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Acoustic schwannoma

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https://www.readbyqxmd.com/read/28319458/quality-of-life-in-807-patients-with-vestibular-schwannoma-comparing-treatment-modalities
#1
Géke Soulier, Bibian M van Leeuwen, Hein Putter, Jeroen C Jansen, Martijn J A Malessy, Peter Paul G van Benthem, Andel G L van der Mey, Anne M Stiggelbout
Objective In vestibular schwannoma treatment, the choice among treatment modalities is controversial. The first aim of this study was to examine the quality of life of patients with vestibular schwannoma having undergone observation, radiation therapy, or microsurgical resection. The second aim was to examine the relationship between perceived symptoms and quality of life. Last, the association between quality of life and time since treatment was studied. Study Design Cross-sectional study. Setting Tertiary referral center...
March 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28261433/ultrasonographic-and-clinical-characteristics-of-schwannoma-of-the-hand
#2
Seoung Joon Lee, Seok Tae Yoon
BACKGROUND: The purpose of this study was to report the ultrasonographic findings and clinical features of schwannoma of the hand. METHODS: We enrolled 8 patients who were initially diagnosed with ganglion by ultrasonography but finally with schwannoma by a tissue biopsy. We retrospectively analyzed the ultrasonographic findings of eight patients including echogenicity, internal homogeneity, posterior enhancement, internal vascularity, and clinical manifestations such as the occurrence site, tenderness, Tinel's sign, and paresthesia before the surgery...
March 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28243783/acoustic-schwannoma-with-intracochlear-extension-and-primary-intracochlear-schwannoma-removal-through-translabyrinthine-approach-with-facial-bridge-cochleostomy-and-transcanal-approach
#3
A Mazzoni, E Zanoletti, C Faccioli, A Martini
Intracochlear schwannomas can occur either as an extension of a larger tumor from the internal auditory canal, or as a solitary labyrinthine tumor. They are currently removed via a translabyrinthine approach extended to the basal turn, adding a transotic approach for tumors lying beyond the basal turn. Facial bridge cochleostomy may be associated with the translabyrinthine approach to enable the whole cochlea to be approached without sacrificing the external auditory canal and tympanum. We describe seven cases, five of which underwent cochlear schwannoma resection with facial bridge cochleostomy, one case with the same procedure for a suspect tumor and one, previously subjected to radical tympanomastoidectomy, who underwent schwannoma resection via a transotic approach...
February 27, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28162791/endoscopic-assistance-in-retrosigmoid-transmeatal-approach-to-intracanalicular-vestibular-schwannomas-an-alternative-for-middle-fossa-approach-technical-note
#4
Grzegorz Turek, Carlos Cotúa, Rocio Evangelista Zamora, Marcos Tatagiba
BACKGROUND: Complete surgical removal of intracanalicular vestibular schwannomas with nerve VII and VIII sparing and without worsening patient's status is challenging. Also the choice of an optimal surgical technique, which is usually limited to selection between retrosigmoid transmeatal (RT) and middle fossa (MF) approach, can be a challenge. Although many previous studies documented superiority of RT to MF approach and vice versa, still no consensus has been reached regarding an optimal approach to intracanalicular vestibular schwannomas...
January 19, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28116984/validation-of-the-penn-acoustic-neuroma-quality-of-life-scale-panqol-for-spanish-speaking-patients
#5
Maria Del Mar Medina, Alvaro Carrillo, Ruben Polo, Borja Fernandez, Daniel Alonso, Miguel Vaca, Adela Cordero, Cecilia Perez, Alfonso Muriel, Ignacio Cobeta
Objective To perform translation, cross-cultural adaptation, and validation of the Penn Acoustic Neuroma Quality-of-Life Scale (PANQOL) to the Spanish language. Study Design Prospective study. Setting Tertiary neurotologic referral center. Subjects and Methods PANQOL was translated and translated back, and a pretest trial was performed. The study included 27 individuals diagnosed with vestibular schwannoma. Inclusion criteria were adults with untreated vestibular schwannoma, diagnosed in the past 12 months...
January 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28116456/postoperative-imaging-of-the-internal-auditory-canal-visualization-of-active-auditory-implants
#6
I Todt, G Rademacher, P Mittmann, S Mutze, A Ernst
BACKGROUND: Assessment of the internal auditory canal (IAC) and cochlea is of central importance in neurotology. The artefacts and visibility of active auditory implants on magnetic resonance imaging (MRI) vary because of their specific magnetic components. Knowledge of the size of MRI artefacts and the options for handling them is important for the auditory rehabilitation of specific diseases (e. g., vestibular schwannoma). METHODS: The current article is a literature review...
January 23, 2017: HNO
https://www.readbyqxmd.com/read/28047111/su-f-t-611-critical-analysis-and-efficacy-of-linac-based-beam-modulator-and-cyberknife-treatment-plans-for-acoustic-neuroma-schwannoma
#7
Karrthick Kp, T Kataria, R Thiyagarajan, T Selvan, A Abhishek
PURPOSE: To study the critical analysis and efficacy of Linac and Cyberknife (CK) treatment plans for acoustic neuroma/schwannoma. METHODS: Twelve of acoustic neuroma/schwannoma patients were taken for these study that. Treatment plans were generated in Multiplan treatment planning system (TPS) for CK using 5,7.5 and 10mm diameter collimators. Target volumes were in the range of 0.280 cc to 9.256 cc. Prescription dose (Rx) ranges from 1150cGy to 1950cGy delivered over 1 to 3 Fractions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046895/su-f-t-648-sharpening-dose-fall-off-via-beam-number-enhancements-for-stereotactic-brain-radiosurgery
#8
J Chiu, M Pierce, S Braunstein, M McDermott, P Sneed, L Ma
PURPOSE: Sharp dose fall-off is the hallmark of brain radiosurgery to deliver a high dose of radiation to the target while minimizing dose to normal brain tissue. In this study, we developed a technique for the purpose of enhancing the peripheral dose gradient by magnifying the total number of beams focused toward each isocenter via patient head tilt and simultaneous beam intensity modulations. METHODS: Computer scripting for the proposed beam number enhancement (BNE) technique was developed...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28017747/complications-and-management-of-large-intracranial-vestibular-schwannomas-via-the-retrosigmoid-approach
#9
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 patients with large unilateral VS from the collected database (1999-2013) who underwent microsurgical resection as their initial treatment for histopathologically confirmed VS. Tumors larger than 30 × 20 mm were defined as large...
March 2017: World Neurosurgery
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
#10
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/27921114/-postoperative-imaging-of-the-internal-auditory-canal-visualization-of-active-auditory-implants-german-version
#11
I Todt, G Rademacher, P Mittmann, S Mutze, A Ernst
BACKGROUND: Assessment of the internal auditory canal (IAC) and the cochlea is of central importance in neurotology. The artefacts and visibility of the different types of active auditory implants in MRI vary, due to their specific ferromagnetic components. Knowledge of the size of MRI artefacts and the options for handling these is important for the auditory rehabilitation of specific diseases (e. g., vestibular schwannoma). METHODS: The current paper is a literature review RESULTS: MRI assessment of the IAC and cochlea after surgical placement of an active auditory implant is feasible only with a percutaneous bone-anchored hearing aid (BAHA, Ponto)...
December 5, 2016: HNO
https://www.readbyqxmd.com/read/27858100/-early-acoustic-evoked-potentials-in-patients-with-small-vestibular-schwannomas
#12
I Baljić, E Börner-Lünser, D Eßer, O Guntinas-Lichius
BACKGROUND: The prognostic potential of click-evoked early acoustic evoked potentials (EAEP) for vestibular schwannoma (VS) diagnostics is considered insufficient for tumors small than approximately <1.5 cm in diameter. However, up until now, the derivations at higher sound pressure levels have mainly been used for EAEP evaluation. The aim of this study was to examine whether registered EAEP are more sensitive to pathological changes at low sound pressure levels and with smaller tumors...
November 17, 2016: HNO
https://www.readbyqxmd.com/read/27815992/contralateral-hearing-loss-and-facial-palsy-in-an-operated-case-of-vestibular-schwannoma-case-report
#13
Abhijit Warade, Pawan Chawla, Anshu Warade, Ketan Desai
INTRODUCTION: Contralateral ear hearing loss (CHL) is an extremely rare but a potentially devastating complication in a patient with already compromised hearing due to a Vestibular schwannoma (VS). Our patient had CHL accompanied by contralateral facial palsy. Our case is only the second case reported in literature to the best of our knowledge. PRESENTATION OF CASE: A 55-year elderly male presented with right sided sensorineural hearing loss, cerebellar signs and Grade II House & Brackmann (H&B) facial nerve weakness for last1-year...
2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27755456/diagnostic-criteria-for-detection-of-vestibular-schwannomas-in-the-va-population
#14
Israel Pena, Erin Y Chew, Barcleigh P Landau, Joseph T Breen, Jose P Zevallos, Jeffrey T Vrabec
OBJECTIVE: To investigate the prevalence of vestibular schwannoma (VS) and asymmetric sensorineural hearing loss in the Veterans Administration hospital population and analyze a more efficient method of diagnosing VS in a population with significant noise exposure. STUDY DESIGN: Retrospective review of South Central (VISN 16) Veterans Administration hospitals. METHODS: Record query for ICD-9 codes for asymmetric sensorineural hearing loss or VS between 1999 and 2012...
December 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27738538/neurofibromatosis-type-2-presenting-with-oculomotor-ophthalmoplegia-and-distal-myopathy
#15
Jessica Mani Penny Tevaraj, Evelyn Tai Li Min, Raja Azmi Mohd Noor, Azhany Yaakub, Wan Hazabbah Wan Hitam
Neurofibromatosis type 2 usually presents with bilateral acoustic schwannomas. We highlight the rare presentation of neurofibromatosis initially involving third nerve. A 23-year-old Malay female presented with left eye drooping of the upper lid and limitation of upward movement for 8 years. It was associated with right-sided body weakness, change in voice, and hearing disturbance in the right ear for the past 2 years. On examination, there was mild ptosis and limitation of movement superiorly in the left eye...
2016: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/27675473/inherent-functional-dependence-among-cochlear-dose-surrogates-for-stereotactic-radiosurgery-of-acoustic-schwannomas
#16
L Ma, S E Braunstein, P Theodosopoulos, M W McDermott, P K Sneed
No abstract text is available yet for this article.
October 1, 2016: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/27593888/simultaneous-translabyrinthine-tumor-removal-and-cochlear-implantation-in-vestibular-schwannoma-patients
#17
Jin Won Kim, Ji Hyuk Han, Jin Woong Kim, In Seok Moon
Refinement of surgical techniques has allowed hearing preservation after tumor resection to be prioritized. Moreover, restoration of hearing after tumor removal can be attempted in patients with bilateral vestibular schwannomas or those with a schwannoma in the only-hearing ear. Cochlear implantation (CI) has emerged as a proper method of acoustic rehabilitation, provided that the cochlear nerve remains intact. Studies of electrical promontory stimulation in patients after vestibular schwannoma resection have demonstrated favorable results...
November 2016: Yonsei Medical Journal
https://www.readbyqxmd.com/read/27593791/unilateral-acoustic-neuromas-in-childhood-without-evidence-of-neurofibromatosis-experience-in-10-patients-at-a-single-institute
#18
Luxin Yin, Zhenyu Ma, Chunde Li, Shiqi Luo
AIM: We investigated the clinical presentation and management issues of unilateral vestibular schwannomas in childhood without evidence of neurofibromatosis. MATERIAL AND METHODS: Ten pediatric patients with unilateral vestibular schwannomas and no evidence of neurofibromatosis were treated by the senior author at Tiantan Hospital from January 1994 to December 2014. The clinical manifestations, neuroimaging findings, treatment methods, and therapeutic results were retrospectively reviewed...
December 28, 2015: Turkish Neurosurgery
https://www.readbyqxmd.com/read/27565388/the-fully-endoscopic-acoustic-neuroma-surgery
#19
REVIEW
Daniele Marchioni, Marco Carner, Alessia Rubini, João Flávio Nogueira, Barbara Masotto, Matteo Alicandri-Ciufelli, Livio Presutti
Surgical approaches to vestibular schwannomas (VS) are widely known and extensively recorded. For the first time, an exclusive endoscopic approach to the internal acoustic canal (IAC) was described and used to safely remove a cochlear schwannoma involving IAC in March 2012. The aim of this article was to summarize indications and technique to treat intracanalicular VS by transcanal/transpromontorial endoscopic approach. Because management of intracanalicular VSs is complex and strongly debated, this kind of therapeutic option in the appropriate and selected cases could modify classic concepts of the management of this pathology...
October 2016: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/27526562/-hypofractionated-radiosurgery-for-benign-brain-lesions-the-best-of-all-worlds
#20
REVIEW
Or Cohen-Inbar
Despite advances in neurosurgical technique, postoperative morbidity continues to taint open complete removal of many benign cranial base tumors (meningioma, pituitary adenomas, schwannomas). The incidence of temporary and permanent cranial nerve deficits is reported to be as high as 44% and 56% respectively, with postoperative mortality rates as high as 9%. As a consequence, many neurosurgeons choose to perform partial resections in order to preserve neurological functions. Progression rates after partial removal of a meningioma with no radiosurgery have been reported to be as high as 70%, compared to > 90% post-radiosurgical progression free survival rates...
May 2016: Harefuah
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