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https://www.readbyqxmd.com/read/28449512/primary-tracheal-schwannoma-treated-by-surgical-resection-a-case-report
#1
Ding-Pei Han, Jie Xiang, Zhi-Qiu Ye, Dan-Nong He, Xiao-Chun Fei, Chao-Fu Wang, Jia-Ming Che, Jun-Biao Hang, He-Cheng Li
The rarity and non-specific symptoms of benign primary tracheal tumors always leaded to misdiagnosis and delayed treatment, and also undefined the optimal treatment. In this case, a 45-year-old woman had a history of progressive shortness of breath and dry cough for several years, CT scan revealed an intra-luminal tracheal mass invaded the left side of tracheal wall. After being located by bronchoscope preoperatively, the tumor was removed by surgical resection. The tumor was 1.5 cm in diameter with intact capsule...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28447588/malignant-peripheral-nerve-sheath-tumour-of-the-oesophagus-review-of-the-literature-and-report-of-a-case-with-lymph-node-and-distant-metastases
#2
Vasileios K Mavroeidis, Kosmas Kandilaris, Dimitrios I Matthioudakis, Stavroula N Kaza, Panagis M Lykoudis, Francesca Saffioti, Maria Demonakou
Oesophageal sarcomas are very rare while various histological types have occasionally been reported. Malignant Peripheral Nerve Sheath Tumour (MPNST) of the oesophagus is an exceedingly rare type of oesophageal sarcoma with only thirteen cases previously reported in the world literature. However, it should be included in the differential diagnosis of oesophageal neoplasias. Due to the small number of reported cases, the information about the biological behaviour of this entity is still insufficient. While MPNST is generally considered an aggressive type of tumour with high recurrence rates after surgical treatment and poor prognosis, previous reports of cases with oesophageal localization have recorded satisfactory outcomes overall even with less aggressive therapeutic approaches, although a long-term follow-up is lacking...
2017: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/28447494/subtotal-resection-of-vestibular-schwannoma-evaluation-with-ki-67-measurement-magnetic-resonance-imaging-and-long-term-observation
#3
Giannicola Iannella, Marco de Vincentiis, Cira Di Gioia, Raffaella Carletti, Benedetta Pasquariello, Alessandra Manno, Diletta Angeletti, Ersilia Savastano, Giuseppe Magliulo
Purpose The aim of this study was to compare the postoperative clinical and radiological data of patients with vestibular schwannomas who were initially managed by near total resection (NTR) or subtotal resection (STR). The Ki-67 analysis results were compared with tumor regrowth to determine the presence of a correlation between this proliferative index and postoperative tumor regrowth. Study Design Seventeen adult patients (7 male, 10 female) were retrospectively reviewed. Nine (52.9%) and eight (47.1%) patients underwent NTR and STR, respectively...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28445126/clinical-features-and-surgical-treatment-of-sacral-schwannomas
#4
Weibo Pan, Zhan Wang, Nong Lin, Xin Huang, Meng Liu, Xiaobo Yan, Zhaoming Ye
BACKGROUND: Sacral schwannoma is relatively rare and both the early diagnosis and appropriate treatment of sacral schwannomas are equally very challenging. METHODS: 11 sacral schwannoma cases operated at the Second Affiliated Hospital, School of Medicine, Zhejiang University, from 2012 to 2016, were investigated retrospectively and 10 were followed up. All patients were assessed with X-ray, CT and MRI, and underwent an intralesional excision. RESULTS: One patient was male, nine were female and the average age was 48 (ranging between 31 and 63)...
April 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28443060/the-vestibular-implant-hearing-preservation-during-intralabyrinthine-electrode-insertion-a-case-report
#5
Raymond van de Berg, Florence Lucieer, Nils Guinand, Joost van Tongeren, Erwin George, Jean-Philippe Guyot, Herman Kingma, Marc van Hoof, Yasin Temel, Jacobus van Overbeeke, Angelica Perez-Fornos, Robert Stokroos
OBJECTIVE: The vestibular implant seems feasible as a clinically useful device in the near future. However, hearing preservation during intralabyrinthine implantation remains a challenge. It should be preserved to be able to treat patients with bilateral vestibulopathy and (partially) intact hearing. This case study investigated the feasibility of hearing preservation during the acute phase after electrode insertion in the semicircular canals. METHODS: A 40-year-old woman with normal hearing underwent a translabyrinthine approach for a vestibular schwannoma Koos Grade IV...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28441508/cyberknife-for-treatment-of-vestibular-schwannoma-a-meta-analysis
#6
Hossein Mahboubi, Ronald Sahyouni, Omid Moshtaghi, Kent Tadokoro, Yaser Ghavami, Kasra Ziai, Harrison W Lin, Hamid R Djalilian
Objectives (1) Perform a meta-analysis of the available data on the outcomes of CyberKnife radiosurgery for treatment of vestibular schwannomas (VSs) in the published English-language literature and (2) evaluate the collective outcomes of CyberKnife treatment with respect to tumor control and hearing preservation. Data Sources A thorough literature search of published English-language articles was performed in the PubMed, Ovid, and Cochrane databases. Review Methods A database search was conducted with the keywords "CyberKnife" and "vestibular schwannoma" or "acoustic neuroma...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28440459/hypoxia-induced-mir-210-promoter-demethylation-enhances-proliferation-autophagy-and-angiogenesis-of-schwannoma-cells
#7
Zhengguang Wang, Mingsi Deng, Zhendong Liu, Song Wu
Hypoxia, a dominant feature in cancer occurrence and evolution, exists throughout the progression of most malignant tumors. This study focused on the mechanism of hypoxia-induced miR-210 upregulation, and the miR-210 functions in schwannoma. We detected microvascular density, vascular endothelial growth factor (VEGF) and miR-210 expression levels using schwannoma tissue mciroarray. The results showed that miR-210 expression was significantly associated with VEGF. Moreover, the cytological tests showed that hypoxia induced miR-210 expression, while reduce ephrin-A3 expression...
May 2017: Oncology Reports
https://www.readbyqxmd.com/read/28439689/divergent-schwannoma-like-phenotype-in-a-pleomorphic-adenoma
#8
Srinivasa R Chandra, Farah Karim, Yeshwant B Rawal
The schwannoma-like pleomorphic adenoma is a rare histopathological variant of the pleomorphic adenoma. Five previous reports with seven cases exist in English language literature. These tumors present in the parotid gland most commonly. Intraparotid schwannomas of the facial nerve and schwannomas with glandular differentiation have also been reported. A 60-year-old male presented with an asymptomatic swelling over the left angle of the mandible. The swelling had been present for about 12 years with a recent increase in size...
April 24, 2017: Head and Neck Pathology
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 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/28430338/yap-taz-and-areg-expression-in-eighth-cranial-nerve-schwannoma
#11
Alessandro Martini, Gino Marioni, Elisabetta Zanoletti, Rocco Cappellesso, Roberto Stramare, Elena Fasanaro, Chiara Faccioli, Luciano Giacomelli, Luca Denaro, Domenico D'Avella, Antonio Mazzoni, Ambrogio Fassina
BACKGROUND: Although the diagnosis and treatment of eighth cranial nerve (VIII CN) schwannoma (acoustic neuroma) has improved over the years, no factors capable of predicting tumor growth have been identified as yet. This study is a preliminary investigation of the expression in sporadic VIII CN schwannomas of Yes-associated protein (YAP), transcriptional coactivator with PDZ-binding motif (TAZ), and amphiregulin (AREG), a direct target gene of YAP and TAZ. The expression of YAP, TAZ and AREG was correlated with the volumetric dimensions of tumors on contrast-enhanced magnetic resonance imaging (ceMRI)...
April 7, 2017: International Journal of Biological Markers
https://www.readbyqxmd.com/read/28428901/microcystic-reticular-schwannoma-of-the-frontal-lobe-an-unusual-occurrence
#12
Lauren Pearson, Erinc Akture, Julien Wonderlick, Gregory Fuller, Maryam Zenali
Schwannoma is a benign peripheral nerve sheath tumor that typically involves cranial nerves of the head and neck region. Intraparenchymal occurrence of this tumor is uncommon. Even rarer in this site is the microcystic/reticular pattern of schwannoma. This histologic variant, first described in 2008, has a predilection for visceral organs. Herein, we report the first case of microcystic/reticular schwannoma of the frontal lobe.
2017: Case Reports in Pathology
https://www.readbyqxmd.com/read/28427224/ponatinib-promotes-a-g1-cell-cycle-arrest-of-merlin-nf2-deficient-human-schwann-cells
#13
Alejandra M Petrilli, Jeanine Garcia, Marga Bott, Stephani Klingeman Plati, Christine T Dinh, Olena R Bracho, Denise Yan, Bing Zou, Rahul Mittal, Fred F Telischi, Xue-Zhong Liu, Long-Sheng Chang, D Bradley Welling, Alicja J Copik, Cristina Fernández-Valle
Neurofibromatosis type 2 (NF2) is a genetic syndrome that predisposes individuals to multiple benign tumors of the central and peripheral nervous systems, including vestibular schwannomas. Currently, there are no FDA approved drug therapies for NF2. Loss of function of merlin encoded by the NF2 tumor suppressor gene leads to activation of multiple mitogenic signaling cascades, including platelet-derived growth factor receptor (PDGFR) and SRC in Schwann cells. The goal of this study was to determine whether ponatinib, an FDA-approved ABL/SRC inhibitor, reduced proliferation and/or survival of merlin-deficient human Schwann cells (HSC)...
March 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28422417/cranial-irradiation-in-childhood-mimicking-neurofibromatosis-type-ii
#14
Felix Bokstein, Tom Dubov, Hagit Toledano-Alhadef, Rinat Bernstein-Molho, Shlomi Constantini, D Gareth Evans, Shay Ben-Shachar
Neurofibromatosis type II (NF2) is a genetic disease characterized by bilateral vestibular schwannomas (VS) and other nerve system tumors. However, such tumors may be associated with environmental, rather than a genetic, etiology. Individuals fulfilling the clinical criteria of NF2 who had been treated by head ionized irradiation at a young age were compared for disease characteristics and molecular analysis with non-irradiated sporadic NF2 cases. In the study cohort, three of 33 sporadic adult cases fulfilling NF2 diagnostic criteria had a history of early age cranial irradiation exposure...
April 19, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28421258/-intralabyrinthine-schwannomas-surgical-management-and-hearing-rehabilitation-with-cochlear-implants-german-version
#15
S K Plontke, T Rahne, M Pfister, G Götze, C Heider, N Pazaitis, C Strauss, P Caye-Thomasen, S Kösling
Intralabyrinthine schwannomas (ILS) are a rare differential diagnosis of sudden hearing loss and vertigo. In an own case series of 12 patients, 6 tumors showed an intracochlear, 3 an intravestibular, 1 a transmodiolar including the cerebello-pontine angle (CPA), 1 a transotic including the CPA and 1 a multilocular location. The tumors were removed surgically in 9 patients, whereas 3 patients opted for a "wait-and-test-and-scan" strategy. Of the surgical patients, 3 underwent labyrinthectomy and cochlear implant (CI) surgery in a single stage procedure; 1 patient received extended cochleostomy with CI surgery; 3 underwent partial or subtotal cochleoectomy, with partial cochlear reconstruction and CI surgery (n = 1) or implantation of electrode dummies for possible later CI following repeated MRI follow-up (n = 2); and in 2 patients, the tumors of the internal auditory canal and cerebellopontile angle exhibiting transmodiolar or transmacular growth were removed by combined translabyrinthine-transotic resection...
April 18, 2017: HNO
https://www.readbyqxmd.com/read/28420320/pediatric-non-vestibular-schwannoma
#16
Cory Broehm, Alyaa Al-Ibraheemi, Karen J Fritchie
While the clinicopathologic features of pediatric vestibular schwannomas, often in the context of neurofibromatosis type 2 (NF2), have been well studied, there is less data regarding the characteristics of pediatric non-vestibular schwannomas (NVS). Additionally, the rate of loss of SMARCB1/INI1 expression in this population has not been systematically evaluated. Our institutional archives were searched for cases of NVS arising in patients 18 years or younger. Clinicopathologic features including SMARCB1/INI1 status were assessed for each case...
January 1, 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28418275/factors-influencing-cochlear-patency-after-translabyrinthine-surgery
#17
Brian Rodgers, Emily Stucken, Aaron Metrailer, Eric Sargent
Objective To determine predictive factors for cochlear obliteration after translabyrinthine surgery for vestibular schwannoma. Study Design Case series with chart review. Setting Neurotology referral center. Subjects and Methods In total, 345 charts were reviewed, resulting in 103 patients who underwent translabyrinthine surgery between January 2010 and July 2015 and had postoperative magnetic resonance imaging (MRI) for review. Surveillance MRI performed after translabyrinthine resection of vestibular schwannomas was reviewed...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28414694/ipsilesional-nystagmus-induced-by-vibration-in-subjects-with-m%C3%A3-ni%C3%A3-re-s-disease-or-vestibular-schwannoma
#18
María Fernanda Vargas Gamarra, Claudio Krstulovic, Vanesa Pérez Guillén, Herminio Pérez-Garrigues
OBJECTIVE: To analyze the frequency in which vibration-induced nystagmus (VIN) with ipsilesional direction appears in subjects with Ménière's disease (MD) or vestibular schwannoma (VS). STUDY DESIGN: Cross-sectional study. SETTING: Tertiary referral center. PATIENTS: Fifty-two subjects with MD and 21 subjects with vestibular schwannoma. INTERVENTION: Videonystagmographic recordings of VIN at 30, 60, and 100 Hz...
April 14, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28414692/neuronal-fibers-and-neurotransmitter-receptor-expression-in-the-human-endolymphatic-sac
#19
Martin Nue Møller, Svend Kirkeby, Jonas Vikeså, Finn Cilius Nielsen, Per Cayé-Thomasen
INTRODUCTION: Recent studies suggest that the human endolymphatic sac (ES) may have multiple functions, including an ion-transport capacity comparable to the kidney, an immunological capacity and a possible natriuretic capacity. Further, there have been speculations of a yet undefined role in intracranial pressure homeostasis. The anatomical location towards the sigmoid sinus would suggest a possible endo- and/or paracrine signaling. However, neuronal connections may also apply, but it remains very scarcely explored in the human ES...
April 14, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28413620/case-report-sciatic-nerve-schwannoma-a-rare-cause-of-sciatica
#20
Sunil Munakomi, Pratyush Shrestha
Herein we report a rare case of a sciatic nerve schwannoma causing sciatica in a 69-year-old female. Sciatic nerve schwannoma is a rare entity. It should always be considered as a possible cause of sciatica in patients that present with symptoms of sciatica with no prolapsed disc in the lumbar spine and a negative crossed straight leg raise test. Timely diagnosis and complete excision of the lesion leads to complete resolution of the symptoms of such patients.
2017: F1000Research
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