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trigeminal schwannoma

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https://www.readbyqxmd.com/read/28826715/predictive-factors-of-unfavorable-events-after-gamma-knife-radiosurgery-for-vestibular-schwannoma
#1
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...
August 4, 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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/28394552/multiple-intracranial-schwannomas-case-report
#12
Mario Mihalj, Krešimir Dolić, Pavao Jurinović, Nikolina Ivica Miše, Marina Titlić, Irena Pintarić
Schwannomas are benign encapsulated tumors arising from the sheaths of peripheral nerves. They present as slowly enlarging solitary lumps, which may cause neurological defects. Multiple schwannomas in non-neurofi bromatosis type 2 patients are extremely rare. We report a case of a 60-year-old female patient, without any family history of neurofibromatosis or schwannomatosis, presented with trigeminal neuralgia and progressive facial nerve palsy. Magnetic resonance imaging revealed the presence of acoustic schwannoma involving facial nerve and trigeminal schwannoma of the cisternal part of the nerve involving gasserian ganglion (Meckel’s cave)...
June 2016: Acta Clinica Croatica
https://www.readbyqxmd.com/read/28226086/syphilis-mimicking-trigeminal-schwannoma
#13
Gustavo L F Honorio, Samila O Silva, Marcos M Silva, Marco A Lima
No abstract text is available yet for this article.
February 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28203025/-trigemino-cardiac-reflex-in-skull-base-surgery
#14
H Z Duan, Y Zhang, L Li, J Y Zhang, Z Q Yi, S D Bao
OBJECTIVE: To explore the mechanism, clinical features, and prognosis of Trigemino-cardiac reflex (TCR) during skull base operations. METHODS: A retrospective analysis was performed on 291 patients with skull base disease from Jan. 2009 to Oct. 2015 in Peking University First Hospital. By reviewing the patients' operative data and anaesthetic electrical record, and we picked out all the patients who suffered from TCR during the operation and analyzed their surgical procedures, clinical features, influence factors, and prognosis...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28195750/dosimetric-analysis-of-neural-and-vascular-structures-in-skull-base-tumors-treated-with-stereotactic-radiosurgery
#15
Yarah M Haidar, Jay M Bhatt, Yaser Ghavami, Omid Moshtaghi, Amanda Schwer, Stafford Chenery, Hamid R Djalilian
Objective To examine the relationship between the prescribed target dose and the dose to healthy neurovascular structures in patients with vestibular schwannomas treated with stereotactic radiosurgery (SRS). Study Design Case series with chart review. Setting SRS center from 2011 to 2013. Subjects Twenty patients with vestibular schwannomas treated at the center from 2011 to 2013. Methods Twenty patients with vestibular schwannomas were included. The average radiation dose delivered to healthy neurovascular structures (eg, carotid artery, basilar artery, facial nerve, trigeminal nerve, and cochlea) was analyzed...
May 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28134648/symptomatic-trigeminal-neuralgia-caused-by-cerebellopontine-angle-tumors
#16
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...
January 27, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28128697/gamma-knife-radiosurgery-for-treatment-of-growing-vestibular-schwannomas-in-patients-with-neurofibromatosis-type-2-a-matched-cohort-study-with-sporadic-vestibular-schwannomas
#17
Ivo J Kruyt, Jeroen B Verheul, Patrick E J Hanssens, Henricus P M Kunst
OBJECTIVE Neurofibromatosis Type 2 (NF2) is a tumor syndrome characterized by an autosomal dominant pattern of inheritance. The hallmark of NF2 is the development of bilateral vestibular schwannomas (VSs), generally by 30 years of age. One of the first-line treatment options for small to medium-large VSs is radiosurgery. Although radiosurgery shows excellent results in sporadic VS, its use in NF2-related VS is still a topic of dispute. The aim of this study was to evaluate long-term tumor control, hearing preservation rates, and factors influencing outcome of optimally dosed, contemporary Gamma Knife radiosurgery (GKRS) for growing VSs in patients with NF2 and compare the findings to data obtained in patients with sporadic VS also treated by means of GKRS...
January 27, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28089525/radiotherapeutic-management-of-vestibular-schwannomas-using-size-and-location-adapted-fractionation-regimens-to-maximize-the-therapeutic-ratio
#18
Benjamin G Slane, Uma Goyal, Joel L Grow, Christopher Morrison, Craig R Hullett, 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...
May 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28043642/-maxillary-trigeminal-schwannoma-presentation-of-a-case-and-review-of-literature
#19
Alejandro Jacob Madrid-Sánchez, Carlos Castillo-Rangel, Myriam Leticia Contreras-Ayala, Edgardo Ruiz-García, Ana Karen Castillo-Castro, Ricardo Ramírez-Aguilar
INTRODUCTION: Schwannomas are benign tumours that are relatively common in the head, however the involvement of the sinunasal region is rare and there are only 5 cases reported in the maxilla in current literature, representing less than 1% of bone tumours. CLINICAL CASE: We report the case of a woman with a right maxillary schwannoma who underwent a complete resection of the lesion. Emphasis is placed on the rarity of the lesion in terms of its location and includes a review of clinical behaviour, diagnosis and current treatment options...
December 30, 2016: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28035290/pathological-location-of-cranial-nerves-in-petroclival-lesions-how-to-avoid-their-injury-during-anterior-petrosal-approach
#20
Hamid Borghei-Razavi, Ryosuke Tomio, Seyed-Mohammad Fereshtehnejad, Shunsuke Shibao, Uta Schick, Masahiro Toda, Kazunari Yoshida, Takeshi Kawase
Objectives Numerous surgical approaches have been developed to access the petroclival region. The Kawase approach, through the middle fossa, is a well-described option for addressing cranial base lesions of the petroclival region. Our aim was to gather data about the variation of cranial nerve locations in diverse petroclival pathologies and clarify the most common pathologic variations confirmed during the anterior petrosal approach. Method A retrospective analysis was made of both videos and operative and histologic records of 40 petroclival tumors from January 2009 to September 2013 in which the Kawase approach was used...
February 2016: Journal of Neurological Surgery. Part B, Skull Base
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