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trigeminal schwannoma

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https://www.readbyqxmd.com/read/29135804/surgical-management-of-tumors-involving-meckel-s-cave-and-cavernous-sinus-role-of-an-extended-middle-fossa-and-lateral-sphenoidectomy-approach
#1
Daniel Q Sun, Arnold H Menezes, Matthew A Howard, Bruce J Gantz, David M Hasan, Marlan R Hansen
OBJECTIVE: To study the indications and outcomes of lateral sphenoidectomy as part of a combined skull base approach in the treatment of tumors involving Meckel's cave (MC) and cavernous sinus (CS). STUDY DESIGN: Retrospective patient series. SETTING: Tertiary referral center. PATIENTS: Twenty-two consecutive patients (mean age: 45 yr, range: 16-76) who underwent transzygomatic, extended middle fossa approaches for tumors involving MC and CS...
November 13, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29129769/retrosigmoid-intradural-suprameatal-inframeatal-approach-for-complete-surgical-removal-of-a-giant-recurrent-vestibular-schwannoma-with-severe-petrous-bone-involvement-technical-case-report
#2
Yosuke Sato, Tohru Mizutani, Katsuyoshi Shimizu, Hans-Joachim Freund, Madjid Samii
BACKGROUND: Surgical removal of giant vestibular schwannomas with severe petrous bone involvement remains challenging due to the high risk of complications. The retrosigmoid intradural suprameatal-inframeatal approach (RISIA) allows for safe exposure extending from Meckel's cave to the petrous internal carotid artery (ICA). CLINICAL DESCRIPTION: A 27-year-old man presented with recurrence of a giant vestibular schwannoma (4.5 cm) invading Meckel's cave and the left petrous ICA...
November 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29107410/contralateral-trigeminal-neuralgia-in-a-rapidly-growing-vestibular-schwannoma-a-case-report
#3
Youngbeom Seo, Dong Gyu Kim
We present a rare case of vestibular schwannoma (VS) with contralateral trigeminal neuralgia. A 59 year-old woman presented with right-sided trigeminal neuralgia and a small VS in the left cerebellopontine angle (CPA) that was found via magnetic resonance imaging. The patient was administered medication; however, her symptoms gradually aggravated, and the size of the tumor increased. Two years after the initial diagnosis, the patient underwent surgical resection. After surgical resection, the patient's facial pain was improved...
October 26, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29080147/non-invasive-intraoperative-monitoring-of-cochlear-function-by-cochlear-microphonics-during-cerebellopontine-angle-surgery
#4
Blandine Lourenço, Béatriz Madero, Stéphane Tringali, Xavier Dubernard, Toufic Khalil, André Chays, Arnaud Bazin, Thierry Mom, Paul Avan
In vestibular-schwannoma (VS) surgery, hearing-preservation rate remains low. Besides damage to the cochlear nerve, intraoperative cochlear ischemia is a potential cause of hearing loss. Here, we used non-invasive cochlear microphonic (CM) recordings to detect the cochlear vascular events of VS surgery. Continuous intraoperative CM monitoring, in response to 80-95 dB SPL, 1-kHz tone-bursts, was performed in two samples of patients undergoing retrosigmoid cerebellopontine-angle surgery: one for VS (n = 31) and one for vestibular neurectomy or vasculo-neural conflict causing intractable trigeminal neuralgia, harmless to hearing (n = 19, control group)...
October 27, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29066124/population-based-study-of-stereotactic-radiosurgery-or-fractionated-stereotactic-radiation-therapy-for-vestibular-schwannoma-long-term-outcomes-and-toxicities
#5
Andrea Lo, Gareth Ayre, Roy Ma, Fred Hsu, Ryojo Akagami, Michael McKenzie, Boris Valev, Ermias Gete, Isabelle Vallieres, Alan Nichol
PURPOSE: To examine long-term local control of vestibular schwannoma and side effects in patients treated with stereotactic radiosurgery (SRS) and fractionated stereotactic radiation therapy (SRT) in British Columbia. METHODS AND MATERIALS: From August 1998 to May 2009, 207 patients were treated with radiation therapy (RT) at British Columbia Cancer Agency. 136 (66%) received SRS, and 71 (34%) received SRT. Dose prescriptions were 50 Gy/25 fractions for SRT and 12 Gy/1 fraction for SRS...
September 18, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28984523/retreatment-of-vestibular-schwannoma-with-gamma-knife-radiosurgery-clinical-outcome-tumor-control-and-review-of-literature
#6
Victor X Fu, Jeroen B Verheul, Guus N Beute, Sieger Leenstra, Henricus P M Kunst, Jef J S Mulder, Patrick E J Hanssens
OBJECTIVE Gamma Knife radiosurgery (GKRS) has become an accepted treatment for vestibular schwannoma, with a high rate of tumor control and good clinical outcome. In a small number of cases, additional treatment is needed. This retrospective study examines the clinical outcome, reproducibility of volumetric response patterns, and tumor control rate after administering a second GKRS to treat vestibular schwannomas. METHODS A total of 38 patients were included: 28 patients underwent a radiosurgical procedure as the initial treatment (Group 1), and 10 patients underwent microsurgical resection with adjuvant radiosurgery on the tumor remnant as the initial treatment (Group 2)...
October 6, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28983447/surgical-management-and-outcome-experience-of-53-cerebellopontine-angle-meningiomas
#7
Xiaosheng He, Weiping Liu, Yangang Wang, Jun Zhang, Buqing Liang, Jason H Huang
Background Meningiomas follow schwannomas as the second most common cerebellopontine angle (CPA) tumors. We investigate the diagnosis, management, and prognosis of this disease. Methods We reviewed the cases with the CPA meningiomas in our institution in Shaanxi, China from January 2012 to December 2015. Charts were retrospectively examined and patients were divided into two groups: 1) surgical treatment with a retrosigmoid approach for tumor resection and 2) stereotactic radiosurgery treatment only. Patients were followed up and outpatient records were also reviewed...
August 3, 2017: Curēus
https://www.readbyqxmd.com/read/28961901/parasellar-schwannomas-extradural-vs-extra-intradural-surgical-approach
#8
Giuseppe Mariniello, Oreste de Divitiis, Ferdinando Caranci, Flavia Dones, Francesco Maiuri
BACKGROUND: Schwannomas of the parasellar region may arise from the trigeminal, oculomotor, trochlear, and abducens nerves. OBJECTIVE: To define the tumor origin, location, and dural relationship (extradural vs extra-intradural vs cisternal) on preoperative magnetic resonance imaging (MRI), in order to plan the best surgical approach (purely extradural vs extra-intradural). METHODS: Twenty-four patients with parasellar schwannomas who underwent surgery were retrospectively analyzed...
August 22, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28945054/intracranial-stereotactic-radiosurgery
#9
Andrew A Fanous, Dheerendra Prasad, David Mathieu, Andrew J Fabiano
Stereotactic radiosurgery (SRS) is the use of a single high dose of radiation, stereotactically directed to an intracranial region of interest, in order to create a lesion or obliterate a preexisting one. This technology has evolved over the years into the use of multiple radiation sources oriented at a variety of angles, thus permitting the creation of various treatment target shapes. This allows for non-open surgical treatment of intracranial pathologies, which significantly decreases the risk of morbidity...
September 22, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28826715/predictive-factors-of-unfavorable-events-after-gamma-knife-radiosurgery-for-vestibular-schwannoma
#10
Ji Hee Kim, Hyun Ho Jung, Jong Hee Chang, Jin Woo Chang, Yong Gou Park, Won Seok Chang
OBJECTIVE: Gamma Knife radiosurgery (GKS) for the treatment of vestibular schwannoma (VS) introduces risks to the facial nerve and auditory perception and may involve post-treatment complications such as pseudoprogression, hydrocephalus, and other cranial neuropathies. This study of patients with VS who underwent GKS investigated radiosurgical results, focusing on post-treatment complications and identifying the factors that predict such complications. METHODS: We undertook a retrospective review of all VS patients treated with the Perfexion Leksell Gamma Knife between November 2007 and October 2010 at our institution...
November 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28758183/neuronavigation-guided-endoscopic-endonasal-excision-of-schwannoma-like-chordoma-of-the-meckel-s-cave-a-case-report
#11
Ali Akay, Sercan Göde, M Sedat Çağli
Chordomas are locally aggressive malignant tumors due to their recurrence potential, originating from the embryonic notochord remnants. Chordomas can originate anywhere on the axial skeleton. They are extradural and are spread by bone destruction. Chordomas are locally aggressive tumors which invade the dura mater, and may also present with secondary intradural growth. The Meckel's cave location of chordomas has been very rarely reported in the literature. Chordomas located in the Meckel's cave can be radiologically confused with trigeminal schwannomas...
June 14, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28717730/multicompartmental-trigeminal-schwannomas-dumbbell-tumors-revisited
#12
Abhishek Mahajan, Nilesh P Sable, Richa Vaish, Aliasgar Moiyadi, Supreeta Arya, Anil Keith D'Cruz
Multicompartmental trigeminal schwannomas (MTSs) are a rare and complex but treatable group of tumors. Herein, we describe the clinicoradiologic presentation of two patients with MTS. The two illustrated distinct case reports highlight the role of imaging and the outcome of two different types of MTS. The Discussion summarizes the literature to date, which will help the reader diagnose these tumors in a timely manner and manage them appropriately.
December 2016: Journal of Global Oncology
https://www.readbyqxmd.com/read/28707997/gamma-knife-radiosurgery-for-large-vestibular-schwannomas-greater-than-3-cm-in-diameter
#13
Cheng-Wei Huang, Hsien-Tang Tu, Chun-Yi Chuang, Cheng-Siu Chang, Hsi-Hsien Chou, Ming-Tsung Lee, Chuan-Fu Huang
OBJECTIVE Stereotactic radiosurgery (SRS) is an important alternative management option for patients with small- and medium-sized vestibular schwannomas (VSs). Its use in the treatment of large tumors, however, is still being debated. The authors reviewed their recent experience to assess the potential role of SRS in larger-sized VSs. METHODS Between 2000 and 2014, 35 patients with large VSs, defined as having both a single dimension > 3 cm and a volume > 10 cm(3), underwent Gamma Knife radiosurgery (GKRS)...
July 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28664009/orbital-abducens-nerve-schwannoma-a-case-report-and-review-of-the-literature
#14
Yu Iida, Katsumi Sakata, Natsuki Kobayashi, Junya Tatezuki, Hiroshi Manaka, Takashi Kawasaki
Intraorbital schwannoma is a rare tumor which accounts for about 1-2% of all neoplasms of the orbit. Orbital schwannomas most commonly arise from the sensory branches of the trigeminal nerve. On the other hand, intraorbital abducens nerve schwannomas are extremely rare, with a search of the English literature identifying only four cases of intraorbital abducens nerve schwannoma. This is the 5th reported case of an orbital schwannoma arising from the terminal branch of the abducens nerve to the lateral rectus muscle...
October 2016: NMC Case Rep J
https://www.readbyqxmd.com/read/28642183/giant-bicompartmental-cystic-tentorial-schwannoma-mimicking-a-meningioma
#15
Amandeep Kumar, Manmohan Singh, Mehar C Sharma, Poodipedi S Chandra, Bhawani S Sharma, Ashok K Mahapatra
BACKGROUND: Intracranial schwannomas most commonly arise from the vestibulocochlear nerve and less frequently from trigeminal, facial, and hypoglossal nerves. Intracranial schwannomas unrelated to cranial nerves are very rare; only approximately 50 cases have been reported in the literature. Tentorial schwannoma (TS) is even rarer, with only 13 cases reported to date. We present a rare case of giant TS. CASE DESCRIPTION: A 21-year-old man presented with generalized headache and dizziness for the past 6 months and worsening of symptoms for the past 2 months...
September 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28480107/clinical-features-microsurgical-treatment-and-outcome-of-vestibular-schwannoma-with-brainstem-compression
#16
Ali Harati, Kai-Michael Scheufler, Rolf Schultheiss, Albaraa Tonkal, Kamran Harati, Paul Oni, Thomas Deitmer
BACKGROUND: Presenting symptoms, treatment considerations, and outcome are strongly related to the extension of vestibular schwannomas (VS). The aim of the current retrospective study was to analyze the clinical features, microsurgical treatment, and outcome of VS with brainstem compression. METHODS: Forty-nine patients presented with VS (Hannover grading scale T4a or T4b) in our department. A subgroup analysis was performed among patients without (T4a) and with (T4b) compression and dislocation of the fourth ventricle...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28468211/symptomatic-trigeminal-neuralgia-caused-by-cerebellopontine-angle-tumors
#17
Pengfei Liu, Chenlong Liao, Wenxiang Zhong, Min Yang, Shiting Li, Wenchuan Zhang
To investigate the characteristics of symptomatic trigeminal neuralgia (TN) caused by tumors and the relationship between anatomicosurgical findings and tumor type, the authors undertook a retrospective review of 35 patients with symptomatic TN between 2006 and 2015. The tumors included 16 meningiomas, 14 epidermoids, 4 vestibular schwannomas, and 1 hemangioblastoma. The studies show that patients with tumor-induced TN were significantly younger than those idiopathic TN (P <0.05). Meningioma-induced TN tended to have responsible vessels, while epidermoid tumor seemed to cause TN by wrapping or compressing the nerve...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28439155/extracranial-trigeminal-schwannomas-a-retrospective-analysis
#18
Aviral Agrawal, Virendra Singh, Amrish Bhagol, Pradeep Kumar, Anjali Narwal
OBJECTIVE: To analyse the clinic-radiological features and treatment outcome of extracranial trigeminal schwannomas. METHOD: Medical records and radiographs of patients treated, from January 2011 to December 2013, for neurogenic tumors were retrospectively reviewed. Extracranial schwannomas other than those of trigeminal nerve were also excluded. A number of parameters, including the patient's age, gender, site, clinical features, radiographic features, histologic variants and treatment provided as well as any associated complications were recorded and analysed...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28434965/trochlear-schwannoma-presenting-with-isolated-trigeminal-neuralgia
#19
Cody L Nesvick, Avital Perry, Christopher S Graffeo, Aditya Raghunathan, Julie E Hammack, Jamie J Van Gompel
BACKGROUND: Schwannomas arising from the cranial nerves controlling extraocular eye movements are very rare and usually present with some degree of diplopia. CASE PRESENTATION: We report a 50-year-old woman who presented with isolated left-sided trigeminal neuralgia of 6 months' duration. Imaging demonstrated a homogeneously enhancing mass in the left ambient cistern, and the patient was brought to the operating room for resection. A retrosigmoid approach was used, and the mass was directly visualized arising from the trochlear nerve and compressing the dorsal root entry zone of the trigeminal nerve...
July 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28409393/stereotactic-radiosurgery-vs-fractionated-radiotherapy-for-tumor-control-in-vestibular-schwannoma-patients-a-systematic-review
#20
REVIEW
Oscar Persson, Jiri Bartek, Netanel Ben Shalom, Theresa Wangerid, Asgeir Store Jakola, Petter Förander
OBJECTIVE: Repeated controlled studies have revealed that stereotactic radiosurgery is better than microsurgery for patients with vestibular schwannoma (VS) <3 cm in need of intervention. In this systematic review we aimed to compare results from single-fraction stereotactic radiosurgery (SRS) to fractionated stereotactic radiotherapy (FSRT) for patients with VS. DATA SOURCES AND ELIGIBILITY CRITERIA: We systematically searched MEDLINE, Web of Science, Embase and Cochrane and screened relevant articles for references...
June 2017: Acta Neurochirurgica
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