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Cerebellopontine angle

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https://www.readbyqxmd.com/read/28879895/perfusion-mr-imaging-of-enhancing-brain-tumors-comparison-of-arterial-spin-labeling-technique-with-dynamic-susceptibility-contrast-technique
#1
Neetu Soni, Devender Pal S Dhanota, Sunil Kumar, Awadhesh K Jaiswal, Arun K Srivastava
OBJECTIVE: Arterial spin labeling (ASL) magnetic resonance (MR) perfusion is a noninvasive and repeatable method for quantitatively measuring cerebral blood flow (CBF). This study aims to compare measurements of ASL-derived CBF with dynamic susceptibility contrast (DSC) MRI in the assessment of enhancing brain tumors (primary and metastatic), with an aim to use ASL as an alternative to DSC. MATERIALS AND METHODS: Thirty patients with newly diagnosed brain tumors (16 meningiomas, 6 gliomas, 3 metastases, 2 cerebellopontine angle schwannoma, 1 central neurocytoma, and 2 low-grade gliomas) were examined using a 3T MR scanner...
September 2017: Neurology India
https://www.readbyqxmd.com/read/28875382/-tumors-of-the-inner-ear-and-adjacent-structures
#2
REVIEW
J Schittenhelm
Tumors of the inner ear and adjacent structures often present with hearing loss, tinnitus and vertigo due to compression of the traversing cranial nerves. More than 90% of the tumors of the inner ear with or without expansion into the cerebellopontine angle are histologically diagnosed as vestibular schwannomas. Less common tumorous lesions include ectopic meningiomas located in the petrous bone, glomus tympanicum paragangliomas or endolymphatic sac tumors (ELST) originating in the vestibular recess. Most tumors are sporadic, but hereditary disorders have to be considered...
September 5, 2017: Der Pathologe
https://www.readbyqxmd.com/read/28868198/malignant-squamous-cell-carcinoma-arising-in-a-previously-resected-cerebellopontine-angle-epidermoid
#3
Annika Mascarenhas, Alyssa Parsons, Caroline Smith, Cindy Molloy, Alistair Jukes
BACKGROUND: Malignant squamous cell differentiation of an epidermoid cyst can carry a significantly poor prognosis and very little is known about this entity. CASE DESCRIPTION: We present the case of a 35-year-old lady, with primary malignant squamous cell carcinoma (SCC) arising from a previously partially resected cerebellopontine angle epidermoid cyst almost 5 years after initial resection. We also review the relevant literature. CONCLUSION: The imaging findings, histopathology, and management of a malignant SCC arising from a benign epidermoid cyst are discussed with recommendation for increased surveillance and follow-up, even for classically accepted benign lesions...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28866065/intradural-chordoma-of-the-cerebellopontine-angle-case-report-and-review
#4
Amir Goodarzi, Atrin Toussi, Mirna Lechpammer, Darrin Lee, Kiarash Shahlaie
No abstract text is available yet for this article.
August 30, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28838112/endoscopic-endonasal-surgery-for-cranial-base-chondrosarcomas
#5
Francisco Vaz-Guimaraes, Juan C Fernandez-Miranda, Maria Koutourousiou, Ronald L Hamilton, Eric W Wang, Carl H Snyderman, Paul A Gardner
BACKGROUND: Microsurgical resection via open approaches is considered the main treatment modality for cranial base chondrosarcomas (CBCs). The use of endoscopic endonasal approaches (EEAs) has been rarely reported. OBJECTIVE: To present the endoscopic endonasal experience with CBCs at our institution. METHODS: Retrospective review of the medical records of 35 consecutive patients who underwent EEA for CBC resection between January 2004 and April 2013...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28820301/translabyrinthine-microsurgical-resection-of-small-vestibular-schwannomas
#6
Marc S Schwartz, Gregory P Lekovic, Mia E Miller, William H Slattery, Eric P Wilkinson
OBJECTIVE Translabyrinthine resection is one of a number of treatment options available to patients with vestibular schwannomas. Though this procedure is hearing destructive, the authors have noted excellent clinical outcomes for patients with small tumors. The authors review their experience at a tertiary acoustic neuroma referral center in using the translabyrinthine approach to resect small vestibular schwannomas. All operations were performed by a surgical team consisting of a single neurosurgeon and 1 of 7 neurotologists...
August 18, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28730571/early-trigeminal-nerve-involvement-in-listeria-monocytogenes-rhombencephalitis-case-series-and-systematic-review
#7
William K Karlsson, Zitta Barrella Harboe, Casper Roed, Jeppe B Monrad, Mette Lindelof, Vibeke Andrée Larsen, Daniel Kondziella
Listeria monocytogenes is associated with rhombencephalitis. However, the exact mechanisms of brainstem invasion remains poorly understood. Here, we demonstrate clinical and radiological data suggesting that Listeria may invade the brainstem via the trigeminal nerve. Three females (41, 64 and 70 years) with culture proven L. monocytogenes bacteremia and rhombencephalitis were investigated in the period of 2014-16. T2-weighted and contrast-enhanced T1-weighted MRI revealed a cerebellopontine abscess in all three patients, including the involvement of the trigeminal nerve root...
July 20, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28725513/facial-nerve-schwannomas-mimicking-as-vestibular-schwannomas
#8
Beth N McNulty, Sean Wise, David S Cohen, Jason Bell, Dennis Bojrab, Michael LaRouere, Matthew Kircher, Seilesh Babu
Objective  The objective of this study was to identify preoperative and intraoperative findings that may aid in distinguishing facial nerve schwannomas (FNS) from vestibular schwannomas (VSs), particularly in cases limited to the internal auditory canal (IAC) and cerebellopontine angle (CPA). Study Design  This was a retrospective study. Setting  This study was set at a Tertiary Referral Center. Patients  Seventeen cases from October 2002 to July 2015 with an IAC/CPA mass presumed to be a VS who were found to have a FNS intraoperatively...
August 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28716765/sporadic-endolymphatic-sac-tumor-a-very-rare-cause-of-hearing-loss-tinnitus-and-dizziness
#9
Didde Trærup Schnack, Katalin Kiss, Søren Hansen, Hidemi Miyazaki, Birgitte Bech, Per Caye Thomasen
Sporadic endolymphatic sac tumor is a very rare neoplasm. It is low malignant, locally destructive and expansive, but non-metastasizing. The tumor is very rare in the sporadic form, but more often associated with Von Hippel-Lindau disease. A 65-year old man with left sided tinnitus and hearing loss for several months. Audiometry showed an asymmetrical sensory neural hearing loss on the left side up to 60 dB. The speech discrimination score was 46% and stapedial reflexes were absent. Several years earlier, he had suffered from periods of dizziness...
August 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28700967/eosinophilic-granuloma-at-the-cerebellopontine-angle-in-an-adult-a-rare-case-report-and-literature-review
#10
Arash Safarian, Nima Derakhshan, Mousa Taghipour, Amirreza Dehghanian
INTRODUCTION: Langerhans cell histiocytosis (LCH) is a rare immunologic disorder, identified by immature proliferation of histiocytes which may present as systemic or focal lesions. Eosinophilic granuloma (EG) is localized from of LCH mainly involving bones such as skull, femur, spine, ribs, mandible and pelvis. Cerebello-pontine (CP) angle is a rare anatomic location for involvement by EG. PRESENTATION OF CASE: A 32 year old man was being evaluated in our neuro-oncology clinic due to diplopia since 4 months ago...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28676975/a-comprehensive-review-of-the-foramina-of-luschka-history-anatomy-embryology-and-surgery
#11
REVIEW
Jaspreet Johal, Phillip Barrett Paulk, Peter C Oakes, Rod J Oskouian, Marios Loukas, R Shane Tubbs
PURPOSE: The purpose of this review is to comprehensively review the foramina of Luschka in regard to their discovery, embryology, anatomy, and surgical relevance. METHODS: This subject review of the foramina of Luschka was composed after conducting a thorough review of the available literature on this topic using PubMed and other primary sources. RESULTS: The foramina of Luschka are paired apertures located in the lateral recesses of the fourth ventricle, within the posterior cranial fossa...
July 4, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28673659/joseph-jumenti%C3%A3-1879-1928-a-forgotten-neurologist
#12
REVIEW
O Walusinski
Joseph Jumentié (1879-1928), through his clinical skill and expertise in anatomical pathology, enhanced the prestige of the master neurologists he studied under- Jules Dejerine, Augusta Dejerine-Klumpke and Joseph Babiński -and their fame overshadowed the crucial support that Jumentié provided them. Following a remarkable doctoral thesis in 1911, which defined the semiology of tumors in the cerebellopontine angle, Jumentié conducted research into various areas of neurology and authored numerous publications...
June 30, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/28665390/-surgical-treatment-of-acoustic-neuromas-vestibular-schwannomas
#13
V N Shimanskiy, S V Tanyashin, K V Shevchenko, D A Odamanov
Clinical guidelines are topical systematically developed provisions designed to help the doctor make a decision about a treatment approach in certain clinical situations; they provide information on conducting diagnostic and screening tests, the amount of medical and surgical care, and other aspects of clinical practice. Vestibular schwannomas account for 8% of all intracranial lesions, up to 30% of posterior cranial fossa tumors, and 85% of cerebellopontine angle tumors. The incidence rate of acoustic neuromas is approximately 1 case per 100000 population per year...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28664238/intralabyrinthine-schwannomas-surgical-management-and-hearing-rehabilitation-with-cochlear-implants
#14
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 cerebellopontine angle (CPA), 1a transotic including the CPA, and 1 a multilocular location. The tumors were removed surgically in 9 patients, whereas 3 patients decided 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 had 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 after repeated MRI follow-up (n = 2); and in 2 patients, the tumors of the internal auditory canal and cerebellopontine angle exhibiting transmodiolar or transmacular growth were removed by combined translabyrinthine-transotic resection...
June 29, 2017: HNO
https://www.readbyqxmd.com/read/28654042/a-unified-methodological-framework-for-vestibular-schwannoma-research
#15
Lukas D Landegger, Jessica E Sagers, Sonam Dilwali, Takeshi Fujita, Mehmet I Sahin, Konstantina M Stankovic
Vestibular schwannomas are the most common neoplasms of the cerebellopontine angle, making up 6-8% percent of all intracranial growths. Though these tumors cause sensorineural hearing loss in up to 95% of affected individuals, the molecular mechanisms underlying this hearing loss remain elusive. This article outlines the steps established in our laboratory to facilitate the collection and processing of various primary human tissue samples for downstream research applications integral to the study of vestibular schwannomas...
June 20, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28645591/surgical-repair-of-iatrogenic-transverse-sigmoid-sinus-laceration-with-a-dural-flap-during-skull-base-tumor-surgery-a-technical-case-report
#16
Gerald S Oh, Gregory D Arnone, Hussam Abou-Al-Shaar, Ashley L Barks, Andrew Wong, Fady T Charbel
BACKGROUND: Injury to cerebral venous sinuses during craniotomy procedures can cause significant blood loss or venous air embolism potentially leading to serious morbidity or mortality. When iatrogenic sinus injuries occur, it is essential to promptly obtain hemostasis and repair the sinus defect. CASE DESCRIPTION: The authors report a 43-year-old female that sustained a transverse-sigmoid sinus injury during a retrosigmoid craniotomy for resection of a cerebellopontine angle meningioma...
June 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28644257/holmes-tremor-secondary-to-cerebellopontine-angle-epidermoid-cyst
#17
Sanjay Pandey
Holmes' tremor is characterized by a combination of rest, postural, and intention tremor. Tremor is predominantly proximal and more severe during posture; however, the tremor frequency is usually <4 Hz on surface electromyography. We report Holmes' tremor in a patient secondary to cerebellopontine angle epidermoid cyst.
July 2017: Neurologist
https://www.readbyqxmd.com/read/28637207/the-use-of-semitranslucent-rubber-pledgets-during-microsurgical-dissection-of-cerebellopontine-angle-tumors-technical-note
#18
Marcus D Mazur, Richard Gurgel, Joel D MacDonald
BACKGROUND AND IMPORTANCE: Dissection of cerebellopontine angle (CPA) tumors that abut or adhere to the brainstem or cranial nerves can be a challenging surgical endeavor. We describe the use of semitranslucent latex rubber pledgets in the tumor-brain interface as a method to improve visualization and protection of vital tissue during microsurgical dissection of CPA masses. The rubber pledgets are fashioned by cutting circular discs out of the cuff portion of talc-free, partially opaque latex gloves...
June 20, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28631535/high-resolution-magnetic-resonance-imaging-for-exposing-facial-nerve-zonal-vulnerability-to-microbleeds-a-rare-cause-of-facial-palsy
#19
Charlie Chia-Tsong Hsu, Dalveer Singh, Trevor William Watkins, Gigi Nga Chi Kwan, Sachintha Hapugoda
Background We report a case of hypertensive microbleeds strategically located at the attached segment (AS) and root entry zone (REZ) at the left facial nerve causing facial paralysis. Case Report A 60-year-old woman presented with sudden onset left facial paralysis. Medical history was significant for poorly controlled hypertension secondary to bilateral adrenal hyperplasia (primary hyperaldosteronism). The patient was initially treated for presumptive Bell's palsy. Subsequent magnetic resonance imaging of the brain and internal auditory canal showed two microbleeds at the left cerebellopontine angle...
August 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28627983/susceptibility-weighted-imaging-a-problem-solving-tool-in-differentiation-of-cerebellopontine-angle-schwannomas-and-meningiomas
#20
Atul Mishra, Bejoy Thomas, T R Kapilamoorthy
Background and purpose Vestibular schwannomas and meningiomas of the cerebellopontine angle can be differentiated by the presence of foci of blooming on susceptibility weighted imaging. Materials and methods In this retrospective study, magnetic resonance imaging with susceptibility weighted imaging sequence in addition to other routine sequences was done in 73 patients. All the cases were studied for the presence of foci of blooming within the tumor on susceptibility weighted imaging. Histopathological examination confirmed the diagnosis in all cases...
June 2017: Neuroradiology Journal
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