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Vestibular schwannoma

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https://www.readbyqxmd.com/read/29781505/cerebral-vasculopathy-in-childhood-neurofibromatosis-type-2-cause-for-concern
#1
Karine Lascelles, Shazia Afridi, Ata Siddiqui, Cheryl Hemingway, Rosalie Ferner, Vijeya Ganesan
Unlike adult neurofibromatosis type 2 (NF2), which presents with symptoms related to bilateral vestibular schwannomas, children with NF2 most frequently present with ocular, dermatological, and neurological symptoms. Arteriopathy, a well-established feature in neurofibromatosis type 1, is not a widely recognized feature of NF2. Here we report three children with NF2 with cerebral arteriopathy and/or arterial ischaemic stroke. Bevacizumab, a vascular endothethial growth factor inhibitor, is an established treatment for rapidly growing vestibular schwannomas; however, it carries a risk of both ischaemic and haemorrhagic stroke...
May 21, 2018: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/29781154/neuroglial-ectopia-of-the-vestibular-nerve-masquerading-as-a-vestibular-schwannoma-a-case-report
#2
John P Sheppard, Carlito Lagman, Thien Nguyen, Négar Khanlou, Quinton Gopen, Isaac Yang
Neuroglial ectopia is a rare entity of undetermined clinical significance. Here, we report a unique case of neuroglial ectopia of the vestibular nerve. A 27-year-old pharmacy student with a previous radiological diagnosis of vestibular schwannoma presented to our clinic for surgical evaluation. Magnetic resonance imaging (MRI) of the brain revealed a 17-mm T1 hypo- to isointense, T2 iso- to hyperintense, poorly enhancing left cerebellopontine angle mass extending into the left internal auditory canal compatible by imaging with a vestibular schwannoma...
May 20, 2018: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/29775147/intraoperative-cochlear-nerve-mapping-with-the-mobile-cochlear-nerve-compound-action-potential-tracer-in-vestibular-schwannoma-surgery
#3
Nobuyuki Watanabe, Takuya Ishii, Kazuhiko Fujitsu, Shogo Kaku, Teruo Ichikawa, Kosuke Miyahara, Tomu Okada, Shin Tanino, Yasuhiro Uriu, Yuichi Murayama
OBJECTIVE The authors describe the usefulness and limitations of the cochlear nerve compound action potential (CNAP) mobile tracer (MCT) that they developed to aid in cochlear nerve mapping during vestibular schwannoma surgery (VSS) for hearing preservation. METHODS This MCT device requires no more than 2 seconds for stable placement on the nerve to obtain the CNAP and thus is able to trace the cochlear nerve instantaneously. Simultaneous bipolar and monopolar recording is possible. The authors present the outcomes of 18 consecutive patients who underwent preoperative useful hearing (defined as class I or II of the Gardner-Robertson classification system) and underwent hearing-preservation VSS with the use of the MCT...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29765830/long-term-facial-nerve-outcomes-after-microsurgical-resection-of-vestibular-schwannomas-in-patients-with-preoperative-facial-nerve-palsy
#4
Michael A Mooney, Benjamin Hendricks, Christina E Sarris, Robert F Spetzler, Kaith K Almefty, Randall W Porter
Objectives  This study aimed at evaluating facial nerve outcomes in vestibular schwannoma patients presenting with preoperative facial nerve palsy. Design  A retrospective review. Setting  Single-institution cohort. Participants  Overall, 368 consecutive patients underwent vestibular schwannoma resection. Patients with prior microsurgery or radiosurgery were excluded. Main Outcome Measures  Incidence, House-Brackmann grade. Results  Of 368 patients, 9 had confirmed preoperative facial nerve dysfunction not caused by prior treatment, for an estimated incidence of 2...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29765828/a-cross-sectional-survey-of-the-north-american-skull-base-society-on-vestibular-schwannoma-part-2-perioperative-practice-patterns-of-vestibular-schwannoma-in-north-america
#5
Jamie J Van Gompel, Matthew L Carlson, R Mark Wiet, Nicole M Tombers, Anand K Devaiah M, Devyani Lal, Jacques J Morcos, Michael J Link
Introduction  Perioperative care of vestibular schwannoma (VS) patients is extremely variable across surgeons and institutions making practice patterns difficult to standardize. No data currently exist detailing this practice variability. Methods  The North American Skull Base Society membership was electronically surveyed regarding perioperative care of surgically operated VS patients. Results  There were 87 respondents to the survey. Surgical positioning, surgical approach utilized, and perioperative medical adjuncts are quite variable...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29765827/a-cross-sectional-survey-of-the-north-american-skull-base-society-current-practice-patterns-of-vestibular-schwannoma-evaluation-and-management-in-north-america
#6
Matthew L Carlson, Jamie J Van Gompel, R Mark Wiet, Nicole M Tombers, Anand K Devaiah, Devyani Lal, Jacques J Morcos, Michael J Link
Background  Very few studies have examined vestibular schwannoma (VS) management trends across centers and between providers. The objective of this study is to examine current practice trends, variance in treatment philosophies, and nuanced or controversial aspects of VS care across North America. Methods  This is a cross-sectional survey of North American Skull Base Society (NASBS) members who report regular involvement in VS care. Results  A total of 57 completed surveys were returned. Most respondents claimed to have over 20 years of experience and the majority reported working in an academic practice with an affiliated otolaryngology and/or neurosurgery residency program...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29765825/early-career-surgical-practice-for-cerebellopontine-angle-tumors-in-the-era-of-radiosurgery
#7
Giannantonio Spena, Tommaso Sorrentino, Roberto Altieri, Luca Redaelli de Zinis, Roberto Stefini, Pier Paolo Panciani, Marco Fontanella
We analyzed the outcomes of patients with large cerebellopontine angle (CPA) tumors treated by a skull-base team in which two surgeons (one neurosurgeon and one otological surgeon) were in the beginning of their careers (<40 years old). Data of patients operated on between April 2012 and March 2016 were reviewed. All factors related to surgical training were considered. Thirty-one patients had vestibular schwannomas, while 26 had meningiomas. Mean tumor diameter was 30.6 mm (range, 23-49 mm) for schwannomas and 35 mm (range, 22-51 mm) for meningiomas...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29764782/eaono-position-statement-on-vestibular-schwannoma-imaging-assessment-what-are-the-indications-for-performing-a-screening-mri-scan-for-a-potential-vestibular-schwannoma
#8
Jérôme Waterval, Romain Kania, Thomas Somers
No abstract text is available yet for this article.
April 2018: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29764781/eaono-position-statement-on-vestibular-schwannoma-imaging-assessment-question-how-should-growth-of-vestibular-schwannoma-be-defined
#9
Romain Kania, Benjamin Vérillaud, Domitille Camous, Charlotte Hautefort, Thomas Somers, Jérôme Waterval, Sébastien Froelich, Philippe Herman
The relevance of defining the growth of vestibular schwannoma (VS) is that any significant VS growth may impact treatment strategy. A conservative treatment strategy is often proposed as a primary treatment option in the management of VS. Several authors have demonstrated that a significant proportion of VSs do not grow, and those that do, usually grow slowly. Surgical and/or radiosurgical treatment options may be offered to the patient according to the VS growth. Therefore, defining the VS growth is a determinant in managing treatment strategies...
April 2018: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29764780/what-is-the-required-frequency-of-mri-scanning-in-the-wait-and-scan-management
#10
Thomas Somers, Romain Kania, Jerome Waterval, Tony Van Havenbergh
The wait and scan policy is being increasingly used as the first measure after the diagnosis of a vestibular schwannoma (VS) using magnetic resonance imaging (MRI). As part of the European Academy of Otology and Neuro-Otology (EAONO) position statement on VS, the frequency of imaging has been studied in the literature. Among 163 studies, 29 fulfilled the inclusion criteria and were scored using the Grading of Recommendations, Assessment, Development, and Evaluation system. Because tumor growth rate during the first 5 years of follow-up is predictive of further growth during the upcoming years, a protocol for wait and scan is useful for centers dealing with this condition...
April 2018: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29756618/intraparotid-facial-nerve-schwannoma-two-case-reports-and-a-review-of-the-literature
#11
M Simone, E Vesperini, C Viti, A Camaioni, L Lepanto, F Raso
Schwannomas are rare benign tumours that arise from Schwann cells. The most known and studied is the intracranial vestibular schwannoma, even if it is not the most frequent. More often schwannomas arise from peripheral sensitive nerves, and the vagous is most involved among the cranial nerves. Intraparotid schwannomas account for just 10% of all facial involvement, so they are an extremely rare localisation. At present, there are less than 100 cases described in the literature. We performed a retrospective analysis of parotidectomy in two Italian hospitals and present two cases of intraparotid schwannoma and a review of the literature...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29756611/cochlear-obliteration-following-a-translabyrinthine-approach-and-its-implications-in-cochlear-implantation
#12
B Delgado-Vargas, M Medina, R Polo, A Lloris, M Vaca, C Pérez, A Cordero, I Cobeta
The most frequent sequelae following a translabyrinthine approach for vestibular schwannoma resection is complete hearing loss on the affected side. Such patients could benefit from a cochlear implant, provided that two essential requisites are met before surgery: a preserved cochlear nerve and a patent cochlea to accommodate the electrode array. The goal of our study is to determine the prevalence and extent of cochlear ossification following a translabyrinthine approach. Postoperative MRI of 41 patients were retrospectively reviewed...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29752157/evaluation-of-a-novel-software-application-for-magnetic-resonance-distortion-correction-in-cranial-stereotactic-radiosurgery
#13
Juan-Francisco Calvo-Ortega, José Mateos, Ángel Alberich, Sandra Moragues, Juan-José Acebes, Sol San José, Joan Casals
This study aimed to validate a novel commercially available software for correcting spatial distortion in cranial magnetic resonance (MR) images. This software has been used to assess the dosimetric impact of MR distortion in stereotactic radiosurgery (SRS) treatments of vestibular schwannomas (VSs). Five MR datasets were intentionally distorted. Each distorted MR dataset was corrected using the Cranial Distortion software, obtaining a new corrected MR dataset (MRcorr). The accuracy of the correction was quantified by calculating the target registration error (TRE) for 6 anatomical landmarks identified in the co-registered MRcorr and planning computed tomography (pCT) images...
May 8, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29750273/video-head-impulse-test-to-preoperatively-identify-the-nerve-of-origin-of-vestibular-schwannomas
#14
Felipe Constanzo, Patricia Sens, Bernardo Corrêa de Almeida Teixeira, Ricardo Ramina
BACKGROUND: Identification of the nerve of origin in vestibular schwannoma (VS) is an important prognostic factor for hearing preservation surgery. Thus far, vestibular functional tests and magnetic resonance imaging have not yielded reliable results to preoperatively evaluate this information. The development of the video head impulse test (vHIT) has allowed a precise evaluation of each semicircular canal, and its localizing value has been tested for some peripheral vestibular diseases, but not for VS...
May 10, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29738393/response-to-letter-to-the-editor-transcanal-transpromontorial-approach-to-vestibular-schwannoma-are-we-there-yet
#15
Daniele Marchioni, Davide Soloperto, Barbara Masotto, Cristoforo Fabbris, Stefano De Rossi, Domenico Villari, Livio Presutti
No abstract text is available yet for this article.
June 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29738392/transcanal-transpromontorial-approach-to-vestibular-schwannoma-are-we-there-yet
#16
Sampath Chandra Prasad, Mario Sanna
No abstract text is available yet for this article.
June 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29738391/comparison-of-clinical-characteristics-and-surgical-outcomes-of-cystic-and-solid-vestibular-schwannomas
#17
Ji Hyuk Han, Kwang Ha Baek, Young Woo Lee, Young Kyun Hur, Hyun Ji Kim, In Seok Moon
OBJECTIVE: The aim of this study was to compare the clinical characteristics of cystic vestibular schwannomas (CVSs) and solid vestibular schwannomas (SVSs). STUDY DESIGN: Retrospective review. SETTING: Tertiary care center. PATIENTS: A total of 220 patients who underwent microsurgery for vestibular schwannomas between 2007 and 2016. INTERVENTION: CVSs were defined as cystic components ≥1/3 of total tumor volume based on automated volume measurement...
June 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29738390/incidence-and-risk-factors-for-sigmoid-venous-thrombosis-following-cpa-tumor-resection
#18
Matthew Shew, Hannah Kavookjian, Kelly Dahlstrom, Thomas Muelleman, James Lin, Paul Camarata, Luke N Ledbetter, Hinrich Staecker
OBJECTIVE: Our primary aim was to determine the incidence of sigmoid venous thrombosis (SVT) and determine risks factors and sequelae of SVT following cerebellopontine angle tumor resection. STUDY DESIGN: Retrospective cohort study. SETTING: Academic tertiary care hospital. PATIENTS: Patients over 18 years of age who underwent resection of cerebellopontine angle meningioma or vestibular schwannoma from January 2005 to April 2016 who had postoperative magnetic resonance imaging...
June 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29729464/spinal-meningioma-arising-from-the-denticulate-ligament-a-case-report
#19
Masahiro Sawada, Takuro Nakae, Toshihiro Munemitsu, Masato Hojo
BACKGROUND: To control bleeding during spinal meningioma surgery, the early resection of the dural attachment is important. Here, we report the case of a meningioma where identifying the tumor's dural attachment was difficult because the tumor arose from the denticulate ligament. This report is the first to histopathologically and surgically describe this rare occurrence. CASE DESCRIPTION: A 38-year-old man presented with a mass lesion that was found during a follow-up examination for his vestibular schwannoma surgery two years prior...
May 2, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29729463/radiosurgery-induced-anterior-inferior-cerebellar-artery-pseudoaneurysm-treated-with-trapping-and-bypass
#20
Motoyuki Umekawa, Hirotaka Hasegawa, Masahiro Shin, Mariko Kawashima, Seiji Nomura, Hirofumi Nakatomi, Nobuhito Saito
BACKGROUND: Stereotactic radiosurgery (SRS) is an established modality for the treatment of vestibular schwannomas (VSs). However, its long-term vascular complications have not been well-studied. Among the 360 patients who underwent SRS for VS in our institution and lived for >5 years thereafter, we identified only 1 patient who exhibited complication due to a late-onset aneurysm; thus, the incidence was roughly estimated to be 0.3%. CASE DESCRIPTION: The patient was a 78-year-old man who had undergone SRS for a right VS, and presented with right peripheral facial palsy 19 years later...
May 2, 2018: World Neurosurgery
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