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Santhumayor BA, Mashiach E, Meng Y, Rotman L, Golub D, Bernstein K, Vasconcellos FDN, Silverman JS, Harter DH, Golfinos JG, Kondziolka D. Predictors of Hydrocephalus Risk After Stereotactic Radiosurgery for Vestibular Schwannomas: Utility of the Evans Index. Neurosurgery 2024:00006123-990000000-01310. [PMID: 39133020 DOI: 10.1227/neu.0000000000003140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 07/10/2024] [Indexed: 08/13/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Hydrocephalus after Gamma Knife® stereotactic radiosurgery (SRS) for vestibular schwannomas is a rare but manageable occurrence. Most series report post-SRS communicating hydrocephalus in about 1% of patients, thought to be related to a release of proteinaceous substances into the cerebrospinal fluid. While larger tumor size and older patient age have been associated with post-SRS hydrocephalus, the influence of baseline ventricular anatomy on hydrocephalus risk remains poorly defined. METHODS A single-institution retrospective cohort study examining patients who developed symptomatic communicating hydrocephalus after undergoing Gamma Knife® SRS for unilateral vestibular schwannomas from 2011 to 2021 was performed. Patients with prior hydrocephalus and cerebrospinal fluid diversion or prior surgical resection were excluded. Baseline tumor volume, third ventricle width, and Evans Index (EI)-maximum width of the frontal horns of the lateral ventricles/maximum internal diameter of the skull-were measured on axial postcontrast T1-weighted magnetic resonance imaging. RESULTS A total of 378 patients met the inclusion criteria; 14 patients (3.7%) developed symptomatic communicating hydrocephalus and 10 patients (2.6%) underwent shunt placement and 4 patients (1.1%) were observed with milder symptoms. The median age of patients who developed hydrocephalus was 69 years (IQR, 67-72) and for patients younger than age 65 years, the risk was 1%. For tumor volumes <1 cm3, the risk of requiring shunting was 1.2%. The odds of developing symptomatic hydrocephalus were 5.0 and 7.7 times higher in association with a baseline EI > 0.28 (P = .024) and tumor volume >3 cm3 (P = .007), respectively, in multivariate analysis. Fourth ventricle distortion on pre-SRS imaging was significantly associated with hydrocephalus incidence (P < .001). CONCLUSION Patients with vestibular schwannoma with higher baseline EI, larger tumor volumes, and fourth ventricle deformation are at increased odds of developing post-SRS hydrocephalus. These patients should be counseled regarding risk of hydrocephalus and carefully monitored after SRS.
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Affiliation(s)
- Brandon A Santhumayor
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - Elad Mashiach
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - Ying Meng
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - Lauren Rotman
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - Danielle Golub
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - Kenneth Bernstein
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | | | - Joshua S Silverman
- Department of Radiation Oncology, New York University Langone Health, New York, New York, USA
| | - David H Harter
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - John G Golfinos
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
| | - Douglas Kondziolka
- Department of Neurosurgery, New York University Langone Health, New York, New York, USA
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Campbell T, Goh SJ, Wadeson AM, Freeman SR, Rutherford SA, King AT, Hammerbeck-Ward CL, Pathmanaban O, Entwistle H, Bird J, Axon PR, Moffat DA, Lloyd SK. Changes in audiovestibular handicap following treatment of vestibular schwannomas. J Laryngol Otol 2024; 138:608-614. [PMID: 38017610 PMCID: PMC11096832 DOI: 10.1017/s002221512300213x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 09/23/2023] [Accepted: 10/02/2023] [Indexed: 11/30/2023]
Abstract
OBJECTIVE This study aimed to assess degree of audiovestibular handicap in patients with vestibular schwannoma. METHODS Audiovestibular handicap was assessed using the Hearing Handicap Inventory, Tinnitus Handicap Inventory and Dizziness Handicap Inventory. Patients completed questionnaires at presentation and at least one year following treatment with microsurgery, stereotactic radiosurgery or observation. Changes in audiovestibular handicap and factors affecting audiovestibular handicap were assessed. RESULTS All handicap scores increased at follow up, but not significantly. The Tinnitus Handicap Inventory and Dizziness Handicap Inventory scores predicted tinnitus and dizziness respectively. The Hearing Handicap Inventory was not predictive of hearing loss. Age predicted Tinnitus Handicap Inventory score and microsurgery was associated with a deterioration in Dizziness Handicap Inventory score. CONCLUSION Audiovestibular handicap is common in patients with vestibular schwannoma, with 75 per cent having some degree of handicap in at least one inventory. The overall burden of handicap was, however, low. The increased audiovestibular handicap over time was not statistically significant, irrespective of treatment modality.
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Affiliation(s)
- Tim Campbell
- Brighton and Sussex Medical School, Brighton, UK
| | | | - Andrea M Wadeson
- Department of Neurosurgery, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
| | - Simon R Freeman
- Department of Otolaryngology, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
| | - Scott A Rutherford
- Department of Neurosurgery, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
| | - Andrew T King
- Department of Neurosurgery, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
- Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Manchester, UK
- Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Brain and Mental Health, University of Manchester, Manchester, UK
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Brain and Mental Health, University of Manchester, Manchester, UK
| | - Charlotte L Hammerbeck-Ward
- Department of Neurosurgery, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
| | - Omar Pathmanaban
- Department of Neurosurgery, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
- Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Manchester, UK
| | - Helen Entwistle
- Department of Neurosurgery, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
| | - Judith Bird
- Department of Otolaryngology, Addenbrooke's Hospital, Cambridge, UK
| | - Patrick R Axon
- Department of Otolaryngology, Addenbrooke's Hospital, Cambridge, UK
| | - David A Moffat
- Department of Otolaryngology, Addenbrooke's Hospital, Cambridge, UK
| | - Simon K Lloyd
- Department of Otolaryngology, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Trust, Manchester, UK
- Division of Cancer Sciences, School of Medical Sciences, University of Manchester, Manchester, UK
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Lakshmipathy D, Winter E, Fritz C, Harris J, Gentile M, Moreira A, Rajasekaran K. Managing vestibular schwannomas with radiosurgery and radiotherapy: AGREE II appraisal of clinical practice guidelines. J Med Imaging Radiat Oncol 2024; 68:462-471. [PMID: 38477433 DOI: 10.1111/1754-9485.13640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/03/2024] [Indexed: 03/14/2024]
Abstract
INTRODUCTION Vestibular schwannomas (VSs) are rare, benign intracranial tumours that have prompted clinical practice guideline (CPG) creation given their complex management. Our aim was to utilize the Appraisal of Guidelines for Research and Evaluation (AGREE II) instrument to assess if such CPGs on the management of VSs with radiosurgery and radiotherapy are of acceptable quality. METHODS Relevant CPGs were identified following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocols. Experienced reviewers then extracted general CPG properties and rated their quality via the AGREE II instrument. Intraclass correlation coefficients (ICCs) were quantified to assess interrater reliability. RESULTS Nine CPGs on the management of VSs with radiosurgery and radiotherapy were identified. All CPGs were created in the past six years and developed recommendations based on literature review and expert consensus. One guideline was deemed as high quality with seven others being moderate and one being low in quality. The clarity of the presentation domain had the highest mean scaled domain score of 96.0%. The domains of stakeholder involvement and applicability had the lowest means of 49.2% and 47.2%, respectively. ICCs were either good or excellent across all domains. CONCLUSION Current CPGs on the management of VSs with radiosurgery and radiotherapy are of acceptable quality but would greatly benefit from improvements in applicability, stakeholder involvement, editorial independence and rigour of development. We recommend CPG authors reference the European Association of Neuro-Oncology (EANO) guideline as a developmental framework with the Congress of Neurological Surgeons/American Association of Neurological Surgeons (CNS/AANS) CPG being a valid alternative.
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Affiliation(s)
- Deepak Lakshmipathy
- Department of Otorhinolaryngology-Head & Neck Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Eric Winter
- Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Christian Fritz
- Department of Otorhinolaryngology-Head & Neck Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jacob Harris
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Michelle Gentile
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Alvaro Moreira
- Department of Paediatrics, University of Texas Health Science Centre at San Antonio, San Antonio, Texas, USA
| | - Karthik Rajasekaran
- Department of Otorhinolaryngology-Head & Neck Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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King AM, Cooper JN, Oganezova K, Mittal J, McKenna K, Godur DA, Zalta M, Danesh AA, Mittal R, Eshraghi AA. Vestibular Schwannoma and Tinnitus: A Systematic Review of Microsurgery Compared to Gamma Knife Radiosurgery. J Clin Med 2024; 13:3065. [PMID: 38892775 PMCID: PMC11173275 DOI: 10.3390/jcm13113065] [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: 04/09/2024] [Revised: 05/16/2024] [Accepted: 05/18/2024] [Indexed: 06/21/2024] Open
Abstract
Background: Vestibular schwannoma (VS) is a benign tumor of the eighth cranial nerve formed from neoplastic Schwann cells. Although VS can cause a variety of symptoms, tinnitus is one of the most distressing symptoms for patients and can greatly impact quality of life. The objective of this systematic review is to comprehensively examine and compare the outcomes related to tinnitus in patients undergoing treatment for VS. Specifically, it evaluates patient experiences with tinnitus following the removal of VS using the various surgical approaches of traditional surgical resection and gamma knife radiosurgery (GKS). By delving into various aspects such as the severity of tinnitus post-treatment, the duration of symptom relief, patient quality of life, new onset of tinnitus after VS treatment, and any potential complications or side effects, this review aims to provide a detailed analysis of VS treatment on tinnitus outcomes. Methods: Following PRISMA guidelines, articles were included from PubMed, Science Direct, Scopus, and EMBASE. Quality assessment and risk of bias analysis were performed using a ROBINS-I tool. Results: Although VS-associated tinnitus is variable in its intensity and persistence post-resection, there was a trend towards a decreased tinnitus burden in patients. Irrespective of the surgical approach or the treatment with GKS, there were cases of persistent or worsened tinnitus within the studied cohorts. Conclusion: The findings of this systematic review highlight the complex relationship between VS resection and tinnitus outcomes. These findings underscore the need for individualized patient counseling and tailored treatment approaches in managing VS-associated tinnitus. The findings of this systematic review may help in guiding clinicians towards making more informed and personalized healthcare decisions. Further studies must be completed to fill gaps in the current literature.
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Affiliation(s)
- Ava M. King
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Jaimee N. Cooper
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
- School of Medicine, New York Medical College, Valhalla, NY 10595, USA
| | - Karina Oganezova
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Jeenu Mittal
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Keelin McKenna
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Dimitri A. Godur
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Max Zalta
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Ali A. Danesh
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
- Department of Communication Sciences and Disorders, Florida Atlantic University, Boca Raton, FL 33431, USA
- Department of Integrated Medical Sciences, Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Rahul Mittal
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
| | - Adrien A. Eshraghi
- Department of Otolaryngology, Hearing Research and Cochlear Implant Laboratory, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (A.M.K.); (J.N.C.); (J.M.); (K.M.); (D.A.G.); (M.Z.); (A.A.D.); (R.M.)
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33143, USA
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Flores-Milan G, Rainone GJ, Piper K, Peto I, Danner C, Allen KP, Liu SS, van Loveren H, Agazzi S. Temporal lobe injury with middle fossa approach to intracanalicular vestibular schwannomas: a systematic review. Neurosurg Rev 2024; 47:188. [PMID: 38658423 DOI: 10.1007/s10143-024-02425-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/15/2024] [Accepted: 04/20/2024] [Indexed: 04/26/2024]
Abstract
There are several surgical approaches for vestibular schwannoma (VS) resection. However, management has gradually shifted from microsurgical resection, toward surveillance and radiosurgery. One of the arguments against microsurgery via the middle fossa approach (MFA) is the risk of temporal lobe retraction injury or sequelae. Here, we sought to evaluate the incidence of temporal lobe retraction injury or sequela from a MFA via a systematic review of the existing literature. This systematic review was conducted according to the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines. Relevant studies reporting temporal lobe injury or sequela during MFA for VS were identified. Data was aggregated and subsequently analyzed to evaluate the incidence of temporal lobe injury. 22 studies were included for statistical analysis, encompassing 1522 patients that underwent VS resection via MFA. The overall rate of temporal lobe sequelae from this approach was 0.7%. The rate of CSF leak was 5.9%. The rate of wound infection was 0.6%. Meningitis occurred in 1.6% of patients. With the MFA, 92% of patients had good facial outcomes, and 54.9% had hearing preservation. Our series and literature review support that temporal lobe retraction injury or sequelae is an infrequent complication from an MFA for intracanalicular VS resection.
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Affiliation(s)
- Gabriel Flores-Milan
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA
| | - Gersham J Rainone
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA.
| | - Keaton Piper
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA
| | - Ivo Peto
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA
| | - Christopher Danner
- Tampa Bay Hearing and Balance Center, 5 Tampa General Cir, Ste 610, Tampa, FL, USA
| | - Kyle P Allen
- Tampa Bay Hearing and Balance Center, 5 Tampa General Cir, Ste 610, Tampa, FL, USA
| | - Shih Sing Liu
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA
| | - Harry van Loveren
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA
| | - Siviero Agazzi
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida, 2 Tampa General Circle, Tampa, FL, USA
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Kosaraju N, Moore LS, Mulders JY, Blevins NH. Sporadic vestibular schwannoma in a pediatric population: a case series. Childs Nerv Syst 2024; 40:635-645. [PMID: 37889276 DOI: 10.1007/s00381-023-06184-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/10/2023] [Indexed: 10/28/2023]
Abstract
PURPOSE To describe the characteristics, management, and outcomes of pediatric patients with sporadic vestibular schwannoma (sVS). METHODS This was a case series at a tertiary care center. Patients were identified through a research repository and chart review. Interventions were microsurgery, stereotactic radiosurgery (SRS), and observation. Outcome measures were tumor control, facial nerve function, and hearing. RESULTS Eight patients over 2006-2022 fulfilled inclusion criteria (unilateral VS without genetic or clinical evidence of neurofibromatosis type 2 (NF2); age ≤ 21) with a mean age of 17 years (14-20). Average greatest tumor length in the internal auditory canal was 9.7 mm (4.0-16.1). Average greatest tumor dimension (4/8 tumors) in the cerebellopontine angle was 19.1 mm (11.3-26.8). Primary treatment was microsurgery in five (62.5%) patients, observation in two (25%), and SRS in one (12.5%). Four (80%) surgical patients had gross total resections, and one (20%) had regrowth post-near total resection and underwent SRS. One observed patient and the primary SRS patient have remained radiographically stable for 3.5 and 7 years, respectively. The other observed patient required surgery for tumor growth after 12 months of observation. Two surgical patients had poor facial nerve outcomes. All post-procedural patients developed anacusis. Mean follow-up was 3 years (0.5-7). CONCLUSIONS We describe one of the largest reported cohorts of pediatric sVS in the USA. Diligent exclusion of NF2 is critical. Given the high likelihood of eventually requiring intervention and known adverse effects of SRS, microsurgery remains the preferred treatment. However, observation can be considered in select situations.
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Affiliation(s)
- Nikitha Kosaraju
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA
- David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Lindsay S Moore
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA
| | - Jip Y Mulders
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA
- Leiden University Medical Center, Leiden, The Netherlands
| | - Nikolas H Blevins
- Division of Otology/Neurotology, Department of Otolaryngology - Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Rd, Palo Alto, Stanford, CA, 94305-5739, USA.
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Lassaletta L, Acle Cervera L, Altuna X, Amilibia Cabeza E, Arístegui Ruiz M, Batuecas Caletrio Á, Benítez Del Rosario J, Cabanillas Farpón R, Costales Marcos M, Escada P, Espinosa-Sánchez JM, García Leal R, Gavilán J, Gómez Martínez J, González-Aguado R, Martinez-Glez V, Guerra Jiménez G, Harguindey Antolí-Candela A, Hernández García BJ, Orús Dotú C, Polo López R, Manrique M, Martín Sanz E, Martínez Álvarez R, Martínez H, Martínez-Martínez M, Rey-Martinez J, Ropero Romero F, Santa Cruz Ruiz S, Vallejo LÁ, Soto Varela A, Varela-Nieto I, Morales Puebla JM. Clinical practice guideline on the management of vestibular schwannoma. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2024; 75:108-128. [PMID: 38346489 DOI: 10.1016/j.otoeng.2023.10.005] [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: 08/23/2023] [Accepted: 10/19/2023] [Indexed: 02/18/2024]
Abstract
INTRODUCTION Vestibular schwannoma (VS) is the most common tumour of the cerebellopontine angle. The greater accessibility to radiological tests has increased its diagnosis. Taking into account the characteristics of the tumour, the symptoms and the age of the patient, three therapeutic strategies have been proposed: observation, surgery or radiotherapy. Choosing the most appropriate for each patient is a frequent source of controversy. MATERIAL AND METHODS This paper includes an exhaustive literature review of issues related to VS that can serve as a clinical guide in the management of patients with these lesions. The presentation has been oriented in the form of questions that the clinician usually asks himself and the answers have been written and/or reviewed by a panel of national and international experts consulted by the Otology Commission of the SEORL-CCC. RESULTS A list has been compiled containing the 13 most controversial thematic blocks on the management of VS in the form of 50 questions, and answers to all of them have been sought through a systematic literature review (articles published on PubMed and Cochrane Library between 1992 and 2023 related to each thematic area). Thirty-three experts, led by the Otology Committee of SEORL-CCC, have analyzed and discussed all the answers. In Annex 1, 14 additional questions divided into 4 thematic areas can be found. CONCLUSIONS This clinical practice guideline on the management of VS offers agreed answers to the most common questions that are asked about this tumour. The absence of sufficient prospective studies means that the levels of evidence on the subject are generally medium or low. This fact increases the interest of this type of clinical practice guidelines prepared by experts.
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Affiliation(s)
- Luis Lassaletta
- Servicio de Otorrinolaringología, Hospital Universitario La Paz, Madrid, Spain.
| | | | - Xabier Altuna
- Servicio de Otorrinolaringología, Hospital Universitario Donostia, San Sebastián, Guipúzcoa, Spain
| | - Emilio Amilibia Cabeza
- Servicio de Otorrinolaringología, Hospital Universitario Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Miguel Arístegui Ruiz
- Servicio de Otorrinolaringología, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Ángel Batuecas Caletrio
- Servicio de Otorrinolaringología, Complejo Asistencial Universitario de Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Salamanca, Spain
| | - Jesús Benítez Del Rosario
- Servicio de Otorrinolaringología, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, Spain
| | | | - María Costales Marcos
- Servicio de Otorrinolaringología, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Pedro Escada
- Servicio de Otorrinolaringología, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisboa, Portugal
| | - Juan Manuel Espinosa-Sánchez
- Servicio de Otorrinolaringología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria (ibs.GRANADA), Granada, Spain
| | - Roberto García Leal
- Servicio de Neurocirugía, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Javier Gavilán
- Servicio de Otorrinolaringología, Hospital Universitario La Paz, Madrid, Spain; Instituto de Investigación Sanitaria del Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - Justo Gómez Martínez
- Servicio de Otorrinolaringología, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Rocío González-Aguado
- Servicio de Otorrinolaringología, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, Spain
| | - Victor Martinez-Glez
- Center for Genomic Medicine, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí (I3PT-CERCA), Universitat Autónoma de Barcelona, Sabadell, Barcelona, Spain
| | - Gloria Guerra Jiménez
- Servicio de Otorrinolaringología, Complejo Hospitalario Universitario Insular Materno Infantil de las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Las Palmas, Spain
| | | | | | - Cesar Orús Dotú
- Servicio de Otorrinolaringología, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Rubén Polo López
- Servicio de Otorrinolaringología, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Manuel Manrique
- Servicio de Otorrinolaringología, Clínica Universitaria de Navarra, Pamplona, Navarra, Spain
| | - Eduardo Martín Sanz
- Servicio de Otorrinolaringología, Hospital Universitario de Getafe, Getafe, Madrid, Spain
| | | | - Henry Martínez
- Servicio de Otorrinolaringología, Hospital Universitario Clínica San Rafael, Sur Bogotá D. C., Colombia; Servicio de Otorrinolaringología, Hospital San José, Bogotá, Colombia
| | | | - Jorge Rey-Martinez
- Servicio de Otorrinolaringología, Hospital Universitario Donostia, San Sebastián, Guipúzcoa, Spain
| | | | - Santiago Santa Cruz Ruiz
- Servicio de Otorrinolaringología, Complejo Asistencial Universitario de Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Salamanca, Spain
| | - Luis Ángel Vallejo
- Servicio de Otorrinolaringología, Hospital Universitario Río Hortega, Valladolid, Spain
| | - Andrés Soto Varela
- Servicio de Otorrinolaringología, Departamento de Cirugía y Especialidades Médico-Quirúrgicas, Complexo Hospitalario Universitario de Santiago, Universidade de Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, A Coruña, Spain
| | - Isabel Varela-Nieto
- Instituto de Investigación Sanitaria del Hospital Universitario La Paz (IdiPAZ), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Audición y Mielinopatías, Instituto de Investigaciones Biomédicas Alberto Sols, CSIC-UAM, CIBERER-ISCIII, Madrid, Spain
| | - José Manuel Morales Puebla
- Servicio de Otorrinolaringología, Hospital Universitario La Paz, Madrid, Spain; Instituto de Investigación Sanitaria del Hospital Universitario La Paz (IdiPAZ), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras, Instituto de Salud Carlos III, Madrid, Spain
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8
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Szymoniuk M, Kochański M, Wilk K, Miazga D, Kanonik O, Dryla A, Kamieniak P. Stereotactic radiosurgery for Koos grade IV vestibular schwannoma: a systematic review and meta-analysis. Acta Neurochir (Wien) 2024; 166:101. [PMID: 38393397 DOI: 10.1007/s00701-024-05995-2] [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: 11/05/2023] [Accepted: 02/01/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND Stereotactic radiosurgery (SRS) is a well-established treatment option for Koos stage I-III vestibular schwannomas (VS), often used as the first line of treatment or after subtotal resection. However, the optimal treatment for Koos-IV VS remains unclear. Therefore, our study aimed to evaluate the effectiveness of SRS as a primary treatment for large VS classified as Koos-IV. METHODS A systematic search was performed on December 28th, 2022, based on PubMed, Web of Science, and Scopus according to the PRISMA statement. The review was updated on September 7th, 2023. The risk of bias was assessed using the NIH Quality Assessment Tool. The R software (ver. 4.3.2) was used for all quantitative analyses and preparation of the forest plots. Publication bias and sensitivity analysis were performed to evaluate the reliability of the obtained results. RESULTS Among 2941 screened records, ten studies (1398 patients) have been included in quantitative synthesis. The overall tumor control rate was 90.7% (95%CI 86.3-94.4). Kaplan-Meier estimates of tumor control at 2, 6, and 10 years were 96.0% (95% CI 92.9-97.6%), 88.8% (95% CI 86.9-89.8%), and 84.5% (95% CI, 81.2-85.8%), respectively. The overall hearing preservation rate was 56.5% (95%CI 37-75.1). Kaplan-Meier estimates of hearing preservation rate at 2, 6, and 10 years were 77.1% (95% CI 67.9-82.5%), 53.5% (95% CI 44.2-58.5%), and 38.1% (95% CI 23.4-40.7%), respectively. The overall facial nerve preservation rate was 100% (95%CI 99.9-100.0). The overall trigeminal neuropathy rate reached 5.7% (95%CI 2.9-9.2). The overall rate of new-onset hydrocephalus was 5.6% (95%CI 3-9). The overall rates of worsening or new-onset tinnitus and vertigo were 6.8% (95%CI 4.2-10.0) and 9.1% (95%CI 2.1-19.6) respectively. No publication bias was detected according to the used methods. CONCLUSIONS Our systematic review and meta-analysis demonstrated a high overall tumor control rate, excellent facial nerve preservation, and low incidence of new-onset or worsened tinnitus and vertigo. However, several drawbacks associated with SRS should be noted, such as the presence of post-SRS hydrocephalus risk, mediocre long-term hearing preservation, and the lack of immediate tumor decompression. Nevertheless, the use of SRS may be beneficial in appropriately selected cases of Koos-IV VS. Moreover, further prospective studies directly comparing SRS with surgery are necessary to determine the optimal treatment for large VS and verify our results on a higher level of evidence. Registration and protocol: CRD42023389856.
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Affiliation(s)
- Michał Szymoniuk
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland.
| | - Marek Kochański
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland
| | - Karolina Wilk
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland
| | - Dominika Miazga
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland
| | - Oliwia Kanonik
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland
| | - Aleksandra Dryla
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland
| | - Piotr Kamieniak
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Ul. Jaczewskiego 8, 20-954, Lublin, Poland
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9
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Hosmann A, Kamdar V, Misra BK. Malignant transformation of vestibular schwannoma following radiosurgery-a case report and review of the literature. Acta Neurochir (Wien) 2024; 166:52. [PMID: 38289497 DOI: 10.1007/s00701-024-05921-6] [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: 08/12/2023] [Accepted: 11/07/2023] [Indexed: 02/01/2024]
Abstract
Malignant transformation of vestibular schwannoma (VS) post-radiosurgery is an extremely rare but life-threatening complication. We present a patient who underwent two surgeries for a benign VS and received Gamma Knife radiosurgery for residual tumour. Five and a half years post-radiosurgery, the patient was reoperated for symptomatic recurrence of the tumour. Histopathology confirmed the diagnosis of a high-grade spindle cell sarcoma. Although near-total resection was uneventful, the patient deteriorated rapidly, and comfort care was chosen. This report is the 13th documented case of histopathologically confirmed malignant transformation of a benign VS that strictly meets the modified Cahan's criteria, suggesting the direct link to radiosurgery-induced malignancy.
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Affiliation(s)
- Arthur Hosmann
- Department of Neurosurgery & Gamma Knife Surgery, P D Hinduja National Hospital & Medical Research Centre, Veer Savarkar Marg, Mumbai, India
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Vatsal Kamdar
- Department of Neurosurgery & Gamma Knife Surgery, P D Hinduja National Hospital & Medical Research Centre, Veer Savarkar Marg, Mumbai, India
| | - Basant K Misra
- Department of Neurosurgery & Gamma Knife Surgery, P D Hinduja National Hospital & Medical Research Centre, Veer Savarkar Marg, Mumbai, India.
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10
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Kang H, Ji SY, Kim C, Koo J, Song J, Choi BY, Hwang K, Han JH. Hearing preservation after stereotactic radiosurgery for sporadic intracanalicular vestibular schwannomas classified as Koos grade 1. Cancer Med 2024; 13:e6990. [PMID: 38348957 PMCID: PMC10839155 DOI: 10.1002/cam4.6990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/19/2023] [Accepted: 01/22/2024] [Indexed: 02/15/2024] Open
Abstract
INTRODUCTION The mechanism of hearing loss following stereotactic radiosurgery (SRS) for vestibular schwannomas (VSs) remains unclear. There is conflicting evidence regarding cochlear nerve damage by transient volume expansion of VSs after radiosurgery and radiation-induced cochlear damage. This study aimed to investigate whether there is a specific patient population that can achieve definite hearing preservation after SRS for VSs. METHODS A total of 37 consecutive patients with sporadic unilateral intracanalicular VSs and serviceable hearing (Gardner-Roberson [G-R] class I or II) were treated with SRS from 2009 to 2023. This is a retrospective study. Survival analysis with Cox regression for hearing deterioration was performed. RESULTS The median age was 55 years old. The median tumor volume was 0.089 cm3 , and the median marginal dose was 12.0 Gy. Nonserviceable hearing deterioration occurred in 9 patients (24.3%), with a median onset of 11.9 months after SRS. The actuarial rates of serviceable hearing preservation were 86%, 82%, and 70% at 1, 2, and 3 years after SRS, respectively. In a multivariate analysis, only baseline pure tone average > 30 dB increased the risk of nonserviceable hearing deterioration with significant hazard ratio. There were 13 patients with petit VSs whose tumor volume was smaller than 0.05 cm3 , and 11 of them were treated by a 4-mm single shot with a marginal dose of 12 Gy. None of the 13 patients had nonserviceable hearing deterioration. CONCLUSIONS Petit VSs that can be treated with 4-mm single or double shots with a marginal dose of 12 Gy may achieve hearing preservation after SRS.
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Affiliation(s)
- Ho Kang
- Department of NeurosurgerySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - So Young Ji
- Department of NeurosurgerySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - Chae‐Yong Kim
- Department of NeurosurgerySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - Ja‐Won Koo
- Department of OtorhinolaryngologySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - Jae‐Jin Song
- Department of OtorhinolaryngologySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - Byung Yoon Choi
- Department of OtorhinolaryngologySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - Kihwan Hwang
- Department of NeurosurgerySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
| | - Jung Ho Han
- Department of NeurosurgerySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnam‐siKorea
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11
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Shinya Y, Teranishi Y, Hasegawa H, Miyawaki S, Sugiyama T, Shin M, Kawashima M, Umekawa M, Katano A, Nakatomi H, Saito N. Long-term outcomes of stereotactic radiosurgery for intracranial schwannoma in neurofibromatosis type 2: a genetic analysis perspective. J Neurooncol 2024; 166:185-194. [PMID: 38151698 DOI: 10.1007/s11060-023-04530-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 12/04/2023] [Indexed: 12/29/2023]
Abstract
PURPOSE Neurofibromatosis type 2 (NF2) is intractable because of multiple tumors involving the nervous system and is clinically diverse and genotype-dependent. Stereotactic radiosurgery (SRS) for NF2-associated schwannomas remains controversial. We aimed to investigate the association between radiosurgical outcomes and mutation types in NF2-associated schwannomas. METHODS This single-institute retrospective study included consecutive NF2 patients with intracranial schwannomas treated with SRS. The patients' types of germline mutations ("Truncating," "Large deletion," "Splice site," "Missense," and "Mosaic") and Halliday's genetic severity scores were examined, and the associations with progression-free rate (PFR) and overall survival (OS) were analyzed. RESULTS The study enrolled 14 patients with NF2 with 22 associated intracranial schwannomas (median follow-up, 102 months). The PFRs in the entire cohort were 95% at 5 years and 90% at 10-20 years. The PFRs tended to be worse in patients with truncating mutation exons 2-13 than in those with other mutation types (91% at 5 years and 82% at 10-20 years vs. 100% at 10-20 years, P = 0.140). The OSs were 89% for patients aged 40 years and 74% for those aged 60 years in the entire cohort and significantly lower in genetic severity group 3 than in the other groups (100% vs. 50% for those aged 35 years; P = 0.016). CONCLUSION SRS achieved excellent PFR for NF2-associated intracranial schwannomas in the mild (group 2A) and moderate (group 2B) groups. SRS necessitates careful consideration for the severe group (group 3), especially in cases with NF2 truncating mutation exons 2-13.
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Affiliation(s)
- Yuki Shinya
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Yu Teranishi
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hirotaka Hasegawa
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Satoru Miyawaki
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Takehiro Sugiyama
- Diabetes and Metabolism Information Center, Research Institute, National Center for Global Health and Medicine, Tokyo, 162-8655, Japan
- Department of Health Services Research, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Masahiro Shin
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Mariko Kawashima
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Motoyuki Umekawa
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Atsuto Katano
- Department of Radiology, The University of Tokyo Hospital, Tokyo, 113-8655, Japan
| | - Hirofumi Nakatomi
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Nobuhito Saito
- Department of Neurosurgery, Faculty of Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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12
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Hosmann A, Hari S, Misra BK. Cystic recurrence of vestibular schwannoma post-radiosurgery: an institutional experience. Acta Neurochir (Wien) 2023; 165:4149-4156. [PMID: 38008799 DOI: 10.1007/s00701-023-05841-x] [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: 08/02/2023] [Accepted: 10/05/2023] [Indexed: 11/28/2023]
Abstract
BACKGROUND Stereotactic radiosurgery effectively controls vestibular schwannoma (VS). However, in certain cases, microsurgical resection may be necessary for post-radiosurgery tumour progression. The characteristics and microsurgical challenges of uncommon cystic recurrences post-radiosurgery are rarely addressed. METHOD We retrospectively analysed 24 consecutive patients who underwent microsurgical intervention for recurrent VS post-radiosurgery by the senior author. RESULTS Tumour recurrence post-radiosurgery occurred as solid growth in 19 patients (79%), while 5 patients (21%) developed large brainstem-compressing cysts. The median time interval for tumour recurrence post-radiosurgery was similar between cystic and non-cystic recurrent VS (30 vs. 25 months; p=0.08). Cystic recurrences occurred in primarily cystic VS in 3 patients, and new cysts developed in 2 patients with primarily solid VS. Intra-operatively, tumours were firm in 18 cases (75%) and strongly adhered to surrounding structures in 14 cases (58%). All cystic cases underwent cyst decompression, while complete resection of solid tumour components was avoided due to neurovascular adherence. At a mean follow-up of 42±39 months, 12 patients (50%) showed contrast-enhancing tumour residuals in follow-up imaging, including all cystic recurrent cases. Tumour residuals remained stable without requiring further intervention, except for one patient revealing malignant tumour transformation. House-Brackmann grade I/II was preserved in 15 patients (62%). Three patients (13%) developed new facial palsy, and two patients (8%) improved to House-Brackmann grade II. Cystic recurrences had a significantly higher frequency of tumour residuals compared to solid recurrences (100% vs. 37%; p=0.01) but similar rates of facial palsy (60% vs. 32%; p=0.24) CONCLUSIONS: Cyst development in VS post-radiosurgery is more common in primary cystic lesions but can also occur in rare cases of primary solid VS. Symptomatic cysts require microsurgical decompression. However, complete resection of the solid tumour component is not crucial for long-term tumour control and should be avoided if it risks neurological function in this delicate area.
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Affiliation(s)
- Arthur Hosmann
- Department of Neurosurgery & Gamma Knife Surgery, P D Hinduja National Hospital & Medical Research Centre, Veer Savarkar Marg, Mumbai, India
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Subhashree Hari
- Department of Neurosurgery & Gamma Knife Surgery, P D Hinduja National Hospital & Medical Research Centre, Veer Savarkar Marg, Mumbai, India
| | - Basant K Misra
- Department of Neurosurgery & Gamma Knife Surgery, P D Hinduja National Hospital & Medical Research Centre, Veer Savarkar Marg, Mumbai, India.
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13
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Park HR, Jeong SS, Kim JH, Myeong HS, Park HJ, Park KH, Park K, Yoon BW, Park S, Kim JW, Chung HT, Kim DG, Paek SH. Long-Term Outcome of Unilateral Acoustic Neuromas With or Without Hearing Loss: Over 10 Years and Beyond After Gamma Knife Radiosurgery. J Korean Med Sci 2023; 38:e332. [PMID: 37846791 PMCID: PMC10578997 DOI: 10.3346/jkms.2023.38.e332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/09/2023] [Indexed: 10/18/2023] Open
Abstract
BACKGROUND Since the long-term outcomes of 162 patients who underwent gamma knife radiosurgery (GKS) as an initial or adjuvant treatment for acoustic neuromas (ANs) with unilateral hearing loss were first reported in 1998, there has been no report of a comprehensive analysis of what has changed in GKS practice. METHODS We performed a retrospective study of the long-term outcomes of 106 patients with unilateral sporadic ANs who underwent GKS as an initial treatment. The mean patient age was 50 years, and the mean initial tumor volume was 3.68 cm3 (range, 0.10-23.30 cm3). The median marginal tumor dose was 12.5 Gy (range, 8.0-15.0 Gy) and the median follow-up duration was 153 months (range, 120-216 months). RESULTS The tumor volume increased in 11 patients (10.4%), remained stationary in 27 (25.5%), and decreased in 68 patients (64.2%). The actuarial 3, 5, 10, and 15-year tumor control rates were 95.3 ± 2.1%, 94.3 ± 2.2%, 87.7 ± 3.2%, and 86.6 ± 3.3%, respectively. The 10-year actuarial tumor control rate was significantly lower in the patients with tumor volumes of ≥ 8 cm3 (P = 0.010). The rate of maintaining the same Gardner-Robertson scale grade was 28.6%, and that of serviceable hearing was 46.4%. The rates of newly developed facial and trigeminal neuropathy were 2.8% and 4.7%, respectively. The patients who received marginal doses of less than 12 Gy revealed higher tumor control failure rates (P = 0.129) and newly occurred facial or trigeminal neuropathy rates (P = 0.040 and 0.313, respectively). CONCLUSION GKS as an initial treatment for ANs could be helpful in terms of tumor control, the preservation of serviceable hearing, and the prevention of cranial neuropathy. It is recommended to perform GKS as soon as possible not only for tumor control in unilateral ANs with hearing loss but also for hearing preservation in those without hearing loss.
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Affiliation(s)
- Hye Ran Park
- Department of Neurosurgery, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Sang Soon Jeong
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Jung Hoon Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Ho Sung Myeong
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Hyun Joo Park
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Kwang Hyon Park
- Department of Neurosurgery, Chungnam National University Hospital, Daejeon, Korea
| | - Kawngwoo Park
- Department of Neurosurgery, Gachon University Gil Medical Center, Incheon, Korea
| | - Byung Woo Yoon
- Department of Internal Medicine, School of Medicine, Chung-Ang University, Seoul, Korea
| | - Suyeon Park
- Department of Biostatistics, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jin Wook Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Hyun-Tai Chung
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Dong Gyu Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - Sun Ha Paek
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
- Clinical Research Institute, Seoul National University Hospital, Seoul, Korea
- Hypoxia/Ischemia Disease Institute, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Advanced Institutes of Convergence Technology, Suwon, Korea.
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Hsu PW, Lee CC, Huang YC, Wei KC, Chen HC, Wang CC, Yip PK, Liu ZH. Correlation between initial tumor enlargement and magnetic resonance imaging characteristics following linear accelerator-based stereotactic radiosurgery for acoustic neuromas. Strahlenther Onkol 2023; 199:718-726. [PMID: 36326857 DOI: 10.1007/s00066-022-02011-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 09/22/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Initial tumor enlargement (or pseudoprogression) instead of true tumor progression is a common phenomenon in patients with acoustic neuromas who are treated with stereotactic radiosurgery (SRS). This phenomenon can affect clinical decision-making and patient management. This study assessed the correlation between initial tumor enlargement and magnetic resonance imaging characteristics in patients with acoustic neuromas who were treated with linear accelerator (LINAC)-based SRS. The long-term tumor control outcomes were also analyzed. MATERIALS AND METHODS In total, 330 patients with sporadic acoustic neuromas who were treated with LINAC SRS between March 2006 and March 2020 were retrospectively evaluated to assess their initial tumor enlargement. The tumors were divided into homogeneously enhanced, heterogeneously enhanced, and cystic types based on the morphological characteristics noted on magnetic resonance images. Tumor control was assessed in 275 patients with a follow-up duration of more than 2 years. RESULTS Initial enlargement was observed in 137 of 330 (41.5%) tumors as early as 3 months after LINAC SRS. Data analysis revealed that postoperative tumors with a residual volume lower than 2.5 cm3 had a lower incidence of initial enlargement (p = 0.039). No correlation was noted between the initial enlargement and morphological characteristics of tumors. In patients with a mean follow-up duration of 82.8 ± 37.2 months, heterogeneously enhanced tumors exhibited a lower control rate than homogeneously enhanced and cystic tumors (p = 0.045). No correlation was noted between initial enlargement and tumor control. CONCLUSION Initial enlargement can occur as early as 3 months after SRS. Postoperative residual tumors with a volume lower than 2.5 cm3 exhibit a lower incidence of initial enlargement. Heterogeneously enhanced tumors have a lower local control rate.
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Affiliation(s)
- Peng-Wei Hsu
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University, No. 5, Fuxing St., Guishan Dist., Taoyuan City 333, Taiwan
| | - Cheng-Chi Lee
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University, No. 5, Fuxing St., Guishan Dist., Taoyuan City 333, Taiwan
| | - Yin-Cheng Huang
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University, No. 5, Fuxing St., Guishan Dist., Taoyuan City 333, Taiwan
| | - Kuo-Chen Wei
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University, No. 5, Fuxing St., Guishan Dist., Taoyuan City 333, Taiwan
| | - Hsien-Chih Chen
- Department of Neurosurgery, Chang Gung Memorial Hospital at Keelung, Chang Gung University, Keelung, Taiwan
| | - Chun-Chieh Wang
- Department of Radiation Oncology, Chang Gung Memorial Hospital at Linkou, Chang Gung University, Taoyuan, Taiwan
| | - Ping K Yip
- Barts and The London , School of Medicine and Dentistry, Blizard Institute, Queen Mary University of London, London, UK
| | - Zhuo-Hao Liu
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University, No. 5, Fuxing St., Guishan Dist., Taoyuan City 333, Taiwan.
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15
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Machetanz K, Lee L, Wang SS, Tatagiba M, Naros G. Trading mental and physical health in vestibular schwannoma treatment decision. Front Oncol 2023; 13:1152833. [PMID: 37434979 PMCID: PMC10332305 DOI: 10.3389/fonc.2023.1152833] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 06/08/2023] [Indexed: 07/13/2023] Open
Abstract
Objective Observation, radiotherapy and surgery are treatment options in vestibular schwannomas (VS). Decision making differs between centers and is usually based on tumor characteristics (e.g., size) and the expected physical health (PH) outcome (i.e., hearing and facial function). However, mental health (MH) is often under-reported. The objective of the present study was to ascertain the impact of VS treatment on PH and MH. Methods PH and MH were assessed in a prospective cross-sectional study including 226 patients with unilateral sporadic VS before and after surgical removal (SURG). Quality-of-life (QoL) was estimated by self-rating questionnaires: general Short-Form Health Survey (SF-36), Penn Acoustic Neuroma Quality-of-Life Scale (PANQOL), Dizziness Handicap Inventory (DHI), Hearing Handicap Inventory (HHI), Tinnitus Handicap Inventory (THI), and Facial Disability Index (FDI). QoL changes over time as well as predictive factors were accessed by multivariate analyses of covariance (MANCOVA). Results In total, 173 preoperative and 80 postoperative questionnaires were analyzed. There was a significant PH deterioration related to facial function (FDI, PANQOL-face) after surgery. In line with facial rehabilitation, however, FDI improved within the first five years after surgery and did not differ compared to the preoperative patient cohort, eventually. In contrast, MH (i.e., PANQOL-anxiety) and general health (i.e., PANQOL-GH) improved with surgery and correlated with the extent-of-resection. Conclusion Physical and mental health is significantly influenced by VS surgery. While PH might decrease after surgery, MH potentially increases when patient is cured. Practitioners should take MH into account before advising an incompletely VS treatment (e.g., subtotal resection, observation or radiosurgery).
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Affiliation(s)
- Kathrin Machetanz
- Neurosurgical Clinic, Department of Neurosurgery and Neurotechnology, Eberhard Karls University, Tuebingen, Germany
| | - Larissa Lee
- Neurosurgical Clinic, Department of Neurosurgery and Neurotechnology, Eberhard Karls University, Tuebingen, Germany
| | - Sophie S Wang
- Neurosurgical Clinic, Department of Neurosurgery and Neurotechnology, Eberhard Karls University, Tuebingen, Germany
| | - Marcos Tatagiba
- Neurosurgical Clinic, Department of Neurosurgery and Neurotechnology, Eberhard Karls University, Tuebingen, Germany
| | - Georgios Naros
- Neurosurgical Clinic, Department of Neurosurgery and Neurotechnology, Eberhard Karls University, Tuebingen, Germany
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16
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Balossier A, Tuleasca C, Delsanti C, Troude L, Thomassin JM, Roche PH, Régis J. Long-Term Hearing Outcome After Radiosurgery for Vestibular Schwannoma: A Systematic Review and Meta-Analysis. Neurosurgery 2023; 92:1130-1141. [PMID: 36735500 PMCID: PMC10150847 DOI: 10.1227/neu.0000000000002354] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 11/08/2023] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Stereotactic radiosurgery (SRS) is one of the main treatment options in the management of small to medium size vestibular schwannomas (VSs), because of high tumor control rate and low cranial nerves morbidity. Series reporting long-term hearing outcome (>3 years) are scarce. OBJECTIVE To perform a systematic review of the literature and meta-analysis, with the aim of focusing on long-term hearing preservation after SRS. METHODS Using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, we reviewed articles published between January 1990 and October 2020 and referenced in PubMed or Embase. Inclusion criteria were peer-reviewed clinical study or case series of VSs treated with SRS (single dose), reporting hearing outcome after SRS with a median or mean audiometric follow-up of at least 5 years. Hearing preservation, cranial nerves outcomes, and tumor control were evaluated. RESULTS Twenty-three studies were included. Hearing preservation was found in 59.4% of cases (median follow-up 6.7 years, 1409 patients). Main favorable prognostic factors were young age, good hearing status, early treatment after diagnosis, small tumor volume, low marginal irradiation dose, and maximal dose to the cochlea. Tumor control was achieved in 96.1%. Facial nerve deficit and trigeminal neuropathy were found in 1.3% and 3.2% of patients, respectively, both significantly higher in Linear Accelerator series than Gamma Knife series ( P < .05). CONCLUSION Long-term hearing preservation remains one of the main issues after SRS, with a major impact on health-related quality of life. Our meta-analysis suggests that hearing preservation can be achieved in almost 60% of patients after a median follow-up of 6.7 years, irrespective of the technique.
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Affiliation(s)
- Anne Balossier
- AP-HM, Timone Hospital, Functional and Stereotactic Neurosurgery, Marseille, France;
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France;
| | - Constantin Tuleasca
- Centre Hospitalier Universitaire Vaudois (CHUV), Neurosurgery Service and Gamma Knife Center, Lausanne, Switzerland;
- Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
- Signal Processing Laboratory (LTS 5), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland;
| | - Christine Delsanti
- AP-HM, Timone Hospital, Functional and Stereotactic Neurosurgery, Marseille, France;
| | - Lucas Troude
- AP-HM, North University Hospital, Department of Neurosurgery, Marseille, France;
| | - Jean-Marc Thomassin
- Department of Head and Neck Surgery, AP-HM, Timone Hospital, Marseille, France
| | - Pierre-Hugues Roche
- AP-HM, North University Hospital, Department of Neurosurgery, Marseille, France;
| | - Jean Régis
- AP-HM, Timone Hospital, Functional and Stereotactic Neurosurgery, Marseille, France;
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France;
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17
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Bossi Zanetti I, De Martin E, Pascuzzo R, D'Amico NC, Morlino S, Cane I, Aquino D, Alì M, Cellina M, Beltramo G, Fariselli L. Development of Predictive Models for the Response of Vestibular Schwannoma Treated with Cyberknife ®: A Feasibility Study Based on Radiomics and Machine Learning. J Pers Med 2023; 13:jpm13050808. [PMID: 37240978 DOI: 10.3390/jpm13050808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/03/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
PURPOSE to predict vestibular schwannoma (VS) response to radiosurgery by applying machine learning (ML) algorithms on radiomic features extracted from pre-treatment magnetic resonance (MR) images. METHODS patients with VS treated with radiosurgery in two Centers from 2004 to 2016 were retrospectively evaluated. Brain T1-weighted contrast-enhanced MR images were acquired before and at 24 and 36 months after treatment. Clinical and treatment data were collected contextually. Treatment responses were assessed considering the VS volume variation based on pre- and post-radiosurgery MR images at both time points. Tumors were semi-automatically segmented and radiomic features were extracted. Four ML algorithms (Random Forest, Support Vector Machine, Neural Network, and extreme Gradient Boosting) were trained and tested for treatment response (i.e., increased or non-increased tumor volume) using nested cross-validation. For training, feature selection was performed using the Least Absolute Shrinkage and Selection Operator, and the selected features were used as input to separately build the four ML classification algorithms. To overcome class imbalance during training, Synthetic Minority Oversampling Technique was used. Finally, trained models were tested on the corresponding held out set of patients to evaluate balanced accuracy, sensitivity, and specificity. RESULTS 108 patients treated with Cyberknife® were retrieved; an increased tumor volume was observed at 24 months in 12 patients, and at 36 months in another group of 12 patients. The Neural Network was the best predictive algorithm for response at 24 (balanced accuracy 73% ± 18%, specificity 85% ± 12%, sensitivity 60% ± 42%) and 36 months (balanced accuracy 65% ± 12%, specificity 83% ± 9%, sensitivity 47% ± 27%). CONCLUSIONS radiomics may predict VS response to radiosurgery avoiding long-term follow-up as well as unnecessary treatment.
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Affiliation(s)
- Isa Bossi Zanetti
- Department of Diagnostic Imaging and Stereotactic Radiosurgery, Centro Diagnostico Italiano S.p.A., Via Saint Bon 20, 20147 Milan, Italy
| | - Elena De Martin
- Health Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy
| | - Riccardo Pascuzzo
- Neuroradiology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy
| | - Natascha Claudia D'Amico
- Department of Diagnostic Imaging and Stereotactic Radiosurgery, Centro Diagnostico Italiano S.p.A., Via Saint Bon 20, 20147 Milan, Italy
| | - Sara Morlino
- Radiotherapy Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy
| | - Irene Cane
- Radiotherapy Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy
| | - Domenico Aquino
- Neuroradiology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy
| | - Marco Alì
- Department of Diagnostic Imaging and Stereotactic Radiosurgery, Centro Diagnostico Italiano S.p.A., Via Saint Bon 20, 20147 Milan, Italy
- Bracco Imaging S.p.A., Via Caduti di Marcinelle 13, Milan 20134, Italy
| | - Michaela Cellina
- Radiology Department, ASST Fatebenefratelli Sacco, Piazza Principessa Clotilde 3, Milan 2021, Italy
| | - Giancarlo Beltramo
- Department of Diagnostic Imaging and Stereotactic Radiosurgery, Centro Diagnostico Italiano S.p.A., Via Saint Bon 20, 20147 Milan, Italy
| | - Laura Fariselli
- Radiotherapy Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy
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18
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Pisani D, Gioacchini FM, Chiarella G, Astorina A, Ricciardiello F, Scarpa A, Re M, Viola P. Vestibular Impairment in Patients with Vestibular Schwannoma: A Journey through the Pitfalls of Current Literature. Audiol Res 2023; 13:285-303. [PMID: 37102775 PMCID: PMC10135541 DOI: 10.3390/audiolres13020025] [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: 02/27/2023] [Revised: 03/17/2023] [Accepted: 04/06/2023] [Indexed: 04/28/2023] Open
Abstract
Vestibular Schwannoma is the most common tumour of Ponto Cerebellar Angle and is capable of strongly impacting the patient's quality of life. In recent decades, the proposals for the management of the disease have multiplied, just as the diagnostic capacity has improved. While in the past, the primary objective was the preservation of the facial function, and subsequently also of the auditory function, the attention to the vestibular symptomatology, which appears to be one of the main indicators of deterioration of quality of life, is still unsatisfactory. Many authors have tried to provide guidance on the best possible management strategy, but a universally recognized guideline is still lacking. This article offers an overview of the disease and the proposals which have advanced in the last twenty years, evaluating their qualities and defects in a critical reading.
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Affiliation(s)
- Davide Pisani
- Unit of Audiology, Regional Centre of Cochlear Implants and ENT Diseases, Department of Experimental and Clinical Medicine, Magna Graecia University, 88100 Catanzaro, Italy
| | - Federico Maria Gioacchini
- Ear, Nose, and Throat Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Via Conca 71, 60020 Ancona, Italy
| | - Giuseppe Chiarella
- Unit of Audiology, Regional Centre of Cochlear Implants and ENT Diseases, Department of Experimental and Clinical Medicine, Magna Graecia University, 88100 Catanzaro, Italy
| | - Alessia Astorina
- Unit of Audiology, Regional Centre of Cochlear Implants and ENT Diseases, Department of Experimental and Clinical Medicine, Magna Graecia University, 88100 Catanzaro, Italy
| | | | - Alfonso Scarpa
- Department of Medicine and Surgery, University of Salerno, 84084 Salerno, Italy
| | - Massimo Re
- Ear, Nose, and Throat Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Via Conca 71, 60020 Ancona, Italy
| | - Pasquale Viola
- Unit of Audiology, Regional Centre of Cochlear Implants and ENT Diseases, Department of Experimental and Clinical Medicine, Magna Graecia University, 88100 Catanzaro, Italy
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19
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Chang HC, You WC, Shen CC, Chen YJ, Sun MH, Sheu ML, Pan LY, Sheehan J, Su KC, Pan HC. Using the deformity index of vital structures to predict outcome of patients with large vestibular schwannomas after Gamma Knife radiosurgery. J Neurooncol 2023; 162:179-189. [PMID: 36894719 DOI: 10.1007/s11060-023-04280-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 02/25/2023] [Indexed: 03/11/2023]
Abstract
PURPOSE Microsurgery is the mainstay of treatment for large vestibular schwannomas (VS), but the benefits of radiosurgery remain incompletely defined. Here, we aim to use automated volumetric analysis software to quantify the degree of brain stem deformity to predict long-term outcomes of patients with large VS following GKRS. METHODS Between 2003 and 2020, 39 patients with large VS (volume > 8 cc) undergoing GKRS with a margin dose of 10-12 Gy were analyzed. The reconstruction 3D MRI was used to evaluate the extent of deformity for predicting the long-term outcome of patients. RESULTS Their mean tumor volume was 13.7 ± 6.3 cc, and their mean follow-up after GKRS was 86.7 ± 65.3 months. Favorable clinical outcome was observed in 26 (66.7%) patients, while 13 (33.3%) patients had treatment failure. Patients with small tumor volumes, low vital structure deformity indice [(TV/(BSV + CerV) and (TV + EV)/(BSV + CerV)], and long distance of tumor to the central line were more likely to have favorable clinical outcome after GKRS. Significant prognostic value was with tumor shrinkage ratio (< 50%) were CV, CV/TV, TV/CerV, (TV + EV)/(BSV + CerV), and the distance of tumor to the central line. In cox regression, favorable clinical outcome was correlated with the Charlson comorbidity index and cochlear dosage (both p < 0.05). In multivariant analysis, tumor regression was highly correlated with the CV/TV ratio (p < 0.001). CONCLUSIONS The brainstem deformity ratio is likely a useful index to assess the clinical and tumor regression outcomes. Clinical outcomes are multifactorial and the tumor regression was highly correlated with the ratio of cystic components.
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Affiliation(s)
- Hao-Chun Chang
- Department of Medical Education, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Weir Chiang You
- Department of Radiation Oncology, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chiung-Chyi Shen
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Ying Ju Chen
- PhD program in Health and Social Welfare for Indigenous Peoples, Providence University, Taichung, Taiwan
| | - Ming-His Sun
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Meei-Ling Sheu
- Institute of Biomedical Sciences, National Chung-Hsing University, Taichung, Taiwan
| | - Liang-Yi Pan
- Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jason Sheehan
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Kuo-Chih Su
- Department of Medical Research, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4 Taichung, 40705, Taichung, Taiwan ROC
| | - Hung-Chuan Pan
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung, Taiwan. .,Department of Medical Research, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4 Taichung, 40705, Taichung, Taiwan ROC. .,Ph.D. program in Translational Medicine, Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan.
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20
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Aman RA, Petonengan DAA, Hafif M, Santoso F. Hearing Preservation, Facial Nerve Dysfunction, and Tumor Control in Small Vestibular Schwannoma: A Systematic Review of Gamma Knife Radiosurgery Versus Microsurgery. J Clin Neurol 2023; 19:304-311. [PMID: 36647227 PMCID: PMC10169925 DOI: 10.3988/jcn.2022.0116] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 08/16/2022] [Accepted: 08/16/2022] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND AND PURPOSE Vestibular schwannoma (VS) is the most common type of tumor found in the cerebellopontine angle that accounts for 8% of all intracranial tumors. VS management is currently a challenge due to the unpredictable nature of the tumor. Few studies have compared the results and complications of various therapeutic approaches to VS. Therefore, as a treatment option for VSs smaller than 25 mm, we conducted a systematic review to compare Gamma Knife radiosurgery (GKRS) with conventional surgery. METHODS Literature searches were conducted of four online databases (PubMed, Google Scholar, Cochrane, and ScienceDirect) using the following keyword search: ("vestibular schwannoma" OR "acoustic neuroma") AND ("gamma knife" OR "gamma knife radiosurgery") AND ("resection" OR "open surgery") AND ("hearing preservation" OR "facial nerve" OR "tumor growth"). RESULTS We identified six retrospective cohort studies, five of which were of fair-to-good quality. All studies showed that GKRS was superior to surgery in hearing preservation. Two studies indicated that surgery was superior to GKRS in maintaining tumor control, one indicated that GKRS was superior, and the remainder indicated that there was no significant difference in maintaining tumor control between GKRS and microsurgery. CONCLUSIONS Based on the three outcomes chosen for this review, GKRS was superior to microsurgery in small VS.
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Affiliation(s)
- Renindra Ananda Aman
- Department of Neurosurgery, Faculty of Medicine Universitas Indonesia, Dr. Cipto Mangunkusumo General National Hospital, Jakarta, Indonesia.
| | - Don Augusto Alexandro Petonengan
- Department of Neurosurgery, Faculty of Medicine Universitas Indonesia, Dr. Cipto Mangunkusumo General National Hospital, Jakarta, Indonesia
| | - Muhammad Hafif
- Department of Neurosurgery, Faculty of Medicine Universitas Indonesia, Dr. Cipto Mangunkusumo General National Hospital, Jakarta, Indonesia
| | - Fabianto Santoso
- Department of Neurosurgery, Faculty of Medicine Universitas Indonesia, Dr. Cipto Mangunkusumo General National Hospital, Jakarta, Indonesia
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21
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Hypofractionated stereotactic radiotherapy for large vestibular schwannomas and the impact of pre-radiation debulking surgery on dosimetry and clinical outcomes. JOURNAL OF RADIOTHERAPY IN PRACTICE 2023. [DOI: 10.1017/s1460396922000383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Abstract
Introduction:
This study was aimed to evaluate the outcomes of patients with large (>2 cm in great diameter) vestibular schwannomas (VSs) treated with hypofractionated stereotactic radiotherapy (HFSRT) compared to small (<2 cm) ones and the impact of debulking surgery prior to radiation for large VSs.
Methods:
Fifty-nine patients with VSs treated with HFSRT (25 Gy in 5 fractions) were evaluated by tumour size and surgical status. Patients were divided based on tumour size: small VSs (n = 42) and large VSs (n = 17). The large group was further divided into the groups of pre-treatment debulking surgery (n = 8) and no surgery (n = 9). Rates of tumour control, brainstem necrosis and neurologic dysfunction were assessed following treatment. Pre-surgical magnetic resonance imaging (MRI) were used to generate hypothetical HFSRT plans to compare the effect of debulking surgery on dosimetry. Normal tissue complication probability (NTCP) modelling was performed to compare toxicity probabilities with and without surgical debulking in large VSs.
Results:
There was no statistical difference of tumour control rate between small and large VSs with 100% for small tumours and 94·1% for large tumours (p = 0·12), respectively. In large VSs patient, the tumour control rate of HFSRT was 100% (8/8) for surgically debulked patients and 89% (8/9) for non-surgically debulked patients (p = 0·35). There were no patients who experienced brainstem necrosis or progression of facial and trigeminal nerve symptoms after HFSRT in the entire groups of patients. Surgical debulking large VSs did not change the maximum point dose of brainstem (p = 0·98), but significantly decreased volumes of VSs and changed the minimum dose to the hottest 0·5 cc of tumour (p = 0·016) as well as the volume receiving at least 23 Gy (p = 0·023). NTCP modelling revealed very low rates (average < 1%) of brainstem toxicity with or without surgical debulking, but there was a significant difference favoring surgery (p < 0·05).
Conclusions:
HFSRT is a safe and effective treatment for both small and large VSs and is a viable option for patients with large VSs who cannot undergo surgery, if NTCP of pre-debulking HFSRT dosimetry is lower.
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22
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Peker S, Samanci Y, Ozdemir IE, Kunst HPM, Eekers DBP, Temel Y. Long-term results of upfront, single-session Gamma Knife radiosurgery for large cystic vestibular schwannomas. Neurosurg Rev 2022; 46:2. [PMID: 36471101 DOI: 10.1007/s10143-022-01911-3] [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] [Accepted: 11/29/2022] [Indexed: 12/12/2022]
Abstract
Anecdotally, cystic vestibular schwannomas (cVSs) are regarded to have unpredictable biologic activity with poorer clinical results, and most studies showed a less favorable prognosis following surgery. While stereotactic radiosurgery (SRS) is a well-established therapeutic option for small- to medium-sized VSs, cVSs are often larger, thus making upfront SRS more complicated. The purpose of this retrospective study was to assess the efficacy and safety of upfront SRS for large cVSs. The authors reviewed the data of 54 patients who received upfront, single-session Gamma Knife radiosurgery (GKRS) with a diagnosis of large cVS (> 4 cm3). Patients with neurofibromatosis type 2, multiple VSs, or recurrent VSs and < 24 months of clinical and neuroimaging follow-up were excluded. Hearing loss (48.1%) was the primary presenting symptom. The majority of cVSs were Koos grade IV (66.7%), and the most prevalent cyst pattern was "mixed pattern of small and big cysts" (46.3%). The median time between diagnosis and GKRS was 12 months (range, 1-147 months). At GKRS, the median cVS volume was 6.95 cm3 (range, 4.1-22 cm3). The median marginal dose was 12 Gy (range, 10-12 Gy). The mean radiological and clinical follow-up periods were 62.2 ± 34.04 months (range, 24-169 months) and 94.9 ± 45.41 months (range, 24-175 months), respectively. At 2, 6, and 12 years, the tumor control rates were 100%, 95.7%, and 85.0%, respectively. Tumor shrinkage occurred in 92.6% of patients (n = 50), tumor volume remained stable in 5.6% of patients (n = 3), and tumor growth occurred in 1.9% of patients (n = 1). At a median follow-up of 53.5 months, the pre-GKRS tumor volume significantly decreased to 2.35 cm3 (p < 0.001). While Koos grade 3 patients had a greater possibility of attaining higher volume reduction, "multiple small thick-walled cyst pattern" and smaller tumor volumes decreased the likelihood of achieving higher volume reduction. Serviceable hearing (Gardner-Robertson Scale I-II) was present in 16.7% of patients prior to GKRS and it was preserved in all of these patients following GKRS. After GKRS, 1.9% of patients (n = 1) had new-onset trigeminal neuralgia. There was no new-onset facial palsy, hemifacial spasm, or hydrocephalus. Contrary to what was believed, our findings suggest that upfront GKRS seems to be a safe and effective treatment option for large cVSs.
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Affiliation(s)
- Selcuk Peker
- Department of Neurosurgery, School of Medicine, Koç University, Davutpasa Caddesi No. 4, 34010, Zeytinburnu, Istanbul, Turkey.
- Gamma Knife Center, Department of Neurosurgery, Koç University Hospital, Istanbul, Turkey.
- School for Mental Health and Neuroscience (MHeNS), Maastricht University Medical Center, Maastricht, The Netherlands.
| | - Yavuz Samanci
- Gamma Knife Center, Department of Neurosurgery, Koç University Hospital, Istanbul, Turkey
- Department of Neurosurgery, Koç University Hospital, Istanbul, Turkey
| | - Inan Erdem Ozdemir
- Gamma Knife Center, Department of Neurosurgery, Koç University Hospital, Istanbul, Turkey
| | - Henricus P M Kunst
- Department of Otorhinolaryngology, Maastricht University Medical Center, Maastricht, The Netherlands
- Department of Otorhinolaryngology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Dutch Academic Alliance Skull Base Pathology, Maastricht University Medical Center, Radboud University Medical Center, Maastricht/Nijmegen, The Netherlands
| | - Daniëlle B P Eekers
- Dutch Academic Alliance Skull Base Pathology, Maastricht University Medical Center, Radboud University Medical Center, Maastricht/Nijmegen, The Netherlands
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Yasin Temel
- School for Mental Health and Neuroscience (MHeNS), Maastricht University Medical Center, Maastricht, The Netherlands
- Dutch Academic Alliance Skull Base Pathology, Maastricht University Medical Center, Radboud University Medical Center, Maastricht/Nijmegen, The Netherlands
- Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
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23
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Smith H, Odeh A, Kallogjeri D, Piccirillo JF. Decision Making for Active Surveillance in Vestibular Schwannoma. OTOLOGY & NEUROTOLOGY OPEN 2022; 2:e022. [PMID: 38516575 PMCID: PMC10950155 DOI: 10.1097/ono.0000000000000022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 10/07/2022] [Indexed: 03/23/2024]
Abstract
Objective To describe the experiences of patients who elected for the active surveillance treatment option for their vestibular schwannoma (VS). Study Design Twenty-two patients participated in semistructured patient interviews. Setting Interviews were conducted between March and April 2021 via telephone with audio recordings and notes taken during each interview. Patients Adults diagnosed with a VS and at any point after their diagnosis underwent a period of active surveillance were recruited based on the diagnosis made by MRI. Patients were excluded if they chose to undergo treatment immediately, had a diagnosis of neurofibromatosis type 2, or if they had a confirmed alternative diagnosis. Intervention This intervention was a qualitative interview to assess patient experiences with their VS treatment decision. Main Outcome Measures Identifying abstract categories that represent many of the stories told by the participants that produces a theory grounded in the data with explanatory power. Results Factors that influenced patients' treatment decisions were perceived physician bias, selfeducation, and personal accounts of VS patients through support groups, and side effects/complications of the various treatment options. Conclusion Patients who opted for active surveillance as a treatment option reported high satisfaction with their decision and greater confidence in future treatments that would be necessary based on tumor growth. Future work should be done to increase shared decision making between the physician and patient to arrive at a treatment plan that aligns with their goals of care as well as potentially reducing overtreatment of VS.
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Affiliation(s)
- Harrison Smith
- Department of Otolaryngology-Head and Neck Surgery, Mount Sinai/New York Eye and Ear, New York, NY
| | - Ahmad Odeh
- Saint Louis University School of Medicine, St. Louis, Missouri
| | - Dorina Kallogjeri
- Department of Otolaryngology, Head and Neck Surgery, Washington University in St. Lous, Missouri
| | - Jay F. Piccirillo
- Department of Otolaryngology, Head and Neck Surgery, Washington University in St. Lous, Missouri
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24
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Berger A, Alzate JD, Bernstein K, Mullen R, McMenomey S, Jethanemest D, Friedmann DR, Smouha E, Sulman EP, Silverman JS, Roland JT, Golfinos JG, Kondziolka D. Modern Hearing Preservation Outcomes After Vestibular Schwannoma Stereotactic Radiosurgery. Neurosurgery 2022; 91:648-657. [PMID: 35973088 PMCID: PMC10553130 DOI: 10.1227/neu.0000000000002090] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/26/2022] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND For patients with vestibular schwannoma (VS), stereotactic radiosurgery (SRS) has proven effective in controlling tumor growth while hearing preservation remains a key goal. OBJECTIVE To evaluate hearing outcomes in the modern era of cochlear dose restriction. METHODS During the years 2013 to 2018, 353 patients underwent Gamma knife surgery for VS at our institution. We followed 175 patients with pre-SRS serviceable hearing (Gardner-Robertson Score, GR 1 and 2). Volumetric and dosimetry data were collected, including biological effective dose, integral doses of total and intracanalicular tumor components, and hearing outcomes. RESULTS The mean age was 56 years, 74 patients (42%) had a baseline GR of 2, and the mean cochlear dose was 3.5 Gy. The time to serviceable hearing loss (GR 3-4) was 38 months (95% CI 26-46), with 77% and 62% hearing preservation in the first and second years, respectively. Patients optimal for best hearing outcomes were younger than 58 years with a baseline GR of 1, free canal space ≥0.041 cc (diameter of 4.5 mm), and mean cochlear dose <3.1 Gy. For such patients, hearing preservation rates were 92% by 12 months and 81% by 2 years, staying stable for >5 years post-SRS, significantly higher than the rest of the population. CONCLUSION Hearing preservation after SRS for patients with VS with serviceable hearing is correlated to the specific baseline GR score (1 or 2), age, cochlear dose, and biological effective dose. Increased tumor-free canal space correlates with better outcomes. The most durable hearing preservation correlates with factors commonly associated with smaller tumors away from the cochlea.
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Affiliation(s)
- Assaf Berger
- Department of Neurological Surgery, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Juan Diego Alzate
- Department of Neurological Surgery, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Kenneth Bernstein
- Department of Radiation Oncology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Reed Mullen
- Department of Neurological Surgery, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Sean McMenomey
- Department of Otolaryngology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Daniel Jethanemest
- Department of Otolaryngology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - David R. Friedmann
- Department of Otolaryngology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Eric Smouha
- Department of Otolaryngology, Mount Sinai Beth Israel, The Mount Sinai Hospital, New York, New York, USA
| | - Erik P. Sulman
- Department of Radiation Oncology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Joshua S. Silverman
- Department of Radiation Oncology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - J. Thomas Roland
- Department of Otolaryngology, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - John G. Golfinos
- Department of Neurological Surgery, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
| | - Douglas Kondziolka
- Department of Neurological Surgery, NYU Langone Health, Grossman School of Medicine, New York University, New York, New York, USA
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Albano L, Deng H, Wei Z, Vodovotz L, Niranjan A, Lunsford LD. The longitudinal volumetric response of vestibular schwannomas after Gamma Knife radiosurgery. J Neurosurg 2022; 138:1273-1280. [PMID: 36087328 DOI: 10.3171/2022.7.jns22812] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 07/13/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Gamma Knife radiosurgery (GKRS) is an effective treatment for vestibular schwannomas (VSs) and has been used in > 100,000 cases worldwide. In the present study the authors sought to define the serial volumetric tumor response of Koos grade I-IV VS after radiosurgery. METHODS A total of 201 consecutive VS patients underwent GKRS at a single institution between 2015 and 2019. All patients had a minimum follow-up of 18 months and at least 2 interval postprocedure MRI scans. The contrast-enhanced tumor volumes were contoured manually and compared between pre- and post-GKRS imaging. The percentages of tumor volume change at 18 months (short-term follow-up) and up to 5 years after GKRS (long-term follow-up) were compared with the baseline tumor volume. An increase of 20% was considered a significant increase of tumor volume. Trends of tumor volume over time were assessed with linear models using time as a continuous variable. A test for linear trend was evaluated according to the initial Koos tumor classification. RESULTS Koos grade II VS was the most frequently occurring tumor (n = 74, 36.8%), followed by grade III (n = 57, 28.4%), grade I (n = 41, 20.4%), and grade IV (n = 29, 14.4%). The mean tumor volume at the time of GKRS was 2.12 ± 2.82 cm3 (range 0.12-18.77 cm3) and the median margin dose was 12 Gy. Short-term follow-up revealed that tumor volumes transiently increased in 34.2% and 28.4% of patients at 6 and 18 months, respectively, regardless of Koos grade. Linear regression analysis of Koos grade II, III, and IV tumors showed a significant longitudinal volume decrease on long-term follow-up. At last follow-up (median 30 months, range 18-54 months), 19 patients (9.4%) showed a persistent increase of tumor volume. Five patients received additional management after GKRS. CONCLUSIONS Although selected VS patients demonstrate an early and measurable transient volumetric increase after GKRS, > 90% have stable or reduced tumor volumes over an observed period of up to 5 years. Volumetric regression is most pronounced in Koos grade II, III, and IV tumors and may not be fully detectable until 3 years after GKRS.
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Affiliation(s)
- Luigi Albano
- 1Department of Neurological Surgery and.,2Center for Image-Guided Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Hansen Deng
- 1Department of Neurological Surgery and.,2Center for Image-Guided Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Zhishuo Wei
- 1Department of Neurological Surgery and.,2Center for Image-Guided Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Lena Vodovotz
- 1Department of Neurological Surgery and.,2Center for Image-Guided Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Ajay Niranjan
- 1Department of Neurological Surgery and.,2Center for Image-Guided Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - L Dade Lunsford
- 1Department of Neurological Surgery and.,2Center for Image-Guided Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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Abstract
OBJECTIVE This study aimed to assess the durability of audiological outcomes after radiation and surgery in the management of vestibular schwannoma. STUDY DESIGN Retrospective review. SETTING Tertiary academic center. PATIENTS Adults with sporadic vestibular schwannoma and serviceable hearing at the time of intervention. INTERVENTIONS Gamma Knife, middle cranial fossa, or retrosigmoid approaches. MAIN OUTCOME MEASURES Pure-tone audiometry and speech discrimination scores. RESULTS Postintervention serviceable hearing (class A/B) was preserved in 70.4% (n = 130; mean follow-up, 3.31 yr; range, 0-15.25 yr). Of the 49 patients treated with radiation, 19 (39.6%) had serviceable hearing at last follow-up, compared with 38 (46.9% of 81) who underwent retrosigmoid (n = 36 [44.4%]) and middle cranial fossa (n = 45 [55.6%]) approaches (odds ratio [OR], 1.40; 95% confidence interval [CI], 0.67-2.82; p = 0.47). A matched analysis by age, tumor volume, and preintervention hearing (n = 38) also found no difference in hearing preservation (HP) likelihood between surgery and radiation (OR, 2.33; 95% CI, 0.24-35.91; p = 0.59). After initial HP, 4 (9.5%) surgical versus 10 (37.0%) radiated patients subsequently lost residual serviceable (A/B) hearing (OR, 0.18; 95% CI, 0.06-0.69; p = 0.01) at a mean 3.74 ± 3.58 and 4.73 ± 3.83 years after surgery and radiation, respectively. Overall, 5- and 10-year HP rates (A/B) after initially successful HP surgery were 84.4 and 63.0%, respectively. However, survival estimates declined to 48.9% at 5 years and 32.7% at 10 years when patients with immediate postoperative serviceable hearing loss were also included, which were comparable to radiation-HP rates at 5 and 10 years of 28.0 and 14.2%, respectively ( p = 0.75). CONCLUSIONS After vestibular schwannoma intervention, overall HP was similar between radiated and surgical cohorts. However, when successful, surgical approaches offered more durable hearing outcomes at long-term follow-up.
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Early Translabyrinthine Surgery for Small- and Medium-Sized Vestibular Schwannomas: Consecutive Cohort Analysis of Outcomes. Otol Neurotol 2022; 43:962-967. [PMID: 35941713 DOI: 10.1097/mao.0000000000003608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Reappraisal of the role of translabyrinthine (TLAB) surgery in small- and medium-sized vestibular schwannomas (VSs). STUDY DESIGN Retrospective study. SETTING Tertiary referral center. PATIENTS A total of 330 consecutive patients diagnosed between 1973 and 2019 with small- and medium-sized VS up to 20 mm in the extrameatal portion submitted to surgical treatment. INTERVENTIONS VS removal through microscopic TLAB approach. MAIN OUTCOME MEASURES Facial nerve function according to the House-Brackmann scale at 12-month follow-up, postoperative complications and entity of tumor resection assessed with postoperative MRI. A comparative analysis of outcomes between two groups of patients was further conducted, according to tumor size: Group A, small-sized (intrameatal or ≤10 mm extrameatal tumors) and Group B, medium-sized VSs (extrameatal between 11 and 20 mm). RESULTS Complete tumor removal was achieved in all cases. The overall complication rate was 5.5%, being cerebrospinal fluid leak the most frequent. Patients with small-sized VS (n = 121) presented a significantly better facial nerve function than patients with medium-sized tumors (n = 209), showing House-Brackmann Grades I to II in 92.6% versus 73.6% of cases, respectively ( p < 0.001). A nearly 4.5-fold higher risk of poor facial nerve function at 12 months affects patients with medium-sized tumors (odds ratio, 4.473; 95% confidence interval, 2.122-9.430; p < 0.001). CONCLUSION In the current scenario of multioptional VS management, when hearing preservation is not feasible, early TLAB approach as first-line treatment for small-sized VSs showed favorable results. Factors supporting such proactive surgical treatment include long-term definitive cure, no major complications, good facial nerve outcomes, and the possibility of simultaneous hearing rehabilitation with a cochlear implant.
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The effect of cochlear dose on hearing preservation after low dose stereotactic radiosurgery for vestibular schwannomas: a systematic review. Adv Radiat Oncol 2022; 7:101059. [DOI: 10.1016/j.adro.2022.101059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 08/16/2022] [Indexed: 11/22/2022] Open
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Chew CH, Chen JC, Hung SK, Wu TH, Lee MS, Chiou WY, Chen LC, Lin HY. Clinical outcomes of benign brain tumors treated with single fraction LINAC-based stereotactic radiosurgery: Experience of a single institute. Tzu Chi Med J 2022; 34:462-472. [PMID: 36578643 PMCID: PMC9791860 DOI: 10.4103/tcmj.tcmj_260_21] [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: 09/16/2021] [Revised: 10/25/2021] [Accepted: 01/14/2022] [Indexed: 12/31/2022] Open
Abstract
Objectives Accelerator-based stereotactic radiosurgery (SRS) is a noninvasive and effective treatment modality widely used for benign brain tumors. This study aims to report 20-year treatment outcomes in our institute. Materials and Methods From May 2001 to December 2020, 127 patients treated with LINAC-based single-fraction SRS for their benign brain lesions were included. A neurosurgeon and two radiation oncologists retrospectively reviewed all data. Computed tomography (CT) simulation was performed after head-frame fixation under local anesthesia. All planning CT images were co-registered and fused with gadolinium-enhanced magnetic resonance imaging taken within 3 months for lesions targeting and critical organs delineation. The marginal dose was prescribed at 60%-90% isodose lines, respectively, to cover ≥95% planning target volume. Outcome evaluations included clinical tumor control rate (TCR), defined as the need for salvage therapy, and radiological response, defined as no enlargement of >2 cm in the maximal diameter. Overall survival (OS) and adverse reaction (defined according to CTCAE 5.0) were also analyzed. Results The present study included 76 female and 51 male patients for analysis. The median age was 59 years (range, 20-88 years). Their diagnoses were vestibular schwannoma (VS, n = 54), nonvestibular cranial nerve schwannoma (n = 6), meningioma (n = 50), and pituitary adenoma (n = 17). Totally 136 lesions were treated in a single fraction, predominantly skull base tumors, accounting for 69.1%. Median and mean follow-up duration was 49 and 61 months (range, 1-214 months), Overall TCR was 92.9%. The 5-year disease-specific TCR for VS, nonvestibular schwannoma, meningioma, and pituitary adenoma were 97.4%, 91.7%, 93.8%, and 83.3%. Salvage therapy was indicated for eight patients at 4-110 months after SRS. Among symptomatic patients, post-SRS symptom(s) was improved, stable, and worse in 68.2%, 24.3%, and 3.6%, respectively. Radiological response rate for 111 evaluable patients was 94.6% (shrinkage, 28.8%; stable, 65.8%). OS was 96.1% without treatment-related mortality. One patient with post-SRS cranial nerve injury (0.8%, involving the trigeminal nerve, grade 2 toxicities). No grade 3-4 acute or late toxicity was found. Conclusion Our results suggested that LINAC-based SRS effectively controls tumor growth and tumor-related neurological symptoms for patients with benign brain tumors. SRS is less aggressive, associated with low neurological morbidity and no mortality. Continuous follow-up is indicated to conclude longer outcomes.
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Affiliation(s)
- Chia-Hui Chew
- Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
| | - Jin-Cherng Chen
- Department of Neurosurgery, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
| | - Shih-Kai Hung
- Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Tsung-Hsien Wu
- Department of Neurosurgery, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
| | - Moon-Sing Lee
- Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Wen-Yen Chiou
- Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Liang-Cheng Chen
- Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Hon-Yi Lin
- Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan,Institute of Molecular Biology, National Chung Cheng University, Chiayi, Taiwan,Address for correspondence: Dr. Hon-Yi Lin, Department of Radiation Oncology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, 2, Min-Sheng Road, Dalin, Chiayi, Taiwan. E-mail:
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Yeole U, Prabhuraj AR, Arivazhagan A, Narasingarao KVL, Vazhayil V, Bhat D, Srinivas D, Govindswamy B, Sampath S. Gamma Knife Radiosurgery for Large Vestibular Schwannoma More Than 10 cm3: A Single-Center Indian Study. Skull Base Surg 2022; 83:e343-e352. [DOI: 10.1055/s-0041-1729977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 02/27/2021] [Indexed: 10/17/2022]
Abstract
Abstract
Introduction Gamma Knife radiosurgery (GKRS) is an effective treatment for benign vestibular schwannomas (VSs). The established cutoffs have recently been challenged, as recent literature expanded the horizon of GKRS to larger tumors. Even though microsurgery remains the primary option for large VS, GKRS can provide reasonable tumor control and is more likely to avoid cranial neuropathies associated with open surgery.
Methods We analyzed patients with VS with volume exceeding 10 cm3 who underwent GKRS at our center from January 2006 to December 2016. Clinicoradiological and radiosurgical data were collected from medical records for statistical analysis. Follow-up was performed every 6 months with a clinical assessment along with magnetic resonance imaging (MRI) of the brain and audiometric evaluation in patients with serviceable hearing.
Results The study included 34 patients (18 males and 16 females) with an average age of 45.5 years. The mean tumor volume was 10.9 cm3 (standard deviation [SD], ± 0.83), with a median tumor dose of 12 Gy (interquartile range, 11.5–12) and a mean follow-up of 34.7 months (SD, ± 23.8). Tumor response was graded as regression in 50%, stable in 44.1%, and increase or GKRS failure in 2 cases (5.8%). Treatment failure was noted in five cases (14.7%), requiring microsurgical excision and a ventriculoperitoneal shunt post-GKRS. The tumor control rate for the cohort is 85.3%, with a facial preservation rate of 96% (24/25) and hearing loss in all (5/5), while three patients developed new-onset hypoesthesia. We noted that gait ataxia and involvement of cranial nerve V or VII at initial presentation were associated with GKRS failure in univariate analysis.
Conclusion Microsurgery should remain the first-choice treatment option for large VSs. GKRS is a viable alternative with good tumor control and improved or stabilized cranial neuropathies with a low complication rate.
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Affiliation(s)
- Ujwal Yeole
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - A. R. Prabhuraj
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Arimappamagan Arivazhagan
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - K. V. L. Narasingarao
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Vikas Vazhayil
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Dhananjaya Bhat
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Dwarakanath Srinivas
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Bhanumathi Govindswamy
- Division of Radiation Oncology, Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Somanna Sampath
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Treatment for vestibular schwannoma: Systematic review and single arm meta-analysis. Am J Otolaryngol 2022; 43:103337. [PMID: 34973662 DOI: 10.1016/j.amjoto.2021.103337] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 11/13/2021] [Accepted: 12/09/2021] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Vestibular schwannoma is a benign tumor in the schwannoma cells of the 8th cranial nerve. It causes symptoms like tinnitus, vertigo and end up with loss of hearing so the appropriate treatment is very important. There are many treatment techniques including conservative, surgery and radiosurgery. We aimed to systematically review and single arm meta-analysis the different treatment techniques of vestibular schwannoma. METHODS A comprehensive literature search using thirteen databases including PubMed, Scopus, and Web of Science was performed. All clinical trials about treatment vestibular schwannoma were included and single arm meta-analyzed. We assessed the risk of bias using ROBIN-I's tool and scale of Council Australia's Cancer Guidelines Wiki. The protocol was registered in PROSPERO (CRD42018089784) and has been updated on 17 April 2019. RESULTS A total of 35 clinical trials studies were included in the final analysis. The pooled proportion of stable hearing capability in patients receiving gamma knife radiosurgery (GKRS) was 64% (95% CI: 52%-74%). GKRS favored increased hearing capability 10% (95% CI: 7%-16%). Regarding tumor size, GKRS is the most protective method 53% (95% CI: 37%-69%). Complications occurred most commonly in single fractional linac stereotactic radiosurgery (SFSRT) 37% (95% CI: 12%-72%). CONCLUSION Our analysis suggested gamma knife radiosurgery could be the most ideal treatment for vestibular schwannoma based on stabilizing hearing capability, increasing hearing capability, decreasing tumor size and complications.
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Conlan O, Kontorinis G. Long-term growth patterns of vestibular schwannomas after stereotactic radiotherapy: delayed re-growth. Eur Arch Otorhinolaryngol 2022; 279:4825-4830. [PMID: 35129632 PMCID: PMC9474560 DOI: 10.1007/s00405-022-07281-2] [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: 09/28/2021] [Accepted: 01/21/2022] [Indexed: 11/26/2022]
Abstract
Purpose To determine the long-term outcomes of patients with vestibular schwannomas (VS) after stereotactic radiosurgery (SRS) who experience delayed tumour regrowth. Methods We carried out a retrospective case series in tertiary university settings. We included patients with VS with initial response to SRS and delayed regrowth, assessing a database of 735 patients with VS and 159 patients who had SRS as sole treatment. Following SRS, all patients had clinical follow-up and serial magnetic resonance imaging (MRI). We documented the post-SRS clinical assessment, pre- and post-SRS VS size as per MRI in predetermined time periods, response to treatment and rate of (re-) growth and the final outcome in each case. Results We identified six patients with good initial response but delayed VS regrowth at a faster rate than pre-SRS. The mean growth rate for these VS was 0.347 mm/month (range 0.04–0.78 mm/month) prior to treatment; the mean growth rate at the time of delayed re-growth was 0.48 mm/month (range 0.17–0.75 mm/month); this did not reach the level of statistical significance (p = 0.08). This regrowth occurred at a mean time of 42 months (range 36–66 months) post-SRS and stopped 22 months (mean, range 12–36 months) post regrowth detection in all cases. Conclusions Given that delayed post-SRS VS regrowth can occur in approximately 4% of the treated cases, it is important to continue close clinical and radiological follow-up. Despite this abnormal behaviour, VS do stop growing again; still, patients should be made aware of the possibility of this uncommon VS behaviour following SRS.
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Affiliation(s)
- Owen Conlan
- School of Medicine, University of Glasgow, Glasgow, UK
| | - Georgios Kontorinis
- School of Medicine, University of Glasgow, Glasgow, UK.
- Department of Otolaryngology-Head and Neck Surgery, Queen Elizabeth University Hospital, 1345 Govan Road, Glasgow, G51 4TF, UK.
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Hwang I, Choi SH, Kim JW, Yeon EK, Lee JY, Yoo RE, Kang KM, Yun TJ, Kim JH, Sohn CH. Response prediction of vestibular schwannoma after gamma-knife radiosurgery using pretreatment dynamic contrast-enhanced MRI: a prospective study. Eur Radiol 2022; 32:3734-3743. [PMID: 35084518 DOI: 10.1007/s00330-021-08517-1] [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: 06/07/2021] [Revised: 11/09/2021] [Accepted: 12/10/2021] [Indexed: 11/04/2022]
Abstract
OBJECTIVES There are few known predictive factors for response to gamma-knife radiosurgery (GKRS) in vestibular schwannoma (VS). We investigated the predictive role of pretreatment dynamic contrast-enhanced (DCE)-MRI parameters regarding the tumor response after GKRS in sporadic VS. METHODS This single-center prospective study enrolled participants between April 2017 and February 2019. We performed a volumetric measurement of DCE-MRI-derived parameters before GKRS. The tumor volume was measured in a follow-up MRI. The pharmacokinetic parameters were compared between responders and nonresponders according to 20% or more tumor volume reduction. Stepwise multivariable logistic regression analyses were performed, and the diagnostic performance of DCE-MRI parameters for the prediction of tumor response was evaluated by receiver operating characteristic curve analysis. RESULTS Ultimately, 35 participants (21 women, 52 ± 12 years) were included. There were 22 (62.9%) responders with a mean follow-up interval of 30.2 ± 5.7 months. Ktrans (0.036 min-1 vs. 0.057 min-1, p = .008) and initial area under the time-concentration curve within 90 s (IAUC90) (84.4 vs. 143.6, p = .003) showed significant differences between responders and nonresponders. Ktrans (OR = 0.96, p = .021) and IAUC90 (OR = 0.97, p = .004) were significant differentiating variables in each multivariable model with clinical variables for tumor response prediction. Ktrans showed a sensitivity of 81.8% and a specificity of 69.2%, and IAUC90 showed a sensitivity of 100% and a specificity of 53.8% for tumor response prediction. CONCLUSION DCE-MRI (particularly Ktrans and IAUC90) has the potential to be a predictive factor for tumor response in VS after GKRS. KEY POINTS •Pretreatment prediction of gamma-knife radiosurgery response in vestibular schwannoma is still challenging. •Dynamic contrast-enhanced MRI could have predictive value for the response of vestibular schwannoma after gamma-knife radiosurgery.
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Affiliation(s)
- Inpyeong Hwang
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Seung Hong Choi
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea. .,Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea. .,Institute of Radiation Medicine, Seoul National University Medical Research Center, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea. .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea.
| | - Jin Wook Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Eung Koo Yeon
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Ji Ye Lee
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Roh-Eul Yoo
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea.,Institute of Radiation Medicine, Seoul National University Medical Research Center, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Koung Mi Kang
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Tae Jin Yun
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ji-Hoon Kim
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Chul-Ho Sohn
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea.,Institute of Radiation Medicine, Seoul National University Medical Research Center, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
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34
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Ganz JC. Vestibular Schwannomas. PROGRESS IN BRAIN RESEARCH 2022; 268:133-162. [PMID: 35074078 DOI: 10.1016/bs.pbr.2021.10.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Vestibular Schwannomas are well treated by GKNS. This can be used alone for tumors up to 20cm3. For larger tumors subtotal, intracapsular resection followed by GKNS a few months later would seem to give the best results. While there remain disagreements relating to optimal treatment for VSs among colleagues using different techniques, there are indications that these are becoming less confrontational. The evidence in this chapter suggests that early GKNS intervention results in better hearing preservation and tumor control in small tumors. The evidence in favor of "wait and see" depends on series reporting on changes in tumor size using suboptimal measurements. It is more important to record the fate of hearing, and this would seem to be better preserved following early GKNS. The results of GKNS for NF2 are by no means as good as could be wished but would seem to be superior to those of microsurgery. The importance of screening of family members cannot be over emphasized.
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Affiliation(s)
- Jeremy C Ganz
- Department of Neurosurgery, Haukeland University Hospital, Bergen, Norway.
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Matsushima K, Kohno M, Ichimasu N, Nakajima N, Yoshino M. Preoperative Facial Nerve Palsy in Patients With Vestibular Schwannoma: Clinical Features and Postoperative Functional Prognosis in a Case Series of 34 Among 1228 Consecutive Patients. Oper Neurosurg (Hagerstown) 2022; 22:14-19. [PMID: 34982900 DOI: 10.1227/ons.0000000000000011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/24/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Facial nerve palsy is a rare presenting symptom of vestibular schwannomas and has not been investigated in detail. OBJECTIVE To investigate the incidence, clinical features, and postoperative long-term outcomes of facial nerve function in patients with vestibular schwannomas causing preoperative facial nerve palsy. METHODS After excluding patients with neurofibromatosis type 2 and those with prior treatment, 1228 consecutive patients who underwent vestibular schwannoma surgery were retrospectively investigated. Patients with and without preoperative facial nerve palsy were compared statistically to clarify their clinical features. RESULTS Preoperative tumoral facial nerve palsy was seen in 34 patients (2.8%). Their clinical features included older age, having large cystic tumors with significant meatal extension, and showing abnormal electrogustometric responses, compared with patients without preoperative facial nerve palsy. Owing to the frequent insufficient intraoperative responses on facial nerve electromyography, the tumor resection rate was lower in the group with preoperative facial nerve palsy (mean: 95.2%). Among the 33 patients with sufficient follow-up data (mean: 63.9 mo), additional treatment was required only in 1 patient and facial nerve function improved in 25 patients (75.8%) within 2 yr postoperatively. CONCLUSION Facial nerve palsy is a rare preoperative symptom that occurs in less than 3% of patients with vestibular schwannoma. Tumor resection in such patients tends to be challenging owing to their advanced age, having large cystic tumors with significant meatal extension, and difficulties in intraoperative facial nerve monitoring, but surgical decompression of the facial nerve can assist in the improvement of their long-term functions.
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Affiliation(s)
- Ken Matsushima
- Department of Neurosurgery, Tokyo Medical University, Tokyo, Japan
| | - Michihiro Kohno
- Department of Neurosurgery, Tokyo Medical University, Tokyo, Japan.,Department of Neurosurgery, Tokyo Metropolitan Police Hospital, Tokyo, Japan
| | - Norio Ichimasu
- Department of Neurosurgery, Tokyo Medical University, Tokyo, Japan
| | | | - Masanori Yoshino
- Department of Neurosurgery, Tokyo Metropolitan Police Hospital, Tokyo, Japan
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Kieu HD, Vuong DN, Mai KT, Pham PC, Le TD. Long-term outcomes of rotating gamma knife for vestibular schwannoma: A 4-year prospective longitudinal study of 89 consecutive patients in Vietnam. Surg Neurol Int 2021; 12:585. [PMID: 34992902 PMCID: PMC8720424 DOI: 10.25259/sni_687_2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 11/10/2021] [Indexed: 11/17/2022] Open
Abstract
Background: Microsurgical total removal of vestibular schwannoma (VS) is the definitive treatment but has a high incidence of postoperative neurological deficits. Rotating Gamma Knife (RGK) is a preferred option for a small tumor. This study aims to evaluate long-term neurological outcomes of RGK for VS. Methods: This prospective longitudinal study was conducted at the Nuclear Medicine and Oncology Center, Bach Mai Hospital, Hanoi, Vietnam. Eighty-nine consecutive patients were enrolled from October 2011 to October 2015 and followed up to June 2017. RGK was indicated for VS measuring <2.2 cm, while RGK for tumors measuring 2.2–3 cm was considered in patients with severe comorbidities, high-risk surgery, and who denied surgery. Concurrently, VS consisted of newly diagnosed, postoperative residual, and recurrent tumors. Patients with neurofibromatosis type 2 were excluded from the study. Primary outcomes were radiological tumor control rate, vestibulocochlear functions, facial and trigeminal nerve preservation. Stereotactic radiosurgery was performed by the Rotating Gamma System Gamma ART 6000. Results: The tumors were measured 20.7 ± 5.6 mm at pre treatment and 17.6 ± 4.1 mm at 3-year post treatment. The mean radiation dose was 13.5 ± 0.9 Gy. Mean follow-up was 40.6 ± 13.3 months. The radiological tumor control rate was achieved 95.5% at 5-year post treatment. The hearing and vestibular functions were preserved in 70.3% and 68.9%, respectively. The facial and trigeminal nerve preservation rates were 94.4% and 73.3%, respectively. Conclusion: RGK is an effective and safe treatment for VS measuring ≤3 cm with no significant complications during long-term follow-up.
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Affiliation(s)
- Hung Dinh Kieu
- Department of Neurosurgery and Spine Surgery, Hanoi Medical University Hospital, Hanoi, Vietnam
| | - Duong Ngoc Vuong
- The Nuclear Medicine and Oncology Center, Bach Mai Hospital, Hanoi, Vietnam
| | - Khoa Trong Mai
- The Nuclear Medicine and Oncology Center, Bach Mai Hospital, Hanoi, Vietnam
| | - Phuong Cam Pham
- The Nuclear Medicine and Oncology Center, Bach Mai Hospital, Hanoi, Vietnam
| | - Tam Duc Le
- Department of Neurosurgery and Spine Surgery, Hanoi Medical University Hospital, Hanoi, Vietnam
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Landry AP, Yang K, Wang JZ, Gao AF, Zadeh G. Outcomes in vestibular schwannoma treated with primary microsurgery: Clinical landscape. J Clin Neurosci 2021; 96:138-146. [PMID: 34802892 DOI: 10.1016/j.jocn.2021.11.004] [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: 09/18/2021] [Revised: 10/30/2021] [Accepted: 11/04/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND Vestibular schwannoma (VS) is the most common tumour of the cerebellopontine angle. Owing to complex anatomy and high rates of morbidity, surgical management of large tumours is challenging. We seek to explore the clinical landscape of VS to identify predictors of outcome and help guide surgical decision making. METHODS We retrospectively reviewed charts of patients who underwent primary surgery for VS between 2005 and 2020 at a quaternary referral center in Toronto, Canada. Mined data includes patient demographics, clinical presentation, radiological features, and treatment details. Regression modelling was used to identify predictors of tumour control, postoperative morbidity, and correlates of progression free survival (PFS). RESULTS Two hundred and five tumours with sufficient data were included in our study. Syndromic NF2, large tumours (>3cm), subtotal resection (vs gross total resection), presence of edema on preoperative MRI, and preoperative trigeminal symptoms were all predictors of postoperative progression/need for further treatment; the latter four were also associated with shorter progression free survival. Extent of resection (EOR), tumour size, and Koos grade were independently predictive of postoperative progression/secondary intervention in multivariate models; however, only EOR was independently predictive of progression-free survival. EOR, tumour size, and patient age are each independently predictive of facial nerve outcome. CONCLUSIONS We comprehensively explore the clinical landscape of surgically treated vestibular schwannoma and highlight important outcome predictors and disease subgroups. This may have important implications in risk stratifying these challenging cases.
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Affiliation(s)
- Alexander P Landry
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada.
| | - Kaiyun Yang
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Justin Z Wang
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Andrew F Gao
- Division of Neuropathology, Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Gelareh Zadeh
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
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38
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Tumor Control Following Stereotactic Radiosurgery in Patients with Vestibular Schwannomas - A Retrospective Cohort Study. Otol Neurotol 2021; 42:e1548-e1559. [PMID: 34353978 DOI: 10.1097/mao.0000000000003285] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND To better counsel vestibular schwannoma patients, it is necessary to understand the tumor control rates of stereotactic radiosurgery (SRS). OBJECTIVES To determine tumor control rates, factors determining control and complication rates following SRS. METHODS Tertiary hospital retrospective cohort. RESULTS 579 tumors (576 patients) were treated with SRS. 477 tumors (474 patients, 82%) had ≥1 year follow up and 60% (344) ≥3 years follow up. 88% of tumors had primary SRS and 6.7% salvage SRS. Median follow up time was 4.6 years. At 3 years, the tumor control rate of primary SRS was 89% (258 of 290) in sporadic tumors compared to 43% in Neurofibromatosis type II (3 of 17) (p < 0.01). Our bivariable survival data analysis showed that Neurofibromatosis type II, documented pre-SRS growth, tumor measured by maximum dimension, SRS given as nonprimary treatment increased hazard of failure to control. There was one case of malignancy and another of rapid change following intra-tumoral hemorrhage. For tumors undergoing surgical salvage (25 of 59), 56% had a total or near-total resection, 16% had postoperative CSF leak, with 12% new facial paralysis (House-Brackmann grade VI) and worsening of facial nerve outcomes (House-Brackmann grade worse in 59% at 12 mo). CONCLUSIONS Control of vestibular schwannoma after primary SRS occurs in the large majority. Salvage surgical treatment was notable for higher rates of postoperative complications compared to primary surgery reported in the literature.
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Puataweepong P, Dhanachai M, Swangsilpa T, Sitathanee C, Ruangkanchanasetr R, Hansasuta A, Pairat K. Long-term clinical outcomes of stereotactic radiosurgery and hypofractionated stereotactic radiotherapy using the CyberKnife ® robotic radiosurgery system for vestibular schwannoma. Asia Pac J Clin Oncol 2021; 18:e247-e254. [PMID: 34310064 DOI: 10.1111/ajco.13592] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 03/04/2021] [Indexed: 11/30/2022]
Abstract
AIM The study aimed to evaluate the long-term clinical outcomes of patients with vestibular schwannoma (VS) treated with stereotactic radiosurgery (SRS) and hypofractionated stereotactic radiotherapy (HSRT) with frameless robotic whole-body radiosurgery system (CyberKnife® ). METHODS This retrospective analysis of prospectively collected data included 123 consecutive patients with VS treated at the Radiosurgery center, Ramathibodi Hospital, Bangkok, Thailand. SRS was recommended for patients with unserviceable hearing and Koos grade I-III tumors, and HSRT for patients with serviceable hearing or Koos grade III-IV tumors. Between March 2009 and December 2015, 23 patients (19%) were treated with SRS, whereas 100 (81%) received HSRT. The commonly used regimen was 12 Gy in one fraction for SRS and 18 Gy in three fractions for HSRT. RESULTS After a median follow-up of 72 months (range: 12-123 months), the 5-year and 8-year progression-free survival (PFS) rates for the whole cohort were 96% and 92%, respectively. The PFS was not significantly different between the SRS and HSRT groups (p = 0.23). Among 28 patients with serviceable hearing in the HSRT group, the 5-year and 8-year hearing preservation rates were 87% and 65%, respectively. The rate of nonauditory complications was 14%. Koos grade III/IV was a predictor of disease progression and was associated with nonauditory complications. CONCLUSION SRS and HSRT with the CyberKnife® system provided excellent long-term tumor control with a low rate of nonauditory complications. HSRT may result in acceptable hearing preservation rates.
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Affiliation(s)
- Putipun Puataweepong
- Radiation and Oncology Unit, Department of Radiology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Mantana Dhanachai
- Radiation and Oncology Unit, Department of Radiology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Thiti Swangsilpa
- Radiation and Oncology Unit, Department of Radiology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Chomporn Sitathanee
- Radiation and Oncology Unit, Department of Radiology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Rawee Ruangkanchanasetr
- Radiation and Oncology Unit, Department of Radiology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Ake Hansasuta
- Department of Surgery, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Kumuthinee Pairat
- Radiosurgery Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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40
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Kawashima M, Hasegawa H, Shin M, Shinya Y, Katano A, Saito N. Outcomes of stereotactic radiosurgery in young adults with vestibular schwannomas. J Neurooncol 2021; 154:93-100. [PMID: 34241770 DOI: 10.1007/s11060-021-03803-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/01/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE Vestibular schwannomas (VSs) are comparatively rare in younger patients, and stereotactic radiosurgery (SRS) outcome data are limited. We aimed to evaluate long-term SRS outcomes concerning sporadic VSs in patients aged ≤ 40 years. METHODS Of 383 patients with VS who had undergone SRS at our institution between 1990 and 2017, we retrospectively compared younger and older patients' tumor control and radiation-induced complication rates using case-control propensity score (PS) matching. RESULTS The mean follow-up was 83 and 92 months in older and younger patients, respectively. Compared with older patients, younger patients were more likely to have a history of resection (20% vs. 39%, p = 0.006) and be treated with higher marginal doses (median, 12 Gy vs. 14 Gy; p = 0.014). Cumulative 5- and 10-year tumor control rates were higher in older patients (97.7% and 93.9%, respectively) than in younger patients (90.2% and 85.4%, respectively, p = 0.024). After PS matching, younger patients' cumulative tumor control rates (93.6%, 85.4%, and 85.4% at 5, 10, and 15 years, respectively) were similar to those of older patients (p = 0.411). No significant between-cohort differences in hearing preservation rates or other cranial nerve complications were observed. Two younger patients had malignant tumors several years post-SRS, with one patient having confirmed histological transformation. CONCLUSIONS SRS is equally effective for younger and older patients. Complications other than hearing deterioration are uncommon. However, malignant transformation is possible, and long-term post-SRS surveillance MRI is important. These data are useful for decision-making involving young adults with VSs.
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Affiliation(s)
- Mariko Kawashima
- Department of Neurosurgery, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Hirotaka Hasegawa
- Department of Neurosurgery, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Masahiro Shin
- Department of Neurosurgery, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yuki Shinya
- Department of Neurosurgery, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Atsuto Katano
- Department of Radiology, The University of Tokyo Hospital, Tokyo, Japan
| | - Nobuhito Saito
- Department of Neurosurgery, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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41
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Cesme DH, Alkan A, Sari L, Kaya A, Yurtsever I, Alkan G, Seyithanoglu MH, Hatiboglu MA. The Effectiveness of Diffusion Tensor Imaging in Determining Radiological Response after Radiosurgery in Patients with Vestibular Schwannoma. Curr Med Imaging 2021; 17:602-607. [PMID: 33504315 DOI: 10.2174/1573405617666210127160848] [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: 06/24/2020] [Revised: 11/09/2020] [Accepted: 11/27/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND The effectiveness of Diffusion Tensor Imaging (DTI) in demonstrating functional changes in the tumor in determining the response to treatment after radiosurgery in patients with vestibular schwannoma (VS) is not clear yet. OBJECTIVE The study aimed to determine the change in total tumor volume (TTV) in terms of radiological response in patients who had VS and were treated with radiosurgery and investigated the relationship between the TTV, follow-up times and DTI parameters. METHODS Thirty-one patients were assessed using DTI and MRI. TTV, apparent diffusion coefficient (ADC), and fractional anisotropy (FA) were calculated. Patients were divided into three groups: those who responded to the treatment (group 1) (n=11), those who did not (group 0) (n=9) and those who remained stable (group 2) (n=11). RESULTS The mean duration of follow-up was 28.81±14 months. ADC values increased in patients with VS after radiosurgery (p=0.004). There was no statistical difference in the FA values. A significant reduction in TTV after radiosurgery was detected in group 1 (p=0.003). ADC values increased significantly after radiosurgery in group 2 (p=0.04). Although there were no significant differences, ADC values after radiosurgery increased in group 1 and group 0. CONCLUSIONS ADC values continuously increase due to radiation damage in the period before the tumor volume shrinks after radiosurgery. We think that it is not appropriate to diagnose inadequate treatment or progression only when TTV is evaluated in terms of response to treatment in the early period after radiosurgery.
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Affiliation(s)
- Dilek Hacer Cesme
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Alpay Alkan
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Lutfullah Sari
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Ahmet Kaya
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Ismail Yurtsever
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Gokberk Alkan
- Department of Otorhinolaryngology Abdurrahman Yurtaslan Oncology Training and Research Hospital, Ankara, Turkey
| | | | - Mustafa Aziz Hatiboglu
- Department of Neurosurgery, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
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42
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Stereotactic Radiosurgery for Vestibular Schwannoma Outcomes in Patients With Perfect Word Recognition-A Retrospective Cohort Study. Otol Neurotol 2021; 42:755-764. [PMID: 33443977 DOI: 10.1097/mao.0000000000003039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To investigate tumor control rate and hearing outcomes following stereotactic radiosurgery (SRS) for vestibular schwannoma (VS) cases with perfect (100%) word recognition score (WRS). STUDY DESIGN A retrospective cohort study. SETTING Tertiary referral center. PATIENTS Inclusion criteria were receiving primary SRS, a pretreatment WRS of 100%, and availability of both pre- and posttreatment audiometric data for evaluation. INTERVENTION SRS delivered by Cyberknife. MAIN OUTCOME MEASURES Tumor growth rates and audiological outcomes after SRS. RESULTS The cohort consisted of 139 patients, with more than 1-year follow-up (mean 6.1 yrs). SRS tumor control rate was 87% for the whole cohort. Growth before SRS was documented in 24% (n = 34 of 139). The proportion of sporadic VS cases who maintained hearing (decline <10 dB of pure-tone audiometry or <20% of WRS) at 3 years was 50%, at 5 years was 45%, and at 10 years was 42%. In multivariate analysis, increased age was found to be predictive of increased hearing loss (p = 0.03), while the following factors were shown not to be significant: sex (p = 0.5), tumor size (p = 0.2), pre-SRS tumor growth (p = 0.5), and target volume (p = 0.42). CONCLUSIONS Among patients with VS who had perfect WRS and underwent SRS, the overall tumor control rate was 87% comparable to observation. Hearing maintenance and preservation of "serviceable" hearing rates after 5 years in VS patients with perfect WRS treated by SRS is less than that when comparing to similar observation cohorts. Given this finding we do not advocate using SRS to preserve hearing, over observation, in tumors with perfect WRS.
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Reznitsky M, Petersen MMBS, West N, Stangerup SE, Cayé-Thomasen P. The natural history of vestibular schwannoma growth-prospective 40-year data from an unselected national cohort. Neuro Oncol 2021; 23:827-836. [PMID: 33068429 DOI: 10.1093/neuonc/noaa230] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Optimal management of vestibular schwannoma (VS) is still debated and thus international consensus has not been achieved. Treatment options are observation, radiotherapy, and surgery. Knowledge on the natural history of tumor growth is essential for choice of treatment modality. The aim is to present intra-/extrameatal tumor growth and management data from a prospective, unselected national cohort of patients diagnosed with VS during the period 1976-2015. METHODS Since 1976, all data from patients diagnosed with sporadic VS in Denmark have been referred to our national treatment center, where they have been entered prospectively into the national database. Data on tumor localization, growth, and treatment were retrieved. Growth definition: >2 mm by linear measurement, in accordance with the Tokyo 2001 consensus-meeting recommendations. RESULTS 3637 cases of VS were diagnosed, in which 1304 patients had surgery and 21 received radiotherapy post diagnosis. 2312 patients were observed with mean follow-up of 7.33 years. Of these, 434(19%; 102 intra-and 332 extrameatal tumors) changed to active treatment during the observation period due to tumor growth. 5 years after diagnosis, 21% of the intrameatal tumors exhibited growth during observation, whereas 37% of extrameatal tumors had grown, increasing to 25% intrameatal and 42% extrameatal after 10 years. Following growth, the intrameatal tumors were mostly observed further and the extrameatal mostly underwent surgery. Tumor growth occurred mainly within the first 5 years post diagnosis. CONCLUSION This natural history study documents the growth occurrence of both intra-and extrameatal VS during the first 12 years after diagnosis and should be used in patient counseling, management, and treatment decision making.
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Affiliation(s)
- Martin Reznitsky
- Department of Otorhinolaryngology, Head & Neck Surgery and Audiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | | | - Niels West
- Department of Otorhinolaryngology, Head & Neck Surgery and Audiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Sven-Eric Stangerup
- Department of Otorhinolaryngology, Head & Neck Surgery and Audiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Per Cayé-Thomasen
- Department of Otorhinolaryngology, Head & Neck Surgery and Audiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Long-term Outcomes of Gamma Knife Radiosurgery for Treating Vestibular Schwannoma With a Lower Prescription Dose of 12 Gy Compared With Higher Dose Treatment. Otol Neurotol 2021; 41:e1314-e1320. [PMID: 33492807 DOI: 10.1097/mao.0000000000002885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Gamma knife radiosurgery (GKRS) is commonly used to treat vestibular schwannomas (VSs). The risk of complications from GKRS decreases at lower doses, but it is unknown if long-term tumor control is negatively affected by dose reduction. STUDY DESIGN This was a retrospective case review and analysis of patient data. SETTING Tertiary referral center. PATIENTS Patients with VSs who underwent GKRS between 1990 and 2007 at the authors' institution. INTERVENTION(S) The subjects were divided into two cohorts based on the prescribed doses of radiation received: a 12 Gy cohort (96 patients) with a follow-up period of 124 months and a >12 Gy cohort (118 patients) with a follow-up period of 143 months. MAIN OUTCOME MEASURES Tumor control rates at 10 to 15 years, frequency of facial and trigeminal nerve complications, and hearing function. RESULTS The 10 to 15-year tumor control rates were 95% in the 12 Gy cohort and 88% in the > 12 Gy cohort, but the differences were not significant. Compared with the >12 Gy cohort, facial and trigeminal nerve deficits occurred significantly less frequently in the 12 Gy cohort, with the 10-year cumulative, permanent deficit-free rates being 2% and 0%, respectively. Multivariate analyses revealed that treatment doses exceeding 12 Gy were associated with a significantly higher risk for cranial nerve deficits. The percentage of subjects retaining pure-tone average ≤ 50 dB at the final follow-up did not significantly differ between the cohorts (12 Gy cohort, 30% and >12 Gy cohort, 33%; p = 0.823). CONCLUSIONS Dose reduction to 12 Gy for GKRS to treat VSs decreased facial and trigeminal nerve complications without worsening tumor control rates.
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Abstract
OBJECTIVE Comprehensive molecular profiling of radioresistant and cystic vestibular schwannoma (VS) subtypes. STUDY DESIGN Our study utilized whole-exome sequencing (WES), RNA-sequencing (RNAseq), and correlated clinical data from 12 samples (2 samples of solid sporadic subtype, 8 with cystic changes, and 2 previously irradiated). SETTING Academic medical center. PATIENTS Patients diagnosed with VS who required surgical treatment. Inclusion: Cystic and radioresistant tumors matched to age and tumor volume, with solid sporadic VS samples as control; Exclusion: NF-2 patients. INTERVENTION(S) WES using custom probes for copy number analysis. A modified version of the Agilent Human Whole Exome sequencing hybrid capture system was used to process samples. Recurrent variants were identified and compared between groups. Leukocyte-derived DNA was utilized as internal control to reduce false-positives. MAIN OUTCOME MEASURE(S) Analysis of genetic landscape of VS subtypes (naive solid VS, cystic VS, and previously irradiated VS) by performing deep next-generation sequencing. RESULTS WES data achieved a mean coverage of 202X and RNAseq generated an average of 74 million total reads. As a group, 25% of samples had 22q loss. Somatic analysis identified previously reported genes and multiple novel mutations across samples. Differential expression analysis of RNAseq data found significantly mutated genes such as COL6A3, CLMP, ART4, Lumican that were shared by both cystic VS and irradiated VS, but not seen in sporadic VS. CONCLUSIONS Using WES we were able to demonstrate that cystic and irradiated samples are subtypes of VS with an increased mutation burden and a unique genetic fingerprint. We identified differences between the genomic and molecular profile of cystic VS and radioresistant VS. Our results help advance the understanding of the pathophysiology of these tumor subtypes and suggest possible molecular targets for novel treatment strategies.
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46
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Balossier A, Régis J, Reyns N, Roche PH, Daniel RT, George M, Faouzi M, Levivier M, Tuleasca C. Repeat stereotactic radiosurgery for progressive vestibular schwannomas after previous radiosurgery: a systematic review and meta-analysis. Neurosurg Rev 2021; 44:3177-3188. [PMID: 33847846 PMCID: PMC8592961 DOI: 10.1007/s10143-021-01528-y] [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: 01/19/2021] [Revised: 03/13/2021] [Accepted: 03/16/2021] [Indexed: 11/28/2022]
Abstract
Vestibular schwannomas (VS) are slow-growing intracranial extraaxial benign tumors, developing from the vestibular part of the eight cranial nerves. Stereotactic radiosurgery (SRS) has now a long-term scientific track record as first intention treatment for small- to medium-sized VS. Though its success rate is very high, SRS for VS might fail to control tumor growth in some cases. However, the literature on repeat SRS after previously failed SRS remains scarce and reported in a low number of series with a limited number of cases. Here, we aimed at performing a systematic review and meta-analysis of the literature on repeat SRS for VS. Using PRISMA guidelines, we reviewed manuscripts published between January 1990 and October 2020 and referenced in PubMed. Tumor control and cranial nerve outcomes were evaluated with separate meta-analyses. Eight studies comprising 194 patients were included. The overall rate of patients treated in repeat SRS series as per overall series with first SRS was 2.2% (range 1.2–3.2%, p < 0.001). The mean time between first and second SRS was 50.7 months (median 51, range 44–64). The median marginal dose prescribed at first SRS was 12 Gy (range 8–24) and at second SRS was 12 Gy (range 9.8–19). After repeat SRS, tumor stability was reported in 61/194 patients, i.e., a rate of 29.6% (range 20.2–39%, I2 = 49.1%, p < 0.001). Tumor decrease was reported in 83/194 patients, i.e., a rate of 54.4% (range 33.7–75.1%, I2 = 89.1%, p < 0.001). Tumor progression was reported in 50/188 patients, i.e., a rate of 16.1% (range 2.5–29.7%, I2 = 87.1%, p = 0.02), rarely managed surgically. New trigeminal numbness was reported in 27/170 patients, i.e., a rate of 9.9% (range 1.4–18.3%, p < 0.02). New facial nerve palsy of worsened of previous was reported in 8/183 patients, i.e., a rate of 4.3% (range 1.4–7.2%, p = 0.004). Hearing loss was reported in 12/22 patients, i.e., a rate of 54.3% (range 24.8–83.8%, I2 = 70.7%, p < 0.001). Repeat SRS after previously failed SRS for VS is associated with high tumor control rates. Cranial nerve outcomes remain favorable, particularly for facial nerve. The rate of hearing loss appears similar to the one related to first SRS.
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Affiliation(s)
- Anne Balossier
- Functional, and Stereotactic Neurosurgery Service and Gamma Knife Unit, Assistance Publique - Hôpitaux de Marseille, Timone Hospital, Marseille, France.,Aix-Marseille University, Inserm, INS, Inst Neurosci Syst, Marseille, France
| | - Jean Régis
- Functional, and Stereotactic Neurosurgery Service and Gamma Knife Unit, Assistance Publique - Hôpitaux de Marseille, Timone Hospital, Marseille, France.,Aix-Marseille University, Inserm, INS, Inst Neurosci Syst, Marseille, France
| | - Nicolas Reyns
- University of Lille, Inserm, CHU de Lille, U1189 - ONCO-THAI -Laser Assisted Therapies and Immunotherapies for Oncology, F-59000, Lille, France.,Neurosurgery and Neurooncology Department, CHU de Lille, F-59000, Lille, France
| | - Pierre-Hugues Roche
- Neurosurgery Service, Neurochirurgie Hôpital Nord, Pôle NEUROSCIENCES, Hôpital Nord, Marseille, France
| | - Roy Thomas Daniel
- Department of Clinical Neurosciences, Neurosurgery Service and Gamma Knife Center, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.,Faculty of Biology and Medicine (FBM), University of Lausanne (Unil), Lausanne, Switzerland
| | - Mercy George
- Department of Otorhinolaryngology, Head & Neck Surgery, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Mohamed Faouzi
- Division of Biostatistics, Center for Primary Care and Public Health (Unisanté), Université de Lausanne, Lausanne, Switzerland
| | - Marc Levivier
- Department of Clinical Neurosciences, Neurosurgery Service and Gamma Knife Center, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.,Faculty of Biology and Medicine (FBM), University of Lausanne (Unil), Lausanne, Switzerland
| | - Constantin Tuleasca
- Department of Clinical Neurosciences, Neurosurgery Service and Gamma Knife Center, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland. .,Faculty of Biology and Medicine (FBM), University of Lausanne (Unil), Lausanne, Switzerland. .,Signal Processing Laboratory (LTS 5), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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Tawfik KO, Khan UA, Friedman RA. Treatment of Small Vestibular Schwannomas. CURRENT OTORHINOLARYNGOLOGY REPORTS 2021. [DOI: 10.1007/s40136-020-00326-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Pretreatment ADC predicts tumor control after Gamma Knife radiosurgery in solid vestibular schwannomas. Acta Neurochir (Wien) 2021; 163:1013-1019. [PMID: 33532869 DOI: 10.1007/s00701-021-04738-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 01/26/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Radiosurgery is a well-established treatment for vestibular schwannomas (VSs), but it is often difficult to identify which tumors will respond to treatment. We sought to determine whether pretreatment or posttreatment tumor apparent diffusion coefficient (ADC) values could predict tumor control in patients undergoing Gamma Knife radiosurgery (GKRS) and whether these values could differentiate between cases of pseudoprogression and cases of true progression in the early posttreatment period. METHODS We retrospectively identified patients who underwent GKRS for solid VSs between June 2008 and November 2016 and who had a minimum follow-up of 36 months. Pretreatment and posttreatment minimum, mean, and maximum ADC values were measured for the whole tumor volume and were compared between patients with tumor control and those with tumor progression. In patients with early posttreatment tumor enlargement, ADC values were compared between patients with pseudoprogression and those with true progression. RESULTS Of the 44 study patients, 34 (77.3%) demonstrated tumor control at final follow-up. Patients with tumor control had higher pretreatment minimum (1.35 vs 1.09; p = 0.008), mean (1.80 vs 1.45; p = 0.004), and maximum (2.41 vs 1.91; p = 0.011) ADC values than patients with tumor progression. ADC values did not differ between patients with pseudoprogression and those with true progression at early posttreatment follow-up. CONCLUSIONS ADC values may be helpful in predicting response to GKRS in patients with solid VSs but cannot predict which tumors will undergo pseudoprogression. Patients with higher pretreatment ADC values may be more likely to demonstrate posttreatment tumor control.
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Cesme DH, Alkan A, Gultekin MA, Sari L, Alkan G, Kaya A, Mayadagli A, Akdur K, Uysal O, Hatiboglu MA. Diffusion Tensor Imaging Features of the Auditory Pathways in Patients With Vestibular Schwannoma After Gamma Knife Radiosurgery. Cureus 2021; 13:e14143. [PMID: 33927945 PMCID: PMC8075324 DOI: 10.7759/cureus.14143] [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] [Indexed: 11/26/2022] Open
Abstract
Objective In this study, we aimed to investigate whether there is any change in diffusion tensor imaging (DTI) parameters in ipsilateral and contralateral auditory pathways after Gamma Knife radiosurgery (GKR) in patients with vestibular schwannoma (VS) and the relationship between radiosurgery variables. Methods Sixty-six patients were evaluated with MRI and DTI before and after GKR. The apparent diffusion coefficient (ADC) and fractional anisotropy (FA) were measured from the bilateral lateral lemniscus (LL), inferior colliculus (IC), medial geniculate body (MGB), and Heschl's gyrus (HG). Results There was no significant difference in ADC and FA values obtained from bilateral LL, IC, and MGB before and after radiosurgery. However, there was a significant difference between pretreatment and post-radiosurgery contralateral HG ADC values. The ADC values obtained from the contralateral HG and IC positively correlated with the duration after radiosurgery. As the duration after radiosurgery increases, the difference between the ADC values obtained from ipsilateral and contralateral HG also increases. Conclusion The high ADC values in the contralateral HG after radiosurgery may indicate microstructural alterations such as demyelination and axonal loss. Radiation exposure doses to the brainstem and cochlea are the most important factors that can cause microstructural damage to the auditory pathways. When planning radiosurgery, extreme care should be taken to prevent the harmful effects of radiation on the auditory pathways.
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Affiliation(s)
- Dilek H Cesme
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Alpay Alkan
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Mehmet Ali Gultekin
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Lutfullah Sari
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Gokberk Alkan
- Otorhinolaryngology, Abdurrahman Yurtaslan Oncology Training and Research Hospital, Ankara, TUR
| | - Ahmet Kaya
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Alpaslan Mayadagli
- Radiation Oncology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Kerime Akdur
- Radiation Oncology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Omer Uysal
- Biostatistics, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
| | - Mustafa A Hatiboglu
- Neurosurgery, Faculty of Medicine, Bezmialem Vakif University, Istanbul, TUR
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Ermiş E, Anschuetz L, Leiser D, Poel R, Raabe A, Manser P, Aebersold DM, Caversaccio M, Mantokoudis G, Abu-Isa J, Wagner F, Herrmann E. Vestibular dose correlates with dizziness after radiosurgery for the treatment of vestibular schwannoma. Radiat Oncol 2021; 16:61. [PMID: 33771181 PMCID: PMC7995572 DOI: 10.1186/s13014-021-01793-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 03/18/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Stereotactic radiosurgery (SRS) has been recognized as a first-line treatment option for small to moderate sized vestibular schwannoma (VS). Our aim is to evaluate the impact of SRS doses and other patient and disease characteristics on vestibular function in patients with VS. METHODS Data on VS patients treated with single-fraction SRS to 12 Gy were retrospectively reviewed. No dose constraints were given to the vestibule during optimization in treatment planning. Patient and tumor characteristics, pre- and post-SRS vestibular examination results and patient-reported dizziness were assessed from patient records. RESULTS Fifty-three patients were analyzed. Median follow-up was 32 months (range, 6-79). The median minimum, mean and maximum vestibular doses were 2.6 ± 1.6 Gy, 6.7 ± 2.8 Gy, and 11 ± 3.6 Gy, respectively. On univariate analysis, Koos grade (p = 0.04; OR: 3.45; 95% CI 1.01-11.81), tumor volume (median 6.1 cm3; range, 0.8-38; p = 0.01; OR: 4.85; 95% CI 1.43-16.49), presence of pre-SRS dizziness (p = 0.02; OR: 3.98; 95% CI 1.19-13.24) and minimum vestibular dose (p = 0.033; OR: 1.55; 95% CI 1.03-2.32) showed a significant association with patient-reported dizziness. On multivariate analysis, minimum vestibular dose remained significant (p = 0.02; OR: 1.75; 95% CI 1.05-2.89). Patients with improved caloric function had received significantly lower mean (1.5 ± 0.7 Gy, p = 0.01) and maximum doses (4 ± 1.5 Gy, p = 0.01) to the vestibule. CONCLUSIONS Our results reveal that 5 Gy and above minimum vestibular doses significantly worsened dizziness. Additionally, mean and maximum doses received by the vestibule were significantly lower in patients who had improved caloric function. Further investigations are needed to determine dose-volume parameters and their effects on vestibular toxicity.
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Affiliation(s)
- Ekin Ermiş
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Lukas Anschuetz
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Dominic Leiser
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
- Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland
| | - Robert Poel
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Andreas Raabe
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Peter Manser
- Division of Medical Radiation Physics, Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Daniel M Aebersold
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Marco Caversaccio
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Georgios Mantokoudis
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Janine Abu-Isa
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Franca Wagner
- Department of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Evelyn Herrmann
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland.
- Department of Radiation Oncology, Hôpital Riviera-Chablais, Rennaz, Switzerland.
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