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Hanaei S, Maroufi SF, Sadeghmousavi S, Nejati A, Paeinmahalli A, Ohadi MAD, Teo C. Telovelar vs. Transvermian approach for the fourth ventricle tumors: A systematic review and meta-analysis. Clin Neurol Neurosurg 2024; 240:108259. [PMID: 38579552 DOI: 10.1016/j.clineuro.2024.108259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/01/2024] [Accepted: 03/23/2024] [Indexed: 04/07/2024]
Abstract
BACKGROUND Tumors in the fourth ventricle can be critical due to the small size of the fourth ventricle, which causes symptoms to be detected even in the presence of lesser mass effects. A proper surgical approach to the fourth ventricle poses challenges due to its deep location and proximity to vital compartments within the brainstem. The two commonly used approaches to these tumors are the transvermian and telovelar approaches. METHODS A comprehensive systematic study was conducted based on a literature search of the databases. All case controls, cohorts, and case series including patients with fourth ventricle tumors, who were operated on with either telovelar or transvermian approaches were considered eligible. The evaluated outcomes were comparative postoperative complications of the telovelar vs. transvermian approach. After screening and data extraction, a meta-analysis was performed whenever adequate quantitative data were available. RESULTS Seven studies with a total number of 848 patients, discussed both telovelar and transvermian approaches, with comparative reporting of outcomes in each group. Postoperative outcomes including cranial nerve deficit, mutism, diplopia, CSF leak, need for CSF diversion, and postoperative gait disturbance were not significantly different between telovelar and transvermian approaches. CONCLUSION Postoperative complications were not significantly different between telovelar and transvermian approaches. Moreover, it could be proposed that such complications would be more likely to be a multifactorial matter concerning the patient's clinical condition, tumor characteristics, and surgeon's experience, rather than the surgical approach alone.
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Affiliation(s)
- Sara Hanaei
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Borderless Research, Advancement, and Innovation in Neuroscience Network (BRIANet), Tehran, Iran.
| | - Seyed Farzad Maroufi
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Neurosurgical Research Network, Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Shaghayegh Sadeghmousavi
- Borderless Research, Advancement, and Innovation in Neuroscience Network (BRIANet), Tehran, Iran; Neurosurgical Research Network, Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Arshia Nejati
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Abolfazl Paeinmahalli
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Borderless Research, Advancement, and Innovation in Neuroscience Network (BRIANet), Tehran, Iran.
| | - Mohammad Amin Dabbagh Ohadi
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Charles Teo
- Centre for Minimally Invasive Neurosurgery, Sydney, Australia; Department of Neurosurgery, NUH, Singapore, Singapore; Department of Neurosurgery, FJD University Hospital, Madrid, Spain; Department of Neurosurgery, Hanoi Medical University, Viet Nam.
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Tian Y, Xia H, Zhang L, Zhou JX. Detection of multidrug-resistant Acinetobacter baumannii by metagenomic next-generation sequencing in central nervous system infection after neurosurgery: A case report. Front Public Health 2022; 10:1028920. [PMID: 36339188 PMCID: PMC9634161 DOI: 10.3389/fpubh.2022.1028920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 10/10/2022] [Indexed: 01/29/2023] Open
Abstract
Background Central nervous system (CNS) infection is one of the most serious complications after neurosurgery. Traditional clinical methods are difficult to diagnose the pathogen of intracranial infection. Due to recent advances in genomic approaches, especially sequencing technologies, metagenomic next-generation sequencing (mNGS) has been applied in many research and clinical settings. Case presentation Here, we report a case of CNS infection with Acinetobacter baumannii in a 15-year-old woman, who previously underwent surgery for recurrence of ependymoma in the fourth ventricle. On the eleventh postoperative day, the patient had a high fever and leukocytosis in the cerebrospinal fluid (CSF). mNGS using CSF rapidly and accurately identified the causative pathogen as A. baumannii with carbapenem resistance genes blaOXA-23 and blaOXA-51, which were confirmed by subsequent culture and susceptibility tests within 5 days. During the disease, mNGS, culture, and drug susceptibility testing were continued to monitor changes in pathogenic bacteria and adjust medication. At present, there are no case reports on to the use of mNGS for detecting pathogens in postoperative infection with ependymoma and guide medication. Conclusion mNGS has great advantages in pathogen identification and even pathogen resistance prediction. Multiple mNGS examinations during the course of the disease play an important role in the dynamic monitoring of pathogens.
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Affiliation(s)
- Ying Tian
- Department of Critical Care Medicine, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Han Xia
- Department of Scientific Affairs, Hugo Biotechnologies, Co., Ltd, Beijing, China
| | - Linlin Zhang
- Department of Critical Care Medicine, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases, Beijing, China,*Correspondence: Linlin Zhang
| | - Jian-Xin Zhou
- Department of Critical Care Medicine, Beijing Tiantan Hospital, Capital Medical University, Beijing, China,Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases, Beijing, China,Beijing Shijitan Hospital, Capital Medical University, Beijing, China,Jian-Xin Zhou
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Sharma P, Sefcikova V, Sanders B, Soumpasis C, Waraich M, Samandouras G. Resection of Ependymomas Infiltrating the Fourth Ventricular Floor: Anatomosurgical and Stimulation Mapping Techniques. Oper Neurosurg (Hagerstown) 2022; 22:e189-e197. [DOI: 10.1227/ons.0000000000000120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 11/10/2021] [Indexed: 11/19/2022] Open
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Onorini N, Spennato P, Orlando V, Savoia F, Calì C, Russo C, De Martino L, de Santi MS, Mirone G, Ruggiero C, Quaglietta L, Cinalli G. The Clinical and Prognostic Impact of the Choice of Surgical Approach to Fourth Ventricular Tumors in a Single-Center, Single-Surgeon Cohort of 92 Consecutive Pediatric Patients. Front Oncol 2022; 12:821738. [PMID: 35280797 PMCID: PMC8912940 DOI: 10.3389/fonc.2022.821738] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
Objective A single-institution cohort of 92 consecutive pediatric patients harboring tumors involving the fourth ventricle, surgically treated via the telovelar or transvermian approach, was retrospectively reviewed in order to analyze the impact of surgical route on surgery-related outcomes and cumulative survival. Methods Clinical, radiological, surgical, and pathology details were retrospectively analyzed. We selected n = 6 surgery-related clinical and radiological outcomes: transient and permanent neurological deficits, duration of assisted ventilation, postoperative new onset medical events, postoperative cerebellar mutism, and extent of resection. We built univariate and multivariate logistic models to analyze the significance of relationships between the surgical routes and the outcomes. Cumulative survival (CS) was estimated by the cohort approach. Results There were 53 girls and 39 boys (mean age, 83 months). Telovelar approach was performed in 51 cases and transvermian approach in 41 cases. Early postoperative MRI studies showed complete removal in 57 cases (62%) and measurable residual tumor in 35 cases (38%). The average tumor residual volume was 1,316 cm3 (range, 0.016-4.231 cm3; median value, 0.9875 cm3). Residual disease was more often detected on immediate postop MRI after telovelar approach, but the difference was not significant. Cerebellar mutism was observed in 10 cases (11%). No significant difference in the onset of cerebellar mutism was detected between telovelar and transvermian approach. The choice of surgical approach did not significantly modify any other postoperative outcome and 1-/3-year CS of high-grade surgically treated tumors. Conclusions With the limitation of a single-center, single-surgeon retrospective series, our findings offer significant data to reconsider the real impact of the choice of the surgical route to the fourth ventricle on the incidence of cerebellar mutism and surgery-related morbidity. This seems to be in line with some recent reports in the literature. Surgical approach to the fourth ventricle should be individualized according to the location of the tumor, degree of vermian infiltration, and lateral and upward extension. Telovelar and transvermian approaches should not be considered alternative but complementary. Pediatric neurosurgeons should fully master both approaches and choose the one that they consider the best for the patient based on a thorough and careful evaluation of pre-operative imaging.
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Affiliation(s)
- Nicola Onorini
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Pietro Spennato
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Valentina Orlando
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy.,Division of Neurosurgery, Department of Neurosciences, Reproductive and Odontostomatological Sciences, Università degli Studi di Napoli Federico II, Naples, Italy
| | - Fabio Savoia
- Evaluative Epidemiology-Childhood Cancer Registry of Campania, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Camilla Calì
- Evaluative Epidemiology-Childhood Cancer Registry of Campania, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Carmela Russo
- Department of Pediatric Neurosciences, Pediatric Neuroradiology Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Lucia De Martino
- Department of Pediatric Neurosciences, Pediatric Neuro-Oncology Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Maria Serena de Santi
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Giuseppe Mirone
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Claudio Ruggiero
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Lucia Quaglietta
- Department of Pediatric Neurosciences, Pediatric Neuro-Oncology Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Giuseppe Cinalli
- Department of Pediatric Neurosciences, Pediatric Neurosurgery Unit, Santobono-Pausilipon Children's Hospital, Naples, Italy
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Krajewski S, Furtak J, Zawadka-Kunikowska M, Kachelski M, Birski M, Harat M. Comparison of the Functional State and Motor Skills of Patients after Cerebral Hemisphere, Ventricular System, and Cerebellopontine Angle Tumor Surgery. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:2308. [PMID: 35206503 PMCID: PMC8871731 DOI: 10.3390/ijerph19042308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/08/2022] [Accepted: 02/15/2022] [Indexed: 01/27/2023]
Abstract
Brain tumor location is an important factor determining the functional state after brain tumor surgery. We assessed the functional state and course of rehabilitation of patients undergoing surgery for brain tumors and assessed the location-dependent risk of loss of basic motor skills and the time needed for improvement after surgery. There were 835 patients who underwent operations, and 139 (16.6%) required rehabilitation during the inpatient stay. Karnofsky Performance Scale, Barthel Index, and the modified Rankin scale were used to assess functional status, whereas Gait Index was used to assess gait efficiency. Motor skills, overall length of stay (LOS) in hospital, and LOS after surgery were recorded. Patients were classified into four groups: cerebral hemisphere (CH), ventricular system (VS), and cerebellopontine angle (CPA) tumors; and a control group not requiring rehabilitation. VS tumor patients had the lowest scores in all domains compared with the other groups before surgery (p < 0.001). Their performance further deteriorated after surgery and by the day of discharge. They most often required long-lasting postoperative rehabilitation and had the longest LOS (35 days). Operation was most often required for CH tumors (77.7%), and all metrics and LOS parameters were better in these patients (p < 0.001). Patients with CPA tumors had the best outcomes (p < 0.001). Most patients (83.4%) with brain tumors did not require specialized rehabilitation, and LOS after surgery in the control group was on average 5.1 days after surgery. VS tumor patients represent a rehabilitation challenge. Postoperative rehabilitation planning must take the tumor site and preoperative condition into account.
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Affiliation(s)
- Stanisław Krajewski
- Department of Physiotherapy, University of Bydgoszcz, Unii Lubelskiej 4, 85-059 Bydgoszcz, Poland
- Department of Neurosurgery, 10th Military Research Hospital and Polyclinic, 85-681 Bydgoszcz, Poland; (J.F.); (M.K.); (M.B.); (M.H.)
| | - Jacek Furtak
- Department of Neurosurgery, 10th Military Research Hospital and Polyclinic, 85-681 Bydgoszcz, Poland; (J.F.); (M.K.); (M.B.); (M.H.)
- Franciszek Łukaszczyk Oncology Center, Department of Neurooncology and Radiosurgery, 85-796 Bydgoszcz, Poland
| | - Monika Zawadka-Kunikowska
- Department of Human Physiology, LudwikRydygier Collegium Medicum in Bydgoszcz Nicolaus Copernicus University in Torun, Karłowicza 24, 85-092 Bydgoszcz, Poland;
| | - Michał Kachelski
- Department of Neurosurgery, 10th Military Research Hospital and Polyclinic, 85-681 Bydgoszcz, Poland; (J.F.); (M.K.); (M.B.); (M.H.)
| | - Marcin Birski
- Department of Neurosurgery, 10th Military Research Hospital and Polyclinic, 85-681 Bydgoszcz, Poland; (J.F.); (M.K.); (M.B.); (M.H.)
| | - Marek Harat
- Department of Neurosurgery, 10th Military Research Hospital and Polyclinic, 85-681 Bydgoszcz, Poland; (J.F.); (M.K.); (M.B.); (M.H.)
- Department of Neurosurgery and Neurology, LudwikRydygier Collegium Medicum in Bydgoszcz Nicolaus Copernicus University in Torun, M. Sklodowskiej-Curie 9, 85-094 Bydgoszcz, Poland
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Sidpra J, Marcus AP, Löbel U, Toescu SM, Yecies D, Grant G, Yeom K, Mirsky DM, Marcus HJ, Aquilina K, Mankad K. Improved prediction of postoperative paediatric cerebellar mutism syndrome using an artificial neural network. Neurooncol Adv 2022; 4:vdac003. [PMID: 35233531 PMCID: PMC8882257 DOI: 10.1093/noajnl/vdac003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Postoperative paediatric cerebellar mutism syndrome (pCMS) is a common but severe complication which may arise following the resection of posterior fossa tumours in children. Two previous studies have aimed to preoperatively predict pCMS, with varying results. In this work, we examine the generalisation of these models and determine if pCMS can be predicted more accurately using an artificial neural network (ANN).
Methods
An overview of reviews was performed to identify risk factors for pCMS, and a retrospective dataset collected as per these defined risk factors from children undergoing resection of primary posterior fossa tumours. The ANN was trained on this dataset and its performance evaluated in comparison to logistic regression and other predictive indices via analysis of receiver operator characteristic curves. Area under the curve (AUC) and accuracy were calculated and compared using a Wilcoxon signed rank test, with p<0.05 considered statistically significant.
Results
204 children were included, of whom 80 developed pCMS. The performance of the ANN (AUC 0.949; accuracy 90.9%) exceeded that of logistic regression (p<0.05) and both external models (p<0.001).
Conclusion
Using an ANN, we show improved prediction of pCMS in comparison to previous models and conventional methods.
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Affiliation(s)
- Jai Sidpra
- University College London Medical School, London, WC1E 6DE, UK
- Developmental Biology and Cancer Section, University College London Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuroradiology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, WC1N 3JH, UK
| | - Adam P Marcus
- Department of Brain Sciences and Computing, Imperial College London, London, SW7 2BU, UK
| | - Ulrike Löbel
- Department of Neuroradiology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, WC1N 3JH, UK
| | - Sebastian M Toescu
- Department of Neurosurgery, Great Ormond Street Hospital for Children NHS Foundation Trust, London, WC1N 3JH, UK
- Developmental Imaging and Biophysics Section, University College London Great Ormond Street Institute of Child Health, London WC1N 1EH, UK
| | - Derek Yecies
- Department of Neurosurgery, Lucile Packard Children’s Hospital, Stanford, CA 94304, USA
| | - Gerald Grant
- Department of Neurosurgery, Lucile Packard Children’s Hospital, Stanford, CA 94304, USA
| | - Kristen Yeom
- Department of Neuroradiology, Lucile Packard Children’s Hospital, Stanford, CA 94304, USA
| | - David M Mirsky
- Department of Radiology, Children’s Hospital Colorado, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Hani J Marcus
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, WC1N 3BG, UK
- Wellcome / EPSRC Centre for Interventional and Surgical Sciences, University College London, London, WC1E 6BT, UK
| | - Kristian Aquilina
- Developmental Biology and Cancer Section, University College London Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neurosurgery, Great Ormond Street Hospital for Children NHS Foundation Trust, London, WC1N 3JH, UK
| | - Kshitij Mankad
- Developmental Biology and Cancer Section, University College London Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuroradiology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, WC1N 3JH, UK
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Schmitz AK, Munoz-Bendix C, Remke M, Brozou T, Borkhardt A, Hänggi D, Beez T. Second-look surgery after pediatric brain tumor resection – Single center analysis of morbidity and volumetric efficacy. BRAIN AND SPINE 2022; 2:100865. [PMID: 36248154 PMCID: PMC9560669 DOI: 10.1016/j.bas.2022.100865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/09/2022] [Accepted: 01/16/2022] [Indexed: 11/26/2022]
Abstract
Introduction Postoperative residual tumor can occur for intentional or unintentional reasons. Decision-making regarding second-look surgery has to weigh molecular biology, probability of total resection and prognostic relevance against potential additional morbidity. In interdisciplinary tumor boards the neurosurgeon has to estimate risk and efficacy of second-look surgery in individual cases, based on precise data. Research question Aim of this study was to provide such data by analyzing morbidity and volumetric efficacy of second-look surgery at a designated pediatric neuro-oncology unit. Material and methods Children who received second-look surgery in 2007–2018 after incomplete resections were analyzed retrospectively. Measurements were performed on early postoperative magnetic resonance imaging, comparing axial diameter-based measurement as well as computer-assisted volumetric analysis. Results 59 patients (37% of the overall cohort; 21 female; mean age: 8 ± 5 years) received a subtotal (n = 35) or near total (n = 24) resection. After interdisciplinary case review, 12 of these patients received second-look surgery mainly for residual ependymoma. This led to further tumor volume reduction in all cases (new degrees of resection: subtotal = 2, near total = 6, gross total = 4). No new permanent morbidity or perioperative mortality was observed. Discussion and conclusion Second-look surgery did not increase mortality and permanent morbidity, had an 8% rate of transient morbidity and achieved tumor volume reduction above 95% in 75% of selected cases, with 4 additional gross total resections. Second-look surgery is safe and effective with regard to volumetric outcome parameters even in cases with good initial resections, although the role of second-look surgery regarding oncological outcome has to be further investigated in times of personalized molecular medicine. Second-look surgery after incomplete initial resection of a pediatric brain tumor does not increase mortality and permanent surgical morbidity. It achieves a reduction of tumor volume above 95% in 75% of selected cases, with 4 additional gross total resections per 12 patients undergoing second-look surgery. Irrespective of two-dimensional or three-dimensional measurement methodology, criteria for near total resection correspond well and consistently showed an extent of resection above 95%. In the era of molecular and personalized medicine, children with specific tumors and molecular biology (e.g. PF-EPN-A ependymoma or group 4 medulloblastoma) might be candidates for second-look surgery after interdisciplinary review. This study gives the neurosurgeon accessible information to precisely characterize the neurosurgical implications of second-look surgery in such tumor board discussions.
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Affiliation(s)
- Ann Kristin Schmitz
- Department of Neurosurgery, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
- Department of Neurosurgery, Medical Faculty, University of Bonn, Bonn, Germany
| | | | - Marc Remke
- Department of Pediatric Oncology, Hematology and Immunology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Triantafyllia Brozou
- Department of Pediatric Oncology, Hematology and Immunology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Arndt Borkhardt
- Department of Pediatric Oncology, Hematology and Immunology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Daniel Hänggi
- Department of Neurosurgery, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Thomas Beez
- Department of Neurosurgery, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
- Corresponding author. Department of Neurosurgery, Medical Faculty, Heinrich-Heine-University, Moorenstrasse 5, 40225, Düsseldorf, Germany.
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Maloumeh EN, Khoshnoud RJ, Ebrahimzadeh K, Tavassol HH, Salari S, Mousavinejad A, Kargari A, Samadian M, Rezaei O. Surgical management of the fourth ventricular tumors using telovelar approach and the role of neuroendoscopy: Post-operative outcome and long-term results in a series of 52 cases. Clin Neurol Neurosurg 2020; 201:106419. [PMID: 33340840 DOI: 10.1016/j.clineuro.2020.106419] [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: 09/08/2020] [Revised: 11/13/2020] [Accepted: 12/04/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The telovelar approach is a surgical method performed through natural corridors of the brain to access the fourth ventricle. The aim of this study is to assess the results of this approach as well as the role of neuroendoscopy in surgical management of fourth ventricle tumors. MATERIAL AND METHODS A retrospective study was designed, and a series of 52 consecutive patients (32 male, 20 female) with fourth ventricle tumor undergoing telovelar approach was undertaken. In 10 patients (19 %) with a tumor invading the rostral fourth ventricle, an adjustable angle endoscope was also used to ensure total resection of the tumor. RESULTS Complete resection was obtained in majority of patients (94 %). 30 patients (57 %) required insertion of an external ventricular drain which was discontinued in all patients after 72 h. 2 patients (4 %) underwent permanent ventriculoperitoneal shunt. The postoperative complications included meningitis (8 %), transient facial nerve paralysis (8 %), transient sixth cranial nerve paralysis (6 %) and transient unilateral absence of the gag reflex (4 %). No patient experienced mutism and there was a mortality rate of 2 % (1 case) in current study. CONCLUSION In our experience, a high rate of total resection of the fourth ventricle tumors could be achieved with the telovelar approach associated with a low risk of surgical morbidity and mortality. Moreover, the use of an adjustable angle endoscope could be useful in patients with a tumor involving the rostral fourth ventricle to ensure total resection of the tumor and also to minimize the extent of telovelar dissection.
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Affiliation(s)
- Ehsan Nazari Maloumeh
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Reza Jalili Khoshnoud
- Functional Neurosurgery Research Center, Shohada-e-Tajrish Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Kaveh Ebrahimzadeh
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Hesameddin Hoseini Tavassol
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Sepideh Salari
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Ali Mousavinejad
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Atiye Kargari
- Tehran University of Medical Sciences, Pharmacy School, Tehran, Iran.
| | - Mohammad Samadian
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Omidvar Rezaei
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Aftahy AK, Barz M, Krauss P, Liesche F, Wiestler B, Combs SE, Straube C, Meyer B, Gempt J. Intraventricular neuroepithelial tumors: surgical outcome, technical considerations and review of literature. BMC Cancer 2020; 20:1060. [PMID: 33143683 PMCID: PMC7640680 DOI: 10.1186/s12885-020-07570-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/26/2020] [Indexed: 02/06/2023] Open
Abstract
Background Intraventricular neuroepithelial tumors (IVT) are rare lesions and comprise different pathological entities such as ependymomas, subependymomas and central neurocytomas. The treatment of choice is neurosurgical resection, which can be challenging due to their intraventricular location. Different surgical approaches to the ventricles are described. Here we report a large series of IVTs, its postoperative outcome at a single tertiary center and discuss suitable surgical approaches. Methods We performed a retrospective chart review at a single tertiary neurosurgical center between 03/2009–05/2019. We included patients that underwent resection of an IVT emphasizing on surgical approach, extent of resection, clinical outcome and postoperative complications. Results Forty five IVTs were resected from 03/2009 to 05/2019, 13 ependymomas, 21 subependymomas, 10 central neurocytomas and one glioependymal cyst. Median age was 52,5 years with 55.6% (25) male and 44.4% (20) female patients. Gross total resection was achieved in 93.3% (42/45). 84.6% (11/13) of ependymomas, 100% (12/21) of subependymomas, 90% (9/10) of central neurocytomas and one glioependymal cyst were completely removed. Postoperative rate of new neurological deficits was 26.6% (12/45). Postoperative new permanent cranial nerve deficits occurred in one case with 4th ventricle subependymoma and one in 4th ventricle ependymoma. Postoperative KPSS was 90% (IR 80–100). 31.1% of the patients improved in KPSS, 48.9% remained unchanged and 20% declined. Postoperative adverse events rate was 20.0%. Surgery-related mortality was 2.2%. The rate of shunt/cisternostomy-dependent hydrocephalus was 13.3% (6/45). 15.4% of resected ependymomas underwent adjuvant radiotherapy. Mean follow-up was 26,9 (±30.1) months. Conclusion Our surgical findings emphasize satisfactory complete resection throughout all entities. Surgical treatment can remain feasible, if institutional experience is given. Satisfying long-term survival and cure is possible by complete removal. Gross total resection should always be performed under function-remaining aspects due to mostly benign or slow growing nature of IVTs. Further data is needed to evaluate standard of care and alternative therapy options in rare cases of tumor recurrence or in case of patient collective not suitable for operative resection.
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Affiliation(s)
- A Kaywan Aftahy
- Department of Neurosurgery, Technical University Munich, Medical Faculty, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany.
| | - Melanie Barz
- Department of Neurosurgery, Technical University Munich, Medical Faculty, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Philipp Krauss
- Department of Neurosurgery, Technical University Munich, Medical Faculty, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Friederike Liesche
- Department of Neuropathology, Technical University Munich, School of Medicine, Klinikum rechts der Isar, Institute of Pathology, Munich, Germany
| | - Benedikt Wiestler
- Department of Neuroradiology, Technical University Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Stephanie E Combs
- Department of Radiation Oncology, Technical University Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany.,Department of Radiation Sciences (DRS) Helmholtz Zentrum Munich, Institute of Innovative Radiotherapy (iRT), Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, Munich, Germany
| | - Christoph Straube
- Department of Radiation Oncology, Technical University Munich, School of Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University Munich, Medical Faculty, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
| | - Jens Gempt
- Department of Neurosurgery, Technical University Munich, Medical Faculty, School of Medicine, Klinikum rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany
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10
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Toescu SM, Samarth G, Layard Horsfall H, Issitt R, Margetts B, Phipps KP, Jeelani NUO, Thompson DNP, Aquilina K. Fourth ventricle tumors in children: complications and influence of surgical approach. J Neurosurg Pediatr 2020; 27:52-61. [PMID: 33096529 DOI: 10.3171/2020.6.peds2089] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 06/10/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVES The goal of this study was to characterize the complications and morbidity related to the surgical management of pediatric fourth ventricle tumors. METHODS All patients referred to the authors' institution with posterior fossa tumors from 2002 to 2018 inclusive were screened to include only true fourth ventricle tumors. Preoperative imaging and clinical notes were reviewed to extract data on presenting symptoms; surgical episodes, techniques, and adjuncts; tumor histology; and postoperative complications. RESULTS Three hundred fifty-four children with posterior fossa tumors were treated during the study period; of these, 185 tumors were in the fourth ventricle, and 167 fourth ventricle tumors with full data sets were included in this analysis. One hundred patients were male (mean age ± SD, 5.98 ± 4.12 years). The most common presenting symptom was vomiting (63.5%). The most common tumor types, in order, were medulloblastoma (94 cases) > pilocytic astrocytoma (30 cases) > ependymoma (30 cases) > choroid plexus neoplasms (5 cases) > atypical teratoid/rhabdoid tumor (4 cases), with 4 miscellaneous lesions. Of the 67.1% of patients who presented with hydrocephalus, 45.5% had an external ventricular drain inserted (66.7% of these prior to tumor surgery, 56.9% frontal); these patients were more likely to undergo ventriculoperitoneal shunt (VPS) placement at a later date (p = 0.00673). Twenty-two had an endoscopic third ventriculostomy, of whom 8 later underwent VPS placement. Overall, 19.7% of patients had a VPS sited during treatment.Across the whole series, the transvermian approach was more frequent than the telovelar approach (64.1% vs 33.0%); however, the telovelar approach was significantly more common in the latter half of the series (p < 0.001). Gross-total resection was achieved in 70.7%. The most common postoperative deficit was cerebellar mutism syndrome (CMS; 28.7%), followed by new weakness (24.0%), cranial neuropathy (18.0%), and new gait abnormality/ataxia (12.6%). Use of intraoperative ultrasonography significantly reduced the incidence of CMS (p = 0.0365). There was no significant difference in the rate of CMS between telovelar or transvermian approaches (p = 0.745), and multivariate logistic regression modeling did not reveal any statistically significant relationships between CMS and surgical approach. CONCLUSIONS Surgical management of pediatric fourth ventricle tumors continues to evolve, and resection is increasingly performed through the telovelar route. CMS is enduringly the major postoperative complication in this patient population.
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Affiliation(s)
- Sebastian M Toescu
- 1Department of Neurosurgery, Great Ormond Street Hospital for Children, London.,2Developmental Imaging and Biophysics Section, UCL GOS Institute of Child Health, London
| | - Gargi Samarth
- 1Department of Neurosurgery, Great Ormond Street Hospital for Children, London
| | - Hugo Layard Horsfall
- 1Department of Neurosurgery, Great Ormond Street Hospital for Children, London.,3Department of Neurosurgery, Addenbrooke's Hospital, Cambridge; and
| | - Richard Issitt
- 4Digital Research Environment, Great Ormond Street Hospital for Children, DRIVE Office, London, United Kingdom
| | - Ben Margetts
- 4Digital Research Environment, Great Ormond Street Hospital for Children, DRIVE Office, London, United Kingdom
| | - Kim P Phipps
- 1Department of Neurosurgery, Great Ormond Street Hospital for Children, London
| | | | | | - Kristian Aquilina
- 1Department of Neurosurgery, Great Ormond Street Hospital for Children, London
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11
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Du R, Tafreshi A, Donoho D, Rutkowski M, Zada G. Endoscopic assisted craniotomy for resection of fourth ventricular lesions and confirmation of aqueductal patency via a suboccipital median aperture approach. J Clin Neurosci 2020; 80:50-55. [PMID: 33099366 DOI: 10.1016/j.jocn.2020.07.072] [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: 06/24/2019] [Revised: 07/26/2020] [Accepted: 07/30/2020] [Indexed: 11/15/2022]
Abstract
Adequate exposure to fourth ventricular (4V) lesions located adjacent to the cerebral aqueduct and superior medullary velum often mandates extensive telovelar dissection. We assessed the utility of endoscopic assistance via a median aperture approach during suboccipital resection of 4V lesions. We retrospectively reviewed a series of nine patients who underwent suboccipital resection of a 4V lesion via an endoscopic-assisted median aperture approach from 2011 to 2018. Our series included the following pathology: ependymoma (2), rosette-forming glioneuronal tumors (2), pilocytic astrocytoma (1), metastatic melanoma (1), epidermoid cyst (1), organized hematoma (1), and neurocysticercosis (1). Preoperative symptoms included headache (n = 8, 88.9%), nausea (n = 5, 55.6%), vomiting, dizziness, and gait disturbance (n = 4 each, 44.5%). In four cases, the endoscope was used for the majority of the resection or to resect additional tumor located rostrally in the 4V following maximal microscopic resection. In five patients, it was used to confirm extent of resection and patency of the cerebral aqueduct. Gross total resection was achieved in five patients (55.6%). No postoperative complications were attributed to use of the endoscope for additional resection. No patients required immediate CSF diversion, and one patient underwent ventriculoperitoneal (VP) shunt insertion over one year after initial biopsy/fenestration due to tumor progression. Our series is the first to demonstrate the utility of angled endoscopic assistance via a median aperture approach during microsurgical approaches for a variety of 4V lesions. Confirmation of patency of the cerebral aqueduct may help avoid requirements for CSF diversion.
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Affiliation(s)
- Robin Du
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States
| | - Ali Tafreshi
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States
| | - Daniel Donoho
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States
| | - Martin Rutkowski
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States
| | - Gabriel Zada
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States.
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12
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Ghali MGZ. Microsurgical techniques for achieving gross total resection of ependymomas of the fourth ventricle. Acta Chir Belg 2020; 120:149-166. [PMID: 32284025 DOI: 10.1080/00015458.2020.1711593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Ependymomas arising from the ventricular surface present a major challenge to achieving a complete operative extirpation when located in the fourth ventricle given the presence of significant adherence to the floor of the same. Overzealous dissection and removal of a tumor from this zone may precipitate potentially catastrophic neurological deficits attributable to cranial nucleopathies and cranial neuropathies. Consequently, the classic neurosurgical teaching has advised attempted gross total resection, leaving adherent residual in the floor of the fourth ventricle, in order to prevent the development of major cranial nucleopathies and cranial neuropathies. Following surgical tumoral extirpation, residual tumor is adjuvantly stereotactically irradiated. Authors have consequently developed novel neurophysiologically guided microsurgical techniques designed to remove adherent tumor from the fourth ventricular floor. These strategies have successfully and consistently facilitated gross total resection and improved clinical outcomes in patients harboring ependymomas of the fourth ventricle. We discuss and evaluate the innovation in microsurgical strategies developed to achieve complete operative extirpation of tumoral adherence to the floor of the fourth ventricle.
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Affiliation(s)
- Michael G. Z. Ghali
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA
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13
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Liu JK, Dodson VN. Telovelar approach for microsurgical resection of fourth ventricular subependymoma arising from rhomboid fossa: operative video and technical nuances. NEUROSURGICAL FOCUS: VIDEO 2019; 1:V5. [PMID: 36284878 PMCID: PMC9541721 DOI: 10.3171/2019.10.focusvid.19452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/15/2019] [Indexed: 11/29/2022]
Abstract
Fourth ventricular tumors have traditionally been removed via transvermian approaches, which can result in potential dysequilibrium and mutism. The telovelar approach is an excellent alternative to widely expose fourth ventricular tumors without transgressing the cerebellar vermis. This is achieved by opening the cerebellomedullary fissure and incising the tela choroidea and inferior medullary velum, which form the lower half of the roof of the fourth ventricle. In this operative video manuscript, the authors demonstrate microsurgical resection of a fourth ventricular subependymoma arising from the rhomboid fossa via the telovelar approach. The key technical nuance in this video is to demonstrate a gentle and safe technique to identify a dissectable plane to peel the tumor off of the rhomboid fossa using a microspreading technique with fine micro-bayonetted forceps. A gross-total resection was achieved, and the patient was neurologically intact. The video can be found here: https://youtu.be/ZEHHbUGb9zk.
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14
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Chen QB, Li ZH, Fu Y, Lv NN, Tian N, Han L, Tian Y. Downregulated long non-coding RNA LINC00899 inhibits invasion and migration of spinal ependymoma cells via RBL2-dependent FoxO pathway. Cell Cycle 2019; 18:2566-2579. [PMID: 31432742 DOI: 10.1080/15384101.2019.1652046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
This study is aimed to clarify the potential role of lncRNA LINC00899 in invasion and migration of spinal ependymoma cells through the FoxO pathway via RBL2. Spinal ependymoma related chip data (GSE50161 and GSE66354) was initially downloaded and differentially expressed lncRNAs were screened out. Fifty-eight cases of spinal ependymoma and normal ependymal tissues were collected. The effects of LINC00899 and RBL2 on the spinal ependymoma cell migration and invasion were determined using the third generation spinal ependymoma cells and transfection with LINC00899 vector, siRNA-LINC00899 and siRNA-RBL2. The expression of LINC00899, pathway and cell proliferation- and apoptosis-related factors was determined. Finally, we also detected cell proliferation, migration, invasion, cycle and apoptosis after transfection. Our results showed that LINC00899 was up-regulated in spinal ependymoma and RBL2 was confirmed as a target gene of LINC00899 and found to be involved in regulation of FoxO pathway. LINC00899 expression increased in spinal ependymoma tissues whereas RBL2 expression decreased. Moreover, we found that siRNA-LINC00899 could elevate RBL2, p21, p27 and Bax levels, decrease FoxO, Bcl-2, Vimentin, Annexin levels, reduced cell proliferation, migration and invasion and enhanced apoptosis. Taken together, our study suggests that down-regulated LINC00899 exerts anti-oncogenic effects on spinal ependymoma via RBL2-dependent FoxO, which provides a novel therapeutic target for the treatment of spinal ependymomas.
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Affiliation(s)
- Qun-Bang Chen
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University , Changchun , P.R. China
| | - Zhao-Hui Li
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University , Changchun , P.R. China
| | - Yao Fu
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University , Changchun , P.R. China
| | - Ning-Ning Lv
- Department of Nuclear Medicine, China-Japan Union Hospital of Jilin University , Changchun , P.R. China
| | - Nan Tian
- College of Life Science, Zhejiang Chinese Medical University , Hangzhou , P.R. China
| | - Liang Han
- Department of Pathology, China-Japan Union Hospital of Jilin University , Changchun , P.R. China
| | - Yu Tian
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University , Changchun , P.R. China
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15
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Bokhari R, You E, Zeiler FA, Bakhaidar M, Bajunaid K, Lasry O, Baeesa S, Marcoux J. Effect of Intrawound Vancomycin on Surgical Site Infections in Nonspinal Neurosurgical Procedures: A Systematic Review and Meta-Analysis. World Neurosurg 2019; 123:409-417.e7. [DOI: 10.1016/j.wneu.2018.10.168] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 11/29/2022]
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16
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Sinclair G, Benmakhlouf H, Martin H, Brigui M, Maeurer M, Dodoo E. The role of radiosurgery in the acute management of fourth ventricle compression due to brain metastases. Surg Neurol Int 2018; 9:112. [PMID: 29930878 PMCID: PMC5991270 DOI: 10.4103/sni.sni_387_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 12/26/2017] [Indexed: 11/16/2022] Open
Abstract
Background: Approximately 20–30% of all intracranial metastases are located in the posterior fossa. The clinical evolution hinges on factors such as tumor growth dynamics, local topographic conditions, performance status, and prompt intervention. Fourth ventricle (V4) compression with secondary life-threatening obstructive hydrocephalus remains a major concern, often requiring acute surgical intervention. We have previously reported on the application of adaptive hypofractionated Gamma Knife Radiosurgery in the acute management of critically located metastases, a technique known to us as rapid rescue radiosurgery (3R). We report the results of 3R in the management of posterior fossa lesions and ensuing V4 decompression. Case Descriptions: Four patients with V4 compression due to posterior fossa metastases were treated with 3R by three separate gamma knife radiosurgical sessions (GKRS) over a period of seven days. Mean V4 volume was 1.02 cm3 at GKRS 1, 1.13 cm3 at GKRS 2, and 1.12 cm3 at GKRS 3. Mean tumor volume during the week of treatment was 10 cm3 at both GKRS 1 and 2 and 9 cm3 at GKRS 3. On average, we achieved a tumor volume reduction of 52% and a V4 size increase of 64% at the first follow-up (4 weeks after GKRS 3). Long-term follow-up showed continued local tumor control, stable V4 volume, and absence of hydrocephalus. Conclusion: For this series, 3R was effective in terms of rapid tumor ablation, V4 decompression, and limited radiation-induced toxicity. This surgical procedure may become an additional tool in the management of intractable posterior fossa metastasis with V4 compression.
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Affiliation(s)
- G Sinclair
- Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - H Benmakhlouf
- Department of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - H Martin
- Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
| | - M Brigui
- Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
| | - M Maeurer
- Division of Therapeutic Immunology, Department of Laboratory Medicine, Karolinska Institute, Centre for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden
| | - E Dodoo
- Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
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17
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Four-Hand Suction-Irrigation Technique Leads to Gross Total Resection and Long-Term Progression-Free Survival in Fourth Ventricular Ependymoma. World Neurosurg 2017; 107:437-444. [DOI: 10.1016/j.wneu.2017.08.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/29/2017] [Accepted: 08/01/2017] [Indexed: 11/18/2022]
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