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Joshi SB, Sharma R, Manjunath N, Dhanakshirur RR, Ganesh VL, Jain S, Raheja A, Devrajan LJ, Nehra A, Suri A. Functional and Neuropsychological Outcome After Surgical Treatment of Moyamoya Disease. World Neurosurg 2024; 185:e397-e406. [PMID: 38364899 DOI: 10.1016/j.wneu.2024.02.038] [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: 12/29/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND Moyamoya disease (MMD) is a rare cerebrovascular disease characterized by progressive stenosis of the supraclinoid internal carotid artery. As a result of chronically decreased brain perfusion, eloquent areas of the brain become hypoperfused, leading to cognitive changes in patients. Repeated infarcts and bleeds produce clinically apparent neurologic deficits. OBJECTIVES 1) To study the functional and neuropsychological outcome in MMD after revascularization surgery. 2) To find postrevascularization correlation between functional and neuropsychological improvement and radiologic improvement. METHODS A single-center prospective and analytic study was carried out including 21 patients with MMD during the study period from March 2021 to December 2022. Patients were evaluated and compared before and after revascularization for functional, neuropsychological, and radiologic status. RESULTS Postoperative functional outcome in terms of modified Rankin Scale score showed improvement in 33.33% of cases (P = 0.0769). An overall improving trend was observed in different neuropsychological domains in both adult and pediatric age groups. However, the trend of neuropsychological improvement was better in adults compared with pediatric patients. Radiologic outcome in the form of the Angiographic Outcome Score (AOS) significantly improved after revascularization (P = 0.0001). There was a trend toward improvement in magnetic resonance imaging (MRI) perfusion in the middle cerebral artery and anterior cerebral artery territories, 4.7% (P = 0.075) and 9.33% (P = 0.058) respectively, compared with preoperative MRI perfusion. CONCLUSIONS After revascularization, significant improvement occurred in functional and neuropsychological status. This result was also shown radiologically as evidenced by improvement in MRI perfusion and cerebral angiography.
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Affiliation(s)
- Siddharth B Joshi
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Rajeev Sharma
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Niveditha Manjunath
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Rohan Raju Dhanakshirur
- Amarnath and Shashi Khosla School of Information Technology, Indian Institute of Technology, New Delhi, India
| | - V L Ganesh
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Savyasachi Jain
- Department of Neuroimaging and Interventional Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | - Amol Raheja
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Leve Joseph Devrajan
- Department of Neuroimaging and Interventional Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | - Ashima Nehra
- Department of Neuropsychology, All India Institute of Medical Sciences, New Delhi, India
| | - Ashish Suri
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
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Seo YS, Lee S, Choi YH, Cho YJ, Lee SB, Cheon JE. Monitoring Posterior Cerebral Perfusion Changes With Dynamic Susceptibility Contrast-Enhanced Perfusion MRI After Anterior Revascularization Surgery in Pediatric Moyamoya Disease. Korean J Radiol 2023; 24:784-794. [PMID: 37500579 PMCID: PMC10400367 DOI: 10.3348/kjr.2023.0035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 05/31/2023] [Accepted: 06/12/2023] [Indexed: 07/29/2023] Open
Abstract
OBJECTIVE To determine whether dynamic susceptibility contrast-enhanced (DSC) perfusion magnetic resonance imaging (MRI) can be used to evaluate posterior cerebral circulation in pediatric patients with moyamoya disease (MMD) who underwent anterior revascularization. MATERIALS AND METHODS This study retrospectively included 73 patients with MMD who underwent DSC perfusion MRI (age, 12.2 ± 6.1 years) between January 2016 and December 2020, owing to recent-onset clinical symptoms during the follow-up period after completion of anterior revascularization. DSC perfusion images were analyzed using a dedicated software package (NordicICE; Nordic NeuroLab) for the middle cerebral artery (MCA), posterior cerebral artery (PCA), and posterior border zone between the two regions (PCA-MCA). Patients were divided into two groups; the PCA stenosis group included 30 patients with newly confirmed PCA involvement, while the no PCA stenosis group included 43 patients without PCA involvement. The relationship between DSC perfusion parameters and PCA stenosis, as well as the performance of the parameters in discriminating between groups, were analyzed. RESULTS In the PCA stenosis group, the mean follow-up duration was 5.3 years after anterior revascularization, and visual disturbances were a common symptom. Normalized cerebral blood volume was increased, and both the normalized time-to-peak (nTTP) and mean transit time values were significantly delayed in the PCA stenosis group compared with those in the no PCA stenosis group in the PCA and PCA-MCA border zones. TTPPCA (odds ratio [OR] = 6.745; 95% confidence interval [CI] = 2.665-17.074; P < 0.001) and CBVPCA-MCA (OR = 1.567; 95% CI = 1.021-2.406; P = 0.040) were independently associated with PCA stenosis. TTPPCA showed the highest receiver operating characteristic curve area in discriminating for PCA stenosis (0.895; 95% CI = 0.803-0.986). CONCLUSION nTTP can be used to effectively diagnose PCA stenosis. Therefore, DSC perfusion MRI may be a valuable tool for monitoring PCA stenosis in patients with MMD.
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Affiliation(s)
- Yun Seok Seo
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Seunghyun Lee
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Innovative Medical Technology Research Institute, Seoul National University Hospital, Seoul, Republic of Korea.
| | - Young Hun Choi
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yeon Jin Cho
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seul Bi Lee
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jung-Eun Cheon
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea
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Sun H, Li Y, Xiao A, Li W, Xia C, You C, Ma L, Liu Y, Xia C. Nomogram to Predict Good Collateral Formation After the STA-MCA Bypass Surgery in Adult Patients With Moyamoya Disease. Stroke 2023; 54:751-758. [PMID: 36748463 DOI: 10.1161/strokeaha.122.039975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Collateral formation from the extracranial carotid artery to ischemic brain tissue determines the clinical success of superficial temporal artery (STA) to middle cerebral artery (MCA) bypass surgery in adult patients with moyamoya disease, but postoperative collateral formation (PCF) after STA-MCA bypass surgery is unpredictable. Accurate preoperative prediction of acceptable PCF could improve patient selection. This study aims to develop a prediction nomogram model for PCF in this patient population. METHODS Adult patients with moyamoya disease undergoing the STA-MCA bypass surgery between January 2013 and December 2020 at a single institution were retrospectively or prospectively enrolled in this observational study. Data including potential clinical and radiological predictors were obtained from hospital records. A nomogram was generated based on a multivariate logistic regression analysis, to identify potential predictors associated with good PCF. The performance of the nomogram was evaluated for discrimination, calibration, and clinical utility. RESULTS Data from 243 patients with moyamoya disease who underwent the STA-MCA bypass surgery were analyzed to build the nomogram. After 1-year follow-up, 162 (66.7%) hemispheres had good PCF and 81 (33.3%) had poor PCF. Good PCF is associated with 3 preoperative factors: age at operation, a diameter of donor branch of STA, and the preinfarction period stage. Incorporating these 3 factors, the model achieved a concordance index of 0.88 (95% CI, 0.84-0.92) and had a well-fitted calibration curve and good clinical application value. A cutoff value of 100 was determined to predict good PCF via this nomogram. CONCLUSIONS The nomogram exhibits high accuracy in predicting good PCF after the STA-MCA bypass surgery in adult patients with moyamoya disease and may allow surgeons to better evaluate preoperatively candidacy for successful bypass surgery.
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Affiliation(s)
- Haogeng Sun
- Department of Neurosurgery (H.S., Y. Li, A.X., C.Y., L.M., Y. Liu.), West China Hospital, Sichuan University, Chengdu, China
| | - Yue Li
- Department of Neurosurgery (H.S., Y. Li, A.X., C.Y., L.M., Y. Liu.), West China Hospital, Sichuan University, Chengdu, China
| | - Anqi Xiao
- Department of Neurosurgery (H.S., Y. Li, A.X., C.Y., L.M., Y. Liu.), West China Hospital, Sichuan University, Chengdu, China
| | - Wanjiang Li
- Department of Radiology (W.L., Chao Xia, Chunchao Xia), West China Hospital, Sichuan University, Chengdu, China
| | - Chao Xia
- Department of Radiology (W.L., Chao Xia, Chunchao Xia), West China Hospital, Sichuan University, Chengdu, China
| | - Chao You
- Department of Neurosurgery (H.S., Y. Li, A.X., C.Y., L.M., Y. Liu.), West China Hospital, Sichuan University, Chengdu, China
| | - Lu Ma
- Department of Neurosurgery (H.S., Y. Li, A.X., C.Y., L.M., Y. Liu.), West China Hospital, Sichuan University, Chengdu, China
| | - Yi Liu
- Department of Neurosurgery (H.S., Y. Li, A.X., C.Y., L.M., Y. Liu.), West China Hospital, Sichuan University, Chengdu, China
| | - Chunchao Xia
- Department of Radiology (W.L., Chao Xia, Chunchao Xia), West China Hospital, Sichuan University, Chengdu, China
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Bersano A, Khan N, Fuentes B, Acerbi F, Canavero I, Tournier-Lasserve E, Vajcoczy P, Zedde ML, Hussain S, Lémeret S, Kraemer M, Herve D. European Stroke Organisation (ESO) Guidelines on Moyamoya angiopathy: Endorsed by Vascular European Reference Network (VASCERN). Eur Stroke J 2023; 8:55-84. [PMID: 37021176 PMCID: PMC10069176 DOI: 10.1177/23969873221144089] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 11/16/2022] [Indexed: 02/05/2023] Open
Abstract
The European Stroke Organisation (ESO) guidelines on Moyamoya Angiopathy (MMA), developed according to ESO standard operating procedure and Grading of Recommendations, Assessment, Development and Evaluation (GRADE) methodology, were compiled to assist clinicians in managing patients with MMA in their decision making. A working group involving neurologists, neurosurgeons, a geneticist and methodologists identified nine relevant clinical questions, performed systematic literature reviews and, whenever possible, meta-analyses. Quality assessment of the available evidence was made with specific recommendations. In the absence of sufficient evidence to provide recommendations, Expert Consensus Statements were formulated. Based on low quality evidence from one RCT, we recommend direct bypass surgery in adult patients with haemorrhagic presentation. For ischaemic adult patients and children, we suggest revascularization surgery using direct or combined technique rather than indirect, in the presence of haemodynamic impairment and with an interval of 6–12 weeks between the last cerebrovascular event and surgery. In the absence of robust trial, an Expert Consensus was reached recommending long-term antiplatelet therapy in non-haemorrhagic MMA, as it may reduce risk of embolic stroke. We also agreed on the utility of performing pre- and post- operative haemodynamic and posterior cerebral artery assessment. There were insufficient data to recommend systematic variant screening of RNF213 p.R4810K. Additionally, we suggest that long-term MMA neuroimaging follow up may guide therapeutic decision making by assessing the disease progression. We believe that this guideline, which is the first comprehensive European guideline on MMA management using GRADE methods will assist clinicians to choose the most effective management strategy for MMA.
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Affiliation(s)
- Anna Bersano
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Nadia Khan
- Moyamoya Center, University Children’s Hospital Zurich, Switzerland
- Moyamoya Center for adults, Department of Neurosurgery, University Tubingen, Germany
| | - Blanca Fuentes
- Department of Neurology and Stroke Center, Hospital La Paz Institute for Health Research-IdiPAZ (La Paz University Hospital-Universidad Autónoma de Madrid), Madrid, Spain
| | - Francesco Acerbi
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Isabella Canavero
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | | | - Peter Vajcoczy
- Department of Neurosurgery, Charité Universitätsmedizin Berlin, Germany
| | - Maria Luisa Zedde
- Neurology Unit, Stroke Unit, Azienda Unità Sanitaria Locale – IRCCS di Reggio Emilia, Italy
| | | | | | - Markus Kraemer
- Department of Neurology, Alfried Krupp Hospital, Essen, Germany
- Department of Neurology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - Dominique Herve
- CNVT-CERVCO et département de Neurologie, Hôpital Lariboisière, APHP Nord, Paris, France
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Yeh SJ, Tang SC, Tsai LK, Chen TC, Li PL, Chen YF, Kuo MF, Jeng JS. Postoperative vascular event prediction using angiography and ultrasonography in patients with Moyamoya disease. J Neurol Sci 2022; 442:120408. [PMID: 36108529 DOI: 10.1016/j.jns.2022.120408] [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: 05/19/2022] [Revised: 08/15/2022] [Accepted: 08/29/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVE Indirect revascularization surgery reduce the risk of recurrent vascular events in patients with moyamoya disease (MMD), but the roles of postoperative angiography and ultrasonography in predicting these events remain unclear. METHODS This prospective study enrolled patients with MMD who would undergo their first unilateral indirect revascularization surgery. They received preoperative and postoperative ultrasound examination at 1, 3, and 6 months and conventional cerebral angiography. On ultrasonography, postoperative emerging flow (PEF) in an intracranial artery was defined as emerging flow postoperatively with absence of flow preoperatively. Predictors of vascular event frequency reduction were identified from angiographic and ultrasonographic parameters. RESULTS In total, 52 patients (including 24 pediatric and 24 male patients), who underwent 52 preoperative and 82 postoperative ultrasound examinations, were enrolled. Significant postoperative changes were noted in all the ultrasonographic parameters of ipsilateral superficial temporal artery (STA) and the end-diastolic velocity and flow volume in contralateral STA. During a median follow-up of 5.3 years, indirect revascularization surgery significantly reduced the occurrence of ipsilateral vascular events. Predictors of vascular event frequency reduction included Matsushima grade A or B on the ipsilateral side on angiography (odds ratio [OR] = 22.00, P = 0.002) and lower resistance index (RI) in ipsilateral STA (OR = 0.0001, P = 0.012) but no PEF pattern in ipsilateral middle cerebral artery (OR = 0.14, P = 0.029) on ultrasonography performed within 6 months. CONCLUSIONS Reduction of long-term vascular event frequency probably can be predicted through postoperative angiography and ultrasonography within 6 months after indirect revascularization surgery.
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Affiliation(s)
- Shin-Joe Yeh
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Sung-Chun Tang
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Li-Kai Tsai
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan; Department of Neurology, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan
| | - Tzu-Ching Chen
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Pei-Lin Li
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Ya-Fang Chen
- Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan
| | - Meng-Fai Kuo
- Department of Neurosurgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Jiann-Shing Jeng
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan.
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Chen YN, Lee CW, Xiao F, Chen YF, Hu TY, Kuo MF. A Proposed Algorithm for Managing Cerebral Proliferative Angiopathy. World Neurosurg 2022; 167:e360-e369. [PMID: 35961587 DOI: 10.1016/j.wneu.2022.08.009] [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: 04/19/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 10/31/2022]
Abstract
OBJECTIVE Cerebral proliferative angiopathy (CPA) is a rare disease, characterized by a large vascular nidus, diffuse angiogenesis, and intermingled normal brain tissue. Conservative treatment, endovascular intervention, indirect revascularization, and radiotherapy have been applied to treat this disease. However, some cases deteriorate even after non-conservative treatment, and there has been no standard of treatment for this disease so far. In order to build a better treatment strategy, we review literature, present our case and propose an algorithm for managing CPA. METHODS Following the PRISMA principle, we systemically reviewed literature discussing CPA. A case successfully managed with multi-modal treatment is also illustrated. RESULTS A total of 23 articles with 74 cases of CPA were found. Thirty-three patients received single-modal management. These 33 cases include 24 receiving endovascular intervention, 7 receiving indirect revascularization, and 2 receiving radiotherapy. Three of the 33 patients deteriorated clinically, and 1 expired. We present a 6-year-old boy with left hemispheric CPA receiving indirect revascularization, followed by 2 consecutive courses of stereotactic radiosurgery targeting arteriovenous shunts in the left basal ganglia and arteriovenous shunts around the olfactory groove. In the follow-up period of more than 4 years, good collateral formation, improved perilesional perfusion, CPA shrinkage, and symptom relief were all achieved. CONCLUSIONS Based on our literature review and case, we propose an algorithm for the management of CPA and emphasize that multi-modal treatment is necessary for most CPA cases.
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Affiliation(s)
- Yu-Ning Chen
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, Hsin-Chu Branch, Hsinchu City, Taiwan
| | - Chung-Wei Lee
- Department of Medical Imaging, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei City, Taiwan
| | - Furen Xiao
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei City, Taiwan
| | - Ya-Fang Chen
- Department of Medical Imaging, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei City, Taiwan
| | - Tiffany Y Hu
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, Hsin-Chu Branch, Hsinchu City, Taiwan
| | - Meng-Fai Kuo
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei City, Taiwan.
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Yu Z, Bai X, Zhang Y, Zhang G, Qiu C, Chen L, Li S, He S, Ma J, Zhao J. Baseline Hemodynamic Impairment and Revascularization Outcome in Newly Diagnosed Adult Moyamoya Disease Determined by Pseudocontinuous Arterial Spin Labeling. World Neurosurg 2022; 165:e494-e504. [PMID: 35750142 DOI: 10.1016/j.wneu.2022.06.084] [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: 03/24/2022] [Revised: 06/15/2022] [Accepted: 06/16/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The study aimed to investigate the hemodynamic features and independent predictors of neoangiogenesis after revascularization in moyamoya disease (MMD) by pseudocontinuous arterial spin labeling magnetic resonance imaging (pCASL MRI). METHODS Thirty-nine MMD patients were categorized into infarction group, hemorrhagic group, and atypical group. All patients underwent combined bypass surgery and pCASL MRI with postlabeling delays (PLD) of 1525 ms and 2525 ms. Absolute CBFMCA (cerebral blood flow in middle cerebral artery territory), relative CBFMCA (CBFMCA 2525 ms/CBFMCA 1525 ms), and spatial coefficient of variation of MCA (CoVMCA) were analyzed. Relationships between CBFMCA and the following clinical parameters were assessed: Suzuki stage, modified Rankin scale (mRS), cerebrovascular accident lesion score, and deep medullary veins score. Potential predictors for favorable neoangiogenesis and hemodynamic changes were explored as well. RESULTS Preoperative CBFMCA differed among MMD patients with variable clinical presentations, Matsushima stages, modified Rankin Scale scores, CVA scores, and deep medullary vein scores. After bypass surgery, mean CBFMCA increased significantly in the infarction group (P = 0.027) and decreased in the hemorrhagic group (P = 0.043), while spatial CoVMCA was observed to decline in all groups. Higher preoperative relative CBFMCA and spatial CoVMCA were independent predictors for robust neoangiogenesis after bypass. The cutoff value of 0.330 of spatial CoVMCA at long PLD yielded the best sensitivity at 82.1% and specificity at 81.8%. Furthermore, both preoperative relative CBFMCA and spatial CoVMCA showed mild positive correlations with ΔmRS in MMD patients. CONCLUSIONS pCASL-MRI with multiple PLDs could reflect preoperative hemodynamic impairment and predict the neoangiogenesis after combined bypass surgery in moyamoya patients.
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Affiliation(s)
- Zhiqiang Yu
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Xingcheng Bai
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Yanping Zhang
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Guangxu Zhang
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Chen Qiu
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Lijiu Chen
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Shun Li
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Shengxue He
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Jun Ma
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Jinbing Zhao
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China.
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Zhao J, Yu Z, Zhang Y, Qiu C, Zhang G, Chen L, He S, Ma J. Caveolin-1 Promoted Collateral Vessel Formation in Patients With Moyamoya Disease. Front Neurol 2022; 13:796339. [PMID: 35557625 PMCID: PMC9086974 DOI: 10.3389/fneur.2022.796339] [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: 10/16/2021] [Accepted: 03/24/2022] [Indexed: 11/18/2022] Open
Abstract
Background Caveolin-1 (Cav-1) plays pivotal roles in the endothelial function and angiogenesis postischemia. Moyamoya disease (MMD) is characterized by progressive artery stenosis with unknown etiology. We aim to determine whether serum Cav-1 levels of patients with MMD were associated with collateral vessel formation after bypass surgery. Methods We studied serum Cav-1 levels of 130 patients with MMD (16 with RNF213 p.R4810K mutation and 114 without RNF213 p.R4810K mutation), 15 patients with acute stroke, and 33 healthy controls. Cerebral perfusion and collateral circulation were evaluated preoperation and at 6 months after operation using pseudocontinuous arterial spin labeling MRI (pCASL-MRI) and digital subtraction angiography (DSA), respectively. Endothelial expression of Cav-1 was verified in the superficial temporal artery (STA) wall of patients with MMD by immunofluorescence double staining. We also investigated whether overexpression of Cav-1 affects cell migration and tube formation using human microvascular endothelial cells (HMECs). Results The serum Cav-1 level of patients with MMD intermediated between the stroke group and healthy controls and it was enhanced after the bypass surgery (681.87 ± 311.63 vs. 832.91 ± 464.41 pg/ml, p = 0.049). By 6 months after bypass surgery, patients with MMD with better collateral compensation manifested higher postoperative/preoperative Cav-1 ratio (rCav-1) than bad compensation patients. Consistently, cerebral blood flow (CBF) determined by pCASL-MRI (nCBFMCA ratio) was positively in line with rCav-1 ratio (r = 0.8615, p < 0.0001). Cav-1 was expressed in the endothelial cells of the STA vessels of patients with MMD. Overexpression of Cav-1 by plasmid transfection in HMECs promoted tube formation and cell migration. Conclusion This study indicated that Cav-1 may be a potential driver to promote angiogenesis and collateral formation after bypass surgery in patients with MMD, providing a better understanding of MMD pathophysiology and potential non-surgical targets of MMD.
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Affiliation(s)
- Jinbing Zhao
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Zhiqiang Yu
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Yanping Zhang
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Cheng Qiu
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Guangxu Zhang
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Lijiu Chen
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Shengxue He
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Jun Ma
- Nanjing Comprehensive Stroke Center, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
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Montaser AS, Lalgudi Srinivasan H, Staffa SJ, Zurakowski D, Slingerland AL, Orbach DB, Hausman-Kedem M, Roth J, Smith ER. Ivy sign: a diagnostic and prognostic biomarker for pediatric moyamoya. J Neurosurg Pediatr 2022; 29:458-466. [PMID: 34972077 DOI: 10.3171/2021.11.peds21384] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 11/04/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Ivy sign is a radiographic finding on FLAIR MRI sequences and is associated with slow cortical blood flow in moyamoya. Limited data exist on the utility of the ivy sign as a diagnostic and prognostic tool in pediatric patients, particularly outside of Asian populations. The authors aimed to investigate a modified grading scale with which to characterize the prevalence and extent of the ivy sign in children with moyamoya and evaluate its efficacy as a biomarker in predicting postoperative outcomes, including stroke risk. METHODS Pre- and postoperative clinical and radiographic data of all pediatric patients (21 years of age or younger) who underwent surgery for moyamoya disease or moyamoya syndrome at two major tertiary referral centers in the US and Israel, between July 2009 and August 2019, were retrospectively reviewed. Ivy sign scores were correlated to Suzuki stage, Matsushima grade, and postoperative stroke rate to quantify the diagnostic and prognostic utility of ivy sign. RESULTS A total of 171 hemispheres in 107 patients were included. The median age at the time of surgery was 9 years (range 3 months-21 years). The ivy sign was most frequently encountered in association with Suzuki stage III or IV disease in all vascular territories, including the anterior cerebral artery (53.7%), middle cerebral artery (56.3%), and posterior cerebral artery (47.5%) territories. Following surgical revascularization, 85% of hemispheres with Matsushima grade A demonstrated a concomitant, statistically significant reduction in ivy sign scores (OR 5.3, 95% CI 1.4-20.0; p = 0.013). Postoperatively, revascularized hemispheres that exhibited ivy sign score decreases had significantly lower rates of postoperative stroke (3.4%) compared with hemispheres that demonstrated no reversal of the ivy sign (16.1%) (OR 5.5, 95% CI 1.5-21.0; p = 0.008). CONCLUSIONS This is the largest study to date that focuses on the role of the ivy sign in pediatric moyamoya. These data demonstrate that the ivy sign was present in approximately half the pediatric patients with moyamoya with Suzuki stage III or IV disease, when blood flow was most unstable. The authors found that reversal of the ivy sign provided both radiographic and clinical utility as a prognostic biomarker postoperatively, given the statistically significant association with both better Matsushima grades and a fivefold reduction in postoperative stroke rates. These findings can help inform clinical decision-making, and they have particular value in the pediatric population, as the ability to minimize additional radiographic evaluations and tailor radiographic surveillance is requisite.
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Affiliation(s)
- Alaa S Montaser
- 1Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.,2Department of Neurosurgery, Mayo Clinic, Jacksonville, Florida
| | | | - Steven J Staffa
- 4Departments of Anesthesiology and Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - David Zurakowski
- 4Departments of Anesthesiology and Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Anna L Slingerland
- 1Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Darren B Orbach
- 1Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.,5Department of Radiology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Moran Hausman-Kedem
- 6Pediatric Neurology Institute, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; and.,7Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Jonathan Roth
- 3Department of Neurosurgery, Dana Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,7Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Edward R Smith
- 1Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
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10
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Joo B, Kim J, Hwang JK, Shim KW, Lee SK. Salvage multiple burr hole surgery in patients with Moyamoya disease: efficacy evaluation using probabilistic independent component analysis of dynamic susceptibility contrast perfusion MRI. Neuroradiology 2022; 64:1737-1745. [PMID: 35237848 DOI: 10.1007/s00234-022-02909-w] [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: 10/04/2021] [Accepted: 01/25/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE Multiple burr hole surgery is considered to be an option for achieving indirect revascularization in patients with ischemic Moyamoya disease (MMD). We aimed to investigate the efficacy of stand-alone multiple burr hole surgery for salvage revascularization in patients with MMD by assessing the hemodynamic changes via normalized time-to-peak (nTTP) analysis and independent component analysis (ICA) of preoperative and postoperative dynamic susceptibility contrast (DSC) perfusion MRI data. METHODS The DSC perfusion MRI data of 25 hemispheres from 21 patients with MMD, who underwent multiple burr hole surgery for salvage revascularization due to persistent or recurrent symptoms after primary revascularization with modified encephaloduroarteriosynangiosis (mEDAS), were analyzed. The nTTP, which was measured using the region of interests covering the entire surgical hemisphere, was compared between the preoperative and postoperative images. ICA was used to compare the relative arterial and venous components of the surgical hemispheres between the respective preoperative and postoperative images. RESULTS The median postoperative nTTP (1.80 s) was significantly shorter than the median preoperative nTTP (4.10 s) (P < 0.001). The postoperative relative arterial component of the surgical hemisphere (median: 0.04) was significantly higher than the preoperative relative arterial component (median: - 0.02, P < 0.001). In contrast, the postoperative relative venous component of the surgical hemisphere (median: - 0.05) was significantly lower than the preoperative value (median: 0.05, P < 0.001). CONCLUSION The improvement in cerebral perfusion parameters observed on postoperative DSC perfusion MRI demonstrated that stand-alone multiple burr hole surgery could be a favorable salvage revascularization technique after mEDAS failure in patients with ischemic MMD.
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Affiliation(s)
- Bio Joo
- Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jinna Kim
- Department of Radiology, Research Institute of Radiological Science and Center for Clinical Image Data Science, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, Korea.
| | - Jun Kyu Hwang
- Department of Neurosurgery, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Gyeonggi-do, Korea
| | - Kyu-Won Shim
- Department of Pediatric Neurosurgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Seung-Koo Lee
- Department of Radiology, Research Institute of Radiological Science and Center for Clinical Image Data Science, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, Korea
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11
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Long-term outcomes of moyamoya disease following indirect revascularization in middle adulthood: A prospective, quantitative study. J Formos Med Assoc 2022; 121:1758-1766. [DOI: 10.1016/j.jfma.2022.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 12/27/2021] [Accepted: 01/06/2022] [Indexed: 11/19/2022] Open
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12
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Ibrahim M, Ghazi TU, Bapuraj JR, Srinivasan A. Contrast Pediatric Brain Perfusion: Dynamic Susceptibility Contrast and Dynamic Contrast-Enhanced MR Imaging. Magn Reson Imaging Clin N Am 2021; 29:515-526. [PMID: 34717842 DOI: 10.1016/j.mric.2021.06.004] [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] [Indexed: 01/11/2023]
Abstract
Magnetic resonance (MR) perfusion is a robust imaging technique that assesses the passage of blood through the cerebral vascular network using a variety of techniques. The applications of MR perfusion have been expanded and is well suited to investigate cerebrovascular diseases and cerebral neoplastic processes in pediatric patients. Assessment of brain perfusion can augment the information obtained on conventional MR imaging and provides additional information on the biological and physiologic features of pediatric brain tumors. Similarly, MR perfusion can help guide the management of a variety of pediatric cerebrovascular diseases, including acute ischemic stroke and Moyamoya syndrome.
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Affiliation(s)
- Mohannad Ibrahim
- Radiology Department, Neuroradiology Division, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Talha Ul Ghazi
- Michigan State University, College of Human Medicine, 965 Fee Road A110, East Lansing, MI 48824, USA
| | - Jayapalli Rajiv Bapuraj
- Radiology Department, Neuroradiology Division, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Ashok Srinivasan
- Radiology Department, Neuroradiology Division, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA.
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13
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Zhang X, Xiao W, Zhang Q, Xia D, Gao P, Su J, Yang H, Gao X, Ni W, Lei Y, Gu Y. Progression in Moyamoya Disease: Clinical Feature, Neuroimaging Evaluation and Treatment. Curr Neuropharmacol 2021; 20:292-308. [PMID: 34279201 PMCID: PMC9413783 DOI: 10.2174/1570159x19666210716114016] [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: 01/28/2021] [Revised: 05/08/2021] [Accepted: 07/09/2021] [Indexed: 11/22/2022] Open
Abstract
Moyamoya disease (MMD) is a chronic cerebrovascular disease characterized by progressive stenosis of the arteries of the circle of Willis, with the formation of collateral vascular network at the base of the brain. Its clinical manifestations are complicated. Numerous studies have attempted to clarify the clinical features of MMD, including its epidemiology, genetic characteristics, and pathophysiology. With the development of neuroimaging techniques, various neuroimaging modalities with different advantages have deepened the understanding of MMD in terms of structural, functional, spatial, and temporal dimensions. At present, the main treatment for MMD focuses on neurological protection, cerebral blood flow reconstruction, and neurological rehabilitation, such as pharmacological treatment, surgical revascularization, and cognitive rehabilitation. In this review, we discuss recent progress in understanding the clinical features, in the neuroimaging evaluation and treatment of MMD.
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Affiliation(s)
- Xin Zhang
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Weiping Xiao
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Qing Zhang
- Department of Nursing, Huashan Hospital North, Fudan University, China
| | - Ding Xia
- Department of Radiology, Huashan Hospital North, Fudan University, China
| | - Peng Gao
- Department of Radiology, Huashan Hospital North, Fudan University, China
| | - Jiabin Su
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Heng Yang
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Xinjie Gao
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Wei Ni
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Yu Lei
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
| | - Yuxiang Gu
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, China
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14
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Hwang JK, Park EK, Kim J, Kang HC, Kim DS, Shim KW. The feasibility of performing multiple burr hole surgery in pediatric moyamoya patients as a response to failed mEDAS. Childs Nerv Syst 2021; 37:2233-2238. [PMID: 33755793 DOI: 10.1007/s00381-021-05093-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 02/14/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To investigate the feasibility and clinical effectiveness of performing multiple burr hole surgery in pediatric moyamoya patients as a response to failed modified encephaloduroarteriosynangiosis (mEDAS). METHODS From January 2014 to May 2018, multiple burr hole surgery (MBS) was conducted on 16 hemispheres in 12 patients as a secondary treatment following mEDAS. The male-to-female ratio was 1:2 and the average age at the time of mEDAS was 6 years old. The average patient age was 9 ± 3 years olds (range 7-17) at the time of MBS which occurred an average of 46 months after mEDAS. An average of 10 ± 1 holes (range 8-13) were made. Time-to-peak (TTP) magnetic resonance images (MRI) were taken along 20 axial cuts. Of these cuts, two consecutive cuts on the lateral ventricle were selected to calculate the average value of the region of interest (ROI). The value of the cerebellum was subtracted from the average value of two consecutive cuts. The ROI value was analyzed using a paired t test by SPSS 20 (SPSS Inc., Chicago, IL, USA). RESULTS All 16 cases presented improvement of clinical symptoms as determined by ROI analysis of the TTP MRI images. The average ROI value was 5.03 ± 6.36 before MBS and - 15.54 ± 9.42 after MBS. The average change in the ROI value was - 20.58 ± 12.59. The ROI value decreased in all cases after MBS. Magnetic resonance angiography (MRA) also showed a positive effect on vascularization. CONCLUSION In pediatric moyamoya patients, MBS is recommended as secondary option as a response to failed mEDAS. Its clinical effectiveness was shown by analyzing TTP images and assisted by MRA and digital subtraction angiography.
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Affiliation(s)
- Jun Kyu Hwang
- Department of Neurosurgery, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
| | - Eun Kyung Park
- Department of Pediatric Neurosurgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jinna Kim
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Hoon-Chul Kang
- Department of Pediatric Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Dong-Seok Kim
- Department of Pediatric Neurosurgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Kyu-Won Shim
- Department of Pediatric Neurosurgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
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15
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Araki Y, Yokoyama K, Uda K, Kanamori F, Mamiya T, Nishihori M, Sumitomo M, Okamoto S, Izumi T. Ipsilateral late stroke after revascularization surgery for patients with Moyamoya disease. Acta Neurochir (Wien) 2021; 163:1493-1502. [PMID: 33624115 DOI: 10.1007/s00701-021-04773-8] [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: 11/11/2020] [Accepted: 02/16/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Ipsilateral late stroke events occurring after cerebral revascularization for Moyamoya disease (MMD) and their risk factors have not been fully investigated. METHODS We retrospectively analyzed 123 patients with MMD who underwent 212 revascularizations. We investigated preoperative demographic data, surgical procedures, and ipsilateral stroke events occurring more than 1 month after surgery. The effect of revascularization and the residual Moyamoya vessel (MMV) score were examined using magnetic resonance angiography (MRA). Then, predictive factors for postoperative late stroke occurrence were evaluated by logistic regression. RESULTS The mean age was 26 ± 18.4 years (range 1 to 66 years). Ipsilateral late stroke events were present in 11 of 123 (9%) patients. Stroke occurred in 11 out of 212 surgeries (5.2%) on a hemispheric basis. During the 1300.1 hemisphere-years of follow-up more than 1 month after surgery, the annual stroke rate was 0.84%. The postoperative MRA time-of-flight image showed a mean revascularization score of 1.82 ± 0.6 and a mean residual MMV score of 1.91 ± 0.83. Postoperative strokes occurring within 1 month after cerebral revascularization (36.4%, p = 0.0026) and lower revascularization scores (1.82 ± 0.6 vs 2.51 ± 0.59, p = 0.0006) were significant factors related to the presence of ipsilateral late stroke. Logistic regression showed that stroke events within 1 month after revascularization (odds ratio [OR], 9.79; 95% confidence interval [CI], 0.02-0.57; p = 0.0103), low revascularization score (OR, 0.15; 95% CI, 0.001-0.37; p = 0.0069), and high residual MMV score (OR, 16.2; 95% CI, 1.88-187.4; p = 0.0107) were risk factors for ipsilateral stroke more than 1 month after revascularization. CONCLUSIONS MMD patients who have a stroke within 1 month after cerebral revascularization are at high risk for late strokes. Less effective revascularization or remarkable residual MMV are risk factors for late stroke events. Additional revascularization may be considered for patients in such situations. CLINICAL TRIAL REGISTRATION This study was approved by the Bioethics Review Committee of Nagoya University Hospital for the treatment and prognosis of Moyamoya disease (2016-0327).
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16
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Time to peak and full width at half maximum in MR perfusion: valuable indicators for monitoring moyamoya patients after revascularization. Sci Rep 2021; 11:479. [PMID: 33436788 PMCID: PMC7804964 DOI: 10.1038/s41598-020-80036-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 12/15/2020] [Indexed: 12/18/2022] Open
Abstract
Moyamoya disease (MMD) is a chronic, steno-occlusive cerebrovascular disorder of unknown etiology. Surgical treatment is the only known effective method to restore blood flow to affected areas of the brain. However, there are lack of generally accepted noninvasive tools for therapeutic outcome monitoring. As dynamic susceptibility contrast (DSC) magnetic resonance imaging (MRI) is the standard MR perfusion imaging technique in the clinical setting, we investigated a dataset of nineteen pediatric MMD patients with one preoperational and multiple periodic DSC MRI examinations for four to thirty-eight months after indirect revascularization. A rigid gamma variate model was used to derive two nondeconvolution-based perfusion parameters: time to peak (TTP) and full width at half maximum (FWHM) for monitoring transitional bolus delay and dispersion changes respectively. TTP and FWHM values were normalized to the cerebellum. Here, we report that 74% (14/19) of patients improve in both TTP and FWHM measurements, and whereof 57% (8/14) improve more noticeably on FWHM. TTP is in good agreement with Tmax in estimating bolus delay. Our study data also suggest bolus dispersion estimated by FWHM is an additional, informative indicator in pediatric MMD monitoring.
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17
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Lehman VT, Cogswell PM, Rinaldo L, Brinjikji W, Huston J, Klaas JP, Lanzino G. Contemporary and emerging magnetic resonance imaging methods for evaluation of moyamoya disease. Neurosurg Focus 2020; 47:E6. [PMID: 31786551 DOI: 10.3171/2019.9.focus19616] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/06/2019] [Indexed: 11/06/2022]
Abstract
Numerous recent technological advances offer the potential to substantially enhance the MRI evaluation of moyamoya disease (MMD). These include high-resolution volumetric imaging, high-resolution vessel wall characterization, improved cerebral angiographic and perfusion techniques, high-field imaging, fast scanning methods, and artificial intelligence. This review discusses the current state-of-the-art MRI applications in these realms, emphasizing key imaging findings, clinical utility, and areas that will benefit from further investigation. Although these techniques may apply to imaging of a wide array of neurovascular or other neurological conditions, consideration of their application to MMD is useful given the comprehensive multidimensional MRI assessment used to evaluate MMD. These MRI techniques span from basic cross-sectional to advanced functional sequences, both qualitative and quantitative.The aim of this review was to provide a comprehensive summary and analysis of current key relevant literature of advanced MRI techniques for the evaluation of MMD with image-rich case examples. These imaging methods can aid clinical characterization, help direct treatment, assist in the evaluation of treatment response, and potentially improve the understanding of the pathophysiology of MMD.
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Affiliation(s)
| | | | | | | | | | - James P Klaas
- 3Neurology, Mayo Clinic College of Graduate Medical Education, Rochester, Minnesota
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18
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Hsu YH, Chen YF, Yang SH, Yang CC, Kuo MF. Postoperative change of neuropsychological function after indirect revascularization in childhood moyamoya disease: a correlation with cerebral perfusion study. Childs Nerv Syst 2020; 36:1245-1253. [PMID: 31797068 DOI: 10.1007/s00381-019-04432-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/01/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE The relationships between postoperative functional improvement in various cognitive domains and regional hemodynamic change have not been sufficiently studied in childhood moyamoya disease (MMD). The present study aimed to examine the cognitive benefit of indirect revascularization, the underlying biological mechanism, and factors affecting surgical outcome in childhood MMD. METHODS Twenty-three patients with MMD aged under 20 years received neuropsychological examinations before and after indirect revascularization surgery, evaluating intellectual function, verbal and visual memory, and executive function. Among them, 13 patients had magnetic resonance perfusion (MRP) studies, in which regional cerebral perfusion was rated. RESULTS Postoperative improvement was observed in verbal memory performances (p = 0.02-0.03) and in cerebral perfusion at all 26 cerebral hemispheres (p = 0.003-0.005), especially in the middle cerebral artery (MCA) territories (p = 0.001-0.003). Hemodynamic improvement in the left MCA territories was significantly correlated with improvement of both verbal new learning (p = 0.01) and intellectual function (p = 0.004). Postoperative cognitive improvement of immediate recall and verbal intellectual function was associated with female sex (r = - 0.42) and symptom duration (p = - 0.03), respectively. Hemodynamic improvement in the MCA territories was related to longer follow-up intervals (p = 0.02). CONCLUSION The findings revealed that the selective postoperative cognitive improvement was associated with increased regional perfusion in the MCA territories, and indicate the importance of early intervention and the potential of indirect revascularization regarding long-term outcome.
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Affiliation(s)
- Yen-Hsuan Hsu
- Department of Psychology, National Chung Cheng University, Chiayi County, Taiwan.,Center for Innovative Research on Aging Society (CIRAS), National Chung Cheng University, Chiayi County, Taiwan
| | - Ya-Fang Chen
- Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan.,Department of Medical Imaging, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan
| | - Shih-Hung Yang
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, No. 7, Chung-Shan South Road, Taipei, 10048, Taiwan
| | - Chi-Cheng Yang
- Department of Psychology, National Chengchi University, No. 64, Sec. 2, Zhi-Nan Road, Wenshan District, Taipei, 11605, Taiwan. .,Holistic Social Preventive and Mental Health Center, Taipei City Hospital, Taipei, Taiwan.
| | - Meng-Fai Kuo
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, No. 7, Chung-Shan South Road, Taipei, 10048, Taiwan.
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