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trigeminal schwannoma

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https://www.readbyqxmd.com/read/28642183/giant-bi-compartmental-cystic-tentorial-schwannoma-mimicking-a-meningioma
#1
Amandeep Kumar, Manmohan Singh, M C Sharma, P S Chandra, Bhawani S Sharma, Ashok K Mahapatra
BACKGROUND: Intracranial schwannomas most commonly arise from vestibulo-cochlear nerve and less frequently from trigeminal, facial and hypoglossal nerves. However, intracranial schwannomas unrelated to cranial nerves (ISUNs) are very rare and only ∼ 50 such cases have been reported in literature. Amongst these, tentorial schwannomas are even rarer and only 13 cases have been reported till date. We present one such rare case of giant tentorial schwannoma (TS). CASE DESCRIPTION: A 21 year old male patient presented to us with complaints of generalised headache and dizziness for past 6 months and worsening of symptoms for past 2 months...
June 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28480107/clinical-features-microsurgical-treatment-and-outcome-of-vestibular-schwannoma-with-brainstem-compression
#2
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
#3
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
#4
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
#5
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 DESCRIPTION: We report a 50-year-old woman who presented with isolated left-sided trigeminal neuralgia of six months' duration. Imaging demonstrated a homogeneously enhancing mass in the left ambient cistern, and the patient was taken to the operating room for resection. A retrosigmoid approach was used, and the mass was directly visualized arising from the trochlear nerve and compressing on the dorsal root entry zone of the trigeminal nerve...
April 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28409393/stereotactic-radiosurgery-vs-fractionated-radiotherapy-for-tumor-control-in-vestibular-schwannoma-patients-a-systematic-review
#6
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
#7
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
#8
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
#9
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
#10
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...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28134648/symptomatic-trigeminal-neuralgia-caused-by-cerebellopontine-angle-tumors
#11
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
#12
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
#13
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
#14
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
#15
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
https://www.readbyqxmd.com/read/27803960/fractionated-vs-single-fraction-stereotactic-radiotherapy-in-patients-with-vestibular-schwannoma-hearing-preservation-and-patients-self-reported-outcome-based-on-an-established-questionnaire
#16
Kerstin A Kessel, Hanna Fischer, Marco M E Vogel, Markus Oechsner, Henning Bier, Bernhard Meyer, Stephanie E Combs
BACKGROUND: Stereotactic radiotherapy (RT) has been established as a valid treatment alternative in patients with vestibular schwannoma (VS). There is ongoing controversy regarding the optimal fractionation. Hearing preservation may be the primary goal for patients with VS, followed by maintenance of quality of life (QoL). METHODS: From 2002 to 2015, 184 patients with VS were treated with radiosurgery (RS) or fractionated stereotactic radiotherapy (FSRT). A survey on current symptoms and QoL was conducted between February and June 2016...
March 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/27803834/surgical-approach-to-the-cavernous-sinus-for-a-trigeminal-schwannoma-resection-technical-note-and-case-report
#17
Riccardo Caruso, Alessandro Pesce, Venceslao Wierzbicki, Luigi Marrocco, Emanuele Piccione
We report a rare case of schwannoma of the lateral wall of the cavernous sinus, an exceedingly rare lesion affecting this anatomical district, and discuss salient aspects of the surgical approach to the cavernous sinus, which are traditionally considered technically challenging due to the high risk of postoperative morbidity and mortality related to the presence of the cranial nerves and internal carotid artery.
2016: Case Reports in Surgery
https://www.readbyqxmd.com/read/27777157/gamma-knife-radiosurgery-for-residual-and-recurrent-vestibular-schwannomas-after-previous-surgery-clinical-results-in-a-series-of-90-patients-and-review-of-the-literature
#18
Michele Bailo, Nicola Boari, Filippo Gagliardi, Alberto Franzin, Martina Piloni, Alfio Spina, Marco Gemma, Antonella Del Vecchio, Angelo Bolognesi, Pietro Mortini
OBJECTIVE: Complete removal of vestibular schwannomas (VS) is not always achievable without any risk of disabling postoperative complications, especially in terms of facial nerve function. Moreover, even after gross total removal, a relevant rate of recurrence has been reported. The aim of this study is to validate Gamma Knife radiosurgery (GKRS) as an effective strategy to treat tumor regrowth after previous surgery. METHODS: Ninety patients treated with GKRS for VS after previous microsurgery were included in the present study...
February 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27738538/neurofibromatosis-type-2-presenting-with-oculomotor-ophthalmoplegia-and-distal-myopathy
#19
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/27723656/jaw-immobilization-for-gamma-knife-surgery-in-patients-with-mandibular-lesions-a-newly-innovative-approach
#20
Constantin Tuleasca, Martin Broome, Pascal J Mosimann, Luis Schiappacasse, Michele Zeverino, Antoine Dorenlot, Jérôme Champoudry, Jean Régis, Marc Levivier
BACKGROUND: The purpose of our report is to describe an innovative system used for mandibular immobilization during Gamma Knife surgery (GKS) procedures. It is based on an approach originally developed in Marseille in extracranial lesions, close to or involving the mandible, which may imply a certain degree of movement during the therapeutic image acquisitions and/or GKS treatment. METHODS: The maxillofacial surgeon applied bone titanium self-tapping monocortical screws (4; 2 mm diameter, 10 mm length) between roots of the teeth in the fixed gingiva (upper and lower maxillae) the day before GKS (local anesthesia, 5-10 min time)...
2016: Stereotactic and Functional Neurosurgery
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