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Cerebellopontine angle

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https://www.readbyqxmd.com/read/29348291/bruns-nystagmus-an-important-clinical-clue-for-cerebellopontine-angle-tumours
#1
Sugata Narayan Biswas, Sudip Ray, Somedeb Ball, Partha Pratim Chakraborty
No abstract text is available yet for this article.
January 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29346659/case-report-facial-nerve-bifurcation-noted-during-resection-of-vestibular-schwannoma
#2
Jennifer D Sokolowski, Douglas S Ruhl, Bradley W Kesser, Ashok R Asthagiri
BACKGROUND AND IMPORTANCE: Resection of cerebellopontine angle tumors is challenging because the proximity of the facial nerve puts it at risk of inadvertent injury and subsequent dysfunction. It is critical to consider variations in anatomy and be aware of the potential deviations in the course of the nerve in order to avoid damage. CLINICAL PRESENTATION: We present a case of a facial nerve bifurcation identified during resection of a vestibular schwannoma. CONCLUSION: This is the only reported case of proximal facial nerve bifurcation...
January 13, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29343821/focal-hyperintensity-in-the-dorsal-brain-stem-of-patients-with-cerebellopontine-angle-tumor-a-high-resolution-3%C3%A2-t-mri-study
#3
Hirotaka Yamamoto, Atsushi Fujita, Taichiro Imahori, Takashi Sasayama, Kohkichi Hosoda, Ken-Ichi Nibu, Eiji Kohmura
Focal hyperintensity (FHI) in the dorsal brain stem on T2-weighted images of patients with cerebellopontine angle (CPA) tumor was thought to indicate degeneration of the vestibular nucleus and to be specific to vestibular schwannoma. The purpose of this study was to evaluate FHI by using high-resolution 3 Tesla magnetic resonance imaging (3 T MRI) and the relation to clinical characteristics. We retrospectively reviewed the clinical data and MRI of 45 patients with CPA tumors (34 vestibular schwannomas and 11 other tumors)...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339320/primary-obstruction-of-the-foramen-of-luschka-anatomy-histology-and-clinical-significance
#4
Laszlo Barany, Gabor Baksa, Patonay Lajos, Gergely Racz, Oliver Ganslandt, Michael Buchfelder, Peter Kurucz
BACKGROUND: The foramen of Luschka is a natural aperture between the fourth ventricle and the subarachnoid space at the cerebellopontine angle (CPA). Membranous closure of this foramen is referred to as primary obstruction. The available information about this variant and its role in the development of the cysts of the posterior fossa are contradictory in the literature. METHODS: Sixty-one formalin-fixed human brains (122 foramina) were involved in this study. Both the macroscopic and the histological features of the obstructed foramina were examined...
January 12, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29334768/angular-and-metric-analysis-of-the-neural-structures-in-the-cerebellopontine-angle
#5
Helbert de Oliveira Manduca Palmiero, Marcos Devanir Silva da Costa, Ricardo Lourenço Caramanti, Feres Eduardo Aparecido Chaddad-Neto
INTRODUCTION: The cerebellopontine angle (CPA) is a subarachnoid space in the lateral aspect of the posterior fossa. In this study, we propose a complementary analysis of the CPA from the cerebellopontine fissure. METHODS: We studied 50 hemi-cerebelli in the laboratory of neuroanatomy and included a description of the CPA anatomy from the cerebellopontine fissure and its relationship with the flocculus and the 5th, 6th, 7th, and 8th cranial nerves (CN) origins. RESULTS: The average distance from the 5th CN to the mid-line (ML) was 19...
January 15, 2018: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29325939/liponeurocytoma-of-the-cerebello-pontine-angle
#6
Carmela Chiaramonte, Sylvain Rabaste, Timothee Jacquesson, David Meyronet, François Cotton, Emmanuel Jouanneau, Moncef Berhouma
Liponeurocytoma is a very rare tumor classified as grade II (neuronal and mixed neuronal-glial tumors) according to 2016 WHO classification of Tumors of the Central Nervous System. The median age is 50-years-old and the most frequent location is the posterior cranial fossa especially within the cerebellar hemispheres; those arising in the cerebellopontine angle are exceptional. We herein report the clinical, radiological and pathological characteristics of a cerebellopontine angle liponeurocytoma in a 35-year-old woman...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29315192/long-term-hearing-preservation-outcomes-for-small-vestibular-schwannomas-retrosigmoid-removal-versus-observation
#7
Weidong Zhu, Hongsai Chen, Huan Jia, Yongchuan Chai, Jie Yang, Zhaoyan Wang, Hao Wu
OBJECTIVE: Management of small vestibular schwannomas (VSs) consists of three options: serial observation, radiosurgery, and microsurgery. The authors reported the long-term hearing outcomes after retrosigmoid tumor removal in 110 patients and hearing follow-up outcomes in 160 serial observation patients with small VSs to explore the appropriate management strategy and predictive factors of hearing preservation for small VSs. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center...
February 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29300964/piezosurgery-a-safe-technique-to-perform-lateral-suboccipital-craniotomy
#8
Juergen Grauvogel, Waseem Masalha, Dieter Henrik Heiland, Nadja Jarc, Tanja Daniela Grauvogel, Christian Scheiwe
BACKGROUND: Piezosurgery (PS) is a relatively new technique based on microvibrations generated by the piezoelectric effect. It selectively cuts bone tissue and preserves the surrounding soft tissue. OBJECTIVE: To evaluate the use of PS for performing lateral suboccipital craniotomy. METHODS: PS was used to perform a lateral suboccipital craniotomy in 22 patients who underwent surgery for different cerebellopontine angle (CPA) pathologies in the neurosurgical department...
December 29, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29288394/endoscopic-transorbital-route-to-the-petrous-apex-a-feasibility-anatomic-study
#9
Alberto Di Somma, Norberto Andaluz, Luigi Maria Cavallo, Thomaz E Topczewski, Federico Frio, Rosa Maria Gerardi, Jose Pineda, Domenico Solari, Joaquim Enseñat, Alberto Prats-Galino, Paolo Cappabianca
BACKGROUND: While the subtemporal approach represents the surgical module milestone designed to reach the petrous apex, a novel ventral route, which is the superior eyelid endoscopic transorbital approach, has been proposed to access the skull base. Accordingly, we aimed to evaluate the feasibility of this route to the petrous apex, providing a qualitative and quantitative analysis of this relatively novel pathway. METHODS: Five human cadaveric heads were dissected at the Laboratory of Surgical NeuroAnatomy of the University of Barcelona...
December 29, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29288105/the-top-50-most-cited-articles-on-acoustic-neuroma
#10
Abrar Alfaifi, Othman Almutairi, Maha Allhaidan, Saad Alsaleh, Abdulrazzag Ajlan
BACKGROUND: Acoustic neuroma is the most common extra-axial primary cerebellopontine angle tumour in adults. A plethora of studies have been published about acoustic neuroma, but none of the previous works have highlighted the most influential articles. OBJECTIVES: Our objective was to perform a bibliometric analysis on the 50 most-cited articles concerning acoustic neuroma. METHODS: We performed a title-specific search on the Scopus database, using the following terms: 'acoustic neuroma,' 'vestibular schwannoma,' and 'cerebellopontine angle' as search queries...
December 26, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29279723/diagnostics-and-therapy-of-vestibular-schwannomas-an-interdisciplinary-challenge
#11
REVIEW
Steffen Rosahl, Christopher Bohr, Michael Lell, Klaus Hamm, Heinrich Iro
Vestibular schwannomas (VS) expand slowly in the internal auditory canal, in the cerebellopontine angle, inside the cochlear and the labyrinth. Larger tumors can displace and compress the brainstem. With an annual incidence of 1:100,000 vestibular schwannoma represent 6-7% of all intracranial tumors. In the cerebellopontine angle they are by far the most neoplasm with 90% of all lesions located in this region. Magnetic resonance imaging (MRI), audiometry, and vestibular diagnostics are the mainstays of the clinical workup for patients harboring tumors...
2017: GMS Current Topics in Otorhinolaryngology, Head and Neck Surgery
https://www.readbyqxmd.com/read/29278012/pilocytic-astrocytoma-of-the-cerebellopontine-angle-mimicking-vestibular-schwannoma-report-of-a-rare-entity
#12
Gautam Dutta, Daljit Singh, Hukum Singh, Deepashu Sachdeva, Vikas Kumar, Ashutosh Chaturvedi
We present a rare case of a 55-yr old patient of pilocytic astrocytoma of the cerebello-pontine angle mimicking a vestibular schwannoma. The tumor protruded into the porus acusticus causing enlargement of the internal auditory meatus, which is quite an unusual feature of glial tumours.
December 26, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29275608/-application-of-the-supine-position-in-microsurgery-for-lesions-of-the-cerebellopontine-angle
#13
J Q Li, G Chen, X Li, Z Wang, D Zhou
Objective: To validate the usefulness of the supine position in microsurgery for lesions of the cerebellopontine angle (CPA) by the retrosigmoid approach. Methods: Thirty-nine patients with lesions (22 cases of tumor, 11 cases of trigeminal neuralgia and 6 cases of hemifacial spasm) of the CPA underwent tumor resection surgery or microvascular decompression surgery (MVDS). The patients were operated on in the supine position by retrosigmoid approach with the head turned 50 to 60 degrees away from the lesion and with slight forward flexion of the neck...
December 12, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29241266/cerebellopontine-angle-schwannoma-and-meningioma-in-contiguity-surgical-implications-in-neurofibromatosis
#14
Lokesh Nehete, B N Nandeesh, Rose Dawn Bharath, Malla Bhaskara Rao, Arivazhagan Arimappamagan
No abstract text is available yet for this article.
December 14, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29240310/diagnostic-accuracy-of-high-resolution-t2-weighted-mri-versus-contrast-enhanced-t1-weighted-mri-to-screen-for-cerebellopontine-angle-lesions-in-symptomatic-patients
#15
Mayke A Hentschel, Henricus P M Kunst, Maroeska M Rovers, Stefan C A Steens
OBJECTIVE: To evaluate diagnostic accuracy of high resolution T2-weighted MRI (T2w) for detecting cerebellopontine angle (CPA) lesions compared to a combined protocol including gadolinium enhanced T1-weighted MRI (GdT1w). SETTING: Department of Radiology & Nuclear Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands. PARTICIPANTS: A random sample of MRIs from 350 patients (700 CPAs) with asymmetrical audiovestibular complaints was used, acquired between 2013-2016...
December 14, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29224766/reversible-profound-sensorineural-hearing-loss-due-to-propranolol-sensitive-hemangioma-in-an-infant-with-phace-syndrome
#16
John N Bangiyev, Richard Gurgel, Sheryll L Vanderhooft, J Fredrik Grimmer
PHACE syndrome is the association of large or segmental infantile hemangiomas of the face or scalp with abnormalities within the posterior fossa, arteries, cardiovascular system, and eyes. We present a case of reversible profound sensorineural hearing loss due to a cerebellopontine angle infantile hemangioma that was successfully treated with propranolol.
December 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29222560/masseteric-nerve-transfer-for-facial-nerve-paralysis-a-systematic-review-and-meta-analysis
#17
Alexander W Murphey, William B Clinkscales, Samuel L Oyer
Importance: A review of the role of masseteric nerve transfer is needed to guide its use in facial reanimation. Objective: To systematically review the available literature, and, when applicable, analyze the combined outcomes of masseteric nerve transfer to better define its role in reanimation and to guide further research. Data Sources: Two independent researchers conducted the review using PubMed-NCBI and Scopus literature databases for studies on masseteric nerve transfer for facial nerve paralysis...
December 7, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/29209853/3d-endoscopic-ear-surgery-a-clinical-pilot-study
#18
Daniele Bernardeschi, Ghizlene Lahlou, Daniele De Seta, Francesca Yoshie Russo, Isabelle Mosnier, Olivier Sterkers
OBJECTIVE: To evaluate the feasibility and efficacy of a new high-resolution 3D endoscope in endoscopic ear and lateral skull base surgery. METHODS: Eight patients, five women and three men, were included in this clinical pilot prospective study. Their age was 38 ± 17.3 years (mean ± SD, range 17-54 years). The right side was involved in five cases, and the left side in three cases. There were three cases of chronic otitis, one case of cholesteatoma of the external auditory canal, one case of otosclerosis, one case of cochlear implant surgery, and two cases of stage 2 vestibular schwannoma operated on with a retrosigmoid approach to preserve hearing...
December 5, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29204048/hydrocephalus-caused-by-h3n2-type-a-influenza-virus-or-cerebellopontine-angle-schwannoma
#19
Jakob Nemir, Ivan Domazet, Klara Brgic, Natasa Kovac, Goran Mrak
No abstract text is available yet for this article.
October 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/29184715/unusual-case-of-hemangioblastoma-of-the-cerebellopontine-angle
#20
A R Persad, Y H Khormi, F van Landeghem, M M Chow
Background: Hemangioblastomas are the most common primary tumor of the posterior fossa. There are few cases of hemangioblastoma of the cerebellopontine angle (CPA). When present in this location, hemangioblastoma presents a diagnostic challenge as its imaging findings closely resemble those of vestibular schwannoma (VS), which is much more common in the CPA. Case Description: We report the case of a 42-year-old man presenting with vertigo and diplopia found to have a CPA tumor with imaging resembling VS...
2017: Surgical Neurology International
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