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Cerebellopontine angle

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https://www.readbyqxmd.com/read/28637207/the-use-of-semitranslucent-rubber-pledgets-during-microsurgical-dissection-of-cerebellopontine-angle-tumors-technical-note
#1
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
#2
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...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28627983/susceptibility-weighted-imaging-a-problem-solving-tool-in-differentiation-of-cerebellopontine-angle-schwannomas-and-meningiomas
#3
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
https://www.readbyqxmd.com/read/28584970/morphometric-evaluation-of-facial-and-vestibulocochlear-nerves-using-magnetic-resonance-imaging-comparison-of-meni%C3%A3-re-s-disease-ears-with-normal-hearing-ears
#4
Annika Henneberger, Birgit Ertl-Wagner, Maximilian Reiser, Robert Gürkov, Wilhelm Flatz
Loss of neural structures (such as hair cells or neurones within the spiral ganglion) has been proposed to be involved in Menière's disease (MD) (Spoendlin et al. Acta oto-laryngologica Supplementum 499:1-21, 1; Merchant et al. Eur Arch Oto-Rhino-Laryngol Off J Eur Feder Oto-Rhino-Laryngol Soc (EUFOS) Affil German Soc Oto-Rhino-Laryngol Head Neck Surg 252(2):63-75, 2; Tsuji et al. Ann Otol Rhinol Laryngol Suppl 81:26-31, 3; Kariya, Otol Neurotol Off Publ Am Otol Soc Am Neurotol Soc Eur Acad Otol Neurotol 28(8):1063-1068, 4; Megerian Laryngoscope 115(9):1525-1535, 5) but this has yet to be confirmed...
June 5, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28584917/morphometry-and-microsurgical-anatomy-of-bochdalek-s-flower-basket-and-the-related-structures-of-the-cerebellopontine-angle
#5
Laszlo Barany, Gabor Baksa, Lajos Patonay, Oliver Ganslandt, Michael Buchfelder, Peter Kurucz
BACKGROUND: Bochdalek's flower basket (Bfb) is the distal part of the horizontal segment of the fourth ventricle's choroid plexus protruding through the lateral aperture (foramen of Luschka). The microsurgical anatomy of the cerebellopontine angle, fourth ventricle and its inner choroid plexus is well described in the literature, but only one radiological study has investigated the Bfb so far. The goal of the present study was to give an extensive morphometric analysis of the Bfb for the first time and discuss the surgically relevant anatomical aspects...
June 6, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28576520/clinical-characterization-of-novel-chromosome-22q13-microdeletions
#6
Jennifer F Ha, Ayesha Ahmad, Marci M Lesperance
INTRODUCTION: The advent of chromosome microarray analysis (CMA) for evaluation of patients with multiple congenital anomalies has made it possible to define chromosomal imbalances with greater precision and resolutions significantly smaller than possible by standard G-banded chromosome analysis. We describe two patients with novel chromosomal anomalies involving chromosome 22q13, a locus also associated with Phelan-McDermid syndrome (PMS). OBJECTIVE: We aim to characterize the novel phenotypic and genotypic findings of two patients with 22q13 microdeletions, distinct from PMS, comparing and contrasting with features of PMS...
April 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28552738/dumbbell-shape-hydatid-cyst-of-meckel-s-cave-extending-to-the-cerebellopontine-angle-and-middle-fossa-surgical-technique-and-outcome-of-a-rare-case
#7
Mousa Taghipour, Arash Saffarrian, Fariborz Ghaffarpasand, Negar Azarpira
BACKGROUND: Cerebral hydatid cyst is among the rare presentations of echinococcosis. Almost all the reported cases of the intracranial hydatid cysts are in cortical regions (parietal lobe in the territory of the middle cerebral artery) and all have been removed surgically using water jet dissection technique. However, in locations in which there are several neuronal structures such as cerebellopontine angle this method might not be applicable. CASE DESCRIPTION: A 62-year-old lady presented to our outpatient clinic with left sided facial deviation, inability to close the eyes and diplopia since a month before...
May 25, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28551487/high-resolution-t2-mri-in-the-diagnosis-of-cerebellopontine-angle-and-internal-auditory-canal-lesions
#8
Jonathan T Maslan, Christopher M Lack, Michael Zapadka, Tyler G Gasser, Eric Oliver
High resolution T2 magnetic resonance imaging (MRI) can provide exquisite detail of internal auditory canal (IAC) and cerebellopontine angle (CPA) lesions. In this retrospective case series, blinded imaging sequences were delivered to three radiologists and compared with previously archived clinical reads that were non-blinded and incorporated both T1+C and T2 sequences together. This article demonstrates high sensitivity and specificity for high resolution T2 MRI particularly with lesions >5mm. This suggests a role for high resolution T2 MRI as an initial screening sequence or as a surveillance sequence...
May 13, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28546250/the-management-and-imaging-of-vestibular-schwannomas
#9
REVIEW
E P Lin, B T Crane
Vestibular schwannomas are the most common cerebellopontine angle tumor. During the past century, the management goals of vestibular schwannomas have shifted from total resection to functional preservation. Current treatment options include surgical resection, stereotactic radiosurgery, and observation. Imaging has become a crucial part of the initial screening, evaluation, and follow-up assessment of vestibular schwannomas. Recognizing and understanding the management objectives, various treatment modalities, expected posttreatment findings, and complications allows the radiologist to play an essential role in a multidisciplinary team by providing key findings relevant to treatment planning and outcome assessment...
May 25, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28516966/expanded-transcanal-transpromontorial-approach-to-the-internal-auditory-canal-and-cerebellopontine-angle-a-cadaveric-study
#10
L Presutti, M Bonali, D Marchioni, G Pavesi, A Feletti, L Anschuetz, M Alicandri-Ciufelli
The aim of this paper is to describe and evaluate the feasibility of an expanded endoscopic transcanal transpromotorial approach (ExpTTA) to the internal auditory canal and the cerebellopontine angle. To this end, we performed a cadaveric dissection study in September 2015. In total, 2 heads (4 sides) were dissected focusing on anatomical landmarks and surgical feasibility. Data from dissections were reviewed and analysed for further consideration. In all 4 sides of the cadavers the procedure was feasible. In all cadavers, it was necessary to extensively drill the temporo-mandibular joint and to calibrate the external ear canal to allow adequate room to manoeuver the instruments and optics and to comfortably access the cerebellopontine angle...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28505503/intracranial-neurenteric-cyst-mimicking-an-ependymoma-imaging-features-pathologic-correlation-and-review-of-literature
#11
Steve M Nelson, Derek A Mathis, Joseph K Hobbs, Vincent M Timpone
We present a case of a 57-year-old female with four-months of diplopia and vertigo. MRI revealed a mixed cystic and solid partially enhancing lesion of the 4th ventricle, foramen of Luschka and cerebellopontine angle. Preoperative differential diagnosis favored ependymoma. Biopsy revealed a neurenteric cyst, a benign developmental lesion that rarely occurs intracranially. This case highlights several atypical manifestations of intracranial neurenteric cyst, with regions of histologically benign solid enhancement, multicompartmental extra-axial location mimicking an ependymoma, and rapid recurrence without evidence of underlying malignancy...
July 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28490688/-pre-and-intra-operative-supporting-technology-for-brain-tumors-7-surgery-for-cerebellopontine-angle-brain-tumors
#12
Nobuyuki Nakajima, Michihiro Kohno
No abstract text is available yet for this article.
May 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28490168/primary-glioblastoma-of-the-cerebellopontine-angle-case-report-and-review-of-the-literature
#13
Ji-Hye Lee, Jong Hyun Kim, Taek-Hyun Kwon
Glioblastoma multiforme (GBM) is located most frequently in the cerebral hemispheres. Glioblastoma presenting as an extraaxial mass of cerebellopontine angle (CPA) is very rare in adults. We report a rare case of GBM arising in the CPA. The patient was a 71-year-old female, who complained of progressive gait disturbance and poor memory. Initial magnetic resonance imaging (MRI) revealed a 1.4×1.3 cm mass in the left CPA, with broad base to the petrous bone, showing homogenous enhancement. Follow-up MRI showed a rapid increase in size of mass (2...
May 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28484559/exophytic-pontine-glioblastoma-multiforme-presenting-as-cerebellopontine-angle-mass
#14
Sukhdeep Singh Jhawar, Garewal Singh Sarvpreet, T N Shadangi
Exophytic pontine glioblastoma multiforme (GBM) is a highly malignant tumor of posterior fossa, which is quite rare and such tumor presenting as cerebellopontine (CP) angle mass is even rarer. Here, we describe a 12-year-old boy who presented with imbalance on walking and facial nerve paresis. Magnetic resonance imaging of the brain revealed an irregular ring enhancing mass lesion of the CP angle, which was initially thought to be a tuberculoma, but was later confirmed to be a GBM. Clinical and radiological differentiation of uncommon lesions of CP angle in children is discussed with brief review of pertaining literature...
April 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28484537/dorsally-exophytic-glioblastoma-arising-from-the-medulla-oblongata-in-an-adult-presenting-as-4-th-ventricular-mass
#15
Kuntal Kanti Das, Guru Prasad Bettaswamy, Anant Mehrotra, Sushila Jaiswal, Awadhesh Kumar Jaiswal, Sanjay Behari
Brainstem gliomas are relatively rare in adults (<2% of all gliomas). Exophytic gliomas are focal brainstem lesions, which project into the 4(th) ventricle or cerebellopontine angles. These exophytic lesions are usually of low-grade histology (pilocytic astrocytoma or ganglioglioma) and have a relatively better outcome compared with brainstem gliomas as a whole. Glioblastoma is the commonest primary glial cell neoplasm and mostly occurs in the supratentorial compartment. It is rather uncommon in the brainstem and seldom has been described as having an exophytic growth pattern...
April 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28481390/multimodal-intraoperative-neurophysiologic-monitoring-in-the-neurosurgical-oncology
#16
Sema Brandmeier, Emine Taşkiran, Fatihhan Bölükbaşi, Ramazan Sari, İlhan Elmaci
AIM: Neurosurgical oncology that is performed for lesions located in critical areas like the sensorimotor area has additional risk because it may cause serious neurological deficiencies. Some intraoperative neuromonitoring (IONM) modalities can effectively help the surgeons to maximize resections of this kind of lesions with or without an acceptable neurological deficiency. Our aim was to share our IONM experiences with patients who underwent intracranial lesion surgery in critical areas between September 2013 and January 2015...
March 26, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28479521/the-retrolabyrinthine-presigmoid-approach-to-the-anterior-cerebellopontine-region-expanding-the-limits-of-trautmann-s-triangle
#17
Fernando Alonso, Simone E Dekker, James Wright, Christina Wright, Andrea Alonso, Margaret Carmody, R Shane Tubbs, Nicholas C Bambakidis
The anatomical area exposed through the exposure of Trautmann's triangle may not be sufficient. We studied the additional exposure provided by skeletonizing the sigmoid sinus. Human cadaver heads were subjected to a thin temporal bone CT scan for a total of 10 sides. The estimated surgical working angle was calculated based on the relationship of the sigmoid sinus to the posterior semicircular canal, superior petrosal sinus and jugular bulb on imaging. The heads were then subjected to a mastoidectomy and remeasured with and without sigmoid sinus skeletonization...
May 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28476467/painful-trigeminal-neuropathy-attributed-to-a-space-occupying-lesion-presenting-as-a-toothache-a-report-of-4-cases
#18
Noboru Noma, Makoto Hayashi, Isao Kitahara, Andrew Young, Maasa Yamamoto, Kosuke Watanabe, Yoshiki Imamura
Painful trigeminal neuropathy attributed to a space-occupying lesion (code 13.1.2.5 in the International Classification of Headache Disorders, 3rd edition [beta version]) is an orofacial pain condition that has characteristics of classical trigeminal neuralgia but is caused by a space-occupying lesion. We present 4 cases of intracranial lesions mimicking odontogenic pain as follows: case 1, a 61-year-old woman presented with a chief complaint of aching soreness in the right mandibular molar area for 1 year; case 2, a 59-year-old man presented with severe pain in the left maxillary and mandibular molars; case 3, a 72-year-old man presented with a chief complaint of facial shock-like pain on the left side; and case 4, a 75-year-old man presented with a chief complaint of paroxysmal pain and numbness in the buccal gingiva of the right mandibular molar region...
May 2, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28468211/symptomatic-trigeminal-neuralgia-caused-by-cerebellopontine-angle-tumors
#19
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/28450069/circulating-steroids-negatively-correlate-with-tinnitus
#20
Pavel Chrbolka, Zoltán Palúch, Martin Hill, Štefan Alušík
While not a disease entity in itself; symptoms of tinnitus (from Latin tinnio - clink) accompany a number of diseases. Tinnitus prevalence increases with age, deteriorates one's quality of life, and may even result in suicidal behavior. Tinnitus develops in response to a variety of risk factors, otoxic substances, noise exposure, hearing disorders, and psychological alterations. Tinnitus is closely related to mood, depression, and psychological state. In the present study, we focused on alterations of the steroid metabolome and particularly neuroactive, neuroprotective, and immunomodulatory steroids in patients with tinnitus...
April 25, 2017: Steroids
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