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Hori T, Chernov M, Alshebib YA, Kubota Y, Matsuo S, Shiramizu H, Okada Y. Long-term outcomes after surgery for brainstem cavernous malformations: analysis of 46 consecutive cases. J Neurosurg 2022; 138:900-909. [PMID: 36087317 DOI: 10.3171/2022.7.jns22314] [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: 02/06/2022] [Accepted: 07/06/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the long-term outcomes after resection of brainstem cavernous malformations (BSCMs) and to assess the usefulness of the Lawton grading system in these cases. METHODS This retrospective study analyzed 46 consecutive patients with BSCMs operated on between July 1990 and December 2020. Outcomes at the last follow-up were defined as favorable (modified Rankin Scale [mRS] score 0-2) or unfavorable (mRS score > 2). RESULTS The study cohort comprised 24 men (52%) and 22 women (48%), ranging in age from 8 to 78 years old (median 37 years). In 19 patients (41%), the preoperative mRS score was > 2. All patients had hemorrhagic BSCM. There were 12 (26%) mesencephalic, 19 (41%) pontine, 7 (15%) medullary, and 8 (17%) cerebellar peduncle lesions, with a maximal diameter ranging from 5 to 40 mm (median 15 mm). In total, 24 BSCMs (52%) had bilateral extension crossing the brainstem midline. Lawton grades of 0, I, II, III, IV, V, and VI were defined in 3 (7%), 2 (4%), 10 (22%), 11 (24%), 8 (17%), 7 (15%), and 5 (11%) cases, respectively. Total resection of BSCMs was attained in 43 patients (93%). There were no perioperative deaths. Excluding the 3 most recent cases, the length of follow-up ranged from 56 to 365 months. The majority of patients demonstrated good functional recovery, but regress of the preexisting oculomotor nerve deficit was usually incomplete. No new hemorrhagic events were noted after total resection of BSCMs. In 42 patients (91%), the mRS score at the time of last follow-up was ≤ 2 (favorable outcome), and in 18 (39%), it was 0 (absence of neurological symptoms). Forty-four patients (96%) demonstrated clinical improvement and 2 (4%) had no changes compared with the preoperative period. Multivariate analysis revealed that only lower Lawton grade had a statistically significant independent association (p = 0.0280) with favorable long-term outcome. The area under the receiver operating characteristic curve for prediction of favorable outcome with 7 available Lawton grades of BSCM was 0.93. CONCLUSIONS Resection of hemorrhagic BSCMs by an experienced neurosurgeon may be performed safely and effectively, even in severely disabled patients. In the authors' experience, preexisting oculomotor nerve palsy represents the main cause of permanent postoperative neurological morbidity. The Lawton grading system effectively predicts long-term outcome after surgery.
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Affiliation(s)
- Tomokatsu Hori
- 1Department of Neurosurgery, Tokyo Women's Medical University.,3Department of Neurosurgery, Moriyama Memorial Hospital, Tokyo, Japan
| | - Mikhail Chernov
- 2Department of Neurosurgery, Tokyo Women's Medical University Adachi Medical Center; and
| | - Yasir A Alshebib
- 3Department of Neurosurgery, Moriyama Memorial Hospital, Tokyo, Japan
| | - Yuichi Kubota
- 2Department of Neurosurgery, Tokyo Women's Medical University Adachi Medical Center; and
| | - Seigo Matsuo
- 3Department of Neurosurgery, Moriyama Memorial Hospital, Tokyo, Japan
| | - Hideki Shiramizu
- 3Department of Neurosurgery, Moriyama Memorial Hospital, Tokyo, Japan
| | - Yoshikazu Okada
- 1Department of Neurosurgery, Tokyo Women's Medical University
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Xu XY, Li D, Song LR, Liu PP, Wu ZY, Wang L, Zhang LW, Zhang JT, Wu Z. Nomogram for predicting an individual prospective hemorrhage risk in untreated brainstem cavernous malformations. J Neurosurg 2022; 138:910-921. [PMID: 36152323 DOI: 10.3171/2022.8.jns221228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/03/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE
In this study, the authors aimed to create a nomogram for precisely predicting the 5-year prospective hemorrhage risk in brainstem cavernous malformations (BSCMs).
METHODS
Patients with confirmed BSCMs in a single-center prospective observational series from January 2012 to December 2016 were included in the present study for nomogram building and validation. The concordance index (C-index), calibration curves, and decision curve analysis were used to evaluate the predictive accuracy, discriminative ability, and clinical usefulness of the nomogram. Then, a nomogram-based risk stratification model for untreated BSCMs was developed.
RESULTS
In total, 600 patients were included in the study; 417 patients who had been enrolled before July 2015 were divided into the training and validation cohorts, and 183 subsequently enrolled patients were used as the external validation cohort. By applying a backward stepwise procedure in the multivariable Cox model, variables, including prior hemorrhage (HR 1.69), hemorrhage on admission (HR 3.33), lesion size > 1.5 cm (HR 1.84), lesion depth (HR 2.35), crossing the axial midpoint (HR 1.94), and developmental venous anomaly (HR 2.62), were incorporated to develop a nomogram. The Harrell C-index values for a 5-year prospective hemorrhage were 0.752 (95% CI 0.687–0.816), 0.801 (95% CI 0.665–0.936), and 0.758 (95% CI 0.674–0.842) in the training, internal validation, and external validation cohorts, respectively. The nomogram performed well in terms of consistency between prediction and actual observation according to the calibration curve. The patients could be classified into three distinct (low, medium, and high) risk groups using the final score of this nomogram.
CONCLUSIONS
Independent predictors of the 5-year hemorrhage risk in untreated BSCMs were selected to create the first nomogram for predicting individual prospective hemorrhage. The nomogram was able to stratify patients into different risk groups and assist in clinical decision-making.
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Affiliation(s)
- Xiao-Ying Xu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Da Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Lai-Rong Song
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Pan-Pan Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
- Department of Neurosurgery, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Ze-Yu Wu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Liang Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Li-Wei Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Jun-Ting Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
| | - Zhen Wu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing
- China National Clinical Research Center for Neurological Diseases, Beijing; and
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Five-year symptomatic hemorrhage risk of untreated brainstem cavernous malformations in a prospective cohort. Neurosurg Rev 2022; 45:2961-2973. [PMID: 35633420 DOI: 10.1007/s10143-022-01815-2] [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: 01/30/2022] [Revised: 04/23/2022] [Accepted: 05/17/2022] [Indexed: 10/18/2022]
Abstract
Hemorrhage of brainstem cavernous malformation (CM) would cause various symptoms and severe disability. The study aimed to elaborate on the 5-year actuarial cumulative hazard of symptomatic hemorrhage. Patients diagnosed in our institute between 2009 and 2013 were prospectively registered. All clinical data were obtained, follow-up was performed, and risk factors were evaluated. Four hundred sixty-eight patients (217 female, 46.4%) were included in the study with a median follow-up duration of 79.0 months. A total of 137 prospective hemorrhages occurred in 107 patients (22.9%) during 1854.0 patient-years. Multivariate Cox analysis found age ≥ 55 years (hazard ratio (HR) 2.166, p = 0.002), DVA (HR 1.576, p = 0.026), superficial-seated location (HR 1.530, p = 0.047), and hemorrhage on admission (HR 2.419, p = 0.026) as independent risk factors for hemorrhage. The 5-year cumulative hazard of hemorrhage was 30.8% for the overall cohort, 47.8% for 60 patients with age ≥ 55 years, 43.7% for 146 patients with DVA, 37.9% for 272 patients with superficial-seated lesions, and 37.2% for 341 patients with hemorrhage on admission. As a stratified analysis, within subcohort of 341 patients with a hemorrhagic presentation, age ≥ 55 years (HR 3.005, p < 0.001), DVA (HR 1.801, p = 0.010), and superficial-seated location (HR 2.276, p = 0.001) remained independently significant. The 5-year cumulative hazard of hemorrhage was 52.0% for 119 patients with both DVA and hemorrhagic presentation. The 5-year cumulative hemorrhagic risk was 30.8% and was higher in subgroups if harboring risk factors that helped to predict potential hemorrhagic candidates and were useful for treatment decision-making.Clinical Trial Registration-URL: http://www.chictr.org.cn Unique identifier: ChiCTR-POC-17011575.
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Shoubash LI, Marx S, Schroeder HW. Does physical activity provoke CNS cavernomas to become symptomatic? J Neurosurg Sci 2022; 66:168-170. [PMID: 35384435 DOI: 10.23736/s0390-5616.21.05584-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Loay I Shoubash
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany -
| | - Sascha Marx
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
| | - Henry W Schroeder
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
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5
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Ganz JC. Cavernous malformations. PROGRESS IN BRAIN RESEARCH 2022; 268:115-132. [PMID: 35074077 DOI: 10.1016/bs.pbr.2021.10.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Cavernous malformations are relatively common intracerebral malformations of which we only became properly aware after the introduction of MRI. They may be sporadic or familial. Familial CMs may be multiple and new lesions appear over time requiring intermittent MR control. Many sporadic CMs have no symptoms. The commonest location is in the supratentorial cerebral parenchyma presenting with epilepsy. The best treatment is microsurgery. A small proportion are in the brainstem and may rebleed and even be lethal. Treatment includes microsurgery and radiosurgery. Microsurgery cures the patient but has substantial problems with complications, deterioration and partial removal. Radiosurgery has taken time to demonstrate that it can over 2 years substantially reduce the risk of rebleeds without the risks of microsurgery. Both methods have a part to play in the treatment.
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Affiliation(s)
- Jeremy C Ganz
- Department of Neurosurgery, Haukeland University Hospital, Bergen, Norway.
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6
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Santos AN, Rauschenbach L, Saban D, Chen B, Darkwah Oppong M, Herten A, Hadice Gull H, Rieß C, Deuschl C, Schmidt B, Jabbarli R, Wrede KH, Zhu Y, Frank B, Sure U, Dammann P. Multiple Cerebral Cavernous Malformations – Clinical Course of Confirmed, Assumed and Non‐Familial Disease. Eur J Neurol 2022; 29:1427-1434. [DOI: 10.1111/ene.15253] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 01/11/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Alejandro N. Santos
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Laurèl Rauschenbach
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Dino Saban
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Bixia Chen
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Marvin Darkwah Oppong
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Annika Herten
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Hanah Hadice Gull
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Christoph Rieß
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Cornelius Deuschl
- Institute of Diagnostic and Interventional Radiology and Neuroradiology University Hospital Essen Germany
| | - Börge Schmidt
- Institute for Medical Informatics, Biometry and Epidemiology University Hospital of Essen Essen Germany
| | - Ramazan Jabbarli
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Karsten H. Wrede
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Yuan Zhu
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Benedikt Frank
- Department of Neurology University Hospital Essen Germany
| | - Ulrich Sure
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
| | - Philipp Dammann
- Department of Neurosurgery and Spine Surgery University Hospital Essen Essen Germany
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7
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Yang Y, Velz J, Neidert MC, Lang W, Regli L, Bozinov O. The BSCM score: a guideline for surgical decision-making for brainstem cavernous malformations. Neurosurg Rev 2021; 45:1579-1587. [PMID: 34713352 PMCID: PMC8976795 DOI: 10.1007/s10143-021-01679-y] [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: 08/10/2021] [Revised: 10/12/2021] [Accepted: 10/20/2021] [Indexed: 11/07/2022]
Abstract
Microsurgical resection of brainstem cavernous malformations (BSCMs) can be performed today with acceptable morbidity and mortality. However, in this highly eloquent location, the indication for surgery remains challenging. We aimed to elaborate a score system that may help clinicians with their choice of treatment in patients with BSCMs in this study. A single-center series of 88 consecutive BSCMs patients with 272 follow-up visits were included in this study. Univariable and multivariable generalized estimating equations (GEE) were constructed to identify the association of variables with treatment decisions. A score scale assigned points for variables that significantly contributed to surgical decision-making. Surgical treatment was recommended in 37 instances, while conservative treatment was proposed in 235 instances. The mean follow-up duration was 50.4 months, and the mean age at decision-making was 45.9 years. The mean BSCMs size was 14.3 ml. In the multivariable GEE model, patient age, lesion size, hemorrhagic event(s), mRS, and axial location were identified as significant factors for determining treatment options. With this proposed score scale (grades 0–XII), non-surgery was the first option at grades 0–III. The crossover point between surgery and non-surgery recommendations lay between grades V and VI while surgical treatment was found in favor at grades VII–X. In conclusion, the proposed BSCM operating score is a clinician-friendly tool, which may help neurosurgeons decide on the treatment for patients with BSCMs.
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Affiliation(s)
- Yang Yang
- Department of Neurosurgery, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, Ramistrasse 100, CH-8091, Zurich, Switzerland. .,Department of Neurosurgery, Kantonsspital St. Gallen, Rorschacher Strasse 95, CH-9007, St. Gallen, Switzerland.
| | - Julia Velz
- Department of Neurosurgery, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, Ramistrasse 100, CH-8091, Zurich, Switzerland
| | - Marian C Neidert
- Department of Neurosurgery, Kantonsspital St. Gallen, Rorschacher Strasse 95, CH-9007, St. Gallen, Switzerland
| | - Wei Lang
- Department of Geriatric Medicine, University Hospital Zurich, City Hospital Waid Zurich, Tiechestrasse 99, CH-8037, Zurich, Switzerland
| | - Luca Regli
- Department of Neurosurgery, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, Ramistrasse 100, CH-8091, Zurich, Switzerland
| | - Oliver Bozinov
- Department of Neurosurgery, Kantonsspital St. Gallen, Rorschacher Strasse 95, CH-9007, St. Gallen, Switzerland
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8
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Jean WC, Davis GL. How I do it: Subtemporal transtentorial approach for cavernous malformation of the pons. Acta Neurochir (Wien) 2021; 163:1751-1756. [PMID: 32562122 DOI: 10.1007/s00701-020-04457-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 06/10/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Removal of a pontine cavernous malformation requires sufficient exposure since any restriction on surgical freedom may lead to suboptimal visualization of the lesion, injury to the brainstem, and neurological catastrophe. METHODS We describe and demonstrate the subtemporal transtentorial approach to a cavernous malformation of the upper pons, with emphasis on adequate surgical exposure while avoiding the need for extensive bone removal of the skull base. CONCLUSIONS The meticulous technique is paramount to the successful removal of any brainstem cavernous malformation. Along with the surgical exposure, delicate handling of the malformation is demonstrated in the accompanying operative video.
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Affiliation(s)
- Walter C Jean
- Department of Neurosurgery, George Washington University, 2150 Pennsylvania Avenue, 7th floor, Washington, DC, 20037, USA.
| | - Gregory L Davis
- Department of Neurosurgery, George Washington University, 2150 Pennsylvania Avenue, 7th floor, Washington, DC, 20037, USA
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9
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Fermeli DD, Theofanopoulos A, Papadakos D, Boulieris S, Constantoyannis C. Hemorrhage of a Cavernous Hemangioma of the Brainstem Presenting with Fever of Unknown Origin: A Case Report. AMERICAN JOURNAL OF CASE REPORTS 2021; 22:e930437. [PMID: 34031354 PMCID: PMC8165496 DOI: 10.12659/ajcr.930437] [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] [Indexed: 11/18/2022]
Abstract
Patient: Male, 42-year-old Final Diagnosis: Brainstem cavernoma Symptoms: Headache • fever Medication: — Clinical Procedure: — Specialty: Neurosurgery
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Affiliation(s)
- Dionysia D Fermeli
- Department of Neurosurgery, University Hospital of Patras, Patras, Greece
| | | | | | - Spiros Boulieris
- Department of Neurosurgery, University Hospital of Patras, Patras, Greece
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10
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Beucler N, Boissonneau S, Ruf A, Fuentes S, Carron R, Dufour H. Crossed brainstem syndrome revealing bleeding brainstem cavernous malformation: an illustrative case. BMC Neurol 2021; 21:204. [PMID: 34016062 PMCID: PMC8136125 DOI: 10.1186/s12883-021-02223-7] [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: 12/07/2020] [Accepted: 05/04/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Since the nineteenth century, a great variety of crossed brainstem syndromes (CBS) have been described in the medical literature. A CBS typically combines ipsilateral cranial nerves deficits to contralateral long tracts involvement such as hemiparesis or hemianesthesia. Classical CBS seem in fact not to be so clear-cut entities with up to 20% of patients showing different or unnamed combinations of crossed symptoms. In terms of etiologies, acute brainstem infarction predominates but CBS secondary to hemorrhage, neoplasm, abscess, and demyelination have been described. The aim of this study was to assess the proportion of CBS caused by a bleeding episode arising from a brainstem cavernous malformation (BCM) reported in the literature. CASE PRESENTATION We present the case of a typical Foville syndrome in a 65-year-old man that was caused by a pontine BCM with extralesional bleeding. Following the first bleeding episode, a conservative management was decided but the patient had eventually to be operated on soon after the second bleeding event. DISCUSSION A literature review was conducted focusing on the five most common CBS (Benedikt, Weber, Foville, Millard-Gubler, Wallenberg) on Medline database from inception to 2020. According to the literature, hemorrhagic BCM account for approximately 7 % of CBS. Microsurgical excision may be indicated after the second bleeding episode but needs to be carefully weighted up against the risks of the surgical procedure and openly discussed with the patient. CONCLUSIONS In the setting of a CBS, neuroimaging work-up may not infrequently reveal a BCM requiring complex multidisciplinary team management including neurosurgical advice.
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Affiliation(s)
- Nathan Beucler
- Department of Neurosurgery, Timone University Hospital, APHM, 264 rue Saint-Pierre, 13005, Marseille, France. .,Ecole du Val-de-Grâce, French Military Health Service Academy, 1 place Alphonse Laveran, 75230, Paris Cedex 5, France.
| | - Sébastien Boissonneau
- Department of Neurosurgery, Timone University Hospital, APHM, 264 rue Saint-Pierre, 13005, Marseille, France.,Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - Aurélia Ruf
- Emergency Department, Timone University Hospital, APHM, 264 Rue Saint-Pierre, 13005, Marseille, France
| | - Stéphane Fuentes
- Department of Neurosurgery, Timone University Hospital, APHM, 264 rue Saint-Pierre, 13005, Marseille, France
| | - Romain Carron
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France.,Department of Stereotactic and Functional Neurosurgery, Timone University Hospital, APHM, 264 rue Saint-Pierre, 13005, Marseille, France
| | - Henry Dufour
- Department of Neurosurgery, Timone University Hospital, APHM, 264 rue Saint-Pierre, 13005, Marseille, France.,Aix-Marseille Univ, INSERM, MMG, Marseille, France
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11
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Li D, Zheng JJ, Weng JC, Liu PP, Wu ZY, Zhang LW, Zhang JT, Wang L, Wu Z. Neurological outcomes of untreated brainstem cavernous malformations in a prospective observational cohort and literature review. Stroke Vasc Neurol 2021; 6:501-510. [PMID: 33737399 PMCID: PMC8717781 DOI: 10.1136/svn-2020-000608] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 02/02/2021] [Accepted: 02/21/2021] [Indexed: 11/24/2022] Open
Abstract
Background Haemorrhages of brainstem cavernous malformations (CMs) can lead to neurological deficits, the natural history of which is uncertain. The study aimed to evaluate the neurological outcomes of untreated brainstem CMs and to identify the adverse factors associated with worsened outcomes. Methods From 2009 to 2015, 698 patients (321 women) with brainstem CMs were entered into the prospective cohort after excluding patients lost to follow-up (n=43). All patients were registered, clinical data were collected and scheduled follow-up was performed. Results After a median follow-up of 60.9 months, prospective haemorrhages occurred in 167 patients (23.9%). The mean modified Rankin Scale scores at enrolment and at censoring time were 1.6 and 1.2. Neurological status was improved, unchanged and worsened in 334 (47.9%), 293 (42.0%) and 71 (10.2%) patients, respectively; 233 (33.4%) recovered to normal levels. Lesions crossing the axial midpoint (relative risk (RR) 2.325, p=0.003) and developmental venous anomaly (DVA) (RR 1.776, p=0.036) were independently significantly related to worsened outcomes. The percentage of worsened outcomes was 5.3% (18 of 337) in low-risk patients (neither DVA nor crossing the axial point) and increased to 26.0% (13 of 50) in high-risk patients (with both DVA and crossing the axial point). The percentage of worsened outcomes significantly increased as the number of prospective haemorrhages increased (from 1.5% (8 of 531, if 0 prospective ictus) to 37.5% (48 of 128, if 1 ictus) and 38.5% (15 of 39, if >1 ictus)). Conclusions The neurological outcomes of untreated brainstem CMs were improved/unchanged in majority of patients (89.8%) with a fatality rate of 1.7% in our cohort, which seemed to be favourable. Radiological features significantly predicted worsened outcomes. Our results provide evidence for clinical consultation and individualised treatment. The referral bias of our cohort was underlined.
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Affiliation(s)
- Da Li
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jing-Jie Zheng
- Obstetrics and Gynecology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jian-Cong Weng
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Pan-Pan Liu
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ze-Yu Wu
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Li-Wei Zhang
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun-Ting Zhang
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Liang Wang
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhen Wu
- Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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12
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Li D, Wu ZY, Liu PP, Ma JP, Huo XL, Wang L, Zhang LW, Wu Z, Zhang JT. Natural history of brainstem cavernous malformations: prospective hemorrhage rate and adverse factors in a consecutive prospective cohort. J Neurosurg 2021; 134:917-928. [PMID: 32168479 DOI: 10.3171/2019.12.jns192856] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 12/30/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Given the paucity of data on the natural history of brainstem cavernous malformations (CMs), the authors aimed to evaluate the annual hemorrhage rate and hemorrhagic risk of brainstem CMs. METHODS Nine hundred seventy-nine patients diagnosed with brainstem CMs were referred to Beijing Tiantan Hospital from 2006 to 2015; 224 patients were excluded according to exclusion criteria, and 47 patients were lost to follow-up. Thus, this prospective observational cohort included 708 cases (324 females). All patients were registered, clinical data were recorded, and follow-up was completed. RESULTS Six hundred ninety (97.5%) of the 708 patients had a prior hemorrhage, 514 (72.6%) had hemorrhagic presentation, and developmental venous anomaly (DVA) was observed in 241 cases (34.0%). Two hundred thirty-seven prospective hemorrhages occurred in 175 patients (24.7%) during 3400.2 total patient-years, yielding a prospective annual hemorrhage rate of 7.0% (95% CI 6.2%-7.9%), which decreased to 4.7% after the 1st year. Multivariate Cox regression analysis after adjusting for sex and age identified hemorrhagic presentation (HR 1.574, p = 0.022), DVA (HR 1.678, p = 0.001), mRS score ≥ 2 on admission (HR 1.379, p = 0.044), lesion size > 1.5 cm (HR 1.458, p = 0.026), crossing the axial midpoint (HR 1.446, p = 0.029), and superficially seated location (HR 1.307, p = 0.025) as independent adverse factors for prospective hemorrhage, but history of prior hemorrhage was not significant. The annual hemorrhage rates were 8.3% and 4.3% in patients with and without hemorrhagic presentation, respectively; the rate was 9.9%, 6.0%, and 1.0% in patients with ≥ 2, only 1, and 0 prior hemorrhages, respectively; and the rate was 9.2% in patients with both hemorrhagic presentation and focal neurological deficit on admission. CONCLUSIONS The study reported an annual hemorrhage rate of 7.0% exclusively for brainstem CMs, which significantly increased if patients presented with both hemorrhagic presentation and focal neurological deficit (9.2%), or any other risk factor. Patients with a risk factor for hemorrhage needed close follow-up regardless of the number of prior hemorrhages. It should be noted that the referral bias in this study could have overestimated the annual hemorrhage rate. This study improved the understanding of the natural history of brainstem CMs, and the results are important for helping patients and physicians choose a suitable treatment option based on the risk factors and stratified annual rates.Clinical trial registration no.: ChiCTR-POC-17011575 (http://www.chictr.org.cn/).
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Affiliation(s)
- Da Li
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Ze-Yu Wu
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Pan-Pan Liu
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
- 2Department of Neurosurgery, The Municipal Hospital of Weihai, People's Republic of China
| | - Jun-Peng Ma
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Xu-Lei Huo
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Liang Wang
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Li-Wei Zhang
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Zhen Wu
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
| | - Jun-Ting Zhang
- 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing; and
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13
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Abhinav K, Nielsen TH, Singh R, Weng Y, Han SS, Iv M, Steinberg GK. Utility of a Quantitative Approach Using Diffusion Tensor Imaging for Prognostication Regarding Motor and Functional Outcomes in Patients With Surgically Resected Deep Intracranial Cavernous Malformations. Neurosurgery 2020; 86:665-675. [PMID: 31360998 DOI: 10.1093/neuros/nyz259] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/15/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Resection of deep intracranial cavernous malformations (CMs) is associated with a higher risk of neurological deterioration and uncertainty regarding clinical outcomes. OBJECTIVE To examine diffusion tractography imaging (DTI) data evaluating the corticospinal tract (CST) in relation to motor and functional outcomes in patients with surgically resected deep CMs. METHODS Perilesional CST was characterized as disrupted, displaced, or normal. Mean fractional anisotropy (FA) values were obtained for whole ipsilateral CST and in 3 regions: subcortical (proximal), perilesional, and distally. Mean FA values in anatomically equivalent regions in the contralateral CST were obtained. Clinical and radiological data were collected independently. Multivariable regression analysis was used for statistical analysis. RESULTS A total of 18 patients [brainstem (15) and thalamus/basal ganglia (3); median follow-up: 270 d] were identified over 2 yr. The CST was identified preoperatively as disrupted (6), displaced (8), and normal (4). Five of 6 patients with disruption had weakness. Higher preoperative mean FA values for distal ipsilateral CST segment were associated with better preoperative lower (P < .001), upper limb (P = .004), postoperative lower (P = .005), and upper limb (P < .001) motor examination. Preoperative mean FA values for distal ipsilateral CST segment (P = .001) and contralateral perilesional CST segment (P < .001) were negatively associated with postoperative modified Rankin scale scores. CONCLUSION Lower preoperative mean FA values for overall and defined CST segments corresponded to worse patient pre- and postoperative motor examination and/or functional status. FA value for the distal ipsilateral CST segment has prognostic potential with respect to clinical outcomes.
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Affiliation(s)
- Kumar Abhinav
- Stanford Stroke Center, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Troels H Nielsen
- Stanford Stroke Center, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Rhea Singh
- Quantitative Sciences Unit, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Yingjie Weng
- Quantitative Sciences Unit, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Summer S Han
- Stanford Stroke Center, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California.,Quantitative Sciences Unit, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Michael Iv
- Division of Neuroradiology, Department of Radiology, Stanford University School of Medicine, Stanford, California
| | - Gary K Steinberg
- Stanford Stroke Center, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
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14
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Herten A, Chen B, Saban D, Santos A, Wrede K, Jabbarli R, Zhu Y, Schmidt B, Kleinschnitz C, Forsting M, Sure U, Dammann P. Health-related quality of life in patients with untreated cavernous malformations of the central nervous system. Eur J Neurol 2020; 28:491-499. [PMID: 32961598 DOI: 10.1111/ene.14546] [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: 06/11/2020] [Accepted: 09/05/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND PURPOSE To estimate health-related quality of life (HRQOL) in patients with untreated cavernous malformation of the CNS [cavernous cerebral malformations (CCMs)]. METHODS We performed a cross-sectional observational study on patients with CCMs admitted to our department from 1 November 2017 to 10 January 2020 using standardized interviews [short-form-36 questionnaire, hospital anxiety and depression score (HADS-A/D), CCM perception questionnaire]. Included criteria were diagnosis of an untreated CCM and information about the diagnosis in a specialized CCM consultation. Health-related quality of life (HRQOL) data were analyzed and compared to the German normal population. Uni- and multivariate analyses were carried out to identify variables with impact on outcome. RESULTS Two hundred nineteen (93%) of 229 eligible patients were included. Mean age was 46.3 ± 14.7 (18-86) years; 136 (62%) were female. Ninety-eight (45%) patients presented with symptomatic hemorrhage (SH), and 17 (8%) with repetitive SH. Ninety-two (42%) patients were asymptomatic. Thirty-seven patients (17%) suffered from cavernoma-related epilepsy. Twenty-eight patients (13%) suffered from familial CCMs. Patients showed significantly decreased component scores and subdomain scores compared to the normal population, with effects ranging from small to large. This accounted largely also for asymptomatic patients (except for physical component score and main physical subdomains). Multivariate regression analysis confirmed impact of functional impairment on physical component score. HADS-A was significantly increased. HADS-A/D strongly correlated with mental component score and individual perception of the CCM. CONCLUSIONS Patients with the diagnosis of a CCM showed decreased HRQOL compared to the normal population even when not suffering functional impairment or neurological symptoms. Our data may function as benchmarks in evaluation of different (future) management strategies.
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Affiliation(s)
- A Herten
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - B Chen
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - D Saban
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - A Santos
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - K Wrede
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - R Jabbarli
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - Y Zhu
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - B Schmidt
- Institute for Medical Informatics, Biometry and Epidemiology, University Hospital of Essen, Essen, Germany
| | - C Kleinschnitz
- Department of Neurology, University Hospital Essen, Essen, Germany
| | - M Forsting
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany
| | - U Sure
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
| | - P Dammann
- Department of Neurosurgery, University Hospital Essen, Essen, Germany
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15
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Chen B, Herten A, Saban D, Rauscher S, Radbruch A, Schmidt B, Zhu Y, Jabbarli R, Wrede KH, Kleinschnitz C, Sure U, Dammann P. Hemorrhage from cerebral cavernous malformations. Neurology 2020; 95:e89-e96. [DOI: 10.1212/wnl.0000000000009730] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/27/2020] [Indexed: 11/15/2022] Open
Abstract
ObjectiveTo determine the role of associated developmental venous anomalies (DVAs) in intracranial hemorrhage (ICH) caused by cerebral cavernous malformations (CCMs).MethodsWe analyzed patient registry data of 1,219 patients with cavernous malformations treated in our institution between 2003 and 2018. Patients with spinal and familial CCM and patients without complete MRI data were excluded. The impact of various variables on ICH as a mode of presentation was assessed with multivariate binary logistic regression analysis. Kaplan Meier/Cox regression analysis was performed to analyze cumulative 5-year-risk for (re)hemorrhage and to identify baseline predictors of this outcome.ResultsSeven hundred thirty-one patients with CCM were included. Multivariate logistic regression confirmed a statistically significant negative correlation with DVA (odds ratio [OR] 0.635 [95% confidence interval (CI) 0.459–0.878]) and positive correlation with brainstem localization (OR 6.277 [95% CI 4.287–9.191]) with ICH as the mode of presentation. Among 731 patients, 76 experienced (re)hemorrhage during 2,338 person-years of follow-up. Overall cumulative 5-year risk was 24.1% (95% CI 21.1%–27.5%). Cox regression analysis revealed initial presentation with ICH (hazard ratio [HR] 8.0 [95% CI 3.549–18.122]) and brainstem localization (HR 2.9 [95% CI 1.756–4.765]) as independent baseline predictors of (re)hemorrhage. Presence of DVA added no independent prognostic information (HR 1.1 [95% CI 0.717–1.885]).ConclusionPatients with CCM with associated DVA are at lower risk to present with ICH. During untreated 5-year follow-up, they showed equal (re)hemorrhage risk compared to patients with CCM without DVA.
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16
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Zheng JJ, Liu PP, Wang L, Zhang LW, Zhang JT, Li D, Wu Z, Wu YM. Natural history of incidentally diagnosed brainstem cavernous malformations in a prospective observational cohort. Neurosurg Rev 2020; 44:1151-1164. [PMID: 32399728 DOI: 10.1007/s10143-020-01308-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 03/21/2020] [Accepted: 04/26/2020] [Indexed: 12/18/2022]
Abstract
There was a lack of natural history of incidental brainstem cavernous malformations (CMs), hemorrhage of which would lead to severe neuropathies. The study aimed to evaluate the prospective hemorrhage rate and neurological outcome of the disease. This prospective cohort included patients with incidental brainstem CMs referred to our institute from 2009 to 2015. The diagnosis was confirmed based on the patients' complain, physical examination, and radiographic evidence. Clinical data were collected, scheduled follow-up was performed, and the independent risk factors were identified by multivariate analysis. This cohort included 48 patients (22 female, 45.8%). The median follow-up duration was 60.7 months, and 13 prospective hemorrhages occurred within 244.0 patient-years yielding an annual hemorrhage rate of 5.3%. The hemorrhage-free survival at 1 and 5 years was 91.6% and 80.6%. Age ≥ 55 years (hazard ratio (HR) = 8.59, p = 0.003), lesion size (per 1-mm increase) (HR = 3.55, p = 0.041), developmental venous anomaly (HR = 10.28, p = 0.017), and perilesional edema (HR = 4.90, p = 0.043) were independent risk factors for hemorrhage. Seven patients (14.6%) received surgical resection, and the other 41 patients remained under observation. Neurological function was improved in 22 patients (45.8%), unchanged in 19 (39.6%), and worsened in 7 (14.6%). Prospective hemorrhage (odds ratio = 14.95, p = 0.037) was the only independent risk factor for worsened outcomes. The natural history of incidental brainstem CMs seemed to be acceptable with improved/unchanged outcomes in most patients (85.4%). These results improved our understanding of the disease, and the future study of a large cohort was required to verify our findings.
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Affiliation(s)
- Jing-Jie Zheng
- Department of Gynecologic Oncology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Pan-Pan Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Nansihuan Xilu 119, Fengtai District, Beijing, People's Republic of China
- Department of Neurosurgery, The Municipal Hospital of Weihai, No. 70 Heping Road, Huancui District, Weihai, People's Republic of China
| | - Liang Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Nansihuan Xilu 119, Fengtai District, Beijing, People's Republic of China
| | - Li-Wei Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Nansihuan Xilu 119, Fengtai District, Beijing, People's Republic of China
| | - Jun-Ting Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Nansihuan Xilu 119, Fengtai District, Beijing, People's Republic of China
| | - Da Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Nansihuan Xilu 119, Fengtai District, Beijing, People's Republic of China.
| | - Zhen Wu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Nansihuan Xilu 119, Fengtai District, Beijing, People's Republic of China.
| | - Yu-Mei Wu
- Department of Gynecologic Oncology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China.
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17
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Hartley BR, Birnbaum C, Hoffman CE. Cavernous malformation hemorrhage due to trans-mural pressure alterations after cerebrospinal fluid diversion: a case report. BMC Neurol 2020; 20:131. [PMID: 32284039 PMCID: PMC7153234 DOI: 10.1186/s12883-020-01714-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 04/01/2020] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Cavernous malformations are rare cerebral pseudo-vascular lesions with annualized bleeding rates of 0.5-3% in most studies. Of the various explored risk factors for bleeding to date, only prior hemorrhage has shown significant correlation. CASE PRESENTATION In this case, we describe a 65-year old man with a peri-ventricular atrial cavernous malformation that hemorrhaged after CSF diversion via ventriculoperitoneal shunting. Serial imaging showed that bleeding continued until the shunt was revised with a programmable valve set at maximum resistance with the addition of a gravitational unit, thereby lowering the trans-mural pressure differential across the cavernous malformation. CONCLUSIONS Given that other vascular lesions are subject to hemorrhage from alterations in trans-mural pressure dynamics, we hypothesize that cavernous malformations are similarly affected by trans-mural pressure gradients as they are composed of primitive vascular elements. This hypothesis is corroborated by the temporal correlation of interventions, imaging, and exam findings in the present case, and suggests a potentially important risk factor for hemorrhage in CM patients that affects prognostication and management.
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Affiliation(s)
- Benjamin R. Hartley
- Department of Neurosurgery, Weill-Cornell College of Medicine/New York Presbyterian Hospital, 525 East 68th Street, Box, New York, NY 99 USA
| | | | - Caitlin E. Hoffman
- Department of Neurosurgery, Weill-Cornell College of Medicine/New York Presbyterian Hospital, 525 East 68th Street, Box, New York, NY 99 USA
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18
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Polster SP, Cao Y, Carroll T, Flemming K, Girard R, Hanley D, Hobson N, Kim H, Koenig J, Koskimäki J, Lane K, Majersik JJ, McBee N, Morrison L, Shenkar R, Stadnik A, Thompson RE, Zabramski J, Zeineddine HA, Awad IA. Trial Readiness in Cavernous Angiomas With Symptomatic Hemorrhage (CASH). Neurosurgery 2020; 84:954-964. [PMID: 29660039 DOI: 10.1093/neuros/nyy108] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 03/06/2018] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Brain cavernous angiomas with symptomatic hemorrhage (CASH) are uncommon but exact a heavy burden of neurological disability from recurrent bleeding, for which there is no proven therapy. Candidate drugs to stabilize the CASH lesion and prevent rebleeding will ultimately require testing of safety and efficacy in multisite clinical trials. Much progress has been made in understanding the epidemiology of CASH, and novel biomarkers have been linked to the biological mechanisms and clinical activity in lesions. Yet, the ability to enroll and risk-stratify CASH subjects has never been assessed prospectively at multiple sites. Biomarkers and other outcomes have not been evaluated for their sensitivity and reliability, nor have they been harmonized across sites. OBJECTIVE To address knowledge gaps and establish a research network as infrastructure for future clinical trials, through the Trial Readiness grant mechanism, funded by National Institute of Neurological Disorders and Stroke/National Institutes of Health. METHODS This project includes an observational cohort study to assess (1) the feasibility of screening, enrollment rates, baseline disease categorization, and follow-up of CASH using common data elements at multiple sites, (2) the reliability of imaging biomarkers including quantitative susceptibility mapping and permeability measures that have been shown to correlate with lesion activity, and (3) the rates of recurrent hemorrhage and change in functional status and biomarker measurements during prospective follow-up. EXPECTED OUTCOMES We propose a harmonized multisite assessment of enrollment rates of CASH, baseline features relevant to stratification in clinical trials, and follow-up assessments of functional outcomes in relation to clinical bleeds. We introduce novel biomarkers of vascular leak and hemorrhage, with firm mechanistic foundations, which have been linked to clinical disease activity. We shall test their reliability and validity at multiple sites, and assess their changes over time, with and without clinical rebleeds, hence their fitness as outcome instruments in clinical trials. DISCUSSION The timing cannot be more opportune, with therapeutic targets identified, exceptional collaboration among researchers and the patient community, along with several drugs ready to benefit from development of a path to clinical testing using this network in the next 5 years.
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Affiliation(s)
- Sean P Polster
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Ying Cao
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Timothy Carroll
- Department of Diagnostic Radiology, The University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Kelly Flemming
- Department of Neurology, Mayo Clinic, Rochester, Minnesota
| | - Romuald Girard
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Daniel Hanley
- Division of Brain Injury Outcomes, Department of Neurology, Johns Hopkins University Medical Institutions, Baltimore, Maryland
| | - Nicholas Hobson
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Helen Kim
- Center for Cerebrovascular Research, Department of Anesthesiology, University of California San Francisco, San Francisco, California
| | - James Koenig
- National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
| | - Janne Koskimäki
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Karen Lane
- Division of Brain Injury Outcomes, Department of Neurology, Johns Hopkins University Medical Institutions, Baltimore, Maryland
| | | | - Nichol McBee
- Division of Brain Injury Outcomes, Department of Neurology, Johns Hopkins University Medical Institutions, Baltimore, Maryland
| | - Leslie Morrison
- Department of Neurology, University of New Mexico, Albuquerque, New Mexico
| | - Robert Shenkar
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Agnieszka Stadnik
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Richard E Thompson
- Division of Brain Injury Outcomes, Department of Neurology, Johns Hopkins University Medical Institutions, Baltimore, Maryland
| | - Joseph Zabramski
- Department of Neurological Surgery, The Barrow Neurological Institute, Phoenix, ArizonaAll except the first and final author are listed in alphabetic order
| | - Hussein A Zeineddine
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Issam A Awad
- Neurovascular Surgery Program, Section of Neurosurgery, Department of Surgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
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19
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Hemorrhage owing to cerebral cavernous malformation: imaging, clinical, and histopathological considerations. Jpn J Radiol 2020; 38:613-621. [PMID: 32221793 DOI: 10.1007/s11604-020-00949-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 03/05/2020] [Indexed: 10/24/2022]
Abstract
Cavernous malformation (CM) is the second most common cerebral vascular malformation and is often found incidentally. Their natural history is usually benign, however, patients with CM who present with symptomatic hemorrhage may later follow a serious clinical course if left untreated. The risk of hemorrhage is associated with previous hemorrhage, lesion location (infratentorial and deep), and the presence of associated developmental venous anomaly (DVA). Histopathological specimens also indicate that coexistence of DVA and other vascular malformations may be associated with hemorrhage owing to CMs. Diagnosing CMs is difficult, even in patients who initially present with symptomatic hemorrhage. Computed tomography scans typically reveal a hemorrhagic CM as a nonspecific heterogenous mass of high density, which may not be misdiagnosed as a solitary hematoma, especially when located in the infratentorial region. Magnetic resonance imaging demonstrates internal loculation with mixed-signal intensities typical for CMs, although this may be partially or completely masked by acute hemorrhage. Susceptibility-weighted imaging (SWI) reveals a significant "blooming" effect of hemosiderin deposition. Three-dimensional postcontrast T1-weighted imaging is essential to identify associated DVAs, and this is important for both diagnosis and planning of surgical treatment. Contrast-enhanced MRI should be performed to diagnose hemorrhagic CMs and differentiate them from spontaneous solitary hematoma or hemorrhagic tumors.
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20
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The Influence of Physical Activity on Cavernous Malformation Hemorrhage. J Stroke Cerebrovasc Dis 2020; 29:104629. [PMID: 32147026 DOI: 10.1016/j.jstrokecerebrovasdis.2019.104629] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/18/2019] [Accepted: 12/22/2019] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND AND AIM Cavernous malformations are low-flow vascular malformations of the central nervous system. Brainstem location and prior hemorrhage increase future hemorrhage risk. We sought to determine the influence of physical activity on hemorrhage risk. METHODS Consecutive patients with radiologically confirmed cavernous malformations participated in a prospective registry with structured, baseline interviews, surveys, and examinations. Patients were asked about unusual events prior to initial clinical presentation. Medical records and MRIs were reviewed. Patients were surveyed about their physical activity after receiving their diagnosis. Annual follow-up surveys to patients ascertained new hemorrhages. Follow-up terminated at last follow-up, hemorrhage, surgery, or death. Univariate analysis assessed the risk of physical activities on prospective hemorrhage. RESULTS Of 195 patients, 117 (60%) were female. Median diagnosis age was 41 years. After diagnosis, 103 (52.8%) patients returned the physical activity survey (cerebral n = 100; spine n = 3). Over 539.4 patient years, 23 had a prospective hemorrhage. Five patients were removed from analysis because they had less than 6 weeks of physical-activity exposure before censor. The remaining 98 had no difference in prospective hemorrhage risk than those patients participating greater than or equal to 3 times monthly in walking, running, greater than 20-pound or less than 20-pound weight lifting, or noncontact sports. Few (n = 5) reported contact-sport participation, scuba diving (n = 2), or high-altitude climbing (n = 1) greater than 3 times monthly. CONCLUSIONS Aerobic activity and noncontact sports do not increase hemorrhage risk in cerebral cavernous malformation; patients should not be restricted. Less is known about contact sports, high-altitude climbing, scuba diving, and those with spinal-cord cavernous malformation.
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21
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Yuen J, Whitfield PC. Brainstem cavernous malformations - no longer a forbidden territory? A systemic review of recent literature. Neurochirurgie 2020; 66:116-126. [PMID: 32112802 DOI: 10.1016/j.neuchi.2019.12.006] [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: 05/21/2019] [Revised: 11/21/2019] [Accepted: 12/17/2019] [Indexed: 10/24/2022]
Abstract
BACKGROUND Due to its eloquent location and potentially devastating neurological consequences, the management of brainstem cavernous malformations (CCMs) attracts considerable debate. There is currently a paucity of Level 1 evidence for their management. The aim of this literature review is to explore the current evidence on the risk-benefit profile of different management options. METHODS A systemic literature search, following the PRISMA algorithm was performed on publications between 2010 and 2018 using the Pubmed database, with the relevant keywords. Only English articles were included. Articles focusing on spinal CCMs and studies with less than 30 participants were excluded. RESULTS A total of 222 search results were reviewed and after removal of duplicates and screening of abstracts, 28 clinical papers comprising 30 or more brainstem CCM cases were included in the study. The heterogeneity of the publications precluded a formal meta-analysis of results. The general consensus is that for CCMs presenting with severe symptoms and/or multiple haemorrhages that reach an accessible pial surface, surgery is considered to be the gold-standard treatment, with some authors suggesting the optimal timing to be within two to six weeks of ictus. For those patients with multiple, deep-seated CCM related haemorrhages that do not reach the pial surface, stereotactic radiosurgery (SRS) can be considered. Conservative treatment is generally considered in incidental cases. Management of brainstem cavernomas of other categories still remains controversial. CONCLUSIONS Due to their highly eloquent location, brainstem CCMs are challenging lesions to manage. Management must be balanced by the risk-benefit profile and tailored to the individual patients and their treating clinicians. This review provides a comprehensive reference considering all treatment options and provides a basis for evidence-based patient counselling.
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Affiliation(s)
- J Yuen
- South West Neurosurgery Centre, Derriford Hospital, Plymouth Devon, UK PL6 8DH.
| | - P C Whitfield
- South West Neurosurgery Centre, Derriford Hospital, Plymouth Devon, UK PL6 8DH
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22
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A rupture risk analysis of cerebral cavernous malformation associated with developmental venous anomaly using susceptibility-weighted imaging. Neuroradiology 2019; 62:39-47. [PMID: 31482190 DOI: 10.1007/s00234-019-02274-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/29/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE To search for the risk factors closely related to cerebral cavernous malformation associated with developmental venous anomaly (CCM-DVA) lesions rupture, laying foundations for the development of reasonable individual treatment plans for patients. METHODS In this retrospective study, we collected CCM-DVA patients who met the inclusion criteria in our outpatient department from 2014 to 2017, MRI scans were performed including susceptibility-weighted imaging (SWI) and contrast-enhanced imaging, characteristics and basic clinical information were collected then statistically analyzed, CCM-DVA lesions were divided into 3 types according to the location and quantitative relationship between CCM and DVA. RESULTS A total number of 319 adult patients were identified with 41.2±11.9 years on average, though univariate and multivariate regression analysis, ruptured presentations were more common in patients with prior hemorrhage (p=0.003), type III CCM-DVA lesions (p=0.001), lesions volume>1 cm3 (p<0.001), infratentorial lesions especially located in midbrain (p=0.019), pontine (p=0.007), medulla (p=0.015). Caplan-Meier curve shows a lower Hemorrhage-free survival rate on patients with type III CCM-DVA lesions (log-rank, p=0.0222), functional area lesions (log-rank, p<0.001), lesions volume>1 cm3 (log-rank, p<0.001), infratentorial lesions (log-rank, p=0.0002). CONCLUSION The classification based on the relationship between CCM and DVA may be meaningful to predict the risk of lesion rupture and CCM lesions next to DVA distal branches showed a higher risk of rupture.
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23
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Kalani MYS, Lawton MT, Spetzler RF. Letter to the Editor. Radiosurgery for cerebral cavernous malformations: a word of caution. J Neurosurg 2019; 130:2086-2090. [PMID: 30485201 DOI: 10.3171/2018.8.jns182284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- M Yashar S Kalani
- 1University of Virginia School of Medicine, Charlottesville, VA; and
| | - Michael T Lawton
- 2Barrow Neurological Institute, St. Joseph's Hospital, Phoenix, AZ
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Nagy G, Burkitt W, Stokes SS, Bhattacharyya D, Yianni J, Rowe JG, Kemeny AA, Radatz MWR. Contemporary radiosurgery of cerebral cavernous malformations: Part 1. Treatment outcome for critically located hemorrhagic lesions. J Neurosurg 2019; 130:1817-1825. [PMID: 30052154 DOI: 10.3171/2017.5.jns17776] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 05/30/2017] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Long-term benefits of radiosurgery (RS) applying modern protocols to treat cavernous malformations (CMs) remain unclear as critics may consider the decrease in the rebleed rate generally observed 2 years after RS as a reflection of the lesion's natural history. The authors adopted an early intention-to-treat attitude since rehemorrhage from deep-seated CMs ultimately leads to stepwise neurological deterioration. The safety of this early policy was previously demonstrated. Here, the authors revisit their current practice in a larger population with a longer follow-up time to assess the long-term effects of RS in the context of current knowledge on the natural history of CMs. METHODS The authors conducted a retrospective analysis of 210 patients with 210 hemorrhagic CMs located in the brainstem, thalamus, or basal ganglia and treated with Gamma Knife RS between 1995 and 2014. Two hundred six patients had available follow-up, which was a median of 5.5 years (range 1-20 years). The median age was 37 years (0.5-77 years) at presentation and 43 (2-78) at treatment. One hundred twenty-seven CMs had bled once and 83 had had multiple hemorrhages prior to treatment. RESULTS The lifetime annual bleed rate of CMs having a single hemorrhage prior to treatment was 2.4% per lesion. The hemorrhage rate stabilized at 1.1% after a temporary increase of 4.3% within the first 2 years after RS. The annual pretreatment hemorrhage rate was 2.8% for the lesions having multiple bleeds prior to RS with a pretreatment rebleed rate of 20.7% and with a modest gradual decrease within the first 5 years and remaining stable at 11.55% thereafter. The rebleed rate fell to 7.9% for the first 2 years after RS and declined further to 1.3% thereafter, which was significantly lower than the long-term pretreatment rebleed risk. The rate of hemorrhage-free survival remained 86.4% and 75.1% (1 patient each) at 20 years after RS in the single- and multiple-bleed groups, respectively.Pretreatment hemorrhages resulted in permanent deficits in 48.8% of the cases with a single bleed and in 77.1% of the cases with multiple bleeds. Both the rate and severity of deficits were significantly lower in the first group. Only mild and a low rate of permanent neurological deficits were caused either by posttreatment hemorrhages (7.4%) or by radiation (7.2%). The rate of persistent morbidity in the single-bleed group remained significantly lower at the end of the study than pretreatment morbidity in the multiple-bleed group (OR 2.9, 95% CI 1.6-5.3). Lesion-specific mortality was < 1%. CONCLUSIONS The hemorrhage rate of CMs after RS remained low after the first 2 years during the longer follow-up period. The benefit of early treatment appears to be confirmed by the study results as repeated hemorrhages carry the risk of significantly higher cumulative morbidity than the morbidity associated with RS.
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Affiliation(s)
- Gábor Nagy
- 1National Institute of Clinical Neurosciences, Budapest, Hungary
| | - Wendy Burkitt
- 3National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital; and
| | | | - Debapriya Bhattacharyya
- 2Department of Neurosurgery, and
- 3National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital; and
- 4Thornbury Radiosurgery Centre, Sheffield, United Kingdom
| | - John Yianni
- 2Department of Neurosurgery, and
- 3National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital; and
- 4Thornbury Radiosurgery Centre, Sheffield, United Kingdom
| | - Jeremy G Rowe
- 2Department of Neurosurgery, and
- 3National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital; and
- 4Thornbury Radiosurgery Centre, Sheffield, United Kingdom
| | | | - Matthias W R Radatz
- 2Department of Neurosurgery, and
- 3National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital; and
- 4Thornbury Radiosurgery Centre, Sheffield, United Kingdom
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Georgieva VB, Krastev ED. Surgical Treatment of Brainstem Cavernous Malformation with Concomitant Developmental Venous Anomaly. Asian J Neurosurg 2019; 14:557-560. [PMID: 31143282 PMCID: PMC6516034 DOI: 10.4103/ajns.ajns_246_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Surgical resection of brainstem cavernous malformations (BCMs) is a high-risk procedure and can be challenging to the neurosurgeon. Lateral surgical routes are becoming increasingly used to approach ventrolaterally brainstem cavernoma. Surgical approach decision depends on the location of the cavernoma in the brainstem and a possible association with brainstem developmental venous anomalies (DVAs). DVA can affect the formation and clinical course of cavernous malformation (CM). CMs related to DVAs tend to have more aggressive behavior than isolated CM. In cases of DVAs associated with hemorrhage, CMs are most often the site of bleeding rather than DVAs themselves. In this case report, we present a 24-year-old woman with a pontomedullary CM and associated dorsally located DVA. BCM was operated through a far lateral suboccipital craniotomy. Brainstem entry point was at inferior olive with extension to the pontomedullary sulcus. This approach should be preferred as a safe surgical exposure to the central and paramedian pontomedullary cavernoma, especially in the cases with associated intraparenchymal brainstem DVA. Such surgical exposure allows preservation of the concomitant brainstem DVA.
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Affiliation(s)
| | - Emil Dimitrov Krastev
- Department of Neurosurgery, Sofiamed Hospital, Sofia University St. Kliment Ohridski, Sofia, Bulgaria
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Li D, Jiao YM, Wang L, Lin FX, Wu J, Tong XZ, Wang S, Cao Y. Surgical outcome of motor deficits and neurological status in brainstem cavernous malformations based on preoperative diffusion tensor imaging: a prospective randomized clinical trial. J Neurosurg 2019; 130:286-301. [PMID: 29547081 DOI: 10.3171/2017.8.jns17854] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/21/2017] [Indexed: 12/18/2022]
Abstract
OBJECTIVE: Surgical management of brainstem lesions is challenging due to the highly compact, eloquent anatomy of the brainstem. This study aimed to evaluate the safety and efficacy of preoperative diffusion tensor imaging (DTI) and diffusion tensor tractography (DTT) in brainstem cavernous malformations (CMs). METHODS: A prospective randomized controlled clinical trial was performed by using stratified blocked randomization. The primary eligibility criterion of the study was being a surgical candidate for brainstem CMs (with informed consent). The study enrolled 23 patients who underwent preoperative DTI/DTT and 24 patients who did not (the control group). The pre- and postoperative muscle strength of both limbs and modified Rankin Scale (mRS) scores were evaluated. Muscle strength of any limb at 12 months after surgery at the clinic visit was the primary outcome; worsened muscle strength was considered to be a poor outcome. Outcome assessors were blinded to patient management. This study reports the preliminary results of the interim analysis. RESULTS: The cohort included 47 patients (22 women) with a mean age of 35.7 years. The clinical baselines between these 2 groups were not significantly different. In the DTI/DTT group, the corticospinal tract was affected in 17 patients (73.9%): it was displaced, deformed/partially interrupted, or completely interrupted in 6, 7, and 4 patients, respectively. The surgical approach and brainstem entry point were adjusted in 3 patients (13.0%) based on DTI/DTT data. The surgical morbidity of the DTI/DTT group (7/23, 30.4%) was significantly lower than that of the control group (19/24, 79.2%, p = 0.001). At 12 months, the mean mRS score (1.1, p = 0.034) and percentage of patients with worsened motor deficits (4.3%, p = 0.006) were significantly lower in the DTI/DTT group than in the control group (1.7% and 37.5%). Multivariate logistic regression identified the absence of preoperative DTI/DTT (OR 0.06, 95% CI 0.01-0.73, p = 0.028) and use of the 2-point method (OR 4.15, 95% CI 1.38-12.49, p = 0.011) as independent adverse factors for a worsened motor deficit. The multivariate model found a significant correlation between poor mRS score and both an increased preoperative mRS score (t = 3.559, p = 0.001) and absence of preoperative DTI/DTT (t = -2.747, p = 0.009). CONCLUSIONS: DTI/DTT noninvasively allowed for visualization of the anatomical relationship between vital tracts and pathologies as well as facilitated the brainstem surgical approach and entry-point decision making. The technique was valuable for complex neurosurgical planning to reduce morbidity. Nonetheless, DTI/DTT data should be interpreted cautiously.■ CLASSIFICATION OF EVIDENCE Type of question: therapeutic; study design: randomized controlled trial; evidence: class I. Clinical trial registration no.: NCT01758211 (ClinicalTrials.gov).
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Rajagopal N, Kawase T, Mohammad AA, Seng LB, Yamada Y, Kato Y. Timing of Surgery and Surgical Strategies in Symptomatic Brainstem Cavernomas: Review of the Literature. Asian J Neurosurg 2019; 14:15-27. [PMID: 30937003 PMCID: PMC6417313 DOI: 10.4103/ajns.ajns_158_18] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Brainstem cavernomas (BSCs) are angiographically occult, benign low flow vascular malformations that pose a significant surgical challenge due to their eloquent location. The present study includes an extensive review of the literature and three illustrative cases of BSC with emphasis on the timing of surgery: surgical approaches, usage of intraoperative monitoring, and complication avoidance. A systematic search was performed using the PubMed database was from January 1, 1999, to June 2018. The relevant articles were reviewed with particular attention to hemorrhage rates, timing of surgery, indications for surgery, surgical approaches, and outcome. Along with this, a retrospective analysis of three cases of symptomatic BSC, who were operated for the same, during the year 2018 in our institute was conducted. All the three patients presented with at least 1 episode of hemorrhage before surgery. Of these, one patient was operated immediately due to altered sensorium whereas the other two were operated after at least 4 weeks of the hemorrhagic episode. The patients who were operated in the subacute phase of bleed were seen to have liquefaction of hematoma, thus providing a good surgical demarcation and thereby reduced surgery-related trauma to the surrounding eloquent structures. Two patients improved neurologically during the immediate postoperative period, whereas one had transient worsening of neurological deficits during the immediate postoperative period in the form of additional cranial nerve palsies which completely improved on follow-up after 2 months. Radical resection is recommended in all patients with symptomatic BSCs. Surgery should be considered after the first or the second episode of hemorrhage as multiple rebleeds can cause exacerbation of deficits and sometimes mortality as well. Considering surgical timing, anywhere between 4 and 6 weeks or the subacute phase of the hemorrhage is considered appropriate. The aims of surgical intervention must be to improve preoperative function, minimize surgical morbidity and to reduce hemorrhagic rates. In spite of the significant surgical morbidity associated with BSCs, appropriate patient selection, meticulous surgical planning with adjuncts such as intraoperative monitoring and neuronavigation will go a long way in avoidance of major postoperative complications.
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Affiliation(s)
- Niranjana Rajagopal
- Department of Neurosurgery, Sathya Sai Institute of Higher Medical Science, Bengaluru, Karnataka, India
| | - Tsukasa Kawase
- Department of Neurosurgery, Fujita Health University, Banbuntane Hotokukai Hospital, Nagoya, Japan
| | | | - Liew Boon Seng
- Department of Neurosurgery, Sungai Buloh Hospital, Selangor, Malaysia
| | - Yasuhiro Yamada
- Department of Neurosurgery, Fujita Health University, Banbuntane Hotokukai Hospital, Nagoya, Japan
| | - Yoko Kato
- Department of Neurosurgery, Fujita Health University, Banbuntane Hotokukai Hospital, Nagoya, Japan
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Pichi F, Abboud EB, Sarraf D. Is the Association of Retinal Venous Malformations With Venous Malformations of the Brain Clinically Meaningful?-Reply. JAMA Ophthalmol 2018; 136:1425. [PMID: 30242351 DOI: 10.1001/jamaophthalmol.2018.4059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Francesco Pichi
- Cleveland Clinic Abu Dhabi, Eye Institute, Abu Dhabi, United Arab Emirates.,Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Emad B Abboud
- Cleveland Clinic Abu Dhabi, Eye Institute, Abu Dhabi, United Arab Emirates
| | - David Sarraf
- Stein Eye Institute, University of California, Los Angeles.,Greater Los Angeles VA Healthcare Center, Los Angeles, California
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Thompson K, Mattern-Baxter K. Intensive, functional training leads to optimal outcomes in a young woman post brain stem hemorrhage due to cerebral cavernous malformation. Physiother Theory Pract 2018; 36:741-752. [PMID: 29979899 DOI: 10.1080/09593985.2018.1493166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
PURPOSE Cerebral cavernous malformations (CCMs) can cause intracranial hemorrhages and account for 5-15% of all cerebral vascular malformations. The purpose of this retrospective case report is to describe the unusual motor recovery of a young woman following a large hemorrhage of a previously unknown brainstem CCM, otherwise not reported in the literature. Case Description: The patient was a 29-year-old female who presented with severe hemiparesis on the left 6 weeks after a first-ever hemorrhage. She had demonstrated minimal improvement in her motor recovery to date, was dependent on a walker for ambulation, and had no distal left upper extremity function. An intensive evidence-based plan of care over 6 weeks included progressive task-specific strengthening, treadmill training, and dynamic balance training. Outcomes: The patient achieved complete motor recovery, indicated by improvement from 23/66 to 64/66 in the Fugl-Meyer Upper Extremity Subscale score and from 12/30 to 30/30 in the Functional Gait Assessment. She returned to independent ambulation with functional gait speeds and kinematics. Discussion: This case report demonstrates an unusual clinical course of unexpected full recovery in a young woman after a large brainstem CCM after an intensive 6-week course of physical therapy. Other patients with a similar presentation after CCM may benefit from an intensive plan of care. Clinicians should be aware of the possibility of unusual recovery in this population as not to limit expectations for recovery.
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Affiliation(s)
- Kasey Thompson
- Dignity Health, Mercy San Juan Medical Center ,Carmichael, CA
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30
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Park K, Kim JW, Chung HT, Paek SH, Kim DG. Long-Term Outcome of Gamma Knife Radiosurgery for Symptomatic Brainstem Cavernous Malformation. World Neurosurg 2018; 116:e1054-e1059. [PMID: 29864574 DOI: 10.1016/j.wneu.2018.05.164] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/21/2018] [Accepted: 05/23/2018] [Indexed: 10/14/2022]
Abstract
OBJECTIVE We sought to analyze the long-term outcome of Gamma Knife radiosurgery (GKS) for symptomatic brainstem cavernous malformation (s-BSCM). METHODS Forty-five patients (14 males, 31 females) were treated with GKS for s-BSCM from January 1998 to December 2011. All patients were followed up for >5 years, and their clinical data were analyzed retrospectively. All patients had a history of symptomatic bleeding once or more before GKS. These hemorrhages caused neurologic deficits including cranial nerve deficits, hemiparesis, hemisensory deficits, spasticity, or chorea. The mean target volume of s-BSCM was 1.82 cm3, and the median prescribed marginal dose of radiation was 13 Gy. The mean clinical and imaging follow-up period was 9.31 years (range 5.1-19.4 years). RESULTS The 45 patients had 69 hemorrhagic events before GKS. During the follow-up period after GKS, 35 patients had no hemorrhagic event, 6 patients had 1 episode of symptomatic hemorrhage, and 4 patients had 2 episodes. The calculated annual hemorrhage rate was 40.06% at pre-GKS, 3.3% at 2 years after GKS, 1.48% at 5 years after GKS, and 4.64% at >5 years after GKS. In this study of 45 patients, symptomatic radiation-induced complications developed in only 1 patient (2.2%). No patients had died at the last follow-up. CONCLUSIONS GKS for s-BSCM is a safe and effective alternative to surgical resection for reducing the rate of recurrent hemorrhage. Because the annual hemorrhage rate increases >5 years after GKS, clinicians should monitor patients closely to determine their subsequent treatment.
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Affiliation(s)
- Kawngwoo Park
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jin Wook Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea.
| | - Hyun-Tai Chung
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea
| | - Sun Ha Paek
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea
| | - Dong Gyu Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Republic of Korea
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31
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Zhang S, Wang Y, Liu W, Hui X, You C. Letter to the Editor Regarding “Symptomatic Brainstem Cavernoma of Elderly Patients: Timing and Strategy of Surgical Treatment: Two Case Reports and Review of the Literature”. World Neurosurg 2018; 113:386. [DOI: 10.1016/j.wneu.2018.01.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 01/14/2018] [Accepted: 01/15/2018] [Indexed: 11/30/2022]
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Zaidi HA, Mooney MA, Levitt MR, Dru AB, Abla AA, Spetzler RF. Impact of Timing of Intervention Among 397 Consecutively Treated Brainstem Cavernous Malformations. Neurosurgery 2018; 81:620-626. [PMID: 28184444 DOI: 10.1093/neuros/nyw139] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 12/15/2016] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Surgical resection of brainstem cavernous malformations (BSCMs) is challenging, and patient selection and timing of intervention remain controversial. OBJECTIVE To evaluate the impact of surgical timing and predictors of neurological outcome after surgical resection of BSCMs. METHODS Consecutive adult patients (≥18 years) with BSCMs undergoing surgical resection between 1985 and 2014 by the senior author (RFS) were retrospectively reviewed. Patient demographics, lesion characteristics, imaging results, surgical approach, and perioperative and long-term neurological morbidity were analyzed. RESULTS Data were analyzed for a total of 397 adult patients (160, 40% male). On univariate analysis, a greater proportion of patients treated within 6 weeks of hemorrhage had an improved Glasgow Outcome Scale score (P = .06). On logistic regression analysis, patients treated within 6 weeks of hemorrhage experienced improved clinical outcomes (odds ratio = 1.73; 95% confidence interval = 1.06-2.83; P = .03). CONCLUSIONS Although BSCM surgery is associated with significant perioperative morbidity and mortality, favorable long-term hemorrhage rates and symptom resolution can be achieved in a carefully selected group of patients. Overall, patients treated acutely, within 6 weeks, benefited the most from surgical intervention.
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Affiliation(s)
- Hasan A Zaidi
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - Michael A Mooney
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - Michael R Levitt
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - Alexander B Dru
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - Adib A Abla
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - Robert F Spetzler
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
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Tumturk A, Li Y, Turan Y, Cikla U, Iskandar BJ, Baskaya MK. Emergency resection of brainstem cavernous malformations. J Neurosurg 2017; 128:1289-1296. [PMID: 28686112 DOI: 10.3171/2017.1.jns161693] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Brainstem cavernous malformations (CMs) pose significant challenges to neurosurgeons because of their deep locations and high surgical risks. Most patients with brainstem CMs present with sudden-onset cranial nerve deficits or ataxia, but uncommonly patients can present in extremis from an acute hemorrhage, requiring surgical intervention. However, the timing of surgery for brainstem CMs has been a controversial topic. Although many authors propose delaying surgery into the subacute phase, some patients may not tolerate waiting until surgery. To the best of the authors' knowledge, emergency surgery after a brainstem CM hemorrhage has not been described. In cases of rapidly progressive neurological deterioration, emergency resection may often be the only option. In this retrospectively reviewed small series of patients, the authors report favorable outcomes after emergency surgery for resection of brainstem CMs.
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Hayashi M, Kakinohana M. Obstetric Anesthesia for a Pregnant Woman With Brainstem Cavernous Malformations. ACTA ACUST UNITED AC 2017; 9:54-56. [DOI: 10.1213/xaa.0000000000000525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Delaunois J, Vaz G, Raftopoulos C. Transsylvian Transuncal Approach for an Anterior Midbrain Cavernous Malformation Resection: A Case Report. Oper Neurosurg (Hagerstown) 2017; 14:E38-E43. [DOI: 10.1093/ons/opx116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 05/02/2017] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND AND IMPORTANCE
Cavernous malformations (CMs) are vascular abnormalities with a hemorrhage risk of 0.2% to 5% per year, according to their location. Brainstem CMs seem to have a greater hemorrhagic risk and represent a neurosurgical challenge. We report here the first transsylvian transuncal (TS-TU) approach for an anteromedial mesencephalic CM resection.
CLINICAL PRESENTATION
A 29-yr-old female suddenly presented a left hemiparesis and central facial paresis with a diplopia in the upward gaze. A cerebral imagery revealed an 18-mm right cerebral peduncle CM with signs of acute hemorrhage. Two months later, she rebleed while pregnant. The pregnancy was interrupted. Five months later, a 3.0 Tesla magnetic resonance imaging (MRI) with diffusion tensor imaging sequences was realized for preoperative planning followed by a gross total resection of the CM through a TS-TU approach to avoid the perforating arteries of the anterior perforated substance. The patient presented postoperatively again a left hemiparesis and central facial paresis with a right oculomotor nerve paresis. On the tenth postsurgical day, she developed a Holmes’ tremor of the left upper limb, for which a Levodopa treatment was initiated. Three months postoperative, MRI showed a gross total resection of the mesencephalic CM without complications. A complete clinical recovery was observed 1 yr later.
CONCLUSION
We describe here the first performance of a TS-TU approach for an anterior mesencephalic CM resection. This surgical approach allowed direct access to the CM, avoiding the vascularization of the anterior perforated substance.
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Affiliation(s)
- Julien Delaunois
- Department of Neurosurgery, Cliniques Universitaires Saint-Luc, Université Cath-olique de Louvain, Brussels, Belgium
| | - Géraldo Vaz
- Department of Neurosurgery, Cliniques Universitaires Saint-Luc, Université Cath-olique de Louvain, Brussels, Belgium
| | - Christian Raftopoulos
- Department of Neurosurgery, Cliniques Universitaires Saint-Luc, Université Cath-olique de Louvain, Brussels, Belgium
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Flemming KD, Lanzino G. Management of Unruptured Intracranial Aneurysms and Cerebrovascular Malformations. Continuum (Minneap Minn) 2017; 23:181-210. [PMID: 28157750 DOI: 10.1212/con.0000000000000418] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE OF REVIEW Unruptured intracranial aneurysms and vascular malformations are detected more frequently because of the increased use and availability of brain imaging. Management of these entities requires knowledge of which patients are at high risk for hemorrhage and what treatment options are available. This article summarizes the epidemiology, natural history, and management strategies for unruptured intracranial aneurysms, arteriovenous malformations, cavernous malformations, developmental venous anomalies, and capillary telangiectasias. RECENT FINDINGS Pooled cohort studies and meta-analyses have improved the ability to predict hemorrhage for each vascular abnormality. Scores and tools have been developed to aid the practitioner in predicting hemorrhage risk for unruptured intracranial aneurysms. Advances in endovascular techniques for unruptured intracranial aneurysms have improved the ability to treat difficult wide-necked aneurysms. SUMMARY Unruptured intracranial aneurysms are a common incidental finding. The PHASES (population, hypertension, age, size of aneurysm, earlier subarachnoid hemorrhage from another aneurysm, site of aneurysm) score and Unruptured Intracranial Aneurysm Treatment Score may be useful tools for predicting natural history and treatment recommendations. The overall risk of hemorrhage for both arteriovenous malformations and cavernous malformations is about 2% to 4% per year. With both of these entities, prior hemorrhage predicts future hemorrhage. In addition, other select patient and radiologic factors influence risk of hemorrhage. The risk of future hemorrhage should be compared to the risk of treatment. Developmental venous anomalies and capillary telangiectasias are largely benign entities and rarely symptomatic.
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Akers A, Al-Shahi Salman R, A. Awad I, Dahlem K, Flemming K, Hart B, Kim H, Jusue-Torres I, Kondziolka D, Lee C, Morrison L, Rigamonti D, Rebeiz T, Tournier-Lasserve E, Waggoner D, Whitehead K. Synopsis of Guidelines for the Clinical Management of Cerebral Cavernous Malformations: Consensus Recommendations Based on Systematic Literature Review by the Angioma Alliance Scientific Advisory Board Clinical Experts Panel. Neurosurgery 2017; 80:665-680. [PMID: 28387823 PMCID: PMC5808153 DOI: 10.1093/neuros/nyx091] [Citation(s) in RCA: 287] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 02/09/2017] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Despite many publications about cerebral cavernous malformations (CCMs), controversy remains regarding diagnostic and management strategies. OBJECTIVE To develop guidelines for CCM management. METHODS The Angioma Alliance ( www.angioma.org ), the patient support group in the United States advocating on behalf of patients and research in CCM, convened a multidisciplinary writing group comprising expert CCM clinicians to help summarize the existing literature related to the clinical care of CCM, focusing on 5 topics: (1) epidemiology and natural history, (2) genetic testing and counseling, (3) diagnostic criteria and radiology standards, (4) neurosurgical considerations, and (5) neurological considerations. The group reviewed literature, rated evidence, developed recommendations, and established consensus, controversies, and knowledge gaps according to a prespecified protocol. RESULTS Of 1270 publications published between January 1, 1983 and September 31, 2014, we selected 98 based on methodological criteria, and identified 38 additional recent or relevant publications. Topic authors used these publications to summarize current knowledge and arrive at 23 consensus management recommendations, which we rated by class (size of effect) and level (estimate of certainty) according to the American Heart Association/American Stroke Association criteria. No recommendation was level A (because of the absence of randomized controlled trials), 11 (48%) were level B, and 12 (52%) were level C. Recommendations were class I in 8 (35%), class II in 10 (43%), and class III in 5 (22%). CONCLUSION Current evidence supports recommendations for the management of CCM, but their generally low levels and classes mandate further research to better inform clinical practice and update these recommendations. The complete recommendations document, including the criteria for selecting reference citations, a more detailed justification of the respective recommendations, and a summary of controversies and knowledge gaps, was similarly peer reviewed and is available on line www.angioma.org/CCMGuidelines .
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Affiliation(s)
| | | | - Issam A. Awad
- Neurovascular Surgery Program, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | | | - Kelly Flemming
- Department of Neurology, Mayo Clinic, Rochester, Minnesota
| | - Blaine Hart
- Department of Radiology, University of New Mexico, Albuquerque, New Mexico
| | - Helen Kim
- Department of Anesthesia and Perioperative Care, Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California
| | | | - Douglas Kondziolka
- Departments of Neurosurgery and Radiation Oncology, NYU Langone Medical Center, New York City, New York
| | | | - Leslie Morrison
- Departments of Neurology and Pediatrics, University of New Mexico, Albuquerque, New Mexico
| | - Daniele Rigamonti
- Department of Neurosurgery, Johns Hopkins Medicine, Baltimore, Maryland
| | - Tania Rebeiz
- Neurovascular Surgery Program, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | | | - Darrel Waggoner
- Department of Human Genetics and Pediatrics, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Kevin Whitehead
- Department of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah
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Gross BA, Du R. Hemorrhage from cerebral cavernous malformations: a systematic pooled analysis. J Neurosurg 2017; 126:1079-1087. [DOI: 10.3171/2016.3.jns152419] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE
The aim of this paper is to define an overall cavernous malformation (CM) hemorrhage rate and risk factors for hemorrhage.
METHODS
The authors performed a systematic, pooled analysis via the PubMed database through October 2015 using the terms “cavernoma,” “cavernous malformation,” “natural history,” “bleeding,” and “hemorrhage.” English-language studies providing annual rates and/or risk factors for CM hemorrhage were included. Data extraction, performed independently by the authors, included demographic data, hemorrhage rates, and hemorrhage risk factors.
RESULTS
Across 12 natural history studies with 1610 patients, the mean age at presentation was 42.7 years old and 52% of patients (95% CI 49%–55%) were female. Presentation modality was seizure in 30% (95% CI 25%–35%), hemorrhage in 26% (95% CI 17%–37%), incidental in 17% (95% CI 9%–31%), and focal deficits only in 16% of cases (95% CI 11%–23%). CM location was lobar in 66% (95% CI 61%–70%), brainstem in 18% (95% CI 13%–24%), deep supratentorial in 8% (95% CI 6%–10%), and cerebellar in 8% (95% CI 5%–11%). Pooling 7 studies that did not assume CM presence since birth, the annual hemorrhage rate was 2.5% per patient-year over 5081.2 patient-years of follow-up (95% CI 1.3%–5.1%). Pooling hazard ratios across 5 studies that evaluated hemorrhage risk factors, prior CM hemorrhage was a significant risk factor for hemorrhage (HR 3.73, 95% CI 1.26–11.1; p = 0.02) while younger age, female sex, deep location, size, multiplicity, and associated developmental venous anomalies (DVAs) were not.
CONCLUSIONS
Although limited by the heterogeneity of incorporated reports and selection bias, this study found prior hemorrhage to be a significant risk factor for CM bleeding, while age, sex, CM location, size, multiplicity, and associated DVAs were not. Future natural history studies should compound annual hemorrhage rate with prospective seizure and nonhemorrhagic neurological deficit rates.
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Affiliation(s)
- Bradley A. Gross
- 1Division of Neurological Surgery, Barrow Neurological Institute, Phoenix, Arizona; and
| | - Rose Du
- 2Department of Neurological Surgery, Brigham and Women's Hospital, Boston, Massachusetts
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Arauz A, Patiño-Rodriguez HM, Chavarria-Medina M, Becerril M, Longo GM, Nathal E. Rebleeding and Outcome in Patients with Symptomatic Brain Stem Cavernomas. Cerebrovasc Dis 2017; 43:283-289. [DOI: 10.1159/000463392] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 02/08/2017] [Indexed: 11/19/2022] Open
Abstract
Purpose: We sought to evaluate the long-term functional outcomes and identify the potential risk factors for rebleeding in patients with brain stem cavernous malformations (BCMs) who presented with hemorrhages and were surgically or conservatively treated and prospectively monitored. Methods: From January 1990 to July 2015, we included patients with first hemorrhagic episodes secondary to single BCMs. Modified Rankin score (mRS) was used for neurological status assessment. Univariate and multivariate regression statistics were used to identify the risk factors for rebleeding. Results: A total of 99 patients with BCMs hemorrhages were included (59 [59.6%] women, mean age 37± 13 years). As initial treatments, 37 patients (37.4%) underwent surgery and 62 (62.6%) received conservative treatment. The median follow-up was 3.33 years (interquartile range 1.16-7 years; 408.3 patient/years). The rebleeding rate by patient/year was 10% in conservatively treated patients. Deterioration was significantly more frequent in patients with rebleeding (p = 0.0001). At the end of the follow-up, the mRS were favorable in 49 patients (65.3%) without rebleeding, whereas only 8 (33.3%) with rebleeding evolved to favorable outcomes (p = 0.006). Lesion size >18 mm (hazards ratio, HR 3.34, 95% CI 1.54-7.26; p = 0.0001) and ventral location or crossing the brain stem's midpoint (HR 2.5, 95% CI 1.14-5.46; p = 0.022) were associated with a major risk of rebleeding in the univariate analysis, but only a lesion >18 mm remained statistically significant (HR 2.7, 95% CI 1.2-6.21; p = 0.016) in the multivariate analysis. Conclusion: A lesion size >18 mm was the principal factor associated with hemorrhage recurrence. The overall functional outcome was good. However, significant morbidity was attributable to rebleeding.
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Noshiro S, Mikami T, Kataoka-Sasaki Y, Sasaki M, Ohnishi H, Ohtaki S, Wanibuchi M, Mikuni N, Kocsis JD, Honmou O. Co-expression of tissue factor and IL-6 in immature endothelial cells of cerebral cavernous malformations. J Clin Neurosci 2017; 37:83-90. [PMID: 28087183 DOI: 10.1016/j.jocn.2016.12.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/27/2016] [Indexed: 12/30/2022]
Abstract
Cerebral cavernous malformations (CCMs) are congenital abnormal clusters of capillaries that are prone to leaking and thought to result from a disorder of endothelial cells. The underlying pathology of CCM is not fully understood. We analyzed the expression of tissue factor (TF) and interleukin-6 (IL-6) in CCMs to determine the association of TF and IL-6 with clinical and pathological findings. Thirteen cases of operative specimens of sporadic CCMs were included in this study. The expression of messenger RNA of TF and IL-6 was assayed and the association with clinical factors was investigated. Then, the distribution of TF and IL-6 was examined with immunofluorescence. The mRNA expression of TF of CCMs was significantly higher than that of the control (p=0.017), and was correlated with the number of hemorrhage appearances (p=0.190, ρ=0.62). The mRNA expression level of IL-6 was significantly correlated with the mRNA expression level of TF (p=0.034, ρ=0.58). Examination of immunostained sections indicated that TF+ cells were also positive for IL-6, and distributed around normal endothelial cells. Moreover, the TF+/IL-6+ cells expressed CD31 and VEGFR2. The expressions of IL-6 and TF were correlated, and both were present in the same immature endothelial cells. TF is elevated in CCM and might mediate progressive events. These factors may play a prognostic role in CCM.
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Affiliation(s)
- Shouhei Noshiro
- Department of Neurosurgery, Sapporo Medical University, School of Medicine, Japan; Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan
| | - Takeshi Mikami
- Department of Neurosurgery, Sapporo Medical University, School of Medicine, Japan; Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan.
| | - Yuko Kataoka-Sasaki
- Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan
| | - Masanori Sasaki
- Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan; Department of Neurology, Yale University, School of Medicine, New Haven, CT 06510, USA; Center for Neuroscience and Regeneration Research, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Hirofumi Ohnishi
- Department of Public Health, Sapporo Medical University, School of Medicine, Japan
| | - Shunya Ohtaki
- Department of Neurosurgery, Sapporo Medical University, School of Medicine, Japan; Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan
| | - Masahiko Wanibuchi
- Department of Neurosurgery, Sapporo Medical University, School of Medicine, Japan; Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan
| | - Nobuhiro Mikuni
- Department of Neurosurgery, Sapporo Medical University, School of Medicine, Japan
| | - Jeffery D Kocsis
- Department of Neurology, Yale University, School of Medicine, New Haven, CT 06510, USA; Center for Neuroscience and Regeneration Research, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Osamu Honmou
- Department of Neural Regenerative Medicine, Research Institute for Frontier Medicine, Sapporo Medical University, School of Medicine, Japan; Department of Neurology, Yale University, School of Medicine, New Haven, CT 06510, USA; Center for Neuroscience and Regeneration Research, VA Connecticut Healthcare System, West Haven, CT 06516, USA
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Abstract
Cavernous malformations, accounting for approximately 5-15% of all vascular abnormalities in the central nervous system, are angiographically occult lesions which most often present with seizures, rather than acute hemorrhage. Widely variable across populations, the incidence of cavernous malformations has been reported to be 0.15-0.56 per 100 000 persons per year, with an annual hemorrhage rate of 0.6-11% per patient-year. Seen in 0.17-0.9% of the population, up to one-half are familial, and at least three gene loci have been associated with a familial form, more common among Hispanic Americans. Most cavernous malformations are supratentorial, with 10-23% in the posterior fossa, and approximately 5% found in the spine.
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Affiliation(s)
- Hannah E Goldstein
- Department of Neurosurgery, The Neurological Institute, Columbia University Medical Center, New York, NY, USA
| | - Robert A Solomon
- Department of Neurosurgery, The Neurological Institute, Columbia University Medical Center, New York, NY, USA.
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Case 39. Neuroophthalmology 2017. [DOI: 10.1007/978-1-4471-2410-8_39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Tian KB, Zheng JJ, Ma JP, Hao SY, Wang L, Zhang LW, Wu Z, Zhang JT, Li D. Clinical course of untreated thalamic cavernous malformations: hemorrhage risk and neurological outcomes. J Neurosurg 2016; 127:480-491. [PMID: 27834594 DOI: 10.3171/2016.8.jns16934] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The natural history of cerebral cavernous malformations (CMs) has been widely studied, but the clinical course of untreated thalamic CMs is largely unknown. Hemorrhage of these lesions can be devastating. The authors undertook this study to obtain a prospective hemorrhage rate and provide a better understanding of the prognosis of untreated thalamic CMs. METHODS This longitudinal cohort study included patients with thalamic CMs who were diagnosed between 2000 and 2015. Clinical data were recorded, radiological studies were extensively reviewed, and follow-up evaluations were performed. RESULTS A total of 121 patients were included in the study (56.2% female), with a mean follow-up duration of 3.6 years. The overall annual hemorrhage rate (subsequent to the initial presentation) was calculated to be 9.7% based on the occurrence of 42 hemorrhages over 433.1 patient-years. This rate was highest in patients (n = 87) who initially presented with hemorrhage and focal neurological deficits (FNDs) (14.1%) (χ2 = 15.358, p < 0.001), followed by patients (n = 19) with hemorrhage but without FND (4.5%) and patients (n = 15) without hemorrhage regardless of symptoms (1.2%). The initial patient presentations of hemorrhage with FND (hazard ratio [HR] 2.767, 95% CI 1.336-5.731, p = 0.006) and associated developmental venous anomaly (DVA) (HR 2.510, 95% CI 1.275-4.942, p = 0.008) were identified as independent hemorrhage risk factors. The annual hemorrhage rate was significantly higher in patients with hemorrhagic pres entation at diagnosis (11.7%, p = 0.004) or DVA (15.7%, p = 0.002). Compared with the modified Rankin Scale (mRS) score at diagnosis (mean 2.2), the final mRS score (mean 2.0) was improved in 37 patients (30.6%), stable in 59 patients (48.8%), and worse in 25 patients (20.7%). Lesion size (odds ratio [OR] per 0.1 cm increase 3.410, 95% CI 1.272-9.146, p = 0.015) and mRS score at diagnosis (OR per 1 point increase 3.548, 95% CI 1.815-6.937, p < 0.001) were independent adverse risk factors for poor neurological outcome (mRS score ≥ 2). Patients experiencing hemorrhage after the initial ictus (OR per 1 ictus increase 6.923, 95% CI 3.023-15.855, p < 0.001) had a greater chance of worsened neurological status. CONCLUSIONS This study verified the adverse predictors for hemorrhage and functional outcomes of thalamic CMs and demonstrated an overall annual symptomatic hemorrhage rate of 9.7% after the initial presentation. These findings and the mode of initial presentation are useful for clinicians and patients when selecting an appropriate treatment, although the tertiary referral bias of the series should be taken into account.
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Affiliation(s)
- Kai-Bing Tian
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Jing-Jie Zheng
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Jun-Peng Ma
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Shu-Yu Hao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Liang Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Li-Wei Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Zhen Wu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Jun-Ting Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
| | - Da Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University.,Beijing Key Laboratory of Brian Tumor, Beijing; and
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Liu HB, Wang Y, Yang S, Gong FL, Xu YY, Wang W. Gamma knife radiosurgery for brainstem cavernous malformations. Clin Neurol Neurosurg 2016; 151:55-60. [PMID: 27794267 DOI: 10.1016/j.clineuro.2016.09.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 09/19/2016] [Accepted: 09/24/2016] [Indexed: 02/05/2023]
Abstract
OBJECTIVE The goal of this retrospective study was to evaluate the efficacy and safety of gamma knife radiosurgery (GKS) for the treatment of brainstem cavernous malformations (CMs). METHODS Between January of 2009 and December of 2014, 43 patients (20 males and 23 females) with brainstem CMs were treated at the West China Hospital, Sichuan University, Gamma Knife Center. The mean age of these patients was 41.7 years. All of the patients experienced 1 or more episodes of symptomatic bleeding (range 1-4) before undergoing GKS. The mean volume of the malformations at the time of GKS was 442.1mm3, and the mean prescribed marginal radiation dose was 11.9Gy. The mean follow-up period after radiosurgery was 36 months (range 12-120 months). RESULTS Before GKS, 50 hemorrhages (1.2 per patient) were observed (25.0% annual hemorrhage rate). Three hemorrhages following GKS were observed within the first 2 years (3.92% annual hemorrhage rate), and 1 hemorrhage was observed in the period after the first 2 years (1.85% annual hemorrhage rate). In this study of 43 patients, new neurological deficits developed in only 1 patient (2.32%; permanent paresthesia on the left side of the face and the right lower limb of the patient). There were no deaths in this study. CONCLUSION GKS is a favorable alternative treatment for brainstem CMs. Using a low marginal dose treatment might reduce the rate of hemorrhage and radiation-induced complications.
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Affiliation(s)
- Hong Bin Liu
- Department of Neurosurgery, West China Hospital, Sichuan University, China
| | - Yi Wang
- Department of Neurosurgery, West China Hospital, Sichuan University, China
| | - Sen Yang
- Department of Neurosurgery, West China Hospital, Sichuan University, China
| | - Fei Long Gong
- Department of Neurosurgery, West China Hospital, Sichuan University, China
| | - Yang Yang Xu
- Department of Neurosurgery, West China Hospital, Sichuan University, China
| | - Wei Wang
- Department of Neurosurgery, West China Hospital, Sichuan University, China.
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Abstract
BACKGROUND AND PURPOSE To summarize our experience in surgery approach to brainstem cavernous malformation (BSCM). METHODS A review of 23 consecutive patients with BSCM receiving surgical resection in our center between July of 2003 and June of 2014 was performed. RESULTS Suboccipital approach, retrosigmoid approach, infratentorial-supracerebellar approach, Poppen approach, pterional approach, Kawase approach, and interhemispheric transcallosal-third ventrical approach were applied, of which the last 2 approaches being firstly reported in BSCM surgery. Gross total resection was achieved in 22 patients, whereas subtotal resection in 1. Neurologic function was improved in 15 patients, unchanged in 7 patients, and deteriorated in 1 patient. During a mean follow-up of 3.5 years, no recurrence occurred. CONCLUSIONS Proper surgery approach is important to assure total resection, protect normal vital structures, and avoid recurrence.
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Dammann P, Jabbarli R, Wittek P, Oppong MD, Kneist A, Zhu Y, Wrede K, Müller O, Forsting M, Sure U. Solitary Sporadic Cerebral Cavernous Malformations: Risk Factors of First or Recurrent Symptomatic Hemorrhage and Associated Functional Impairment. World Neurosurg 2016; 91:73-80. [DOI: 10.1016/j.wneu.2016.03.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 03/17/2016] [Accepted: 03/18/2016] [Indexed: 10/22/2022]
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Endoscopic Endonasal Approach to Mesencephalic Cavernous Malformations. World Neurosurg 2016; 90:701.e7-701.e10. [DOI: 10.1016/j.wneu.2016.02.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 02/10/2016] [Accepted: 02/12/2016] [Indexed: 11/22/2022]
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Taslimi S, Modabbernia A, Amin-Hanjani S, Barker FG, Macdonald RL. Natural history of cavernous malformation: Systematic review and meta-analysis of 25 studies. Neurology 2016; 86:1984-91. [PMID: 27164680 DOI: 10.1212/wnl.0000000000002701] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 02/21/2016] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE We pooled the results of studies on natural history of cavernous malformations (CM) to calculate point estimates and investigate main sources of heterogeneity. METHODS We searched MEDLINE, EMBASE, and ISI Web of Science for relevant studies published before May 2015. We used fixed or random effects models and meta-regression to pool the data. RESULTS Twenty-five studies were entered into the meta-analysis (90-1,295 patients depending on the analysis). Bleeding was defined as symptomatic hemorrhage plus radiologic evidence of hemorrhage. Sources of heterogeneity were identified as mixture of hemorrhage and rehemorrhage, mixture of rehemorrhage before and after 2 years of first bleeding, brainstem vs other locations, and calculation method. The rehemorrhage rate was higher than the hemorrhage rate (incidence rate ratio 16.5, p < 0.001, 95% confidence interval [CI] 9.7-28.0). Rehemorrhage within 2 years of the first hemorrhage was higher than after that (incidence rate ratio 1.8, p = 0.042, 95% CI 1.5-2.0). In two metaregression models, rough estimate of the annual incidence rate of hemorrhage was 0.3% (95% CI 0.1%-0.5%) and 2.8% (2.5%-3.3%) per person year in nonbrainstem and brainstem lesions and rough estimate of annual rehemorrhage rate per person year was 6.3% (3%-13.2%) and 32.3% (19.8%-52.7%) in nonbrainstem and brainstem lesions. Median time to rehemorrhage was 10.5 months. Posthemorrhage full recovery was 38.8%/person-year (28.7%-48.8%). Posthemorrhage full recovery or minimal disability was 79.5%/person-year (74.3%-84.8%). Mortality after bleeding was 2.2%. CONCLUSIONS The incidence of symptomatic hemorrhage or rehemorrhage is higher in brainstem lesions. First symptomatic hemorrhage increases the chance of symptomatic rehemorrhage, which decreases after 2 years.
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Affiliation(s)
- Shervin Taslimi
- From the Division of Neurosurgery (S.T.), University of Toronto, Canada; Department of Psychiatry (A.M.), Icahn School of Medicine, Mount Sinai Hospital, New York, NY; Department of Neurosurgery (S.A.-H.), University of Illinois at Chicago; Neurosurgical Service (F.G.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Division of Neurosurgery (R.L.M.), St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre for Biomedical Science; and the Department of Surgery (R.L.M.), Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Canada
| | - Amirhossein Modabbernia
- From the Division of Neurosurgery (S.T.), University of Toronto, Canada; Department of Psychiatry (A.M.), Icahn School of Medicine, Mount Sinai Hospital, New York, NY; Department of Neurosurgery (S.A.-H.), University of Illinois at Chicago; Neurosurgical Service (F.G.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Division of Neurosurgery (R.L.M.), St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre for Biomedical Science; and the Department of Surgery (R.L.M.), Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Canada
| | - Sepideh Amin-Hanjani
- From the Division of Neurosurgery (S.T.), University of Toronto, Canada; Department of Psychiatry (A.M.), Icahn School of Medicine, Mount Sinai Hospital, New York, NY; Department of Neurosurgery (S.A.-H.), University of Illinois at Chicago; Neurosurgical Service (F.G.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Division of Neurosurgery (R.L.M.), St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre for Biomedical Science; and the Department of Surgery (R.L.M.), Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Canada
| | - Fred G Barker
- From the Division of Neurosurgery (S.T.), University of Toronto, Canada; Department of Psychiatry (A.M.), Icahn School of Medicine, Mount Sinai Hospital, New York, NY; Department of Neurosurgery (S.A.-H.), University of Illinois at Chicago; Neurosurgical Service (F.G.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Division of Neurosurgery (R.L.M.), St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre for Biomedical Science; and the Department of Surgery (R.L.M.), Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Canada
| | - R Loch Macdonald
- From the Division of Neurosurgery (S.T.), University of Toronto, Canada; Department of Psychiatry (A.M.), Icahn School of Medicine, Mount Sinai Hospital, New York, NY; Department of Neurosurgery (S.A.-H.), University of Illinois at Chicago; Neurosurgical Service (F.G.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Division of Neurosurgery (R.L.M.), St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre for Biomedical Science; and the Department of Surgery (R.L.M.), Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Canada.
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Horne MA, Flemming KD, Su IC, Stapf C, Jeon JP, Li D, Maxwell SS, White P, Christianson TJ, Agid R, Cho WS, Oh CW, Wu Z, Zhang JT, Kim JE, Ter Brugge K, Willinsky R, Brown RD, Murray GD, Al-Shahi Salman R. Clinical course of untreated cerebral cavernous malformations: a meta-analysis of individual patient data. Lancet Neurol 2016; 15:166-173. [PMID: 26654287 PMCID: PMC4710581 DOI: 10.1016/s1474-4422(15)00303-8] [Citation(s) in RCA: 216] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 09/26/2015] [Accepted: 10/20/2015] [Indexed: 01/06/2023]
Abstract
BACKGROUND Cerebral cavernous malformations (CCMs) can cause symptomatic intracranial haemorrhage (ICH), but the estimated risks are imprecise and predictors remain uncertain. We aimed to obtain precise estimates and predictors of the risk of ICH during untreated follow-up in an individual patient data meta-analysis. METHODS We invited investigators of published cohorts of people aged at least 16 years, identified by a systematic review of Ovid MEDLINE and Embase from inception to April 30, 2015, to provide individual patient data on clinical course from CCM diagnosis until first CCM treatment or last available follow-up. We used survival analysis to estimate the 5-year risk of symptomatic ICH due to CCMs (primary outcome), multivariable Cox regression to identify baseline predictors of outcome, and random-effects models to pool estimates in a meta-analysis. FINDINGS Among 1620 people in seven cohorts from six studies, 204 experienced ICH during 5197 person-years of follow-up (Kaplan-Meier estimated 5-year risk 15·8%, 95% CI 13·7-17·9). The primary outcome of ICH within 5 years of CCM diagnosis was associated with clinical presentation with ICH or new focal neurological deficit (FND) without brain imaging evidence of recent haemorrhage versus other modes of presentation (hazard ratio 5·6, 95% CI 3·2-9·7) and with brainstem CCM location versus other locations (4·4, 2·3-8·6), but age, sex, and CCM multiplicity did not add independent prognostic information. The 5-year estimated risk of ICH during untreated follow-up was 3·8% (95% CI 2·1-5·5) for 718 people with non-brainstem CCM presenting without ICH or FND, 8·0% (0·1-15·9) for 80 people with brainstem CCM presenting without ICH or FND, 18·4% (13·3-23·5) for 327 people with non-brainstem CCM presenting with ICH or FND, and 30·8% (26·3-35·2) for 495 people with brainstem CCM presenting with ICH or FND. INTERPRETATION Mode of clinical presentation and CCM location are independently associated with ICH within 5 years of CCM diagnosis. These findings can inform decisions about CCM treatment. FUNDING UK Medical Research Council, Chief Scientist Office of the Scottish Government, and UK Stroke Association.
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Affiliation(s)
- Margaret A Horne
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
| | | | - I-Chang Su
- Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, Toronto, ON, Canada
| | - Christian Stapf
- Département Hospitalo-Universitaire (DHU) NeuroVasc, Hôpital Lariboisière, Paris, France
| | - Jin Pyeong Jeon
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon, South Korea
| | - Da Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Susanne S Maxwell
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Philip White
- Institute of Neuroscience, Newcastle University, Newcastle-upon-Tyne, UK
| | | | - Ronit Agid
- Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, Toronto, ON, Canada
| | - Won-Sang Cho
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea
| | - Chang Wan Oh
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea
| | - Zhen Wu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun-Ting Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jeong Eun Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea
| | - Karel Ter Brugge
- Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, Toronto, ON, Canada
| | - Robert Willinsky
- Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, Toronto, ON, Canada
| | - Robert D Brown
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Gordon D Murray
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
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Kaku Y, Takei H, Miyai M, Yamashita K, Kokuzawa J. Surgical Approach to Ponto-mesencephalic Cavernoma. ACTA NEUROCHIRURGICA SUPPLEMENT 2016; 123:189-95. [DOI: 10.1007/978-3-319-29887-0_27] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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