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Vestibular schwannoma

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https://www.readbyqxmd.com/read/28108789/-surgical-indications-and-complications-management-in-vestibular-schwannoma
#1
S Rosahl, D Eßer
BACKGROUND: Recent surgical treatment concepts for patients with vestibular schwannoma (VS) require an interdisciplinary approach as well as recognition and mastering of complications. OBJECTIVE: This paper provides an overview of indications, as well as possible options for function preservation and management of complications in the surgical resection of these tumors. METHODS: Up-to-date treatment concepts and surgical indications were differentiated according to size and extent of tumors...
January 20, 2017: HNO
https://www.readbyqxmd.com/read/28098509/-compassionate-use-protocol-for-auditory-brainstem-implantation-in-neurofibromatosis-type-2-early-house-ear-institute-experience
#2
Daniel S Roberts, William H Slattery, Brian S Chen, Steve R Otto, Marc S Schwartz, Gregory P Lekovic
OBJECTIVE: To report the preliminary outcomes of auditory brainstem implantation (ABI) under a compassionate use protocol for two ABI devices that are not approved by the US Food and Drug Administration. METHODS: A retrospective review was performed of neurofibromatosis type 2 (NF2) patients who underwent microsurgery for vestibular schwannoma (VS) and placement of either the Cochlear ABI541 or Med-El Synchrony ABIs. Peri-operative and device- related complications were reviewed...
January 18, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28089525/radiotherapeutic-management-of-vestibular-schwannomas-using-size-and-location-adapted-fractionation-regimens-to-maximize-the-therapeutic-ratio
#3
Benjamin G Slane, Uma Goyal, Joel L Grow, Christopher Morrison, Craig R Hullet, John Gordon, Abhay Sanan, Baldassarre Stea
BACKGROUND: We evaluated and compared the radiographic and clinical outcomes of patients with vestibular schwannomas treated with single fraction stereotactic radiosurgery (SRS), 5 fractions of hypofractionated stereotactic radiation therapy (hSRT), or 25 to 30 fractions of conventionally fractionated stereotactic radiation therapy (cfSRT). METHODS AND MATERIALS: Fifty-six patients treated with LINAC-based SRS (median, 12.5 Gy), hSRT (25 Gy), or cfSRT (median, 54 Gy) were retrospectively reviewed...
October 28, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28079677/cadaveric-testing-of-robot-assisted-access-to-the-internal-auditory-canal-for-vestibular-schwannoma-removal
#4
Neal P Dillon, Ramya Balachandran, Michael A Siebold, Robert J Webster, George B Wanna, Robert F Labadie
HYPOTHESIS: An image-guided robotic system can safely perform the bulk removal of bone during the translabyrinthine approach to vestibular schwannoma (VS). BACKGROUND: The translabyrinthine approach to VS removal involves extensive manual milling in the temporal bone to gain access to the internal auditory canal (IAC) for tumor resection. This bone removal is time consuming and challenging due to the presence of vital anatomy (e.g., facial nerve) embedded within the temporal bone...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28078405/-radiosurgery-and-fractionated-stereotactic-radiotherapy-of-vestibular-schwannoma
#5
K Hamm, H-U Herold, G Surber, S Rosahl
Management of vestibular schwannoma (VS) should always be interdisciplinary and results better than the natural course. Particularly in small VS, either microsurgical resection or radiosurgery (RS) can be employed. RS is a special method (initially only possible stereotactically) for delivering high-precision radiation from many directions to the target point (the isocenter) in a single high dose. With the development of three different systems-Gamma Knife (Elekta, Stockholm, Sweden), special linear accelerators, and CyberKnife (Accuray, Sunnyvale, CA, USA)-the options were extended to 1-5 fractions for RS and multisession RS (msRS), and to up to 6 weeks of conventional fractionation as stereotactic radiotherapy (SRT)...
January 11, 2017: HNO
https://www.readbyqxmd.com/read/28072654/adverse-events-following-vestibular-schwannoma-surgery-a-comparison-of-surgical-approach
#6
Anthony M Tolisano, Philip D Littlefield
OBJECTIVE: Compare complications of vestibular schwannoma (VS) resection by surgical approach. STUDY DESIGN: Retrospective cohort. SETTING: The 2008 to 2013 American College of Surgeons-National Surgical Quality Improvement Program. PATIENTS: Adult patients with VS resection by an otolaryngologist. INTERVENTIONS: VS resection via transtemporal (TT), retrosigmoid (RS), or middle cranial fossa (MCF) approaches...
January 9, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28068303/delayed-vestibular-schwannoma-regrowth-following-shrinkage-after-stereotactic-radiosurgery-implication-for-life-long-surveillance
#7
Emma Stapleton, John A Crowther, Richard Locke, Georgios Kontorinis
OBJECTIVE: To enhance understanding of the behavior of vestibular schwannomas (VS) after stereotactic radiosurgery (SRS), including the potential for late tumor regrowth, and the need for lifelong radiological and clinical surveillance. PATIENTS: From a total of 540 patients with VS and out of 95 patients receiving SRS for their growing VS, the cases of two women patients aged 58 and 59 years with medium sized, growing VS are presented. INTERVENTION: Both patients were treated with SRS...
February 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28067722/-neutrophil-to-lymphocyte-ratio-as-a-predictive-marker-of-vestibular-schwannoma-growth-otology-neurotology-2016-37-580-5
#8
Satvinder Singh Bakshi
No abstract text is available yet for this article.
February 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28058466/-malignization-of-vestibular-schwannoma-13%C3%A2-years-after-radiation-therapy
#9
S Simmermacher, D Vordermark, T Kegel, C Strauss
This article presents a case of malignant transformation of vestibular schwannoma 13 years after stereotactic radiation therapy, which lead to an acute life-threatening condition. Although the observation is currently only based on case reports, an increasing number of these support the hypothesis that there is a relevant risk of malignant transformation in the long-term course of previously irradiated vestibular schwannomas. Therefore, long-term MRI follow-up should be considered.
January 5, 2017: HNO
https://www.readbyqxmd.com/read/28045630/outcomes-of-vestibular-schwannoma-surgery-among-the-elderly
#10
Michael J Sylvester, Darshan N Shastri, Viral M Patel, Milap D Raikundalia, Jean Anderson Eloy, Soly Baredes, Yu-Lan Mary Ying
Objective To compare comorbidities and in-hospital complications between elderly and nonelderly patients undergoing vestibular schwannoma (VS) surgery. To examine average length of stay (LOS) and hospital charges among elderly patients. Study Design Population-based inpatient registry analysis. Setting Academic medical center. Subjects and Methods Retrospective analysis of the National Inpatient Sample for patients undergoing VS surgery from 2002 to 2010: 4137 patients met inclusion criteria, with 519 (12.5%) in the elderly cohort (≥65 years)...
January 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28034444/improvement-in-imaging-common-temporal-bone-pathologies-at-3-t-mri-small-structures-benefit-from-a-small-field-of-view
#11
M Schulze, K Reimann, A Seeger, U Klose, U Ernemann, T K Hauser
AIM: To compare image quality and evaluate its clinical importance in common temporal bone pathologies of a pTX-SPACE (parallel transmit [pTX] three-dimensional turbo spin-echo with variable flip angle [SPACE]) magnetic resonance imaging (MRI) sequence improved for spatial resolution to a standard-SPACE sequence exhibiting the same scan time at 3 T. MATERIALS AND METHODS: Thirty-four patients were examined using a standard-SPACE and resolution improved pTX-SPACE sequence at 3 T MRI...
December 26, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/28019663/stereotactic-radiosurgery-planning-of-vestibular-schwannomas-is-mri-at-3-tesla-geometrically-accurate
#12
M A Schmidt, E J Wells, K Davison, A M Riddell, L Welsh, F Saran
PURPOSE: MRI is a mandatory requirement to accurately plan Stereotactic Radiosurgery (SRS) for Vestibular Schwannomas. However, MRI may be distorted due not only to inhomogeneity of the static magnetic field and gradients but also due to susceptibility-induced effects, which are more prominent at higher magnetic fields. We assess geometrical distortions around air spaces and consider MRI protocol requirements for SRS planning at 3T. METHODS: Hardware-related distortion and the effect of incorrect shimming were investigated with structured test objects...
December 26, 2016: Medical Physics
https://www.readbyqxmd.com/read/28017747/complications-and-their-managements-of-large-intracranial-vestibular-schwannoma-via-retrosigmoid-approach
#13
Xiang Huang, Ming Xu, Jian Xu, Liangfu Zhou, Ping Zhong, Mingyu Chen, Kaiyuan Ji, Huiyu Chen, Ying Mao
OBJECTIVE: To investigate the common complications from the microsurgical treatment of large intracranial vestibular schwannoma (VS) via suboccipital retrosigmoid approach and to propose strategies for minimizing such complications. METHODS: We selected all large unilateral VS patients from the collected database (1999-2013) who underwent microsurgical resection as their initial treatment for histopathologically confirmed VS. Tumors larger than 30 x 20 mm were defined as large...
December 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27999710/an-unusual-case-of-repeated-intracranial-hemorrhage-in-vestibular-schwannoma
#14
Saeed Banaama, Jacobus van Overbeeke, Yasin Temel
BACKGROUND: Symptomatic intratumoral hemorrhage (ITH) in vestibular schwannoma (VS) is rare. A repeated hemorrhage is, therefore, even more exceptional. Repeated ITH has been reported in four cases thus far in English literature. Here, we describe a patient with a Koos grade D VS who presented to our Skull Base team with repeated ITH and an unexpected disease course. CASE DESCRIPTION: A 76-year-old woman presented with hearing loss due to polycystic VS on the left side...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27981336/erratum-to-fractionated-vs-single-fraction-stereotactic-radiotherapy-in-patients-with-vestibular-schwannoma-hearing-preservation-and-patients-self-reported-outcome-based-on-an-established-questionnaire
#15
Kerstin A Kessel, H Fischer, M M Vogel, M Oechsner, H Bier, B Meyer, S E Combs
No abstract text is available yet for this article.
December 15, 2016: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/27965072/rare-lesions-of-the-internal-auditory-canal
#16
Kentaro Watanabe, Mary In-Ping Huang Cobb, Ali R Zomorodi, Calhoun D Cunningham, Yoichi Nonaka, Shunsuke Satoh, Allan H Friedman, Takanori Fukushima
BACKGROUND: Approximately 95% of tumors occurring within the internal auditory canal (IAC) are vestibular schwannomas (VSs). Many undergo stereotactic radiation without definitive tissue diagnosis. Rare IAC tumors are not all radiosensitive and are poorly described. METHODS: Between 1992 and 2015, 289 consecutive patients with IAC lesions operated on were retrospectively reviewed. RESULTS: Fifteen patients (5.2%) (16 operations) had unusual histological findings, including non-vestibular schwannomas (two facial schwannomas, two cochlear schwannomas, two intermedius schwannomas), three meningiomas, three cavernous hemangiomas, a mucosa associated lymphoid tissue (MALT) lymphoma, an arachnoid cyst, and a lipochoristoma...
December 10, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27958595/childhood-neurofibromatosis-type-2-nf2-and-related-disorders-from-bench-to-bedside-and-biologically-targeted-therapies
#17
M Ruggieri, A D Praticò, A Serra, L Maiolino, S Cocuzza, P Di Mauro, L Licciardello, P Milone, G Privitera, G Belfiore, M Di Pietro, F Di Raimondo, A Romano, A Chiarenza, M Muglia, A Polizzi, D G Evans
Neurofibromatosis type 2 [NF2; MIM # 101000] is an autosomal dominant disorder characterised by the occurrence of vestibular schwannomas (VSs), schwannomas of other cranial, spinal and cutaneous nerves, cranial and spinal meningiomas and/or other central nervous system (CNS) tumours (e.g., ependymomas, astrocytomas). Additional features include early onset cataracts, optic nerve sheath meningiomas, retinal hamartomas, dermal schwannomas (i.e., NF2-plaques), and (few) café-au-lait spots. Clinically, NF2 children fall into two main groups: (1) congenital NF2 - with bilateral VSs detected as early as the first days to months of life, which can be stable/asymptomatic for one-two decades and suddenly progress; and (2) severe pre-pubertal (Wishart type) NF2- with multiple (and rapidly progressive) CNS tumours other-than-VS, which usually present first, years before VSs [vs...
October 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/27958212/association-of-bilateral-multiple-presumed-retinal-astrocytic-proliferations-with-combined-hamartoma-of-retina-and-retinal-pigment-epithelium-in-a-9-year-old-male-child-with-neurofibromatosis-type-2
#18
Pukhraj Rishi, Raj Shri Hirawat, Aditya Verma
Neurofibromatosis type 2 (NF-2) is characterized by multifocal proliferation of neural crest-derived cells. The characteristics finding of NF-2 is bilateral vestibular schwannomas. Combined hamartoma of retina and retinal epithelium (CHRRPE) is another associated finding. A 9 year-old-male child presented with left eye decreased vision for 3 months. Visual acuity was 0.0 and 0.8 LogMAR in the right and left eye, respectively. Left fundus showed an elevated, pigmented lesion with surface wrinkling and vascular tortuosity suggestive of CHRRPE with multiple presumed retinal astrocytic proliferations in mid-periphery...
November 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27941410/response-to-comment-on-neutrophil-to-lymphocyte-ratio-as-a-predictive-marker-of-vestibular-schwannoma-growth
#19
Georgios Kontorinis, John A Crowther, Richard Locke
No abstract text is available yet for this article.
December 9, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27929596/primary-solitary-intralabyrinthine-schwannoma-a-report-of-7-cases-and-a-review-of-the-literature
#20
Avi Shupak, Yehuda Holdstein, Margalit Kaminer, Itzhak Braverman
Intralabyrinthine schwannomas (ILSs) are uncommon benign tumors that originate in the Schwann cell sheath of the intralabyrinthine distal branches of the vestibulocochlear nerve. They have no initial involvement in the internal auditory canal, although that might develop later. These lesions can arise inside the cochlea, originate in the vestibule or, in rare cases, develop in the semicircular canals. From these sites, spread might take place via the anatomic connections between the perilymphatic spaces in the scala vestibuli and the anterior vestibule...
December 2016: Ear, Nose, & Throat Journal
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