in the field. The top three cited authors are Kondziolka D, Sheehan JP, and Lunsford LD. The Journal of Neurosurgery and Neurosurgery are two of the most influential journals in the field of brain arteriovenous malformation treatment research, with higher H-index, total citations, and number of publications. Furthermore, the analysis of keywords indicates that "aruba trial," "randomised trial," "microsurgery," "onyx embolization," and "Spetzler-Martin grade" may become research focal points. Additionally, this paper discusses the current research status, existing issues, and potential future research directions for the treatment of brain arteriovenous malformations. Conclusion This bibliometric study comprehensively analyses the publication trend of cerebral arteriovenous malformation treatment in the past 20 years. It covers the trend of international cooperation, publications, and research hotspots. This information provides an important reference for scholars to further study cerebral arteriovenous malformation.
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Affiliation(s)
- Weixia Tang
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yang Chen
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
| | - Li Ma
- Department of Neurological Surgery, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Yu Chen
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Biao Yang
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
| | - Ren Li
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ziao Li
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
| | - Yongqiang Wu
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
- Department of Emergency, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiaogang Wang
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
| | - Xiaolong Guo
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
| | - Wenju Zhang
- Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
| | - Xiaolin Chen
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Ming Lv
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Yuanli Zhao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Geng Guo
- Shanxi Provincial Clinical Research Center for Interventional Medicine, Taiyuan, Shanxi, China
- Department of Emergency, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
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Abstract
Brain arteriovenous malformation (bAVM) is the most common cause of intracranial hemorrhage (ICH), particularly in young patients. However, the exact cause of bAVM bleeding and rupture is not yet fully understood. In bAVMs, blood bypasses the entire capillary bed and directly flows from arteries to veins. The vessel walls in bAVMs have structural defects, which impair vascular integrity. Mural cells are essential structural and functional components of blood vessels and play a critical role in maintaining vascular integrity. Changes in mural cell number and coverage have been implicated in bAVMs. In this review, we discussed the roles of mural cells in bAVM pathogenesis. We focused on 1) the recent advances in human and animal studies of bAVMs; 2) the importance of mural cells in vascular integrity; 3) the regulatory signaling pathways that regulate mural cell function. More specifically, the platelet-derived growth factor-B (PDGF-B)/PDGF receptor-β (PDGFR-β), EphrinB2/EphB4, and angiopoietins/tie2 signaling pathways that regulate mural cell-recruitment during vascular remodeling were discussed in detail.
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Frisoli FA, Catapano JS, Farhadi DS, Cadigan MS, Nguyen CL, Labib MA, Srinivasan VM, Lawton MT. Spetzler-Martin Grade III Arteriovenous Malformations: A Comparison of Modified and Supplemented Spetzler-Martin Grading Systems. Neurosurgery 2021; 88:1103-1110. [PMID: 33582762 DOI: 10.1093/neuros/nyab020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/27/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The modified Spetzler-Martin (SM) grading system proposes that grade III arteriovenous malformation (AVM) subtypes are associated with variable microsurgical risks, with small AVMs (III-) having lower risk and medium/eloquent AVMs (III+) having higher risk. Adding patient age and AVM bleeding status and compactness to the SM grade produces a score - the supplemented SM (Supp-SM) grade - to more accurately assess preoperative risk. OBJECTIVE To compare the predictive power of the modified SM and Supp-SM grades for risk assessment in patients with grade III AVMs. METHODS Patients with SM grade III AVMs treated between 2011 and 2018 were retrospectively reviewed. Good outcomes were defined as modified Rankin Scale (mRS) scores ≤ 2 or unchanged/improved mRS scores (pre- vs postsurgery). RESULTS Of 102 patients with SM grade III AVMs, 59% had grade III- and 24% had grade III+ AVMs. Supp SM grade 6 and grade 7 AVMs accounted for 44% and 24%, respectively. Overall, 33% of patients worsened but outcomes did not significantly differ by SM III subtype. Neurological outcomes were associated with Supp-SM grade, with proportions of patients with worsening increasing from 0% with Supp-SM grade 4 AVMs to 54% with Supp-SM grade 7 AVMs. Analyses of factors associated with neurological worsening identified age > 60 yr and Supp-SM grade 7 as significant. CONCLUSION Supp-SM grades were more predictive of microsurgical outcomes than modified SM grades for grade III AVMs, with a hard cutoff for acceptable surgical risk at Supp-SM grade 6. Supp-SM grading is a better decision-making tool than subtyping with the modified SM scale.
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Affiliation(s)
- Fabio A Frisoli
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Joshua S Catapano
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Dara S Farhadi
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Megan S Cadigan
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Candice L Nguyen
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Mohamed A Labib
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Visish M Srinivasan
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Michael T Lawton
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
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Catapano JS, Frisoli FA, Nguyen CL, Labib MA, Cole TS, Baranoski JF, Kim H, Spetzler RF, Lawton MT. Intermediate-grade brain arteriovenous malformations and the boundary of operability using the supplemented Spetzler-Martin grading system. J Neurosurg 2021; 136:125-133. [PMID: 34171830 DOI: 10.3171/2020.11.jns203298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/06/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Supplemented Spetzler-Martin grading (Supp-SM), which is the combination of Spetzler-Martin and Lawton-Young grades, was validated as being more accurate than stand-alone Spetzler-Martin grading, but an operability cutoff was not established. In this study, the authors surgically treated intermediate-grade AVMs to provide prognostic factors for neurological outcomes and to define AVMs at the boundary of operability. METHODS Surgically treated Supp-SM intermediate-grade (5, 6, and 7) AVMs were analyzed from 2011 to 2018 at two medical centers. Worsened neurological outcomes were defined as increased modified Rankin Scale (mRS) scores on postoperative examinations. A second analysis of 2000-2011 data for Supp-SM grade 6 and 7 AVMs was performed to determine the subtypes with improved or unchanged outcomes. Patients were separated into three groups based on nidus size (S1: < 3 cm, S2: 3-6 cm, S3: > 6 cm) and age (A1: < 20 years, A2: 20-40 years, A3: > 40 years), followed by any combination of the combined supplemented grade: low risk (S1A1, S1A2, S2A1), intermediate risk (S2A2, S1A3, S3A1, or high risk (S3A3, S3A2, S2A3). RESULTS Two hundred forty-six patients had intermediate Supp-SM grade AVMs. Of these patients, 102 had Supp-SM grade 5 (41.5%), 99 had Supp-SM grade 6 (40.2%), and 45 had Supp-SM grade 7 (18.3%). Significant differences in the proportions of patients with worse mRS scores at follow-up were found between the groups, with 24.5% (25/102) of patients in Supp-SM grade 5, 29.3% (29/99) in Supp-SM grade 6, and 57.8% (26/45) in Supp-SM grade 7 (p < 0.001). Patients with Supp-SM grade 7 AVMs had significantly increased odds of worse postoperative mRS scores (p < 0.001; OR 3.7, 95% CI 1.9-7.3). In the expanded cohort of 349 Supp-SM grade 6 AVM patients, a significantly higher proportion of older patients with larger Supp-SM grade 6 AVMs (grade 6+, 38.6%) had neurological deterioration than the others with Supp-SM grade 6 AVMs (22.9%, p = 0.02). Conversely, in an expanded cohort of 197 Supp-SM grade 7 AVM patients, a significantly lower proportion of younger patients with smaller Supp-SM grade 7 AVMs (grade 7-, 19%) had neurological deterioration than the others with Supp-SM grade 7 AVMs (44.9%, p = 0.01). CONCLUSIONS Patients with Supp-SM grade 7 AVMs are at increased risk of worse postoperative neurological outcomes, making Supp-SM grade 6 an appropriate operability cutoff. However, young patients with small niduses in the low-risk Supp-SM grade 7 group (grade 7-) have favorable postoperative outcomes. Outcomes in Supp-SM grade 7 patients did not improve with surgeon experience, indicating that the operability boundary is a hard limit reflecting the complexity of high-grade AVMs.
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Affiliation(s)
- Joshua S Catapano
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Fabio A Frisoli
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Candice L Nguyen
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Mohamed A Labib
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Tyler S Cole
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Jacob F Baranoski
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Helen Kim
- 2Center for Cerebrovascular Research Department of Anesthesia and Perioperative Care, University of California, San Francisco, California
| | - Robert F Spetzler
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
| | - Michael T Lawton
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona and
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Steczek P, Tazarourte K, Benhamed A. Rupture de malformation artérioveineuse cérébelleuse secondaire à un traumatisme crânien léger. ANNALES FRANCAISES DE MEDECINE D URGENCE 2021. [DOI: 10.3166/afmu-2021-0327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Watanabe T, Suematsu Y, Saito K, Takeishi G, Yamashita S, Ohta H, Yokogami K, Takeshima H. Selection of surgical approach for cerebellar hemangioblastomas based on venous drainage patterns. Neurosurg Rev 2021; 44:3567-3579. [PMID: 33877465 DOI: 10.1007/s10143-021-01544-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/09/2021] [Accepted: 04/08/2021] [Indexed: 11/25/2022]
Abstract
Cerebellar hemangioblastomas remain surgically challenging because of the narrow, deep surgical corridors and tumor hypervascularity. Various surgical approaches are used according to the location, but optimal approaches have not been established. We propose a system of surgical approaches based on the venous drainage systems to facilitate surgical planning and achieve acceptable neurological outcomes. Cerebellar hemangioblastomas were divided into five types based on the main drainage systems: suboccipital hemangioblastomas draining to the transverse sinus (TS) or torcula, tentorial hemangioblastomas draining to the tentorial sinus or straight sinus, petrosal hemangioblastomas draining to the superior petrosal sinus (SPS), quadrigeminal hemangioblastomas draining to the galenic system, and tonsillar hemangioblastomas draining to the TS or torcula in conjunction with jugular bulb or SPS. Microsurgical approaches and patient outcome were retrospectively reviewed according to this classification. This study included 17 patients who underwent 21 operations for resection of 19 cerebellar hemangioblastomas, classified into 9 suboccipital, 4 tentorial, 2 petrosal, 2 quadrigeminal, and 2 tonsillar. Standard suboccipital craniotomies were utilized for suboccipital hemangioblastomas, the occipital transtentorial approach (OTA), and supracerebellar infratentorial approach for tentorial hemangioblastomas, the retrosigmoid approach for petrosal hemangioblastomas, OTA for quadrigeminal hemangioblastomas, and midline suboccipital approach for tonsillar hemangioblastomas. Gross total resection was achieved in all patients except one. Two patients with large hemangioblastomas (tonsillar and quadrigeminal) required second-stage operation which finally achieved gross total removal. No single approach had a significantly higher incidence of postoperative neurological deficits. Selection of the optimum surgical approach for cerebellar hemangioblastomas was successful based on the main drainage systems. Understanding of tumor growth and extension with respect to the venous drainage system is critical to select the appropriate surgical approach.
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Affiliation(s)
- Takashi Watanabe
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan.
| | - Yuuki Suematsu
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
| | - Kiyotaka Saito
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
| | - Go Takeishi
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
| | - Shinji Yamashita
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
| | - Hajime Ohta
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
| | - Kiyotaka Yokogami
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
| | - Hideo Takeshima
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake-cho, Miyazaki, 889-1692, Japan
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Grüter BE, Sun W, Fierstra J, Regli L, Germans MR. Systematic review of brain arteriovenous malformation grading systems evaluating microsurgical treatment recommendation. Neurosurg Rev 2021; 44:2571-2582. [PMID: 33501562 PMCID: PMC8490254 DOI: 10.1007/s10143-020-01464-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/30/2020] [Accepted: 12/15/2020] [Indexed: 01/07/2023]
Abstract
When evaluating brain arteriovenous malformations (bAVMs) for microsurgical resection, the natural history of bAVM rupture must be balanced against the perioperative risks. It is therefore adamant to have a reliable surgical grading system, balancing these important factors. This study systematically reviews the literature in order to identify and assess the quality of grading systems with regard to microsurgical bAVM treatment. A systematic literature review was performed to provide an overview of all available bAVM grading systems relevant for microsurgical treatment evaluation and to assess the most comprehensive grading system specifically for each subgroup of bAVM (i.e., unruptured, ruptured, and posterior fossa). Screening of 865 papers revealed thirteen grading systems for bAVM microsurgical risk stratification. Among them, two systems were specifically developed for ruptured bAVM and one specifically for posterior fossa bAVM. With one system being fundamentally different for supratentorial bAVM, the remaining nine systems used the same parameters: “size,” “eloquence,” “venous drainage,” “arterial feeders,” “age,” “nidus compactness,” and “hemorrhagic presentation”. This study provides a comprehensive overview of all available bAVM grading systems relevant for surgical risk stratification. Furthermore, in the absence of a universal system appropriate to score all bAVMs, a workflow for selection of the best applicable scoring system in accordance with bAVM subgroups is presented.
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Affiliation(s)
- Basil E Grüter
- Department of Neurosurgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse, 10, 8091, Zurich, Switzerland.
- Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland.
| | - Wenhua Sun
- Department of Neurosurgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse, 10, 8091, Zurich, Switzerland
- Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland
| | - Jorn Fierstra
- Department of Neurosurgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse, 10, 8091, Zurich, Switzerland
- Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland
| | - Luca Regli
- Department of Neurosurgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse, 10, 8091, Zurich, Switzerland
- Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland
| | - Menno R Germans
- Department of Neurosurgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse, 10, 8091, Zurich, Switzerland
- Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland
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Dellaretti M, da Silveira D, Ferreira Junior TA. Combined strategies on the treatment of cerebellar arteriovenous malformation. NEUROSURGICAL FOCUS: VIDEO 2021; 4:V16. [PMID: 36284613 PMCID: PMC9542499 DOI: 10.3171/2020.10.focvid2058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 10/16/2020] [Indexed: 11/30/2022]
Abstract
Cerebellar arteriovenous malformations (AVMs) comprise 10%–15% of all intracranial AVMs and have a higher risk for morbidity and mortality than supratentorial AVMs. Patients with cerebellar AVMs present with hemorrhage more often than patients with cerebral AVMs, justifying an interventional treatment. Patient outcome can be predicted with specific grade systems, guiding vascular neurosurgeons in decision-making. The authors present the case of a 42-year-old man incidentally diagnosed with an unruptured cerebellar inferior vermian AVM, which was managed through a combined strategy of preoperative endovascular embolization of the main arterial feeders followed by microsurgical resection via midline suboccipital craniotomy, with a favorable outcome. The video can be found here: https://youtu.be/3WESejZbk90
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Affiliation(s)
- Marcos Dellaretti
- Neurosurgery and Neurology Department, Santa Casa de Belo Horizonte, and
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Diego da Silveira
- Neurosurgery and Neurology Department, Santa Casa de Belo Horizonte, and
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